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首页> 外文期刊>Polar biology >In-situ observations on the distribution and behavior of amphipods and Arctic cod (Boreogadus saida) under the sea ice of the High Arctic Canada Basin
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In-situ observations on the distribution and behavior of amphipods and Arctic cod (Boreogadus saida) under the sea ice of the High Arctic Canada Basin

机译：北极高加索盆地海冰下两栖动物和北极鳕（Boreogadus saida）的分布和行为的原位观察

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摘要

The occurrence and behavior of sympagic amphipods and Arctic cod (Boreogadus saida) were studied in the High Arctic Canada Basin by diving under the ice at seven stations in summer 2002. Still images of video-transects were used to obtain animal abundances and information on the structure of the ice environment. Mean amphipod abundances for the stations varied between 1 and 23 individuals m(-2), with an increase towards the western part of the basin. The standard deviation within the 31-51 images analyzed per station was small (<1 individual m(-2)). Gammarus wilkitzkii was found in low abundances, often hiding in small ice gaps. Small amphipods (Onisimus spp., Apherusa glacialis, and juveniles of all species) tended to move freely along the bottom of the floes. B. saida occurred in narrow wedges of seawater along the edges of melting ice floes at three stations in water depths of 10-50 cm and was never found under the ice. The fish occurred in schools of 1-28 per wedge. Fish were inactive and did not escape the approaching diver. Resting in the wedges may be a strategy to reduce energetic requirements and avoid predators.
机译：2002年夏季，在加拿大高北极地区的冰层下潜水，研究了共生两栖动物和北极鳕（Boreogadus saida）的发生和行为。利用视频样带的静止图像获取动物的丰度，并获得有关该物种的信息。冰环境的结构。站的平均两栖动物的丰度在1到23个人m（-2）之间变化，向盆地的西部增加。每个工作站分析的31-51张图像内的标准偏差很小（<1个单独的m（-2））。伽玛鲁斯·威尔基茨基（Gammarus wilkitzkii）的丰度很低，通常藏在小冰隙中。小型两栖纲动物（Onisimus spp。，Apherusa glacialis和所有物种的幼体）倾向于沿着絮体的底部自由移动。 B. saida发生在融化的浮冰边缘的三个狭窄海水楔中，三个站点的水深为10-50 cm，从未在冰下发现。鱼在每个楔形鱼中出现1-28。鱼没有活动，也没有逃脱即将到来的潜水员。停在楔子上可能是减少精力需求并避免掠食者的策略。

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