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Fish preservation

Fish preservation involves a range of techniques aimed at extending the shelf life of fish by inhibiting spoilage caused by microbial growth, enzymatic reactions, and oxidation, thereby maintaining its nutritional value, texture, and safety for consumption.^[1] These methods have been crucial for food security in fishing communities worldwide, particularly in areas without reliable cold chains, allowing fish to be stored and transported over long distances.^[2] Traditional preservation techniques, dating back thousands of years, primarily rely on reducing water activity or adding antimicrobial agents to prevent deterioration.^[2] Drying, often done via sun exposure, removes moisture to inhibit bacterial and mold growth, commonly used in small-scale fisheries for products like stockfish.^[1] Salting involves applying dry salt or brine to draw out water and create a high-salt environment hostile to microbes, frequently combined with drying for enhanced stability.^[1] Smoking uses wood smoke to impart flavor while dehydrating the fish and depositing phenolic compounds with preservative effects, resulting in lightly or heavily smoked varieties.^[1] Fermentation, another ancient approach, leverages controlled microbial activity to produce acidic conditions that preserve fish, as seen in products like fish sauce.^[2] In contrast, modern methods focus on temperature control and sterilization to achieve longer-term preservation with minimal quality loss.^[2] Freezing, which began commercial expansion after World War II, rapidly lowers fish temperature to below -18°C to halt biochemical processes, preserving nutrients better than many traditional techniques.^[2]^[3] Canning, established as an industry by 1900, seals fish in airtight containers and heats them to destroy pathogens, yielding shelf-stable products rich in protein and omega-3 fatty acids.^[2] Emerging innovative approaches, such as non-thermal technologies, further enhance safety and quality without excessive heat.^[4] For instance, pulsed electric fields (PEF) disrupt microbial cell membranes to reduce bacterial loads while retaining sensory attributes, and cold atmospheric plasma inactivates pathogens on fish surfaces, extending shelf life up to 14 days in some species.^[4] These advancements address challenges like lipid oxidation and contamination, supporting global fish trade valued at USD 164 billion as of 2024.^[5]

History and Evolution

Ancient and Traditional Practices

Early methods of fish preservation date back to the Mesolithic period, with archaeological evidence indicating fermentation techniques around 7200 BCE at sites in southern Sweden, where fish were stored in pits to create acidic conditions for preservation.^[6] By around 3000 BCE, coastal societies in regions such as Mesopotamia and ancient Egypt employed salting and sun-drying to extend shelf life in response to the perishability of fresh catches. In Egypt's Old Kingdom (ca. 2649–2150 BCE), tomb reliefs from Giza depict systematic fish butchery, including lengthwise splitting through the skull, to facilitate drying and long-term storage, reflecting organized exploitation of Nile fisheries. Similarly, in Mesopotamia around 3000 BCE, fish were preserved primarily through salting to draw out moisture and inhibit bacterial growth. Indigenous Pacific cultures, particularly along the Northwest Coast of North America, developed comparable techniques millennia ago, relying on sun and wind drying of salmon on outdoor racks in drier interior areas like the Fraser River canyon, where hot winds could dry fillets in a few days.^[7]^[8]^[9] Specific techniques varied by region and climate but centered on natural processes to reduce water activity and add antimicrobial properties. Air-drying on elevated wooden racks, known as stockfish production, was perfected by Viking communities in northern Norway during the Viking Age (ca. 800–1066 CE), where cod from the North East Arctic were split and dried in cold Arctic winds without salt, yielding a lightweight, durable product suitable for long voyages. Smoking over open fires using hardwoods like alder or cedar was widespread, as seen in early Chinese records where fish were hung and exposed to smoke for flavor and preservation, a method akin to those used by Northwest Coast Indigenous groups in smokehouses to protect against damp coastal conditions. Fermentation and early pickling involved brine or vinegar; in ancient Rome, garum—a fermented sauce from fish viscera like mackerel or tuna—was produced by layering salted guts in vats and allowing sun fermentation for 2–3 months, while similar brining techniques appear in ancient Chinese practices for pickling.^[10]^[11]^[9]^[12] These practices played a crucial socio-economic role, enabling extensive trade networks and ensuring food security beyond coastal areas. Salted fish became a staple in Mediterranean commerce from the Bronze Age onward, transforming perishable catches into durable commodities that fueled Phoenician, Greek, and Roman economies, with products like garum exported across the empire for use in cuisine and medicine. Viking stockfish supported transatlantic exchanges, providing protein for inland European populations and even reaching as far as medieval England and Iceland. For non-coastal communities, such as inland Indigenous groups in the Pacific Northwest, preserved fish like smoked salmon ensured year-round nutrition during seasonal scarcities. However, these methods were heavily dependent on local climate, leading to inconsistent quality and high spoilage rates in humid or rainy regions, where incomplete drying allowed mold growth and contamination from insects or dust, often resulting in significant losses during adverse weather.^[13]^[12]^[10]^[9]^[14] Such traditional approaches dominated until the 19th century, when industrialization introduced mechanized refrigeration and canning to overcome climatic limitations.^[15]

Industrial and Technological Advances

The industrialization of fish preservation began in the 19th century with pivotal inventions that mechanized processes previously reliant on manual labor and natural conditions. In 1809, French inventor Nicolas Appert developed the canning method by sealing food in airtight glass jars and heating them in boiling water, a technique initially rewarded by Napoleon for military provisions and soon adapted for fish to enable long-term storage without spoilage.^[16] This breakthrough laid the foundation for commercial canning of seafood, such as sardines and tuna, transforming localized fishing into exportable commodities. Concurrently, mechanical refrigeration emerged post-1850s, with ammonia-based systems first applied in France and the United States for artificial ice production, allowing chilled transport of fresh fish via rail cars and ships, which extended market reach beyond coastal areas.^[17]^[18] The early 20th century accelerated these advances through rapid freezing innovations. In 1924, American inventor Clarence Birdseye patented a quick-freezing apparatus that used air-blast methods to freeze fish at -40°C, preserving texture and flavor by minimizing ice crystal formation in cellular structures—an insight drawn from observing Inuit preservation techniques.^[19] This technology spurred the establishment of commercial freezing plants in the 1930s, particularly in the United States and Europe, where facilities like those operated by Birdseye's companies processed fish fillets on an industrial scale, enabling year-round supply chains.^[20] Mid-century developments further enhanced preservation efficiency. Vacuum packaging, invented in the 1950s by German engineer Karl Busch, removed oxygen from sealed pouches to inhibit bacterial growth and oxidation in fish products, extending shelf life for refrigerated transport and retail.^[21] In the 1960s, trials of food irradiation under the U.S. Atomic Energy Commission explored low-dose gamma rays to pasteurize fish and shellfish, reducing microbial loads while maintaining quality, though adoption remained limited due to regulatory hurdles and consumer concerns.^[22] These technological shifts profoundly impacted the global fish industry by facilitating international trade and minimizing waste. Preservation methods like canning, freezing, and vacuum packing significantly reduced post-harvest losses in developed nations, primarily through improved handling and distribution networks that connected distant markets.^[23] Regionally, Japan's post-World War II surimi processing exemplified this scalability; mechanized production of frozen surimi from Alaska pollock surged from the 1960s, leveraging cryoprotectants to stabilize minced fish paste for export, turning surplus catches into imitation crab and other products.^[24] In Europe, the smoked fish sector expanded in the 20th century with electrification, enabling precise temperature-controlled kilns that standardized production of herring and salmon, boosting trade volumes across the continent.^[25]

Principles of Preservation

Understanding Spoilage Mechanisms

Fish spoilage primarily arises from three interconnected processes: autolysis, microbial growth, and lipid oxidation, each contributing to the rapid deterioration of post-harvest fish quality. Autolysis involves the enzymatic breakdown of muscle tissues by the fish's own digestive and endogenous proteases, which hydrolyze myofibrillar proteins and release free amino acids and peptides, initiating texture softening and flavor changes shortly after death. This process is most pronounced in the first 24-48 hours at ambient temperatures around 20°C, as enzyme activity peaks before microbial dominance takes over. Microbial growth, dominated by psychrotrophic bacteria such as Pseudomonas spp., leads to proteolysis and the production of off-odors, including fruity and putrid smells, through the metabolism of proteins and lipids into volatile compounds like trimethylamine. Lipid oxidation, particularly in fatty fish, results in rancidity via the peroxidation of polyunsaturated fatty acids, generating secondary products such as aldehydes that impart metallic or fishy tastes and reduce nutritional value. The stages of spoilage begin with rigor mortis, an immediate postmortem phenomenon where muscle ATP depletion causes fiber contraction and stiffness, typically resolving within hours to days depending on fish condition. This is followed by initial freshness loss, occurring over the first 1-3 days when stored on ice at 0°C, marked by subtle declines in odor and texture due to early autolytic and minor microbial activity. Advanced decomposition then ensues, characterized by bacterial proliferation that breaks down nitrogenous compounds into ammonia and other volatiles, leading to overt signs of putrefaction such as slime formation and strong ammoniacal odors. Several variables influence the rate and extent of these spoilage mechanisms. Fish species play a key role, as those with high omega-3 polyunsaturated fatty acid content, such as salmon, exhibit accelerated lipid oxidation due to the susceptibility of these lipids to peroxidation, resulting in faster rancidity development compared to leaner species. Handling practices, including prompt gut evisceration, significantly mitigate spoilage by removing the primary source of contaminating bacteria from the viscera, thereby reducing initial microbial load and slowing decomposition. Environmental factors, particularly temperature, are critical; microbial growth rates double for every 10°C rise above 0°C, exponentially hastening spoilage through enhanced bacterial metabolism and enzyme activity. Spoilage progression is assessed using biochemical indicators, with total volatile basic nitrogen (TVB-N) levels serving as a reliable measure of protein breakdown; values exceeding 30 mg/100 g indicate unacceptable decomposition and spoilage in most fish species. In scombroid fish like mackerel and tuna, histamine formation represents a specific hazard during bacterial decomposition, where histidine-decarboxylating bacteria convert free histidine to histamine levels above 50 mg/100 g, posing risks of scombroid poisoning even if other spoilage signs are mild. These indicators provide foundational metrics for evaluating preservation efficacy by targeting the underlying biological and chemical drivers of deterioration.

