# Salmon Farming Systems: From Hatchery to Harvest ## Key Takeaways - **Hatchery operations demand stringent water quality control**, with dissolved oxygen above 6 mg/L, pH between 6.5-8.0, and ammonia below 0.02 mg/L unionized to prevent fungal infections, deformities, and poor yolk absorption. Optimal growth in Recirculating Aquaculture Systems (RAS) for Atlantic salmon parr has been observed around 14°C, balancing growth rate with stress indicators. - **Smoltification, a critical freshwater-to-seawater transition, is managed via photoperiod manipulation and temperature control**, with gill Na+/K+-ATPase activity serving as a key indicator of readiness. Gill lesions, often linked to poor RAS water quality, significantly impair respiratory capacity and disease resistance. - **Sea cage grow-out necessitates meticulous sea lice management**, employing strategies like cleaner fish, chemical treatments, and mechanical delousing, with weekly monitoring during warmer months to prevent skin damage and secondary infections. Storm damage and algal blooms pose significant risks to infrastructure and fish survival. - **Disease prevention hinges on robust biosecurity protocols**, including equipment disinfection and certified disease-free stock, complemented by vaccination against common bacterial and viral pathogens. Escalation criteria for professional veterinary consultation are triggered by mortality exceeding 0.1% for three consecutive days or the appearance of unusual systemic clinical signs. - **Humane harvest procedures involve pre-harvest starvation (3-7 days) to empty the gut**, followed by electrical or percussive stunning, and meticulous bleeding to ensure optimal fillet quality and shelf-life. Delayed chilling post-harvest significantly accelerates bacterial growth and enzymatic degradation, compromising quality. - **Environmental stewardship in salmon farming involves waste management through site rotation, fallowing, and integrated multi-trophic aquaculture (IMTA)**, which has demonstrated nutrient connectivity between salmon and kelp, mitigating benthic impacts. Welfare is assessed via mortality rates, feeding behavior, and absence of injuries, with regulatory compliance covering water quality, disease, and food safety. --- Salmon farming is a controlled production cycle that begins with eggs in a hatchery and ends with harvest-ready fish at market weight. This article covers the full production sequence for Atlantic salmon (Salmo salar) and related species, including hatchery operations, smolt production, sea cage grow-out, feeding strategies, health management, and harvest procedures. The intended readers are salmon farmers and aquaculture investors who need practical management guidance grounded in current scientific evidence. ## At a Glance | Production Stage | Typical Duration | Key Management Focus | Common Risks | |------------------|------------------|----------------------|--------------| | Hatchery (eggs to fry) | 2-4 months | Water quality, temperature control, egg disinfection | Fungal infections, deformities, poor yolk absorption | | Smolt production (freshwater) | 6-12 months | Smoltification timing, photoperiod, nutrition | Failed smoltification, bacterial kidney disease, gill lesions | | Sea cage grow-out | 12-24 months | Feeding rates, sea lice control, oxygen monitoring | Sea lice infestations, amoebic gill disease, storm damage | | Harvest | 1-2 weeks per cage | Crowding, stunning, bleeding, chilling | Stress, bruising, delayed processing, quality loss | ## Hatchery Operations ### Egg Incubation and Hatching Salmon hatcheries receive fertilized eggs from broodstock programs or certified suppliers. Eggs are incubated in stacked trays or vertical incubators with continuous flow of clean, oxygenated freshwater. Water temperature during incubation typically ranges from 6 to 12 degrees Celsius, with lower temperatures prolonging development and higher temperatures accelerating it. The FAO provides general guidance on cultured species management through its fishery resources (www.fao.org/fishery/en/culturedspecies). Eggs must be disinfected with iodophor solutions before incubation to reduce vertical transmission of bacterial pathogens. Dead or unfertilized eggs should be removed regularly to prevent fungal growth (Saprolegnia spp.) that can spread to healthy eggs. Hatchery