Field assessment of Pacific oyster (Crassostrea gigas) growth and ingestion of planktonic salmon louse (Lepeophtheirus salmonis) larvae at an Atlantic salmon (Salmo salar) farm in British​ Columbia, Canada

Byrne, Allison A.; Pearce, Christopher M.; Cross, Stephen F.; Jones, Simon R. M.; Robinson, Shawn; Hutchinson, Marilyn J.; Miller, Matthew; Haddad, Colleen A.; Johnson, Devan L.

doi:10.1016/j.aquaculture.2018.01.034

Cited by 6 publications

(6 citation statements)

References 49 publications

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“…Filter‐feeding shellfish racks hung around sea cages may reduce louse abundance if deployed at sufficient scale (Byrne et al . 2018; Montory et al . 2020), while powered filters are effective in the context of preventing lice and eggs from entering the environment during delousing (O’Donohoe & Mcdermott 2014).…”

Section: What Preventative Methods Are Available?mentioning

confidence: 99%

Prevention not cure: a review of methods to avoid sea lice infestations in salmon aquaculture

Barrett

Oppedal

Robinson

et al. 2020

Reviews in Aquaculture

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The Atlantic salmon aquaculture industry still struggles with ectoparasitic sea lice despite decades of research and development invested into louse removal methods. In contrast, methods to prevent infestations before they occur have received relatively little research effort, yet may offer key benefits over treatment‐focused methods. Here, we summarise the range of potential and existing preventative methods, conduct a meta‐analysis of studies trialling the efficacy of existing preventative methods and discuss the rationale for a shift to the prevention‐focused louse management paradigm. Barrier technologies that minimise host–parasite encounter rates provide the greatest protection against lice, with a weighted median 76% reduction in infestation density in cages with plankton mesh ‘snorkels’ or ‘skirts’, and up to a 100% reduction for fully enclosed cages. Other methods such as geographic spatiotemporal management, manipulation of swimming depth, functional feeds, repellents and host cue masking can drive smaller reductions that may be additive when used in combination with barrier technologies. Finally, ongoing development of louse‐resistant salmon lineages may lead to long‐term improvements if genetic gain is maintained, while the development of an effective vaccine remains a key target. Preventative methods emphasise host resistance traits while simultaneously reducing host–parasite encounters. Effective implementation has the potential to dramatically reduce the need for delousing and thus improve fish welfare, productivity and sustainability in louse‐prone salmon farming regions.

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Section: What Preventative Methods Are Available?mentioning

confidence: 99%

Prevention not cure: a review of methods to avoid sea lice infestations in salmon aquaculture

Barrett

Oppedal

Robinson

et al. 2020

Reviews in Aquaculture

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“…fish–bivalve) has been demonstrated to decrease organic waste accumulation on the ocean floor, as portions of the waste nutrients of one species are captured and converted into energy by others, reducing the environmental impact (Byrne et al, ; Carras et al, ; Hughes & Black, ). Added to the evidence for mitigation of sea lice infestation by cultured bivalves, this would expand the potential environmental and social benefits of IMTA (Byrne et al, ; Carras et al, ). However, the IMTA increases complexity in logistics, infrastructure, biosecurity, diseases and human resources capacity (Byrne et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…Added to the evidence for mitigation of sea lice infestation by cultured bivalves, this would expand the potential environmental and social benefits of IMTA (Byrne et al, ; Carras et al, ). However, the IMTA increases complexity in logistics, infrastructure, biosecurity, diseases and human resources capacity (Byrne et al, ). In this context, to assure that the IMTA for salmon culture (the core business) continues being profitable, it is crucial that the new complexities produced by the incorporation of IMTA do not reduce the efficiency of the salmon production (Byrne et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…However, the IMTA increases complexity in logistics, infrastructure, biosecurity, diseases and human resources capacity (Byrne et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…In this context, to assure that the IMTA for salmon culture (the core business) continues being profitable, it is crucial that the new complexities produced by the incorporation of IMTA do not reduce the efficiency of the salmon production (Byrne et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

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The filter‐feeding bivalve Mytilus chilensis capture pelagic stages of Caligus rogercresseyi: A potential controller of the sea lice fish parasites

Montory

Chaparro

Averbuj

et al. 2020

Journal of Fish Diseases

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The copepod Caligus rogercresseyi is an ectoparasite of several salmonid species. The pumping activity of filter‐feeding molluscs could reduce the abundance of copepod dispersive larval stages in the water column. In this research, nauplius II and copepodid larvae of C. rogercresseyi were exposed to filtering mussels (Mytilus chilensis) of different sizes. These mussels were able to filter both larval stages, although they were more efficient in catching nauplius II. The fact that nauplius II were ingested more efficiently could be explained by their smaller size, lower swimming velocity (escape) and longer resting times between movements, when they were exposed to the influx of water around the inhalant area of the mussels. Larger mussels were more effective filtering C. rogercresseyi larvae due to their larger inhalant area and the related water influx. Additionally, the results suggest that larvae captured by the mussels can be incorporated into pseudofaeces or ingested and then released as part of the faeces. Thus, high concentrations of M. chilensis surrounding salmon farms may act as biological barriers, reducing the density of copepod dispersive larval stages and, thus, salmon infestations.

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Abundance of sea lice larvae in plankton samples: determination of optimal sample sizes

et al. 2022

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Field assessment of Pacific oyster (Crassostrea gigas) growth and ingestion of planktonic salmon louse (Lepeophtheirus salmonis) larvae at an Atlantic salmon (Salmo salar) farm in British Columbia, Canada

Cited by 6 publications

References 49 publications

Prevention not cure: a review of methods to avoid sea lice infestations in salmon aquaculture

Prevention not cure: a review of methods to avoid sea lice infestations in salmon aquaculture

The filter‐feeding bivalve Mytilus chilensis capture pelagic stages of Caligus rogercresseyi: A potential controller of the sea lice fish parasites

Abundance of sea lice larvae in plankton samples: determination of optimal sample sizes

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Field assessment of Pacific oyster (Crassostrea gigas) growth and ingestion of planktonic salmon louse (Lepeophtheirus salmonis) larvae at an Atlantic salmon (Salmo salar) farm in British​ Columbia, Canada

Cited by 6 publications

References 49 publications

Prevention not cure: a review of methods to avoid sea lice infestations in salmon aquaculture

Prevention not cure: a review of methods to avoid sea lice infestations in salmon aquaculture

The filter‐feeding bivalve Mytilus chilensis capture pelagic stages of Caligus rogercresseyi: A potential controller of the sea lice fish parasites

Abundance of sea lice larvae in plankton samples: determination of optimal sample sizes

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Product

Resources

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Field assessment of Pacific oyster (Crassostrea gigas) growth and ingestion of planktonic salmon louse (Lepeophtheirus salmonis) larvae at an Atlantic salmon (Salmo salar) farm in British Columbia, Canada