Key Control Factors

Fish preservation relies on controlling key environmental and biological factors to inhibit spoilage mechanisms, such as autolysis and microbial proliferation. Temperature is a primary control factor, as lowering it reduces the rates of chemical reactions and microbial growth; according to the Q10 temperature coefficient, spoilage rates in fish increase by a factor of approximately 4 to 6 for every 10°C increase in temperature.^[26] Water activity (a_w) represents the availability of free water for microbial and enzymatic activity, and reducing it below 0.85 effectively inhibits the growth of most pathogenic and spoilage bacteria in fish products.^[27] Similarly, pH levels below 4.5 create an acidic environment that limits bacterial proliferation, including pathogens like Clostridium botulinum, by disrupting cellular processes.^[28] Oxygen control is essential to prevent lipid oxidation, which leads to rancidity; minimizing oxygen exposure slows oxidative deterioration in fish lipids.^[29] Microbial load management through lethal treatments, such as heat or irradiation, directly reduces initial populations of spoilage organisms. These factors often interact synergistically rather than acting in isolation, a principle encapsulated in the multiple hurdles concept introduced by Leistner in 1978, where sub-lethal stresses from combined controls—such as moderate temperature reduction paired with lowered a_w—intensify preservation effects without overly compromising sensory quality.^[30] Quantitative thresholds guide effective application: freezing fish at -18°C significantly reduces enzyme activity and halts microbial growth, extending shelf life for months, though optimal long-term storage recommends temperatures below -20°C to further minimize residual enzymatic action.^[31] Salting to 10-20% NaCl concentration lowers a_w to approximately 0.75, creating an osmotic environment inhospitable to most microbes while preserving texture in products like salted cod.^[32] The efficacy of these controls depends on the initial freshness of the fish at harvest, as measured by the K-value (the percentage of ATP degradation products relative to total nucleotides); a K-value less than 20% indicates high freshness, reflecting low degradation of ATP to products like inosine and hypoxanthine, ensuring subsequent preservation methods yield optimal results.^[33]

Temperature-Based Methods

Chilling and Refrigeration

Chilling and refrigeration involve storing fish at temperatures above the freezing point, typically between 0°C and 4°C, to slow microbial growth, enzymatic activity, and chemical reactions that lead to spoilage, thereby extending shelf life while preserving sensory and nutritional qualities.^[34] This method is widely applied in the fishing industry from catch to retail, as it maintains the fish in a fresh-like state without the structural changes associated with freezing.^[35] Ice chilling, the most common approach, uses flake or block ice to rapidly cool fish to near 0°C, often achieving a shelf life extension of 10 to 14 days for lean species under optimal conditions.^[36] In this process, fish are layered with ice in insulated boxes or holds, where the melting ice absorbs heat and keeps temperatures low, preventing rapid bacterial proliferation.^[37] For larger catches, refrigerated sea water (RSW) systems circulate chilled seawater at 0°C to -2°C around the fish in onboard tanks, providing uniform cooling and preserving quality for pelagic species like tuna and sardines during transport.^[38] Superchilling advances this by lowering temperatures to -1°C to -2°C, just below the initial freezing point of the fish (around -1.5°C to -2°C depending on species), inducing partial ice crystal formation in the extracellular spaces without fully freezing the product.^[39] This technique can extend shelf life by 20 to 30 days or more, as the ice formation concentrates solutes and inhibits microbial activity more effectively than standard chilling.^[40] Technological innovations like slush ice and pumpable ice systems, developed in the 1990s, enhance chilling efficiency by producing a slurry of fine ice particles in water that can be pumped directly onto fish or through distribution lines for even cooling.^[37] These systems, often used in combination with RSW, reduce cooling times compared to traditional flake ice and are particularly effective for high-volume operations.^[41] At the retail level, display cases maintained at 0°C ensure continued preservation during sales.^[42] Chilling preserves fish texture by minimizing protein denaturation and drip loss, while retaining essential nutrients such as omega-3 fatty acids and vitamins that may degrade at higher temperatures.^[35] However, it is energy-intensive due to the need for continuous refrigeration and ice production, and temperature fluctuations above 5°C can promote histamine formation in scombroid species, posing a food safety risk.^[43] In tropical fisheries, flake ice chilling is crucial for maintaining quality, for up to 7 days in species like mackerel, despite ambient heat challenges. Freezing serves as a deeper extension of these methods for longer-term storage.^[35]

Freezing Techniques

Freezing techniques preserve fish by reducing temperatures below -2°C, halting microbial growth and enzymatic activity while minimizing spoilage. This method contrasts with chilling by inducing a fully frozen state for extended storage, often following an initial chilling step to prepare the product. Key processes include slow and quick freezing, each affecting ice crystal formation and tissue integrity differently.^[44] Slow freezing, typically occurring in household freezers at around -18°C, proceeds gradually at rates below 2 mm/h, leading to the formation of large ice crystals that puncture cell membranes and damage muscle structure. This results in increased drip loss upon thawing and a softer, less desirable texture due to protein denaturation and fluid leakage. In contrast, quick freezing employs blast systems at -30°C to -40°C, achieving rates of 5-30 mm/h or higher, which form smaller, uniform ice crystals confined within cells, thereby preserving texture and limiting drip loss to under 5%. For instance, rapid freezing of shrimp muscle at -95°C using liquid nitrogen yielded thawing losses as low as 0.91%, compared to 1.53% with conventional air blast methods.^[45]^[44]^[46]^[47] Frozen fish storage requires maintaining temperatures at -18°C or lower to prevent quality deterioration, with optimal conditions at -30°C extending shelf life significantly. At -18°C, lean fish like cod can remain viable for up to 8 months, while fatty species such as salmon last about 4 months before noticeable changes occur. Superfreezing to -30°C or below supports ultra-long-term preservation, allowing lean fish to endure 24 months with minimal degradation, as lower temperatures slow molecular diffusion and ice recrystallization.^[44] Innovations in freezing enhance efficiency and quality for commercial applications. Individually quick frozen (IQF) technology freezes portions separately at -30°F to -40°F (-34°C to -40°C) using fluidized beds or cryogenic agents, preventing clumping and retaining natural shape, flavor, and nutrients in seafood like shrimp and fillets. Cryogenic freezing with liquid nitrogen achieves even faster rates, as low as -95°C, producing minimal cellular damage and superior water-holding capacity compared to mechanical methods, ideal for premium products.^[46]^[47] Recent innovations, such as ultrasound-assisted freezing (as of 2025), further improve ice crystal control and quality preservation.^[48] Despite these advances, quality issues arise during storage and thawing. Recrystallization occurs when temperature fluctuations cause smaller ice crystals to merge into larger ones during thawing, exacerbating muscle damage and drip loss; controlled thawing at below 4°C mitigates this by slowing the process. In fatty fish, oxidative rancidity develops after about 6 months at -18°C, degrading polyunsaturated fatty acids and producing off-flavors from lipid peroxidation, though lower temperatures like -30°C delay onset.^[49]^[49]

Water Activity Reduction Methods

Drying and Dehydration

Drying and dehydration are essential methods for preserving fish by reducing water activity (a_w) to levels that inhibit microbial growth, typically below 0.75, thereby extending shelf life without refrigeration.^[50] This process involves the removal of moisture through evaporation or sublimation, preventing spoilage from bacteria, yeasts, and molds that require higher a_w for proliferation. In traditional and modern contexts, these techniques have been pivotal in regions with abundant fish resources but limited cold storage, transforming perishable catches into stable products for trade and consumption.^[51] Traditional sun or air drying exposes cleaned and often split fish to natural sunlight and wind, gradually reducing moisture content to 10-15% and achieving a_w of 0.6-0.7, which effectively halts most microbial activity.^[52] This method, practiced for millennia in coastal communities, relies on low humidity and consistent airflow to avoid contamination, with drying times varying from days to weeks depending on climate. For instance, in tropical areas, fish are frequently split and arranged on racks or mats to facilitate even evaporation, yielding products that retain much of their protein but require protection from insects and rain.^[53] Modern mechanical drying employs controlled hot-air dryers to accelerate the process, maintaining temperatures around 50-60°C for uniform moisture reduction to below 15%, while spray drying atomizes fish emulsions into hot air to produce fine powders with less than 5% moisture, suitable for fish meal or supplements.^[51] These systems mitigate weather dependency and contamination risks associated with open-air methods, enabling year-round production in industrial settings. Hot-air dryers circulate heated air over trays of fish, reducing drying time to hours, whereas spray drying is particularly used for by-products like fish oil concentrates.^[54] Freeze-drying, or lyophilization, involves freezing fish to -40°C or lower, then applying vacuum to sublimate ice directly into vapor, preserving structure and removing up to 95% of moisture without liquid phase transition. This technique retains approximately 90% of original nutrients, including heat-sensitive vitamins and proteins, making it ideal for premium products like instant soups or pet foods. Unlike convective drying, it minimizes oxidation and maintains sensory qualities, though it is energy-intensive and costlier.^[55]^[56] A prominent application is stockfish, where cod is air-dried to about 10% moisture over 2-3 months, resulting in a product that rehydrates to nearly five times its dry weight when soaked, restoring texture for cooking.^[57] In tropical regions, jerky-style dehydration produces chewy strips from species like tuna or mackerel, using low-heat air circulation to achieve 10-12% moisture, providing portable, protein-rich snacks. These methods are occasionally combined with light salting to enhance flavor and further lower a_w prior to drying.^[58] Despite advantages, challenges include case hardening, where rapid surface drying forms a hard outer layer that traps interior moisture, potentially leading to uneven rehydration and mold growth if a_w exceeds 0.75 internally. Heat-based drying can cause substantial nutrient losses, particularly for heat-sensitive vitamins; for example, vitamin A degradation often reaches 77-87% at drying temperatures of 50-80°C, emphasizing the need for optimized conditions to preserve quality.^[59]

