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首页> 外文期刊>Marine ecology progress series >Behaviour of stocked and naturally recruited European eels during migration
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Behaviour of stocked and naturally recruited European eels during migration

机译：迁移过程中欧洲鳗存货和自然招募的行为

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摘要

One objection to the stocking of translocated eels as a management measure for the European eel Anguilla anguilla L. is that these eels may lack the ability to find their way back to the spawning area in the Sargasso Sea because the translocation will confuse their imprinted navigation. We undertook a series of tagging experiments using satellite tags, data storage tags and acoustic tags to test the hypothesis that eels translocated 1200 km from the UK to Sweden differed in their ability to migrate compared to naturally recruited eels. Eels to be tagged were caught in 2 locations, one with a record of eel stocking for more than 20 yr and with a series of barriers to upstream migration and another in a river with only natural immigration and without barriers to upstream migration. In the first year, the naturally recruited and stocked eels were released in a fjord where the initial escapement behaviour could be monitored by acoustic tagging in addition to using archival tags to track the subsequent marine migration. In the second year, eels were tagged with archival or satellite tags and released on the open coast, and only their marine migration was investigated. Eels were tracked more than 2000 km along a route that, after leaving the Skagerrak, followed the Norwegian Trench to the Norwegian Sea, turned south and west along the Faroe-Shetland channel before emerging into the Atlantic Ocean, and then continued west. There were no statistically significant differences in estuarine or oceanic behaviour regarding route, swimming speed and preferred swimming depth between stocked and naturally recruited eels. These results provide the first empirical evidence of a Nordic migration route and do not support the hypothesis that a sequential imprinting of the route during immigration is necessary for adequate orientation or behaviour during the adult spawning migration.
机译：反对将易失性鳗鱼作为欧洲鳗鳗的一种管理措施的反对意见是，这些鳗鱼可能缺乏找到返回到Sargasso海产卵区的能力，因为易位性鱼类会混淆其印记的航行。我们进行了一系列使用卫星标签，数据存储标签和声学标签的标记实验，以检验以下假设：从英国移居1200公里至瑞典的鳗鱼与自然募集的鳗鱼相比，其迁移能力有所不同。被标记的鳗鱼被捕获在两个地点，一个地点记录了超过20年的鳗鱼放养记录，并且对上游迁移形成了一系列障碍，而另一个河道中只有自然移民，而对上游迁移没有障碍。在第一年，自然招募和放养的鳗鱼在峡湾被释放，除了使用档案标签来跟踪随后的海洋迁移以外，还可以通过声学标签来监测最初的逃逸行为。在第二年，用档案标签或卫星标签给鳗鱼贴标签，然后在开阔的海岸上放开，只调查了它们的海洋迁移情况。沿一条路线追踪鳗鱼超过2000公里，该路线在离开Skagerrak之后，跟随挪威海沟到达挪威海，沿着法罗-设得兰群岛海峡向南和向西转向，然后才进入大西洋，然后向西延伸。在放养和自然捕捞的鳗鱼之间，在路线，游泳速度和首选游泳深度方面，河口或海洋行为没有统计学上的显着差异。这些结果提供了北欧迁徙路线的第一个经验证据，并不支持这样的假说：在成年产卵迁徙期间，路线的顺序印记对于适当定向或行为是必要的。

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  • 来源
    《Marine ecology progress series》 |2014年第27期|145-157|共13页
  • 作者

    Hakan Westerberg; Niklas Sjoeberg; Ingvar Lagenfelt; Kim Aarestrup; David Righton;

  • 作者单位

    Swedish University of Agricultural Sciences (SLU), Institute of Freshwater Research, 178 93 Drottningholm, Sweden;

    Swedish University of Agricultural Sciences (SLU), Institute of Freshwater Research, 178 93 Drottningholm, Sweden,Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91 Stockholm, Sweden;

    The County Administrative Board of Vaestra Goetaland, 403 40 Goteborg, Sweden;

    Technical University of Denmark (DTU), National Institute of Aquatic Resources, Vejlsovej 39, 8600 Silkeborg, Denmark;

    Centre for Environment, Fisheries, and Aquaculture Science (CEFAS), Pakefield Road, Lowestoft NR33 0HT, UK;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Eel management plan; Anguilla anguilla; Translocation; North Atlantic; Electronic tags;

    机译：鳗鱼管理计划;安圭拉（Anguilla）安圭拉（Anguilla）;易位;北大西洋;电子标签;

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