staff should record daily mortality, water temperature, dissolved oxygen, and flow rates. Records should include egg source, disinfection date and concentration, incubation start date, and cumulative mortality through hatch. ### Fry Rearing After hatching, alevins absorb their yolk sacs over 4-6 weeks. Once the yolk is fully absorbed, fry begin exogenous feeding. First feeding requires high-quality starter feeds with particle sizes matched to fry mouth gape. Feed particle size typically starts at 0.3-0.5 mm and increases as fish grow. Fry are reared in tanks or raceways with controlled photoperiod and water flow. Stocking densities should be managed to maintain adequate oxygen levels and waste removal. The USDA Agricultural Research Service supports aquaculture research including hatchery technologies (www.ars.usda.gov/animal-production-and-protection/aquaculture). Farmers should record daily feed amounts, observed feeding behavior, and any signs of stress or disease. ### Water Quality Management Hatchery water quality directly affects survival and growth. Key parameters include dissolved oxygen (above 6 mg/L), pH (6.5-8.0), ammonia (below 0.02 mg/L unionized), and nitrite (below 0.1 mg/L). Temperature stability is critical, rapid fluctuations can cause stress and mortality. Recirculating aquaculture systems (RAS) are increasingly used in hatcheries to control water quality and temperature. A study on Atlantic salmon parr reared in RAS found that growth was fastest at 14 degrees Celsius, with efficient feed utilization and strong antioxidant activity at that temperature (Effects of Water Temperature on Growth, Hematological Measurements and Stress-Related [Gene Expression](/blog/guides/gene-expression) of Atlantic Salmon (Salmo salar) Parr Reared in a Recirculating Aquaculture System, Animals, 2025, doi.org/10.3390/ani15203048). However, even at 14 degrees Celsius, some mild stress responses were observed, indicating that optimal temperature for growth may not fully eliminate physiological stress. Farmers should monitor fish behavior and health indicators alongside temperature data. ### Common Hatchery Failure Patterns Poor egg quality from broodstock can lead to low hatch rates and high deformity prevalence. Temperature fluctuations during incubation cause developmental abnormalities including spinal deformities and jaw malformations. Fungal outbreaks occur when dead eggs are not removed promptly, allowing Saprolegnia to spread to adjacent healthy eggs. Overcrowding during fry rearing leads to oxygen depletion, poor growth, and increased aggression. ## Smolt Production ### Smoltification Process Smoltification is the physiological transformation that prepares freshwater salmon for seawater entry. This process involves changes in gill function, osmoregulation, and behavior. Smolts develop silver coloration and lose parr marks. Successful smoltification is essential for survival and growth in sea cages. Photoperiod manipulation is commonly used to induce smoltification. Extended day length (18-24 hours of light) followed by natural or simulated spring photoperiod triggers the process. Water temperature also influences smoltification timing. Farmers should monitor gill Na+/K+-ATPase activity as a biochemical indicator of smolt readiness. Records should include photoperiod schedule, temperature profile, and smoltification assessment results. ### Recirculating Aquaculture Systems for Smolts RAS technology allows year-round smolt production by controlling water temperature, oxygen, and waste removal. A descriptive study of Atlantic salmon reared in commercial RAS facilities found that plasma analyte levels were influenced by production environment (freshwater or saltwater) and fish weight (System- and fish-size-specific reference intervals for plasma analytes in Atlantic salmon (Salmo salar L.) reared in commercial fresh- and saltwater recirculating aquaculture systems: a descriptive study, Frontiers in Aquaculture, 2025, doi.org/10.3389/faquc.2025.1479875). Water quality parameters in that study remained within acceptable ranges, and no clear impact on biochemical values was found from variations in water quality. RAS-based salmon farming requires careful management of biofilters, oxygen supplementation, and carbon dioxide stripping. The recirculating aquaculture system approach for salmon