Salting and Curing

Salting and curing preserve fish by reducing water activity through the osmotic action of salt, which draws moisture from the fish tissues and inhibits microbial growth. This method, one of the oldest preservation techniques, involves applying sodium chloride (NaCl) to fish, either directly or in solution, to achieve salt concentrations typically between 6% and 20% in the final product.^[60] Dry salting, also known as kench curing, entails layering clean fish with dry salt at approximately 20% of the fish's weight, allowing osmosis to extract about 30% of the water content over several days while the fish is stacked and periodically drained. This process results in a firm texture suitable for long-term storage. Wet brining, in contrast, immerses fish in a salt solution of 10-20% concentration for hours to days, enabling even salt penetration without direct contact, and is often used for larger or fatty species like salmon. Heavy salting employs higher concentrations (up to 25% salt) for indefinite ambient storage, producing products like salt cod that remain stable due to minimal available water.^[61] Variants of salting include pickling, where fish is cured in a brine combined with vinegar to achieve a pH of 3.5-4.0, enhancing acidity for additional microbial control and tangy flavor, as seen in Scandinavian pickled herring. Sugar cures, such as in gravlax, mix salt with sugar (often in a 1:1 ratio by weight) to balance flavors and draw out moisture gently over 24-36 hours, preserving delicate salmon without overpowering saltiness.^[62]^[63] Microbiologically, salting inhibits most spoilage bacteria by favoring halotolerant species while reducing water activity (a_w) to around 0.85 or below, preventing growth of pathogens like Clostridium botulinum, which requires a_w above 0.93 for toxin production. This osmotic stress dehydrates microbial cells, limiting proliferation and extending shelf life to months under cool conditions.^[64]^[65] Salting enhances umami flavors through protein denaturation and salt penetration but can cause "salt burn," a textural degradation from excessive drying of surface tissues if salt exceeds 20%. Modern low-salt versions, using 5% NaCl combined with natural additives like potassium chloride or lactic acid bacteria, maintain safety and reduce sodium intake while preserving quality, often verified through microbial testing. Hybrid products may briefly combine salting with drying to further lower moisture for extended stability.^[66]^[51]^[61]

Microbial Load Management

Physical Treatments

Physical treatments for fish preservation encompass non-chemical methods that apply energy forms such as heat, light, or radiation to inactivate microbial populations, thereby extending shelf life without relying on sustained low temperatures or additives. These interventions target vegetative bacteria, yeasts, and molds while often sparing heat-resistant spores, making them suitable for surface decontamination or achieving commercial sterility in processed products. Unlike prolonged chilling or freezing, physical treatments deliver short, intense exposures to disrupt microbial cellular structures, DNA, or enzymes.^[35] Heat-based methods are foundational in fish processing, with pasteurization involving mild heating at 60-80°C for 10-30 minutes to eliminate vegetative pathogens like Listeria monocytogenes and Salmonella, though it does not destroy bacterial spores. This process achieves reductions of 5-6 log cycles for target pathogens in fishery products, preserving sensory qualities better than full sterilization while reducing spoilage organisms. For instance, pasteurization targets a 6D reduction (six decimal reductions) of Listeria in smoked or marinated fish, ensuring safety for refrigerated storage up to several weeks. In contrast, sterilization employs higher temperatures, typically 121°C for 3-20 minutes in canning operations, to attain a 12D reduction of Clostridium botulinum spores, rendering low-acid fish products commercially sterile and shelf-stable at ambient conditions. This standard, established for botulism prevention, ensures no viable pathogens survive, as proteolytic C. botulinum spores require such lethality for safety in sealed containers.^[67]^[68]^[69]^[70]^[71] Beyond thermal approaches, high-intensity light treatments, including ultraviolet (UV-C) and pulsed light, provide non-thermal options for surface microbial inactivation on fish fillets or whole products. UV-C light at doses of 0.05-0.79 J/cm² reduces total bacterial counts by 4-5 log cycles, primarily by damaging microbial DNA and preventing replication, with efficacy increasing with exposure time on fish surfaces. Pulsed light, delivering short bursts of broad-spectrum wavelengths, achieves similar 4-5 log reductions of pathogens like Listeria monocytogenes on seafood such as salmon and flatfish, offering rapid treatment without significant heat buildup. Gamma irradiation, using cobalt-60 sources at 1-10 kGy, penetrates deeper to inactivate bacteria, parasites, and viruses in fresh or frozen fish, with doses up to 5.5 kGy approved by the FDA for molluscan shellfish to control pathogens like Vibrio species, and 1-3 kGy commonly applied for finfish to extend shelf life and reduce parasites without substantially altering nutritional profiles.^[72]^[73]^[74]^[75] Practical applications highlight the versatility of these treatments in industrial settings. Canned tuna undergoes sterilization at 121°C to achieve full microbial sterility, yielding a shelf life of 2-5 years at room temperature when seals remain intact. UV-C systems integrated into conveyor belts in fish processing plants treat fillets or skins during packaging lines, delivering uniform exposure for 3-5 log bacterial reductions without contact, enhancing hygiene in high-volume operations. Irradiation at 1-3 kGy extends the refrigerated shelf life of fresh fish like shrimp by 1-2 weeks by targeting Vibrio species.^[76]^[77]^[78]^[79] Despite their efficacy, physical treatments present challenges related to product quality. Heat from pasteurization or sterilization induces protein denaturation and starch gelatinization in fish muscle, leading to softer textures, reduced firmness, and chewiness, as myofibrillar proteins gel between 40-90°C, altering the natural flakiness of species like tuna or salmon. High-dose irradiation (above 5 kGy) can generate off-flavors and odors in fatty fish through lipid oxidation, producing rancid notes detectable by consumers, though doses under 3 kGy minimize such effects in lean varieties.^[80]^[81]^[82]^[83]

Chemical and Biopreservation

Chemical preservation of fish involves the addition of synthetic antimicrobials to inhibit microbial growth and extend shelf life. Potassium sorbate, typically applied at concentrations of 0.1-0.2%, effectively inhibits molds and yeasts in fish products by disrupting microbial cell membranes.^[84] Sulfites, such as sodium metabisulfite, serve dual roles as antimicrobials and antioxidants but are limited in finfish applications due to regulatory restrictions and potential allergenicity, with maximum levels often capped at 100 mg/kg in fresh products.^[84] Biopreservation employs natural agents derived from microorganisms, plants, and animals to achieve similar inhibitory effects while aligning with consumer preferences for minimal processing. Lactic acid bacteria (LAB), such as Lactobacillus species, are commonly used in fish fermentation, producing bacteriocins—antimicrobial peptides that target spoilage organisms like Listeria monocytogenes—and lowering pH to around 4.0 through lactic acid accumulation, which creates an acidic environment hostile to pathogens.^[85] Plant extracts, including rosemary, provide antioxidant properties by scavenging free radicals, thereby reducing lipid oxidation in fish fillets during storage.^[86] Chitosan, derived from crustacean shells, acts as an antifungal coating by forming a semi-permeable barrier that limits microbial adhesion and oxygen ingress on fish surfaces.^[86] Practical applications of these methods include the production of fermented fish sauces, such as Vietnamese nuoc mam, which combines approximately 20% salt with LAB-driven fermentation to preserve anchovies or other small fish for 12-18 months, yielding a stable, flavorful product resistant to spoilage.^[87] Edible films incorporating essential oils, like oregano or clove, applied to fish fillets have been shown to extend shelf life by up to 50% under refrigerated conditions by suppressing bacterial proliferation and maintaining sensory quality.^[88] Regulatory frameworks govern the use of these preservatives to ensure safety. Since the early 2010s, the rise of "clean label" trends has driven increased adoption of biopreservatives over synthetics, as consumers favor natural ingredients without artificial additives.^[89]

Oxidation and Oxygen Control

Packaging Innovations

Packaging innovations in fish preservation primarily involve physical barriers and material advancements that isolate fish products from environmental factors such as oxygen, moisture, and microbial contaminants, thereby extending shelf life and maintaining quality. These innovations emphasize high-barrier films and interactive systems that actively manage spoilage without relying on internal gas modifications. Key developments include vacuum packaging, active packaging components, specialized frozen storage solutions, and monitoring technologies, all of which have been widely adopted in the seafood industry to reduce waste and ensure safety. Vacuum packaging removes 97-99% of air from the package, creating a low-oxygen environment that inhibits aerobic bacterial growth and significantly reduces lipid oxidation in fish products. By utilizing high-barrier materials such as polyethylene terephthalate/low-density polyethylene (PET/LDPE) laminates with oxygen permeability below 150 cm³/m²·24h·atm, vacuum packaging can extend the shelf life of fresh fish by 3-5 times compared to air exposure, for example, increasing storage duration for species like cod fillets from 9 days to 12-20 days. This method is particularly effective for fatty fish, where it minimizes rancidity and preserves sensory attributes like texture and flavor.^[90]^[91] Active packaging further enhances preservation through integrated components that interact with the packaged environment. Oxygen scavengers, often iron-based sachets, can reduce residual oxygen to less than 0.01% within 24 hours, preventing oxidative spoilage and extending shelf life for products like seer fish from 12 days in air to 20-25 days. Antimicrobial films, incorporating agents such as silver nanoparticles, release ions to inhibit microbial proliferation and reduce bacterial loads on fish surfaces, improving overall safety. These systems are cost-effective and compatible with existing packaging lines, making them suitable for both fresh and processed fish.^[90]^[91]^[92] For frozen fish, moisture-vapor barrier films are essential to prevent freezer burn and dehydration during storage. These films, typically multilayer structures with low water vapor transmission rates, limit sublimation and maintain product weight, reducing losses to minimal levels and preserving texture and appearance over extended periods. Advances in this area include the development of smart labels with time-temperature indicators (TTI) that undergo color changes to signal exposure to abusive conditions, allowing real-time quality assessment without opening the package. Such innovations, established prior to 2015, have become standard in commercial frozen seafood distribution to ensure compliance with quality standards.^[90]^[93]

