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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Orientation behavior and swimming speed of Atlantic herring larvae (Clupea harengus) in situ and in laboratory exposures to rotated artificial magnetic fields
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Orientation behavior and swimming speed of Atlantic herring larvae (Clupea harengus) in situ and in laboratory exposures to rotated artificial magnetic fields

机译：大西洋鲱鱼幼虫（Clupea harengus）的原位和实验室暴露于旋转人工磁场的定向行为和游泳速度

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摘要

The dispersal of fish larvae during the early life stages plays an important role in recruitment. Together with oceanographic processes, larval orientation and swimming behavior significantly influences dispersal. However, currently there is no information of larval behavior in situ for most subpolar species. The Atlantic herring (Clupea harengus) is an ecologically and commercially important component of the North Atlantic ecosystem. This species has sustained a large fishery for over a century, and its stocks have experienced both dramatic collapse and recovery. The Atlantic herring is highly migratory, making it challenging for researchers to determine with certainty the structure and discreteness of different herring stocks. In this context, studying the behavior of herring larvae at sea is crucial for a deeper understanding of their dispersal. However, to date information on the orientation behavior and swimming abilities of herring larvae in situ is missing. In this study, we coupled in situ observations and laboratory experiments to investigate whether herring larvae display orientation when swimming in situ, and which mechanisms/cues they could use. We video recorded the orientation behavior of 208 herring larvae between 14 and 28 days post hatch (DPH) in the coastal Norwegian North Sea while they drifted in transparent behavioral chambers. We also tested the orientation of 136 larvae in a magnetic laboratory, in which they were deprived of any external cue and where we could modify the direction of the magnetic field. We report evidence that herring larvae have a significant preferred orientation direction to the southeast, which does not change between 14 and 28 DPH. Moreover, our results suggest that sunlight plays a key role as larvae had a highly significant orientation towards the sun during sunny weather, but they lost this ability, and exhibited lower precision in their orientation, under an overcast sky. We did not find evidence of magnetic compass orientation, indicating that the orientation direction of herring larvae is not magnetic, at least at this life history stage. Larvae swam at an average speed of 0.36-0.40 cm/s and reached maximum speeds of 3-3.36 cm/s. These results demonstrate that 14-28 DPH herring larvae are capable of orienting in situ. Possible implications of this orientation behavior for larval transport in Norwegian waters are also explored.
机译：在生命的早期阶段，鱼幼虫的扩散在募集中起着重要作用。与海洋学过程一起，幼虫的定向和游泳行为会显着影响扩散。但是，目前尚无关于大多数亚极物种的幼虫行为的信息。大西洋鲱鱼（Clupea harengus）是北大西洋生态系统的重要生态和商业组成部分。该物种在一个多世纪以来一直维持着大规模的渔业，其种群经历了急剧的崩溃和恢复。大西洋鲱鱼极易迁徙，这使得研究人员难以确定各种鲱鱼种群的结构和离散性。在这种情况下，研究鲱鱼在海上的行为对于深入了解其传播至关重要。然而，迄今为止，关于鲱鱼幼虫的定向行为和游动能力的信息尚缺乏。在这项研究中，我们结合原位观察和实验室实验来研究鲱鱼幼虫在原位游泳时是否显示方向，以及它们可以使用的机制/线索。我们录制了208个鲱鱼幼体在孵化后14到28天（DPH）之间在挪威北海沿海地区的定向行为，当时它们在透明的行为室内漂移。我们还在磁性实验室中测试了136个幼虫的方向，在该实验室中，它们没有任何外部提示，并且可以在其中修改磁场方向。我们报告的证据表明，鲱鱼幼虫向东南方向具有明显的首选方向，在14和28 DPH之间不会发生变化。此外，我们的结果表明，阳光是至关重要的，因为幼虫在晴朗的天气中对太阳的定向非常重要，但是在阴暗的天空下，它们失去了这种能力，并且定向精度较低。我们没有发现磁性罗盘方向的证据，这表明鲱鱼幼虫的方向方向至少在这个生命历史阶段不是磁性的。幼虫游动的平均速度为0.36-0.40 cm / s，达到的最大速度为3-3.36 cm / s。这些结果表明14-28 DPH鲱鱼幼虫能够原位定向。还探讨了这种定向行为对挪威水域幼体运输的可能影响。

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  • 来源
    《Journal of Experimental Marine Biology and Ecology》 |2020年第5期|151358.1-151358.9|共9页
  • 作者

  • 作者单位

    Rosenstiel Sch Marine & Atmospher Sci Dept Ocean Sci 4600 Rickenbacker Causeway Miami FL 33149 USA|Inst Marine Res Austevoll Res Stn Sauganeset 16 N-5392 Storebo Norway;

    Inst Marine Res Austevoll Res Stn Sauganeset 16 N-5392 Storebo Norway|Univ Otago Dept Marine Sci Dunedin 9016 New Zealand;

    Grotti Ehf Grundarstig 4 IS-101 Reykjavik Iceland;

    Inst Marine Res Austevoll Res Stn Sauganeset 16 N-5392 Storebo Norway;

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  • 正文语种 eng
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  • 关键词

    Herring larvae; Fish larvae; Orientation; Swimming; Migrations; Dispersal; Behavior;

    机译：鲱鱼幼虫;鱼幼虫;方向;游泳的;迁移;分散;行为;

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