production is documented in the scientific literature (Recirculating aquaculture system-based salmon farming, Semantic Scholar, 2019, www.semanticscholar.org/paper/8c1c3c3fc271a06299a4ba5f591db4c6fde2bc57). Farmers should monitor biofilter function through ammonia and nitrite levels, maintain oxygen supplementation systems, and ensure carbon dioxide stripping capacity matches fish biomass. ### Gill Health Monitoring Gill lesions are a significant concern in RAS-reared salmon. A semiquantitative scoring system for mild-to-moderate gill lesions in Atlantic salmon reared in RAS has been assessed in Norway (Assessment of a semiquantitative scoring system for mild-to-moderate gill lesions in Atlantic salmon reared in recirculating aquaculture systems in Norway, Journal of Veterinary Diagnostic Investigation, 2025, pubmed.ncbi.nlm.nih.gov/39876026). Farmers should regularly examine gill tissue for hyperplasia, lamellar fusion, and necrosis. Escalation to a fish health professional is warranted if gill lesion scores increase or if mortality rises above baseline. ### Common Smolt Production Failure Patterns Incomplete smoltification causes high seawater mortality after transfer. Farmers can assess smolt readiness through gill Na+/K+-ATPase activity and seawater challenge tests. Gill lesions from poor water quality in RAS reduce respiratory capacity and increase susceptibility to disease. Nutritional deficiencies, particularly in essential fatty acids and vitamins, lead to skeletal deformities and poor growth. Bacterial kidney disease outbreaks can cause chronic mortality and require culling of affected populations. ## Sea Cage Grow-Out ### Site Selection and Cage Configuration Sea cage sites must have adequate water depth (typically 30-50 meters), good water exchange, and acceptable environmental conditions. Current speed, temperature range, and oxygen levels should be assessed before deployment. Cage configurations include circular plastic cages, steel cages, and submerged systems. Offshore aquaculture development for Atlantic salmon farming has been explored in various regions, including potential applications in North Korea (Potential for offshore aquaculture development in North Korea: Focusing on Atlantic salmon farming, Marine Policy, 2020, doi.org/10.1016/j.marpol.2020.104092). Offshore sites offer greater water volume and waste dispersion but present challenges in access, mooring, and storm resistance. Farmers should conduct thorough site assessments including current profiling, temperature monitoring, and oxygen surveys before committing to a location. ### Stocking and Transfer Smolts are transferred from freshwater hatcheries to sea cages using well-boats or tanker trucks. Transfer should occur during cool temperatures and calm weather to minimize stress. Stocking densities in sea cages typically range from 10 to 25 kg/m3, depending on oxygen availability and water temperature. Farmers should record the number of fish transferred, average weight, date, and any treatments administered. Post-transfer mortality should be monitored daily for at least two weeks. Records should include transport water quality parameters, transport duration, and any observed signs of stress during transfer. ### Feeding and Nutrition Salmon are fed extruded pellets containing fishmeal, fish oil, plant proteins, and micronutrients. Feed conversion ratios (FCR) typically range from 1.0 to 1.4, depending on fish size, water temperature, and feed quality. Feeding rates are adjusted based on fish appetite, which is influenced by temperature, oxygen, and health status. Automated feeding systems with underwater cameras allow farmers to observe feeding behavior and adjust feed delivery. Overfeeding wastes feed and pollutes the environment, underfeeding reduces growth and increases size variation. Farmers should record daily feed amounts, observed feeding behavior, and any adjustments made to feeding rates. ### Sea Lice Management Sea lice (Lepeophtheirus salmonis and Caligus spp.) are ectoparasites that cause skin damage, stress, and increased susceptibility to secondary infections. The complexity of salmon-louse interactions involves host immune responses, environmental factors, and parasite life cycles (Catching the complexity of salmon-louse interactions, Fish & Shellfish Immunology, 2019, pubmed.ncbi.nlm.nih.gov/31048036). Management