Atmosphere Modification

Atmosphere modification in fish preservation involves altering the gaseous composition surrounding the product to inhibit oxidative reactions and aerobic microbial growth, primarily through reduced oxygen levels and elevated carbon dioxide concentrations. Controlled atmosphere (CA) storage and modified atmosphere packaging (MAP) are key techniques, where oxygen is minimized to below 5%—often approaching 0-1% via gas flushing or compensated vacuum methods—to limit aerobic spoilage bacteria such as Pseudomonas spp. and Shewanella putrefaciens, while carbon dioxide is increased to 40-80% to dissolve into the fish tissue, lowering pH (e.g., from 7.0 to 6.0) and creating an antimicrobial environment that extends lag phases and reduces growth rates of psychrotrophic bacteria.^[29] Nitrogen serves as an inert filler gas (20-60%) to maintain package integrity without contributing to microbial activity or oxidation.^[29] The antimicrobial effects stem from carbon dioxide's solubility, which not only suppresses specific spoilers like Pseudomonas but also indirectly controls redox potential by limiting oxygen availability for enzymatic browning and lipid peroxidation in fatty fish species. In CA bulk storage, high CO₂ levels (up to 90%) are applied during transport or holding, effectively inhibiting aerobes and extending sensory quality, though this requires precise monitoring to avoid excessive dissolution leading to increased drip loss (2-6%). For even gas penetration in irregularly shaped products, techniques like vacuum-assisted tumbling can distribute the atmosphere uniformly prior to sealing, enhancing efficacy in processed items such as fillets. High oxygen hyperbaric treatments (e.g., 50% O₂/50% CO₂ at 150-200 MPa for 10-30 minutes) provide an initial microbial reduction (2-3.5 log cfu/g) against pathogens like Salmonella and Listeria monocytogenes before shifting to low-oxygen MAP to prevent regrowth.^[29]^[94] Applications of these methods are prominent in extending shelf life for various fish products under refrigeration (0-5°C). For Atlantic salmon fillets packaged in 60% CO₂:40% N₂ MAP, shelf life reaches 22-23 days based on microbial counts below 10⁶ cfu/g and sensory evaluation, compared to 10-14 days in air packaging. In smoked salmon, MAP with 40-60% CO₂ significantly prolongs usability to over 35-40 days by curbing post-smoking aerobic contamination, outperforming traditional air-stored samples that spoil within 14 days due to rapid Pseudomonas proliferation. Cod loins benefit from CA combined with superchilling, achieving 21 days of quality retention, while shrimp and trout show similar extensions against histamine-forming bacteria. These approaches are particularly valuable for export and retail, where maintaining high-quality raw material is essential for optimal results.^[29]^[95]^[29] Despite these benefits, limitations include the risk of package collapse from high CO₂ absorption and potential off-flavors or acid tastes if concentrations exceed 30-40% over prolonged storage, as excessive pH reduction (below 6.0) can alter texture and sensory attributes. Additionally, low-oxygen environments may favor anaerobic pathogens like Clostridium botulinum type E if temperatures rise above 3°C, necessitating strict cold chain control and abuse-temperature testing. High-oxygen initial treatments, while effective for microbial kill, can accelerate lipid oxidation in fatty species like salmon (TBARS >1.9 mg MDA/kg), reducing color stability (a* values <13 after 12 days) and limiting applicability to leaner white fish. Overall, atmosphere modification demands integration with hygiene practices and is most effective when post-treatment O₂ levels are tailored to the fish type (e.g., >30% for white fish to inhibit anaerobes, lower for fatty species to minimize oxidation).^[29]^[29]^[94]

Combined Approaches

Traditional Combinations

Traditional combinations of preservation methods have long been employed in artisanal fish processing to extend shelf life while imparting distinctive flavors and textures. One prominent example is the salting and drying of cod to produce bacalhau, a staple in Portuguese and broader European cuisine. In this process, fresh cod is heavily salted using dry salting or brining to achieve a salt concentration of 6-10% in the fish tissue, which lowers water activity and inhibits microbial growth, followed by air-drying at ambient temperatures to reduce moisture content to 45-50%. This combination yields a product stable for several months to over a year when stored in cool, dry conditions without refrigeration, allowing for long-distance trade historically.^[60]^[96] Another classic pairing is salting followed by smoking, as seen in the preparation of kippered herring. Whole or split herring are lightly brined in an 80° salometer solution for about 15 minutes to incorporate sufficient salt for initial preservation, then cold-smoked over wood at temperatures below 30°C for several hours. The wood smoke introduces phenolic compounds, such as guaiacol and syringol, which act as antimicrobials and antioxidants, further reducing water activity through surface dehydration and enhancing shelf life to weeks or months under ambient storage. This method not only preserves the fish but also develops a characteristic smoky flavor valued in British and Scandinavian traditions.^[97]^[25]^[98] Fermentation combined with salting features prominently in Asian artisanal products like pla ra, a Thai fermented fish paste. Freshwater fish are mixed with approximately 10% salt and rice bran, then fermented anaerobically in earthenware jars at 25-30°C for 1-6 months, during which lactic acid bacteria dominate to produce acidity that suppresses pathogens. The salt facilitates osmotic dehydration while the fermentation generates antimicrobial organic acids, resulting in a product with a pH of 4.5-5.5 and stability for up to a year at tropical ambient temperatures.^[99]^[100] These traditional combinations offer synergistic benefits aligned with empirical hurdle principles, where multiple stressors—such as reduced water activity from salting and drying, antimicrobial phenols from smoking, or acidity from fermentation—collectively inhibit spoilage organisms more effectively than individual methods. For instance, smoking can further decrease water activity by 0.02-0.05 units through moisture loss, complementing salt's effects. Cultural specialties like lutefisk exemplify combined approaches, where air-dried cod (stockfish) is rehydrated by soaking in a lye solution (potassium or sodium hydroxide at 1-3%) for 2-6 days, followed by neutral rinsing to gelatinize proteins for a unique texture; the preservation stability is provided by the prior drying. However, these methods enhance sensory qualities like umami and smokiness but carry risks of uneven preservation, such as localized microbial growth or texture inconsistencies, if salting, drying, or fermentation conditions are not meticulously controlled.^[101]^[102]^[103]

Hurdle Technology Applications

Hurdle technology in fish preservation employs the strategic combination of multiple sub-lethal factors to synergistically inhibit microbial proliferation and enzymatic degradation, thereby extending shelf life while maintaining product quality. These factors, including pH reduction, water activity (a_w) control, temperature management, and preservatives, act cumulatively to disrupt microbial homeostasis, deplete energy reserves, and trigger stress responses that overwhelm adaptive mechanisms without necessitating extreme conditions. For example, a typical hurdle system might integrate pH 5.0, a_w 0.95, refrigeration at 4°C, and antimicrobial preservatives to stabilize high-moisture fish products like fillets.^[102]^[104] In practice, hurdle technology finds application in diverse fish processing scenarios. For chilled ready-to-eat fish, such as gilthead seabream fillets, combining modified atmosphere packaging (MAP) with biopreservatives like nisin extends shelf life to 48 days at 0°C by suppressing Pseudomonas growth and biogenic amine formation. In canned fish preserved in brine, hurdles including thermal processing (e.g., 80°C for 10 minutes), 6% salt addition, and pH adjustment to 5.7 ensure microbial stability for 15 days at 15°C or longer at ambient conditions, reducing the need for higher heat intensities.^[102]^[105] These combinations demonstrate how hurdles can be tailored to specific product types, such as intermediate-moisture fish (a_w 0.6–0.9) stabilized via osmotic dehydration and mild acidification.^[106] Mathematical modeling enhances the predictability of hurdle effects on microbial dynamics in fish. The modified Gompertz equation, as defined by Zwietering et al. (1990), is widely used to forecast sigmoidal growth patterns under combined stresses, providing parameters for shelf-life estimation:

\log N(t) = \log N_0 + C \exp\left\{ -\exp\left[ -B (t - M) \right] \right\}

Here, \log N(t) is the log of microbial population at time t, \log N_0 is the initial log population, C = \log (N_{\max} / N_0), B \approx 2.718 \mu_{\max} (maximum specific growth rate), M = \lambda + C / \mu_{\max} (\lambda: lag phase duration). This model has been applied to predict Pseudomonas spp. growth in hurdle-treated seabream, integrating factors like temperature and a_w for accurate validation.^[107]^[108] Recent developments as of 2023 include combining hurdles with high-pressure processing and plant-based antimicrobials to enhance safety while reducing synthetic preservatives.^[4] By distributing preservation stress across multiple milder interventions, hurdle technology reduces the intensity of individual processes, such as lowering thermal exposure, which better retains nutrients like proteins and omega-3 fatty acids while preserving sensory attributes like texture and flavor. This approach minimizes quality degradation compared to aggressive single-method treatments, enhancing overall product safety and market viability.^[102]^[109]

