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首页> 外文期刊>Polar biology >Newly detected haul-out of Atlantic walruses (Odobenus rosmarus rosmarus) on Yamal Peninsula has become the biggest in the Kara Sea
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Newly detected haul-out of Atlantic walruses (Odobenus rosmarus rosmarus) on Yamal Peninsula has become the biggest in the Kara Sea

机译：在山羊半岛的新检测到的大西洋海象（Odobenus Rosmarus Rosmarus）已成为卡拉海最大的

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摘要

Atlantic walruses (Odobenus rosmarus rosmarus) are still poorly studied in the easternmost part of their range, especially in the Kara Sea. Therefore, any new data from this region on the biology and ecology of the subspecies are highly important. In autumn 2019, the largest coastal assemblage of walruses ever found in the Kara Sea was observed on the northwestern coast of the Yamal Peninsula. This assemblage was surveyed using a drone-mounted digital camera (from 5 m in altitude) on 17 October 2019. The herd comprised 1062 (+/- 17 SE) walruses. Approximately one-sixth of the assemblage consisted of dependent calves (0-2 years old), one-sixth consisted of mature bulls, one-third consisted of independent immature animals, and one-third consisted of mature females and young (mature) males. A considerable but not estimated number of walruses was also observed in nearshore water. Satellite imagery and an opportunistic visit to the site revealed that walruses used this haul-out from mid-September until at least the end of October. Satellite tracking of two tagged walruses showed that animals stayed within 200 km of the coastline in shallow water (not deeper than 20-25 m) throughout their tracking periods (8 and 9 days). In addition to the main haul-out, three more sites on this part of the Yamal Peninsula coast were identified as areas where walruses came ashore. These new abundance and distribution data from the Kara Sea add significantly to our knowledge regarding Atlantic walruses in this region. Considering the rapid and large-scale industrial development in the region, proactive measures should be taken to protect key walrus habitats in the Yamal Peninsula area.
机译：大西洋海象（Odobenus Rosmarus Rosmarus）仍然在其范围内的最东部仍然很差，特别是在卡拉海。因此，来自该地区的任何新数据对亚种的生物学和生态学都非常重要。 2019年秋季，在山脉半岛的西北海岸观察到卡拉海中有史以来最大的海豚沿海大会。 2019年10月17日，使用无人驾驶的数码相机（高度5米）调查该组件。群体包括1062（+/- 17 SE）的Walruses。大约六分之一的组合组成包括依赖的小牛（0-2岁），第六分之一由成熟公牛组成，三分之一由独立的未成熟动物组成，三分之一由成熟的女性和年轻（成熟）男性组成。 。在近岸水域也观察到相当大但未估计的瓦鲁斯人数。卫星图像和对网站的机会主义访问透露，海瓦卢斯在九月中旬使用这种拖运，直到10月底。两种标记的海象的卫星跟踪显示，在其跟踪期间（8和9天），动物在浅水中的海岸线（不超过20-25米）的海岸线中停留在200公里内。除了主要拖运之外，山羊半岛海岸的这一部分的三个网站被确定为海瓦上岸的地区。来自卡拉海的这些新丰富和分销数据对我们在该地区的大西洋海象的知识显着增加。考虑到该地区的快速和大规模的工业发展，应采取积极措施来保护山羊半岛地区的关键海象栖息地。

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