strategies include: - Fallowing sites between production cycles - Using cleaner fish (wrasse or lumpfish) to remove lice - Applying chemical treatments (bath or in-feed) - Using mechanical or thermal delousing systems - Breeding for lice resistance Lice counts should be monitored weekly during warm months and biweekly during cold months. Treatment thresholds vary by region and regulatory requirements. Escalation to a veterinarian is needed if lice levels exceed treatment thresholds or if fish show signs of skin damage. Records should include lice counts by life stage, treatment dates and methods, and any observed treatment efficacy or resistance. ### Common Sea Cage Failure Patterns Sea lice infestations cause skin damage, stress, and secondary infections that reduce growth and increase mortality. Amoebic gill disease outbreaks occur in warm water conditions and cause respiratory distress. Storm damage to cages and moorings can result in fish escapes and economic losses. Algal blooms cause oxygen depletion and direct toxicity, leading to mass mortality events. ## Health Management ### Disease Prevention Biosecurity protocols are essential to prevent disease introduction and spread. Measures include: - Disinfecting equipment and vehicles - Controlling visitor access - Using certified disease-free eggs and smolts - Quarantining new fish stocks - Vaccinating against common bacterial and viral diseases Vaccination strategies for farmed fish continue to evolve. Research on nanovaccine strategies for tilapia may have future applications for salmon (Addressing Nanovaccine Strategies for Tilapia, Vaccines, 2023, pubmed.ncbi.nlm.nih.gov/37631924). Current salmon vaccines are typically administered by injection at the smolt stage. Farmers should maintain vaccination records including vaccine type, batch number, dose, and administration date. ### Common Diseases | Disease | Causative Agent | Clinical Signs | Management | |---------|-----------------|----------------|------------| | Furunculosis | [Aeromonas salmonicida](/knowledge/bacteria/fish-bacteria/aeromonas-salmonicida) | Skin ulcers, hemorrhages, lethargy | Vaccination, antibiotics | | Bacterial kidney disease | [Renibacterium salmoninarum](/knowledge/bacteria/fish-bacteria/renibacterium-salmoninarum) | Exophthalmia, swollen abdomen, granulomas | Culling, disinfection | | Infectious salmon anemia | ISAV | Pale gills, anemia, hemorrhagic liver | Stamping out, biosecurity | | Amoebic gill disease | Neoparamoeba perurans | Respiratory distress, gill lesions | Freshwater baths, hydrogen peroxide | ### Health Monitoring and Records Daily health observations should include: - Feeding behavior and appetite - Swimming behavior and distribution - External signs of disease (skin lesions, fin damage, eye abnormalities) - Mortality counts and necropsy findings Monthly or quarterly health assessments should include: - Gill and skin scrapes for parasite examination - Blood sampling for clinical chemistry - Weight and length measurements - Condition factor calculation The USDA National Agricultural Library provides resources on animal health and welfare that apply to aquaculture (www.nal.usda.gov/animal-health-and-welfare). Farmers should establish relationships with aquatic veterinarians for diagnostic support and treatment planning. Records should include all health observations, diagnostic results, treatments administered, and outcomes. ### Professional Escalation Criteria Contact a fish health professional when: - Daily mortality exceeds 0.1% for three consecutive days - Unusual clinical signs appear in multiple cages - Lice counts exceed regulatory thresholds - Water quality parameters fall outside acceptable ranges - Fish show signs of systemic disease (lethargy, inappetence, abnormal behavior) ## Harvest Operations ### Pre-Harvest Preparation Harvest planning begins weeks in advance. Fish are starved for 3-7 days before harvest to empty the gut and reduce bacterial contamination during processing. Starvation periods depend on water temperature, warmer water requires shorter starvation times. Crowding and pumping fish from cages to harvest vessels must be done carefully to minimize stress and physical damage. Oxygen levels should be maintained during crowding and pumping. Farmers should record starvation start date, water temperature during