Emerging Technologies

Non-Thermal Processing

Non-thermal processing methods in fish preservation utilize physical interventions to inactivate microorganisms, enzymes, and parasites without applying heat, thereby maintaining the raw-like texture, flavor, and nutritional profile of fish products. These technologies, with significant advancements post-2010 for methods like pulsed electric fields and cold plasma while earlier origins for high-pressure processing, address challenges in ready-to-eat seafood like sushi and smoked fish by achieving significant microbial reductions while minimizing quality degradation. High-pressure processing (HPP), pulsed electric fields (PEF), ultrasound, and cold plasma represent key innovations, often integrated as hurdles with other preservation strategies to enhance efficacy. High-pressure processing (HPP) applies isostatic pressures of 300-600 MPa for 3-5 minutes to fish products, effectively inactivating vegetative bacteria, yeasts, and enzymes through protein denaturation and membrane disruption, achieving up to a 5-log reduction in pathogens like Listeria monocytogenes and Vibrio spp. without altering the raw texture or sensory attributes. In seafood applications, HPP has been used for ready-to-eat products such as sushi-grade tuna and salmon, extending refrigerated shelf life by approximately 50% compared to untreated controls—for instance, from 7-10 days to 14-15 days—while preserving color and moisture. The U.S. Food and Drug Administration (FDA) has recognized HPP as a safe post-harvest intervention for fish since the early 2000s, particularly for reducing Vibrio risks in raw oysters and extending shelf life of processed fish to up to 30 days under refrigeration.^[110]^[111] Pulsed electric fields (PEF) deliver short bursts of high-voltage pulses (20-50 kV/cm) to fish, disrupting microbial cell membranes via electroporation, which leads to leakage and inactivation without significantly affecting proteins or overall structure. This method is particularly effective against parasites like Anisakis larvae in species such as hake, achieving near-complete inactivation at energy inputs of around 50 kJ/kg (often using lower field strengths of 1-3 kV/cm for tissue integrity), and has shown promise in preserving fish fillets by reducing bacterial loads while maintaining freshness. PEF treatments are typically applied in liquid media or directly to fillets, offering a non-thermal alternative for decontamination in minimally processed seafood. Ultrasound processing employs low-frequency sound waves (20-40 kHz) to generate cavitation bubbles in fish or surrounding media, creating mechanical shear forces that disrupt microbial cells and biofilms for surface decontamination. In fish applications, this results in 2-4 log reductions of spoilage bacteria like Pseudomonas on fillets, with minimal impact on texture when combined with water baths, enhancing hygiene during pre-processing steps like scaling or filleting. Ultrasound is valued for its ability to penetrate fish tissues superficially, aiding enzyme inactivation without heat-induced denaturation. Cold plasma, an ionized gas generated at atmospheric pressure and near-ambient temperatures, produces reactive species for surface sterilization of fish, achieving 3-log reductions in pathogens such as Salmonella and E. coli on seafood exteriors through oxidative damage to cell walls. Applied via dielectric barrier discharge setups, it effectively treats fish skins and fillets, reducing microbial contamination while preserving internal quality, and has been explored for post-harvest decontamination of whole fish or cuts. These methods collectively support sustainable fish preservation by reducing waste and enabling longer distribution chains for fresh-like products.

Intelligent Packaging and Monitoring

Intelligent packaging and monitoring systems integrate sensors and digital technologies to provide real-time data on fish quality and environmental conditions throughout the supply chain, enabling proactive preservation management and enhanced traceability. These systems go beyond passive barriers by actively responding to spoilage indicators or tracking logistics, thus minimizing risks associated with temperature abuse or contamination in perishable seafood products. Recent advancements as of 2025 include AI-integrated blockchain for predictive analytics and bio-based nanosensors for volatile compound detection, further improving efficacy.^[112]^[113] Time-temperature indicators (TTIs) are key components of these systems, designed as visual labels that change color to signal cumulative exposure to temperatures above safe thresholds, such as exceeding 4°C, which is critical for chilled fish storage to prevent microbial growth. For instance, full-history TTIs, recommended by regulatory bodies for raw seafood, monitor the integrated time-temperature history from harvest to consumption, alerting handlers to potential quality degradation without requiring specialized equipment.^[114]^[115] Colorimetric nanoparticle-based TTIs, such as those using silver nanoparticles, maintain stability at 4°C but exhibit visible shifts under abuse conditions, facilitating immediate decision-making in distribution.^[116] Supply chain tracking technologies like radio-frequency identification (RFID) tags combined with blockchain enhance transparency and combat fraud in fish provenance, particularly for high-value species such as tuna. Platforms like IBM Food Trust utilize blockchain to record immutable data from catch to retail, allowing verification of origin and handling to reduce mislabeling and illegal practices that affect up to 30% of seafood transactions in some markets.^[117]^[118] Active monitoring systems include pH-sensitive films that detect spoilage through color changes triggered by rising pH levels in fish tissue, often shifting from red or purple to yellow-green as basic compounds accumulate. These films are particularly useful for indicating histamine levels exceeding 50 mg/kg, a threshold signaling potential scombroid poisoning risk in species like tuna and mackerel.^[119]^[120] Nanosensors, such as those based on MXene materials, offer high sensitivity for detecting volatile amines like trimethylamine produced during bacterial decomposition, enabling early spoilage alerts at concentrations below detectable limits of traditional methods.^[121]^[122] In practical applications, Internet of Things (IoT)-enabled cold chains integrate sensors for continuous monitoring of temperature and humidity in seafood shipments, with post-2015 advancements supporting regulatory compliance across major markets. For example, EU-funded initiatives like SeafoodTrace employ IoT platforms to ensure end-to-end traceability, covering a significant portion of imports and reducing disruptions in logistics.^[123]^[124] Artificial intelligence (AI) predictive analytics further refines these systems by modeling shelf-life based on real-time sensor data, forecasting remaining viable storage for fish under varying conditions with accuracies exceeding 90% in multi-species validations.^[125]^[126] These technologies collectively yield substantial benefits, including up to 20% reductions in seafood waste through timely interventions and strengthened adherence to Hazard Analysis and Critical Control Points (HACCP) protocols by providing verifiable records of preservation conditions.^[127]^[128]

Sustainability and Challenges

Environmental Impacts

Fish preservation methods, including freezing, canning, smoking, and drying, contribute to environmental degradation through high energy demands, waste generation, and resource depletion in supply chains. These processes often rely on fossil fuel-based energy sources, leading to significant greenhouse gas emissions within the broader fisheries sector. For instance, post-harvest activities such as freezing and cold storage account for a substantial portion of energy use, exacerbating climate impacts. Additionally, waste effluents and packaging materials pollute aquatic ecosystems, while the production of preserved aquaculture products strains wild fish stocks used in feeds.^[129]^[130] Energy consumption in traditional preservation techniques like freezing and canning represents a major environmental burden, with freezing alone requiring approximately 38% of total energy inputs in many fishery operations. This energy intensity translates to notable emissions, as processing stages in the fish value chain can contribute up to 71% of total energy use in frozen fish supply chains.^[129]^[131] Waste from preservation processes poses risks to ecosystems, particularly through brine effluents generated in traditional salting and drying methods. These effluents, characterized by high salinity levels, increase the salt content in discharged waters, which can disrupt marine and freshwater habitats by altering osmotic balances and harming benthic organisms. Plastic packaging used for frozen or canned fish further compounds ocean pollution, with food packaging—including seafood materials—contributing to the annual influx of over 8 million tonnes of mismanaged plastic waste into marine environments. This debris persists, entangling wildlife and entering food chains, amplifying long-term ecological damage.^[132]^[133] The resource demands of preserved aquaculture-derived fish exacerbate pressure on wild stocks, as feeds often incorporate fishmeal from capture fisheries, leading to overfishing and biodiversity loss. This over-reliance sustains an unsustainable cycle where a significant portion of the environmental impact in salmon farming stems from feed production. Sustainable alternatives, such as algae-based biopreservatives derived from macroalgae extracts, mitigate this by providing natural antimicrobial coatings that extend shelf life without relying on wild-sourced ingredients, thereby reducing the overall ecological footprint of preservation. These algae compounds inhibit microbial growth in fish products while supporting circular practices that lessen dependence on marine resources.^[134]^[135]^[136] Key metrics highlight the scale of these impacts; for example, the carbon footprint of farmed fish is around 5 kg CO₂e per kg of product, driven by processing energy and supply chain factors. Circular economy approaches, such as converting fish waste from preservation into biogas via anaerobic digestion, offer mitigation by recovering energy and nutrients, potentially reducing waste emissions and promoting resource recovery in the sector. These strategies align with broader sustainability goals, minimizing the net environmental load of fish preservation. As of 2025, initiatives like the EU's Common Fisheries Policy updates emphasize low-carbon technologies and reduced plastic use in seafood packaging to address ongoing challenges.^[137]^[138]^[139]

Regulatory and Quality Standards

Regulatory frameworks for fish preservation encompass international, regional, and national standards aimed at ensuring food safety, preventing spoilage, and maintaining quality throughout processing, storage, and distribution. The Codex Alimentarius Commission, a joint FAO/WHO body, establishes voluntary international standards that serve as benchmarks for preserved fish products, including guidelines on hygiene, composition, and contaminants.^[140] In the United States, the Food and Drug Administration (FDA) mandates the Hazard Analysis and Critical Control Points (HACCP) system for fish and fishery products under the Federal Food, Drug, and Cosmetic Act, requiring processors to identify hazards such as histamine formation, Clostridium botulinum toxin, and pathogens, and implement controls specific to preservation methods. For frozen fish, FDA requires rapid freezing to a core temperature of -18°C or below to inhibit microbial growth and enzyme activity, with ongoing monitoring to prevent thawing and refreezing during storage and transport. In canning, thermal processing must achieve a scheduled heat treatment validated to reduce pathogens like C. botulinum to safe levels, typically targeting a 12D reduction in spores, while maintaining product quality. Smoking processes, particularly cold-smoking, demand strict time-temperature controls (e.g., below 3°C during brining and smoking) to limit Listeria monocytogenes growth, combined with post-process refrigeration. The European Union enforces hygiene rules through Regulation (EC) No 852/2004 on food hygiene and Regulation (EC) No 853/2004 laying down specific requirements for fishery products, emphasizing prevention of contamination from harvest to consumption. Chilled fresh fish must reach a core temperature of no more than 0°C for whole fish or 2°C for gutted fish immediately after capture or processing, with continuous refrigeration at 0-4°C to preserve sensory quality and safety. Freezing must occur at -18°C or lower for products requiring parasite destruction, such as certain wild-caught species, unless from approved aquaculture sources. For smoked fishery products, EU standards align with Codex guidelines, mandating controls on wood smoke contaminants like polycyclic aromatic hydrocarbons (PAHs) limited to 2 µg/kg for benzopyrene, and ensuring rapid chilling post-smoking to below 4°C. Canned fish must undergo heat sterilization in hermetically sealed containers, with establishments approved for compliance with microbial and chemical safety criteria.^[141] Quality standards focus on sensory attributes, nutritional integrity, and contaminant limits to ensure consumer safety and market viability. Internationally, Codex standards for quick-frozen fish fillets (CXS 190-1995) specify organoleptic requirements, such as no excessive discoloration or dehydration. Total volatile basic nitrogen (TVB-N) levels, used as a freshness indicator, are limited to around 30-35 mg/100g in related guidelines for certain fish products. In the EU, maximum levels for histamine in preserved fish are set at 100-200 mg/kg depending on the product, with rapid testing methods required at critical points. FDA aligns with these by monitoring decomposition indicators in preserved products, rejecting lots exceeding sensory defect thresholds like strong off-odors in smoked fish. These standards collectively prioritize multi-barrier approaches, including pH control in fermented or pickled fish (below 4.6 to inhibit botulism), to uphold both safety and quality without compromising nutritional value.^[142]

