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首页> 美国卫生研究院文献>Journal of Plankton Research >Pelagic occurrences of the ice amphipod Apherusa glacialis throughout the Arctic
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Pelagic occurrences of the ice amphipod Apherusa glacialis throughout the Arctic

机译：冰两栖动物Apherusa glacialis在整个北极的浮游发生

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摘要

is a common, sea ice-associated amphipod found throughout the Arctic Ocean and has long been considered permanently associated with the sea ice habitat. However, pelagic occurrences of have also been reported. It was recently suggested that overwinters at depth within the Atlantic-water inflow near Svalbard, to avoid being exported out of the Arctic Ocean through the Fram Strait. This study collated pelagic occurrence records over a 71-year period and found that was consistently found away from its presumed sea ice habitat on a pan-Arctic scale, in different depths and water masses. In the Svalbard region, was found in Atlantic Water both in winter and summer. Additionally, we analyzed size distributions throughout the year, collected mostly from sea ice, in order to elucidate potential life cycle strategies. The majority of young-of-the-year was found in the sea ice habitat during spring, supporting previous findings. Data on size distributions and sex ratios suggest a semelparous lifestyle. A synchronous seasonal vertical migration was not evident, but our data imply a more complex life history than previously assumed. We provide evidence that can no longer be regarded as an autochthonous sympagic species.
机译：是在北冰洋发现的一种常见的与海冰相关的两栖动物，长期以来一直被认为与海冰的栖息地永久相关。但是，也有上层浮游生物的报道。最近，有人建议在斯瓦尔巴特群岛附近的大西洋水域深处越冬，以避免通过弗拉姆海峡从北冰洋输出。这项研究整理了71年期间中上层发生的记录，发现在泛北极范围内，在不同深度和水量范围内，始终从推测的海冰栖息地中发现了该记录。在斯瓦尔巴特群岛地区，冬季和夏季均在大西洋水域发现。此外，我们分析了全年的大小分布，主要从海冰中收集数据，以阐明潜在的生命周期策略。在春季，大多数年幼的孩子被发现在海冰栖息地，这支持了以前的发现。有关体型分布和性别比的数据表明，生活方式相似。同步的季节性垂直迁移并不明显，但是我们的数据暗示了比以前所假设的更复杂的生活史。我们提供的证据不能再被认为是一种本地共生物种。

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