The effect of a warmer climate on the salmon lice infection pressure from Norwegian aquaculture DOI Creative Commons
Anne Dagrun Sandvik, Sussie Dalvin, Rasmus Skern‐Mauritzen

et al.

ICES Journal of Marine Science, Journal Year: 2021, Volume and Issue: 78(5), P. 1849 - 1859

Published: March 24, 2021

Abstract Climate change can hamper sustainable growth in the aquaculture industry by amplifying and adding to other environmental challenges. In Norway, salmon lice-induced mortality wild salmonid populations is identified as a major risk factor for further expansion. Higher temperatures will induce increased production of lice larvae, decreased developmental time from non-infective nauplii infectious copepods, higher infectivity copepodids. warmer climate, modelling exercise shows how these three factors lead significant increase infection pressure farmed salmonids, where copepodids term with highest sensitivity temperature changes. The total gradually increases increasing temperature, an estimated twofold if 9°C 11°C. Thus, making it even harder achieve expansion rising water temperature. This study demonstrates bio-hydrodynamic models might be used assess combined effects future climate on salmonids. results early warning fish-farmers, conservation stakeholders management authorities, serve tool test mitigation strategies before implementation new plans.

Language: Английский

Evaluation of a national operational salmon lice monitoring system—From physics to fish DOI Creative Commons
Mari S. Myksvoll, Anne Dagrun Sandvik, Jon Albretsen

et al.

PLoS ONE, Journal Year: 2018, Volume and Issue: 13(7), P. e0201338 - e0201338

Published: July 31, 2018

The Norwegian government has decided that the aquaculture industry shall grow, provided growth is environmentally sustainable. Sustainability scored based on mortality of wild salmonids caused by parasitic salmon lice. Salmon lice infestation pressure traditionally been monitored through catching sea trout and Arctic char using nets or traps trawling after Atlantic postsmolts. However, due to mainland coastline nearly 25 000 km, complementary methods may be used in order give complete results are needed. We have therefore developed an operational model, which calculates all along coast near real-time a hydrodynamical ocean model particle tracking model. hydrodynamic generally shows negative temperature bias positive salinity compared observations. modeled dispersion correlates with measured caught nets. This allows for two data sources determine originating from fish farms salmonids, thereby provide improved monitoring system assessing risk sustainability forms basis knowledge-based advice management authorities.

Language: Английский

Citations

88
Factors associated with baseline mortality in Norwegian Atlantic salmon farming DOI Creative Commons
Victor Henrique Silva de Oliveira, Katharine R. Dean, Lars Qviller

et al.

Scientific Reports, Journal Year: 2021, Volume and Issue: 11(1)

Published: July 19, 2021

Abstract In 2019, it was estimated that more than 50 million captive Atlantic salmon in Norway died the final stage of their production marine cages. This mortality represents a significant economic loss for producers and need to improve welfare farmed salmon. Single adverse events, such as algal blooms or infectious disease outbreaks, can explain mass However, little is known about production, health, environmental factors contribute baseline during sea phase. Here we conducted retrospective study including 1627 cohorts put 2014–2019. We found lice treatments were associated with mortality. particular, trend towards non-medicinal treatments, thermal delousing, increases same month treatment applied. There differences among zones. Stocking weight other important factors, lowest smaller stocked August–October. Sea surface temperature salinity also influenced Knowledge what affects Norwegian aquaculture be used part syndromic surveillance inform on farming practices reduce

Language: Английский

Citations

62
Applying genetic technologies to combat infectious diseases in aquaculture DOI Creative Commons
Nicholas A. Robinson, Diego Robledo, Lene Sveen

et al.

Reviews in Aquaculture, Journal Year: 2022, Volume and Issue: 15(2), P. 491 - 535

Published: Sept. 5, 2022

Disease and parasitism cause major welfare, environmental economic concerns for global aquaculture. In this review, we examine the status potential of technologies that exploit genetic variation in host resistance to tackle problem. We argue there is an urgent need improve understanding mechanisms involved, leading development tools can be applied boost reduce disease burden. draw on two pressing problems as case studies-sea lice infestations salmonids white spot syndrome shrimp. review how latest capitalised upon determine underlying inter- intra-species pathogen/parasite resistance, derived knowledge could using selective breeding, gene editing and/or with targeted feed treatments vaccines. Gene brings novel opportunities, but also implementation dissemination challenges, necessitates new protocols integrate technology into aquaculture breeding programmes. There ongoing minimise risks agents evolving overcome improvements insights from epidemiological evolutionary models pathogen infestation wild cultured populations are explored. Ethical issues around different approaches achieving discussed. Application has fundamental affecting provide effective pathways lead more resistant stocks, transforming

Language: Английский

Citations

39
Direct evidence of increased natural mortality of a wild fish caused by parasite spillback from domestic conspecifics DOI Creative Commons
Knut Wiik Vollset, Robert J. Lennox, Helge Skoglund

et al.