References

[1]
Processing & Storage | Food Loss and Waste in Fish Value Chains
Smoking, sun drying, and salting are common traditional processing methods associated with small-scale fisheries value chains.
[2]
5. fish processing
FISH PROCESSING. The preservation of fish by canning began in the early part of the last century. By 1900 it was a well established industry.
[3]
Freezing | Food Loss and Waste in Fish Value Chains
The main freezing methods used are blast freezing, plate freezing, immersion or spray freezing. Advantages of freezing include: flesh is changed very little and ...
[4]
Innovative Preservation Methods Improving the Quality and Safety of ...
Nov 18, 2021 · The present review aims to describe the primary mechanisms of some of these innovative methods applied to preserve quality and safety of fish ...Missing: authoritative | Show results with:authoritative
[5]
https://www.fao.org/in-action/globefish/news-events/news/news-detail/world-fish-trade-fall-in-2024/en
[6]
Cured Fish or Processed Fish: Which Term is More Accurate?
Dec 2, 2024 · In ancient Egypt and Mesopotamia, around 3000 BC, fish was primarily preserved with salt. In China, around 1000 BC, historical documents record ...
[7]
Cooking and Preserving Fish - KnowBC
They relied on drying and smoking to preserve their fish, and enjoyed the added flavour that smoking gave. Smoke houses, some quite large, were a vital part of ...
[8]
Ancient DNA reveals the Arctic origin of Viking Age cod from ... - PNAS
We genetically trace the ancestry of Viking Age fish from mainland Europe to the North East Arctic cod population that supports the modern Lofoten fisheries.
[9]
[PDF] Chinese Fish Culture. History and Development, - DTIC
Jun 6, 2023 · Fish smoking is also recorded in early Chinese history. The method of smoking is much the same as it is practiced today. Now a word about the ...
[10]
Garum - Sir Thomas Browne
The fermented fish sauce that the Romans called garum derived from garos (garon), a small but otherwise unknown species of fish originally used by the ...
[11]
Salt and Fish Processing in the Ancient Mediterranean: A Brief Survey
Nov 15, 2018 · Salt only was able to transform fish - which is otherwise extremely perishable - into a durable commodity, easy to store and trade. The ...
[12]
[PDF] An innovative way of fish drying and smoking: FAO Thiaroye ...
In addition, drying in the open air exposes the product to contamination by wind, dust, insects, rodents and birds. 4. Limitations of traditional smoking and.<|control11|><|separator|>
[13]
[PDF] Curing and Canning of Fishery Products: A History
The drying and smoking of fish are ancient processes. Archaeologists and anthropologists tell us that drying and smoking were probably developed short ly after ...
[14]
How Did We Can? | Canning Timeline Table
1795. Napoleon offers a reward of 12 thousand francs for the invention of a new food preservation method · 1809. Nicolas Appert wins Napoleon's reward · 1810
[15]
The History of Ammonia Refrgeration - IIAR
Ammonia was first used as a refrigerant in the 1850s in France and was applied in the United States in the 1860s for artificial ice production.
[16]
7.8 Some Like It Cold: A History of Your Fridge
Jun 23, 2022 · The 1850s saw the first refrigerated rail cars bringing meat and produce out of the great American interior to the eager and booming eastern ...
[17]
1924 – 2024: Celebrating 100 years of the frozen food industry
Feb 26, 2024 · After years of experimenting on quick-freezing, Clarence Birdseye patented the first apparatus for freezing and packaging fish in 1924, the ...
[18]
Birth of a Frozen Food Nation - Los Angeles Times
Jan 24, 2001 · Through the late 1920s, Birdseye continued to tinker with various freezing methods (for produce as well as fish) and reestablished the business, ...
[19]
Vacuum Packaging - an overview | ScienceDirect Topics
Vacuum packaging was invented in the 1950s by a German inventor named Karl Busch, who used the discovery for vacuum packaging meat products. Today, vacuum ...
[20]
FISH IRRADIATION TO AID INDUSTRY; Atomic Pasteurization Now ...
Under contract to the United States Atomic Energy Commission, research on radiopasteurization of seafoods has been under way since 1960 at the technical ...
[21]
[PDF] Investigating Global Aquatic Food Loss and Waste
As global aquaculture continues to grow, new technologies and production strategies will underscore the future of enhanced production efficiency, reduced losses ...
[22]
[PDF] SURIMI - the NOAA Institutional Repository
Jan 1, 1986 · JAPANESE SURIMI INDUSTRY. A. DOMESTIC PRODUCTION. The history of frozen surimi production in Japan from 1960 to 1984 is illustrated in Figure ...
[23]
Smoked Fish - an overview | ScienceDirect Topics
West African smoked fish has assumed a level of importance on international trade, particularly to the United Kingdom and North America. This is a result of ...
[24]
[PDF] Open Shelf-Life Dating of Food (Part 12 of 16) - Princeton University
The Q10 values of from 4 to 6 indicate the importance of keeping fish properly chilled, since a small change in temperature has a drastic ef- fect on an already ...
[25]
Water Activity (aw) in Foods - FDA
Aug 27, 2014 · The heat is generally necessary at a w levels above 0.85 to destroy vegetative cells of microorganisms of public health significance (e.g., ...
[26]
Lactic Acid Bacteria and Their Bacteriocins: A Promising Approach ...
If the product has insufficient salt, or fails to achieve a rapid pH drop to below 4.5, C. botulinum can grow. There was no evidence that the fish had been ...
[27]
Modified Atmosphere Systems and Shelf Life Extension of Fish ... - NIH
The reduction of oxygen slows down lipid oxidation and the development of rancidity.
[28]
Review Basic aspects of food preservation by hurdle technology
Hurdle technology is used in industrialized as well as in developing countries for the gentle but effective preservation of foods.
[29]
Frozen Fish - an overview | ScienceDirect Topics
Although freezing is effective at inhibiting enzymes, enzymes in the fish muscle are still active at − 17 °C. Therefore, temperatures below − 20 °C are ...Missing: halts | Show results with:halts
[30]
Quality Changes on Cod Fish (Gadus morhua) during Desalting ...
Sep 13, 2024 · This process is used to preserve several fish products by lowering their water activity (between 0.70 and 0.75), leading to an inhibition of ...
[31]
[PDF] Methods to determine the freshness of fish in research and industry
The extent of ATP-degradation is expressed as the K-value.ln fresh fish the K-value is low. The K-value is a reliable freshness indicator for frozen and smoked ...
[32]
1. Introduction
Although ice can preserve fish for some time, it is still a relatively short-term means of preservation when compared to freezing, canning, salting or drying, ...
[33]
Fresh Fish Degradation and Advances in Preservation Using ... - NIH
Apr 5, 2021 · 1.1. High autolytic activity of the major muscle endogenous proteases causes the hydrolysis of key myofibrillar proteins, contributing to the ...
[34]
4. The use of ice and chilled seawater on fishing vessels
In tropical conditions, this would also require that fish be kept in the shade and out of direct sunlight. Where it is not possible to ice fish immediately, wet ...
[35]
2. The manufacture of ice
The resulting mixture of ice and water (slush ice) can be pumped from the storage tanks through piping or hoses to the fish-chilling area or directly to an ...
[36]
(PDF) Refrigerated Sea Water (RSW) For Handling of Fish Catches
On the other hand, there is refrigerated sea water (RSW) as a cooling technology that uses a mechanical refrigeration system to preserve the fish.
[37]
The use of the so‐called 'superchilling' technique for the transport of ...
Jan 28, 2021 · Superchilling entails lowering the fish temperature to between the initial freezing point of the fish and about 1–2°C lower.
[38]
Research Progress on Nutritional Value, Preservation and ... - MDPI
Super-chilling extends the shelf life of fish at least 1.4–5 times that make it a more promising technique than most traditional methods [57].
[39]
Effects of newer slurry ice systems on the quality of aquatic food ...
As outlined above, flake-ice is a preservation method extensively used to remove heat rapidly from aquatic food products and to extend their shelf life. Flake- ...
[40]
Quality Assessment of Chilled and Frozen Fish—Mini Review - PMC
Nov 25, 2020 · In most studies, whole chilled and frozen fish present longer shelf-life than those preserved as gutted and filleted. However, it should be ...
[41]
[PDF] Fish and Fishery Products Hazards and Controls Guidance - FDA
Failure to chill onboard may permit bacteria and enzymes, including those that form scombrotoxin (histamine), to increase unnecessarily.
[42]
Freezing and refrigerated storage in fisheries - 2. Influence of ...
What must be remembered is that even quick freezing results in quality changes in the fish and double freezing will therefore result in further changes. Only ...
[43]
Understanding the Process of Freezing
### Summary of Slow vs Rapid Freezing Effects on Fish/Food Quality
[44]
IQF: The Effectiveness of Fast Freezing in Food Production | AFE
Jul 17, 2024 · IQF is a rapid freezing method where food items are rapidly frozen individually at extremely low temperatures, typically between -30°F to -40°F.
[45]
Effect of Liquid Nitrogen Freezing Temperature on the Muscle ...
Dec 13, 2023 · The results showed that better muscle quality was maintained after LNF treatment compared to that after air blast freezing (AF) treatment.
[46]
Effect of Freezing on the Shelf Life of Salmon - PMC - NIH
Several researchers showed that freezing even in the short term changed physical properties such as weight loss, color, and texture of the Atlantic salmon and ...
[47]
[PDF] The Effect of Water Activity on Preservation Quality of Fish, a ... - idosi
