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首页> 外文期刊>Aquaculture >'Snorkel' sea lice barrier technology reduces sea lice loads on harvest-sized Atlantic salmon with minimal welfare impacts
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'Snorkel' sea lice barrier technology reduces sea lice loads on harvest-sized Atlantic salmon with minimal welfare impacts

机译：“浮潜”海虱隔离技术减少了对收获大小的大西洋鲑鱼的海虱负荷，对福利的影响最小

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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.
机译：外来寄生海虱（Lepeophtheirus鲑鱼）对养殖大西洋鲑鱼（Salmo salar）的侵染，提出了对寄生虫控制的新方法的需求。一种选择是使用“浮潜”海虱屏障技术，该技术可限制鲑鱼进入海面，除非通过不透海虱幼虫的垂直小室。这样可以防止鲑鱼在传染性海虱最丰富的深度游泳。在将通气管用于商业海笼之前，需要了解通气管对鲑鱼福利和生长的影响。在这里，我们将深度为4 m的通气管安装到三个12 x 12 x 12m（3）的网箱中，并记录了放养鱼的虱子侵扰以及它们在12周内的生长，行为以及口鼻和鳍状情况。使用三个标准海箱进行比较，所有六个网箱都放养了约3500条鲑鱼（2.3 +/- 0.6千克）。在3、6、9和12周后，通气管网箱中的鱼虱子的虱子水平分别比标准网箱低65％，24、43和56％。呼吸管和标准网箱中的鲑鱼生长相似，并且对鱼类的死亡率或福祉没有或几乎没有不利影响。结果表明，通气管海笼屏障技术为鲑鱼养殖中的寄生虫管理提供了有希望的新工具。 C）2016作者。由Elsevier B.V.发布

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