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2023, Volume and Issue: 290(1991)

Published: Jan. 25, 2023

Parasite spillback from domestic animals can distort the balance between host and parasites in surrounding wildlife, with potential detrimental effects on wild populations. In aquatic environments, parasite aquaculture to salmon is one of most contentious sustainability debates. a 19 year time series release group studies Atlantic salmon, we demonstrated that (i) effect subjecting out-migrating smolts treatment marine survival has been reduced over time, (ii) relation lice levels out-migration route against weak, but also (iii) return rates both treated untreated groups are negatively correlated levels, (iv) returns region similarly during year. Our study suggests have large populations not revealed randomized control trials using antiparasitic drugs. This should be better accounted for when considering impacts farms

Language: Английский

Citations

24
Spatial density, externalities, and productivity of salmon aquaculture farms DOI

Kamila Kulmambetova,

Ragnar Tveterås

Aquaculture Economics & Management, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 25

Published: Jan. 29, 2025

Language: Английский

Citations

1
Crowding causes detachment and loss of mobile sea lice: Fine-meshed crowding nets may mitigate spread DOI
Lena Geitung, Luke T. Barrett, Velimir Nola

et al.

Aquaculture Reports, Journal Year: 2025, Volume and Issue: 42, P. 102784 - 102784

Published: April 7, 2025

Language: Английский

Citations

1
Cleaner fish in aquaculture: review on diseases and vaccination DOI Creative Commons
Toni Erkinharju, Roy A. Dalmo,

Miroslava Hansen

et al.

Reviews in Aquaculture, Journal Year: 2020, Volume and Issue: 13(1), P. 189 - 237

Published: July 26, 2020

Abstract Combating and controlling sea lice causes large economic costs for the farmers, with estimated values of more than 305 million euros (€) per year. Increased resistance against traditional chemotherapeutants due to evolutionary drivers in combined lack an effective vaccine few other chemical treatments available are expected cause these increase. Several possible methods managing infestations have been investigated, but only cleaner fish has proven effect on levels. Cleaning activity is well known marine observed wild as a form symbiosis between two species: one species, ‘client’ fish, seek out ‘cleaner’ ectoparasites dead tissue cleared from its body. The Atlantic lumpfish relatively new aquaculture wild‐caught mature used brood stock farmed production. This poses biosecurity risk, can carry pathogens, use quarantine health screening recommended. Vaccine development unfortunately lagging far behind wide spread high utilisation fish. review contains description main pathogens diseases that affect

Language: Английский

Citations

66
The importance of calibrating climate change projections to local conditions at aquaculture sites DOI Creative Commons
Lynne Falconer, Solfrid Sætre Hjøllo, Trevor C. Telfer

et al.

Aquaculture, Journal Year: 2019, Volume and Issue: 514, P. 734487 - 734487

Published: Sept. 6, 2019

Future climate projections are usually only available at global or coarse scale and the focus is often on long-term regional averages. Though useful to analyse general trends identify potential risks opportunities internationally, these resolutions unable capture complexity of coastal areas where aquaculture located, poorly represent environmental variabilities which cultured organisms subjected. Consequently, most planning management decisions require information a much finer scale. If do not adequately conditions experienced sites, impacts could be missed, adaptation strategies may inappropriate, time resources spent implementing ineffective measures. To demonstrate this, we sea temperature production Atlantic salmon (Salmo salar) in Norway, world's leading producer country with latitudinal range that exemplifies challenges related generalization farming practises. The results show if resolution model temperatures were used directly, then culture severely over underestimated. For overlapping reference periods, average daily modelled selected sites frequently differed by several degrees, largest differences being 6 °C, when compared farm measurements. This has serious biological economic implications as underestimated unless corrected. Here two bias-correction techniques calibrate shown more accurately reflect experienced. calibrated future for RCP4.5 suggest increased all adjustments existing practices, but nature severity impact will vary location. Our research clearly shows local must considered, using locally resolved projections, develop meaningful plans meet growing demand seafood changing climate.

Language: Английский

Citations

57
Effect of cleaner fish on sea lice in Norwegian salmon aquaculture: a national scale data analysis DOI
Luke T. Barrett, Kathy Overton, Lars Helge Stien

et al.

International Journal for Parasitology, Journal Year: 2020, Volume and Issue: 50(10-11), P. 787 - 796

Published: Feb. 7, 2020

Language: Английский

Citations

55
Salmon lice-induced mortality of Atlantic salmon during post-smolt migration in Norway DOI Creative Commons

Ingrid Askeland Johnsen,

Alison Harvey, Pål Næverlid Sævik

et al.

ICES Journal of Marine Science, Journal Year: 2020, Volume and Issue: 78(1), P. 142 - 154

Published: Oct. 12, 2020

Abstract The expansion of salmonid aquaculture has resulted in environmental challenges, including salmon lice that may infest both farmed and wild fish. For Atlantic post-smolts migrate from their rivers to the ocean, first phase journey coastal zone, where occurs, is critical when considering exposure. To evaluate influence during post-smot migration we have developed a model. An archive with spatiotemporal concentrations larvae Norwegian waters been established using combination state-of-the-art hydrodynamic biology models. estimate lice-induced mortality rivers, infestation level on virtual was calibrated match observed genetically assigned origin. pressure modelled 401 covering all Norway. Based this, aquaculture-produced estimated as <10% for 179 10–30% 140 >30% 82 2019. Estimated mortalities were used together other data sets sustainability regulatory system represents globally leading example science-based management considers impact.

Language: Английский

Citations

54