starvation, and any observed changes in fish behavior. ### Stunning and Bleeding Humane stunning is required before bleeding. Methods include electrical stunning, percussive stunning, or carbon dioxide narcosis. After stunning, fish are bled by cutting the gill arches. Bleeding time should be at least 5-10 minutes in clean seawater to ensure complete blood removal. ### Chilling and Processing Harvested fish are chilled in ice slurry or refrigerated seawater to reduce metabolic rate and maintain quality. Core temperature should reach 0-4 degrees Celsius within 2-4 hours of death. Fish are then graded by weight, packed in insulated containers with ice, and transported to processing facilities. ### Quality Control Quality parameters assessed at harvest include: - Fillet color (using color fan or spectrophotometer) - Fat content - Texture - Presence of parasites or melanin spots - Bruising or scale loss Records should include harvest date, cage number, average weight, total weight, quality grade, and any defects observed. Farmers should maintain traceability records linking harvested fish to specific cages and production batches. ### Common Harvest Failure Patterns Stress during crowding causes poor fillet quality including soft texture and off-flavors. Incomplete bleeding leads to discoloration and reduced shelf life. Delayed chilling allows bacterial growth and enzymatic degradation. Bruising from rough handling reduces visual quality and market value. ## Environmental and Welfare Considerations ### Waste Management Salmon farming generates waste in the form of uneaten feed, feces, and metabolic byproducts. Waste can accumulate beneath sea cages, affecting benthic communities. Management strategies include: - Site rotation and fallowing - Feeding to minimize waste - Using submerged cages to disperse waste - Integrated multi-trophic aquaculture (IMTA) Stable isotope analysis has demonstrated nutrient connectivity between salmon and kelp in commercial-scale open coast IMTA systems (Stable isotope analysis suggests nutrient connectivity between salmon and kelp within a commercial scale open coast integrated multi-trophic aquaculture system, Scientific Reports, 2026, pubmed.ncbi.nlm.nih.gov/41888604). This approach can reduce environmental impacts while producing additional biomass. Farmers should monitor benthic conditions beneath cages and implement fallowing schedules as needed. ### Fish Welfare Welfare considerations apply throughout the production cycle. Key welfare indicators include: - Low mortality and morbidity - Normal feeding and swimming behavior - Absence of injuries or deformities - Appropriate stocking densities - Humane slaughter methods Ethical perspectives on salmon farming have been discussed in the literature, addressing sustainability and animal welfare (Sustainable Aquaculture: Are We Getting There? Ethical Perspectives on Salmon Farming, Journal of Agricultural and Environmental Ethics, 2011, doi.org/10.1007/s10806-010-9269-z). Farmers should implement welfare monitoring protocols and train staff in humane handling techniques. Records should include welfare assessments and any corrective actions taken. ### Regulatory Compliance Salmon farming is regulated by national and regional authorities. Regulations cover: - Water quality and effluent discharge - Disease control and reporting - Sea lice management - Fish health and welfare - [Food safety](/knowledge/bacteria/livestock-bacteria/cooking-chicken-bacteria-prevention) and traceability Farmers must maintain records of treatments, mortalities, harvests, and environmental monitoring. The FAO provides information on global aquaculture trends and regulatory frameworks (www.fao.org/animal-production/en). Farmers should stay informed about regulatory changes and maintain compliance documentation. ## Limitations and Challenges ### Biological Limitations Salmon farming is constrained by biological factors including temperature tolerance, disease susceptibility, and genetic diversity. Selective breeding programs have improved growth rate, disease resistance, and fillet quality. The current status and priorities for aquaculture genomics and breeding in the United States have been reviewed (Aquaculture genomics, genetics and breeding in the United States: current status, challenges, and priorities for future research, [BMC