期刊
AQUACULTURE
卷 458, 期 -, 页码 29-37出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aquaculture.2016.02.014
关键词
Salmon; Sea lice; Snorkel; Submerged sea-cage
资金
- Norwegian Seafood Research Fund [FHF 900884]
The infestation of farmed Atlantic salmon (Salmo salar) by ectoparasitic sea lice (Lepeophtheirus salmonis) presents a need for newapproaches to parasite control. One option is the use of 'snorkel' sea lice barrier technology, which restricts salmon from accessing the surface except via a vertical chamber impermeable to sea lice larvae. This prevents the salmon from swimming at the depths where infective sea lice are most abundant. Before snorkels can be implemented in commercial sea-cages, knowledge is required about their effects on salmon welfare and growth. Here, we installed snorkels of 4 m depth into three 12 x 12 x 12m(3) cages, and recorded the lice infestation of stocked fish along with their growth, behaviour, and snout and fin condition over a 12-week period. Three standard sea-cages were utilised for comparison, and all six cages were stocked with similar to 3500 salmon (2.3 +/- 0.6 kg). After 3, 6, 9, and 12 weeks, fish in snorkel cages had 65, 24, 43, and 56% lower lice levels than in standard cages, respectively. Salmon in both snorkel and standard cages grew similarly well and we detected little or no adverse effects on fish mortality or welfare. The results indicate that snorkel sea-cage barrier technology provides a promising new tool in parasite management in salmon aquaculture. C) 2016 The Authors. Published by Elsevier B.V.
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