Water activity (aw) is key for fish preservation; reducing aw to 0.6 prevents bacteria and mold growth, and is a measure of dryness.
[48]
A Comprehensive Review on the Processing of Dried Fish and the ...
Sep 20, 2022 · ... drying, which exposes the fish to contaminants and unpredictable humidity changes in the environment. Hence, it would be difficult to make ...
[49]
Development and Quality Analysis of a Direct Solar Dryer for Fish
The moisture content of the dried samples was 13.97% for catfish and 13.35% for tilapia fish during dry season and during the wet season it was 15.68% for ...
[50]
Artisanal Fish Drying | Food Loss and Waste in Fish Value Chains
Artisanal processing is associated with small-scale fisheries, and leverages methods such as sun drying, salting, fermenting, and smoking and frying, ...
[51]
Recent Advances in Drying Processing Technologies for Aquatic ...
May 6, 2024 · High temperatures can cause denaturation and deformation of muscle proteins, leading to surface hardening. Therefore, the differences in drying ...
[52]
A Tale of Freeze-Drying Fish - AgResearch Magazine - USDA
A new method that produces freeze-dried salmon cubes could be used to make tasty snacks, salad toppings, and ready-to-eat soups.
[53]
How to freeze-dry food at home | UMN Extension
... vacuum pump system. Sublimation can remove up to 90 percent of the water content from a food, but the mild heat temperature is not sufficient to inactivate ...Missing: fish | Show results with:fish
[54]
Critical Moisture Content of Dehydrated Stockfish - Nature
Investigations conducted in this Laboratory into the dehydration of stockfish (Merluccius capensis) have indicated that the moisture content of the dried ...
[55]
Flavorful Fish Jerky Recipe: Healthy & Protein-Packed Snack
8 hrTo make fish jerky, marinate thinly sliced salmon or tuna in soy sauce, citrus, and spices, then dehydrate at 145°F (63°C) for 6–8 hours until chewy. Store in ...Table Of Contents · Flavorful Fish Jerky Recipe · How To Store Fish Jerky For...
[56]
Drying - Fisheries :: Home
Salted fish will take up moisture from the surrounding air if the relative humidity rises above 75 per cent. It may, therefore, be necessary to remove the fish ...
[57]
Dried fish provide widespread access to critical nutrients across Africa
After correcting dried fish nutrient concentrations for this water loss, we found that drying degraded vitamins and omega-3 fatty acids (40 to 80% decrease ...
[58]
Fish salting 101: What you need to know
Jun 29, 2021 · Salting, or salt curing, is one of the oldest methods of fish preservation used by the Romans to produce the famous salt cod, or bacalao.
[59]
All you need to know about salting fish - Nofima
Dec 15, 2021 · After it has been dried to become klippfisk, the salt content is around 19–20%, whereas the water content has been reduced to between 50–53%.
[60]
[PDF] Pickling Fish and Other Aquatic Foods for Home Use - USDA NIFA
From a practical standpoint, this acid level is attained when the pickle solution contains one or more parts of 5% vinegar to one part water.Missing: 3.5-4.0 | Show results with:3.5-4.0
[61]
Cured Salmon Gravlax (crazy easy!) - RecipeTin Eats
Rating 5.0 (71) · 10 minApr 7, 2017 · Equal parts salt + sugar (combined) 50% of the weight of the salmon. Coat, leave 24 hours for lightly cured, 36 hours for medium (this is what I ...Salmon Gravlax Formula · Difference Between Gravlax... · Salmon Gravlax Faq
[62]
[PDF] Fish and Fishery Products Hazards and Controls Guidance - FDA
Controlling the amount of moisture that is available in the product (water activity) to 0.85 or below by drying, to prevent growth and toxin formation by C. ...Missing: 0.75 | Show results with:0.75
[63]
Clostridium botulinum - an overview | ScienceDirect Topics
Smoke-dried fish with a water activity of 0.75 or below (moisture content of 10%) inhibits the growth of all foodborne pathogens including C. botulinum and ...
[64]
[PDF] Nitrite Additives- Harmful or Necessary? - Scientific Publications Office
Nitrites are used for color, flavor, and preventing botulism, but are suspected carcinogens. The question is if they are necessary for safety.
[65]
Pasteurization - an overview | ScienceDirect Topics
Pasteurization is a method in which the microorganisms are killed by heat treatment, and usually involves the application of temperature below 100°C. The ...
[66]
[PDF] Pasteurized Fish and Fishery Products Potential Food Safety Hazard
Table #A-3 provides 6D process times for a range of pasteurization temperatures, with L. monocytogenes as the target pathogen. Lower degrees of destruction may ...
[67]
[PDF] Fish and Fishery Products Hazards and Controls Guidance - FDA
In addition to eliminating bacterial pathogens, cooking and pasteurization also greatly reduce the number of spoilage bacteria present in the fishery product. ...
[68]
Food Safety Objective Approach for Controlling Clostridium ...
Nov 1, 2011 · The Fo value required for canned food products is equivalent to 12-decimal reductions of proteolytic C. botulinum spores. Using the highest ...
[69]
Understanding retort processing: A review - PMC - NIH
Dec 27, 2023 · Exceeds 100°C, often 115–130°C; specific time–temperature combinations, e.g., 121.1°C for 3 min for a 12D reduction of Clostridium botulinum ...
[70]
Application of UV-C light to improve safety and overall quality of fish
All microbial groups were reduced as UV-C dose increased. Low (0.05–0.16 J/cm2) and high (0.30–0.79 J/cm2) doses decreased the bacterial ...
[71]
Combined UV-C Technologies to Improve Safety and Quality of Fish ...
May 11, 2023 · For fish, the most effective treatments to reduce Gram-negative and Gram-positive bacteria were UV-C at 0.5 J/cm2 + non-thermal atmospheric ...
[72]
Intense pulsed light (IPL) and UV-C treatments for inactivating ...
The inactivation effects of intense pulsed light (IPL) on Listeria monocytogenes surface-inoculated on solid medium and on seafoods such as flatfish, salmon, ...
[73]
Canned Tuna - Food Source Information
The recommended shelf life for canned tuna is 2–5 years, as long as the can is in good condition. Damaged or swollen cans of tuna could indicate that the ...
[74]
Optimizing the sterilization process of canned yellowfin tuna through ...
This research suggests that sterilization of canned tuna is recommended to be done at 121°C for 20 minutes with regards to the nutritional content of the final ...Missing: 12D | Show results with:12D
[75]
UV disinfection food treatment conveyor - IPE
Oct 15, 2019 · The new UV disinfection conveyor uses UV tunnels to achieve 360° of UVC irradiation, whilst a built-in, custom-designed reflector maximises UVC ...
[76]
Overview of Irradiation of Food and Packaging - FDA
Jan 4, 2018 · Irradiation can be an effective means of eliminating and/or reducing microbial and insect infestations along with the foodborne diseases they induce.Missing: trials | Show results with:trials
[77]
Effects of five thermal processing methods on the physicochemical ...
Aug 15, 2024 · The results found that heat treatments reduced the moisture content, total sulfhydryl content, redness, hardness and chewiness of fish meat, ...Missing: gelatinization drawbacks
[78]
Heat‐induced structural changes in fish muscle collagen related to ...
Denaturation of fish collagen occurs between 15 and 45°C, which probably involves the breakage of hydrogen bonds, resulting in loss of fibrillar structure ...Missing: drawbacks | Show results with:drawbacks
[79]
[PDF] Irradiation of fish shellfish and frog legs
This publication contains the most up to date data on irradiation of fish, shellfish and frog legs. It is intended to assist governments in considering the ...
[80]
The Use of Irradiation for Food Quality and Safety - IFST
Irradiation can reduce the risk of food poisoning, control food spoilage and extend the shelf-life of foods without detriment to health.Missing: 1960s | Show results with:1960s
[81]
the use of chemical additives for fisheries product preservation
Aug 7, 2025 · The extensive use of sorbates as preservatives is based on their ability to inhibit or delay growth of numerous microorganisms, including yeasts ...
[82]
Seafood biopreservation by lactic acid bacteria – A review
### Summary of Lactic Acid Bacteria in Seafood Biopreservation
[83]
Review on Natural Preservatives for Extending Fish Shelf Life - MDPI
Plant-derived antimicrobials could prolong fish shelf life and decrease lipid oxidation. Animal-derived antimicrobials also have good antimicrobial activities; ...
[84]
[PDF] A review on fish sauce processing, free amino acids and peptides ...
Aug 31, 2022 · It is left to ferment for 16 to 18 months, supernatant acquired after the fermentation is the Nuoc-mam (Beddows, 1985; ... Lactic acid bacteria in ...
[85]
Oregano Essential Oil-Pectin Edible Films on Shelf-Life Extension of ...
Mar 8, 2022 · The aim of this research was to determine the effects of pectin (P) combined with oregano essential oil (OEO) on the shelf-life extension of large yellow ...
[86]
[PDF] Commission Regulation (EU) 2023/2108 of 6 October ... - EUR-Lex
Oct 6, 2023 · This regulation amends Annex II of Regulation (EC) No 1333/2008 regarding food additives, specifically nitrites (E 249-250) and nitrates (E 251 ...
[87]
Antimicrobial Impacts of Microbial Metabolites on Fish Preservation
Apr 3, 2022 · The growth of microorganisms and their metabolism is a major cause of fish spoilage as they produce biogenic amines such as putrescine, ...
[88]
[PDF] A review on advanced packaging technology for fish and fishery ...
Dec 6, 2024 · This overview delves into the evolving landscape of seafood packaging innovation, focusing on its role in extending shelf life, preserving ...
[89]
Packaging interventions in low temperature preservation of fish-a ...
Feb 10, 2016 · Active packaging technologies are most effective packaging interventions in improving shelf life of fish. Introduction. Consumption of fish is ...Introduction · Spoilage Of Fish · Fish Preservation