Genomics](/blog/guides/bmc-genomics), 2017, pubmed.ncbi.nlm.nih.gov/28219347). Farmers should source stock from reputable breeding programs and maintain genetic diversity within production populations. ### Environmental Limitations Site availability is limited by environmental conditions, regulatory restrictions, and competing uses of coastal areas. Offshore farming offers potential for expansion but requires significant investment in infrastructure and technology. Farmers should conduct thorough environmental impact assessments before developing new sites. ### Economic Limitations Salmon farming requires substantial capital investment in hatcheries, cages, vessels, and processing facilities. Operating costs include feed, labor, treatments, and energy. Market prices fluctuate based on supply, demand, and competition from wild-caught salmon. Farmers should develop business plans that account for price volatility and production risks. ### Stakeholder Perceptions The development of salmon farming is influenced by stakeholder perceptions, including concerns about environmental impacts, animal welfare, and [food safety](/knowledge/bacteria/livestock-bacteria/cooking-chicken-bacteria-prevention). A study of Norwegian salmon farming stakeholders identified factors influencing industry development (What's next for Norwegian salmon farming? Stakeholder perceptions on what influences industry development, Aquaculture, 2025, doi.org/10.1016/j.aquaculture.2025.742130). Farmers should engage with local communities, regulators, and consumers to address concerns and build trust. ## Frequently Asked Questions ### What is the typical timeline from egg to harvest for farmed salmon? The full production cycle from egg to harvest typically takes 24 to 36 months. Eggs incubate for 2-4 months, fry and parr are reared in freshwater for 6-12 months, and smolts grow in sea cages for 12-24 months before reaching harvest weight of 4-6 kg. ### What water temperature is optimal for Atlantic salmon growth in hatcheries? Research indicates that 14 degrees Celsius is close to optimal for growth and overall balance in Atlantic salmon parr reared in recirculating aquaculture systems. At this temperature, fish showed fastest growth, efficient feed utilization, and strong antioxidant activity, though some mild stress responses were still observed. ### How do farmers manage sea lice infestations in sea cages? Sea lice management involves multiple strategies including fallowing sites between production cycles, using cleaner fish (wrasse or lumpfish), applying chemical treatments (bath or in-feed), and using mechanical or thermal delousing systems. Lice counts are monitored weekly during warm months, and treatment thresholds are based on regulatory requirements. ### What is smoltification and why is it important? Smoltification is the physiological transformation that prepares freshwater salmon for seawater entry. It involves changes in gill function, osmoregulation, and behavior. Successful smoltification is essential for survival and growth in sea cages. Farmers use photoperiod manipulation and monitor gill Na+/K+-ATPase activity to assess smolt readiness. ### How do recirculating aquaculture systems benefit salmon farming? Recirculating aquaculture systems allow year-round production by controlling water temperature, oxygen levels, and waste removal. They reduce water usage and enable smolt production independent of seasonal constraints. RAS requires careful management of biofilters, oxygen supplementation, and carbon dioxide stripping to maintain water quality. ### What are the most common diseases in farmed salmon? Common diseases include furunculosis ([Aeromonas salmonicida](/knowledge/bacteria/fish-bacteria/aeromonas-salmonicida)), bacterial kidney disease ([Renibacterium salmoninarum](/knowledge/bacteria/fish-bacteria/renibacterium-salmoninarum)), infectious salmon anemia (ISAV), and amoebic gill disease (Neoparamoeba perurans). Vaccination, biosecurity, and regular health monitoring are essential for disease prevention and control. ### How is salmon harvested humanely? Salmon are harvested using humane stunning methods such as electrical stunning or percussive stunning before bleeding. After stunning, fish are bled by cutting the gill arches and then chilled in ice slurry or refrigerated seawater. Humane slaughter practices are important