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首页> 外文期刊>ICES Journal of Marine Science >Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Kroyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords
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Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Kroyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords

机译：鲑鱼虱，鲑鱼Leopophtheirus（Kroyer），大西洋鲑，北峡湾内的大西洋鲑，棕鳟鱼和北极鲑的同居人口侵染的风险和后果的差异

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摘要

Differences in salmon louse (Lepeophtheirus salmonis) infestation on sympatric populations of fjord-migrating, Atlantic salmon post-smolts (Salmo salar), brown trout (Salmo trutta) (sea trout), and Arctic charr (Salvelinus alpinus) were studied in three fjords with fishfarming activity in northern Norway during the period June-August 2000. Atlantic salmon post-smolts were only captured in the fjords during late June and early July, and probably left them subsequently. No fish were infested with salmon lice. In contrast, brown trout and Arctic charr had similar infection patterns during their sampling periods, with very low prevalence and mean infection intensity during June (0-21% and 0-6 lice per fish, respectively), slightly increasing in July (8-70% and 6-12 lice per fish, respectively), and peaking in August (80-88% and 19-27 lice per fish, respectively). The chalimus stages dominated during June and July, with a few pre-adult and adult stages observed in July, and all stages were found frequently during August. The observations indicate that Atlantic salmon may have a mismatch between the time of louse infestation and their post-smolt fjord migration in northern fjords. In contrast, brown trout and Arctic charr feed within the fjords throughout summer and have a higher risk of harmful infestation in years with suitable environmental conditions for salmon louse development, especially in fish-farming areas. Arctic charr usually spend the shortest time at sea of the three species, and the salmon lice may not have time to develop to the adult stage on this species.
机译：在三个峡湾中研究了移徙的峡湾，大西洋鲑后熏鲑（Salmo salar），褐鳟（Salmo trutta）（海鳟）和北极鲑（Salvelinus alpinus）的同胞人口鲑鱼虱（Lepeophtheirus鲑鱼）的感染差异在2000年6月至8月期间在挪威北部进行了鱼类养殖活动。大西洋鲑的熏鲑鱼仅在6月下旬和7月初捕获在峡湾中，随后很可能就离开了。没有鱼被鲑鱼虱侵害。相比之下，褐鳟和北极鲑在采样期间的感染模式相似，在6月的患病率和平均感染强度非常低（每条鱼分别为0-21％和0-6虱子），7月略有增加（8-每条鱼分别有70％和6-12虱子出现，并在8月达到峰值（每条鱼分别有80-8％和19-27虱子）。 Chalimus阶段在6月和7月占主导地位，在7月观察到一些成年前和成年阶段，并且在8月期间经常发现所有阶段。观测结果表明，大西洋鲑在虱子侵染时间与北峡湾熏鲑后峡湾迁徙之间可能不匹配。相反，整个夏季，鳟鱼和北极鲑鱼在峡湾内觅食，而且在适合鲑鱼虱发展的环境条件下，多年内有害侵扰的风险较高，特别是在鱼类养殖区。北极鲑通常在这三个物种的海上度过最短的时间，鲑鱼虱可能没有时间在该物种上发育到成年阶段。

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