[90]
Addition of Silver Nanoparticles to Composite Edible Films and ...
Nov 28, 2023 · According to the results, the AgNP addition led to very high antimicrobial activity of both films, reducing by more than 96% the microbial ...
[91]
Current Practice and Innovations in Fish Packaging
Oct 25, 2018 · Recent innovations include the combined application of MAP with other preservative factors, such as minimal processing or the addition of ...Missing: preservation | Show results with:preservation
[92]
[PDF] High Oxygen as an additional factor in Food Preservation
In this thesis, the efficacy of high oxygen as an additional hurdle for food preservation is studied. At high oxygen conditions and at low temperature, ...
[93]
Modified Atmosphere Packaging (MAP) - NIPPON GASES
Packing within a modified atmosphere provides a prolonged shelf life for seafood products. ... Smoked salmon. 35 days. We are here to help. Contact us. At ...
[94]
Shelf life of packaged loins of dried salt-cured cod (Gadus morhua L.) stored at elevated temperatures
### Summary of Shelf Life, Salt Levels, and Drying Process of Dried Salt-Cured Cod
[95]
Kippers
A kipper is a fat herring with guts and gills removed, split down the back from head to tail, lightly brined, dyed if desired, and cold smoked.Missing: phenols preservation
[96]
A Risk–Benefit Analysis of First Nation's Traditional Smoked Fish ...
Dec 26, 2022 · Curing fish using cold or hot smoke methods ultimately reduces the moisture content and, most importantly, water activity. Thus, the lower ...
[97]
[PDF] Importance of salt concentration and long-term fermentation in the ...
For the preparation, raw fish is mixed with salt and rice bran or roasted rice powder, and then fermented at tropical temperatures for at least 6 months. It is ...Missing: process | Show results with:process
[98]
(PDF) Fermented fish product (Pla-ra) from marine ... - ResearchGate
Aug 7, 2025 · Pla ra (fermented fish) is made from locally procured ingredients: locally caught fish, locally made salt, and locally grown and milled rice.
[99]
Preservation by Curing (Drying, Salting and Smoking) | Request PDF
Salting, drying and smoking in combination is one of the oldest methods of food preservation ( Horner, 1997 ). The process extends storage stability, enhances ...
[100]
Hurdle technology for fish preservation - ScienceDirect.com
At pH 5.0 or below, microbial growth-except for desirable strains such as Lactobacillus, is inhibited. High moisture fish products are minimally processed fresh ...Missing: threshold | Show results with:threshold
[101]
“The Great Lutefisk Mystery,” solved - The Norwegian American
Dec 16, 2016 · Lutefisk is made by soaking dried stockfish in lye, which reconstitutes the fish and breaks down protein for easier digestion.<|separator|>
[102]
https://www.sciencedirect.com/science/article/pii/S2468550X20300186
[103]
Preservation of Seafoods by Hurdle Technology - IntechOpen
A combination of hurdle such as high temperature, refrigeration, irradiation, drying and smoking etc. are applied to eliminate the growth of microorganism. The ...
[104]
https://doi.org/10.1016/0924-2244(95)93674-2
[105]
https://www.intechopen.com/chapters/75399
[106]
Recent Progress in Intelligent Packaging for Seafood and Meat ...
Apr 8, 2024 · This article reviews the design principles and recent advances in intelligent packaging for real-time quality monitoring of seafood and meat ...
[107]
[PDF] Time-Temperature Indicators For some seafood products ... - FDA
This video discusses how you can use TTIs with raw seafood products, focusing on TTIs that are considered to be full history indicators. Full history TTIs ...
[108]
Application of Time-Temperature Indicators and ... - VCE Publications
Jan 29, 2025 · TTIs are devices or smart labels that visually show when the thermal history of a seafood product has reached a specific level of time-temperature exposure.Missing: preservation | Show results with:preservation
[109]
Colorimetric Nanoparticle-Based Time–Temperature Indicators (TTIs ...
The TTIs operate through three colorimetric mechanisms: NP concentration, geometry changes, and agglomeration. At 4 °C, AgNPs and AgTNPs maintained stable color ...
[110]
Sustainable Seafood Gets a Boost from IBM Blockchain Technology ...
Jun 25, 2020 · ... fish came from, how it was grown or how it was stored. This creates the potential for fraud and food waste. Blockchain can help eliminate ...
[111]
Something's 'Fishy' On The Blockchain, But Can This Tech Reduce ...
Aug 3, 2018 · ... Blockchain, But Can This Tech Reduce Seafood Fraud? ... However, there are many species of fish that have a much higher percentage of fraud.
[112]
Optical sensors for determination of biogenic amines in food
May 8, 2020 · A concentration of histamine of less than 50 mg/kg indicates good-quality fresh food. Concentrations of histamine between 50 and 200 mg/kg ...
[113]
Intelligent pH indicator films containing anthocyanins extracted from ...
Sep 7, 2020 · Fish spoilage leads to an increase in the pH value of the fish. A colorimetric pH indicator can be used to monitor fish spoilage and has been ...
[114]
Density Functional Theory Studies of MXene-Based Nanosensors ...
Sep 29, 2023 · We strongly believe that our findings will pave the way for the development of highly sensitive nanosensors for monitoring the spoilage of meat and fish ...
[115]
Fish spoilage assessment through detection of volatile amines using ...
Sep 19, 2025 · DFT investigations of nanosensors based on MXene for the detection of volatile organic compounds such as MA, DMA, and TMA in meat spoilage ...
[116]
SeafoodTrace: Intelligent Traceability Platform enabling ... - CORDIS
Aug 10, 2022 · In this context, the EU-funded SeafoodTrace project will develop an intelligent platform to create a one-stop shop that offers traceability, ...Missing: cold 95%
[117]
Internet of Things enabled real time cold chain monitoring in a ...
May 5, 2022 · An IoT-enabled Cold Chain Logistics system has been proposed that provides real-time monitoring of products in containers at ports.Missing: EU | Show results with:EU
[118]
Development of machine learning-based shelf-life prediction models ...
Aug 30, 2024 · A multi-objective model that can simultaneously predict the shelf-life of five marine fish species at multiple storage temperatures using 14 features.
[119]
Artificial Intelligence Tools for Processing and Quality Detection of ...
Jun 27, 2025 · AI models can predict the shelf-life of fish products by analyzing various physicochemical parameters along with environmental factors like ...<|separator|>
[120]
Application of Interactive and Intelligent Packaging for Fresh Fish ...
Jun 20, 2021 · This work deals with a combination of frontline food sciences, smart and interactive packaging that are applicable for future production of nutrition packages.
[121]
Guidance for Industry: Questions and Answers on HACCP ... - FDA
Nov 30, 2018 · FDA has developed "HACCP Regulation for Fish and Fishery Products: Questions and Answers" to provide answers to some of the more common questions.
[122]
[PDF] Fuel and energy use in the fisheries sector
... energy use for different functions was observed, with, on average, freezing requiring 38 percent of total energy input, cold storage. 16 percent, ice making ...
[123]
Energy and water consumption pattern in seafood processing ...
Of the total seafood production in the world, only 45% is consumed in the form of fresh fish and the remaining 55% is processed and consumed as frozen fish (29 ...
[124]
A study of energy use and associated greenhouse gas emissions in ...
... total energy use in stockfish value chains, and 71% of total energy use in frozen fish value chains. While this study does not consider the whole life cycle ...
[125]
[PDF] Sustainability Advantages of High Pressure Food Processing
Compared to thermal pasteurization by autoclave of a fish and vegetable ready-to-eat meal with 60-day shelf life, in a comparative limited life cycle assessment ...
[126]
Seafood industry effluents: Environmental hazards, treatment and ...
A LCA based study on the environmental impacts showed that fish processing contributed to 0.079 kg SO2- eq (equivalent) acidification, 9.66 kg CO2-eq. climate ...
[127]
Exploring the environmental impacts of plastic packaging
Nov 15, 2024 · Annually, 8.3 million tonnes of mismanaged plastic waste enter oceans, prompting the food packaging industry, a major contributor, ...
[128]
Limit wild fish use in aquaculture | Seafood basics
The use of wild fish as feed to produce aquaculture's harvest can have wide-ranging environmental impacts.Missing: products | Show results with:products
[129]
Aquafeed - WWF-UK
Salmon feed can account for up to 90% of the environmental impact of production and is also linked to social and welfare issues. Salmon feed is therefore a key ...
[130]
Review on Natural Preservatives for Extending Fish Shelf Life - NIH
Oct 13, 2019 · Natural preservatives from microorganisms, plants, and animals have been shown potential in replacing the chemical antimicrobials.
[131]
The Carbon Footprint of Food | Climateq
- 60kg CO2e per kg. Cheese - 21kg CO2e per kg. Poultry - 6kg CO2e per kg. Fish (Farmed) - 5kg CO2e per kg. Bananas - 0.7kg CO2e per kg. Nuts - 0.3kg CO2e per kg.
[132]
Fish Waste: From Problem to Valuable Resource - PMC - NIH
In this review, the authors discuss about how circular bioeconomy can be achieved through sustainable fish waste management, examining the global situations of ...
[133]
Standards | CODEXALIMENTARIUS FAO-WHO
Standard for Pomegranate, CCFFV, 2013. CXS 311-2013, Standard for Smoked Fish, Smoke-Flavoured Fish and Smoke-Dried Fish, CCFFP, 2024. CXS 312-2013, Standard ...
[134]
https://www.seafoodwatch.org/seafood-basics/sustainable-solutions/limit-wild-fish-use-as-feed
[135]
https://www.wwf.org.uk/what-we-do/aquaculture/aquafeed