for fish welfare and meat quality. ### What environmental impacts are associated with salmon farming? Salmon farming generates waste in the form of uneaten feed, feces, and metabolic byproducts that can affect benthic communities. Management strategies include site rotation, fallowing, feeding to minimize waste, and integrated multi-trophic aquaculture. Nutrient connectivity between salmon and kelp in IMTA systems has been demonstrated through stable isotope analysis. ## Related Farming Guides - [Aquaponics Fish Health And System Management](/knowledge/animal-farming/aquaculture/aquaponics-fish-health-and-system-management) - [Freshwater Prawn Farming Stocking Shelter Feeding And Harvest Management](/knowledge/animal-farming/aquaculture/freshwater-prawn-farming-stocking-shelter-feeding-and-harvest-management) - [Genomic Health](/blog/guides/genome-browsers-for-researchers-a-guide-to-inspecting-genomic-evidence) - [Lentivirus Production](/blog/guides/plaque-assays-planning-controls-and-reporting-viral-titer) - [Systems Biology](/blog/news/systems-biology) ## Related Clinical & Scientific Guides * [Pond Sediment Management and Dredging Options](/knowledge/animal-farming/aquaculture/pond-sediment-management-dredging-options) * [Indoor Aquaculture Facilities: Lighting and Insulation](/knowledge/animal-farming/aquaculture/indoor-aquaculture-facilities-lighting-insulation) * [Greenhouse Aquaculture: Extending Growing Seasons](/knowledge/animal-farming/aquaculture/greenhouse-aquaculture-extending-growing-seasons) ## References and Further Reading - [www.fao.org](https://www.fao.org/fishery/en/culturedspecies) - [www.ars.usda.gov](https://www.ars.usda.gov/animal-production-and-protection/aquaculture) - [FAO Animal Production and Health](https://www.fao.org/animal-production/en). Food and Agriculture Organization of the United Nations. - [Animal Health and Welfare](https://www.nal.usda.gov/animal-health-and-welfare). USDA National Agricultural Library. - [Stable isotope analysis suggests nutrient connectivity between salmon and kelp within a commercial scale open coast integrated multi-trophic aquaculture system.](https://pubmed.ncbi.nlm.nih.gov/41888604). Scientific reports, 2026. - [Addressing Nanovaccine Strategies for Tilapia.](https://pubmed.ncbi.nlm.nih.gov/37631924). Vaccines, 2023. - [Assessment of a semiquantitative scoring system for mild-to-moderate gill lesions in Atlantic salmon reared in recirculating aquaculture systems in Norway.](https://pubmed.ncbi.nlm.nih.gov/39876026). Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc, 2025. - [Catching the complexity of salmon-louse interactions.](https://pubmed.ncbi.nlm.nih.gov/31048036). Fish & shellfish immunology, 2019. - [Aquaculture: global status and trends.](https://pubmed.ncbi.nlm.nih.gov/20713392). Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 2010. - [Aquaculture genomics, genetics and breeding in the United States: current status, challenges, and priorities for future research.](https://pubmed.ncbi.nlm.nih.gov/28219347). [BMC genomics](/blog/guides/bmc-genomics), 2017. - [Effects of Water Temperature on Growth, Hematological Measurements and Stress-Related Gene Expression of Atlantic Salmon (Salmo salar) Parr Reared in a Recirculating Aquaculture System](https://doi.org/10.3390/ani15203048). Animals, 2025. - [Recirculating aquaculture system-based salmon farming](https://www.semanticscholar.org/paper/8c1c3c3fc271a06299a4ba5f591db4c6fde2bc57). 2019. - [System- and fish-size-specific reference intervals for plasma analytes in Atlantic salmon (Salmo salar L.) reared in commercial fresh- and saltwater recirculating aquaculture systems: a descriptive study](https://doi.org/10.3389/faquc.2025.1479875). Frontiers in Aquaculture, 2025. - [Potential for offshore aquaculture development in North Korea: Focusing on Atlantic salmon farming](https://doi.org/10.1016/j.marpol.2020.104092). Marine Policy, 2020. - [What's next for Norwegian salmon farming? Stakeholder perceptions on what influences industry development](https://doi.org/10.1016/j.aquaculture.2025.742130). Aquaculture, 2025. - [Sustainable Aquaculture: Are We Getting There? Ethical Perspectives on Salmon Farming](https://doi.org/10.1007/s10806-010-9269-z). Journal of Agricultural and Environmental Ethics, 2011. > This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.