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首页> 外文期刊>Polar biology >A gravel-covered iceberg provides an offshore breeding site for ivory gulls Pagophila eburnea off Northeast Greenland
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A gravel-covered iceberg provides an offshore breeding site for ivory gulls Pagophila eburnea off Northeast Greenland

机译：砾石覆盖的冰山为东北格陵兰岛附近的象牙海鸥Pagophila eburnea提供了近海繁殖场所

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The ivory gull Pagophila eburnea is an Arctic seabird species whose distribution is tightly coupled to the availability of sea ice. During the last decades, strong declines have been reported for breeding colonies in Canada and Greenland, which are usually located on nunataks or remote coastal islands. Here, we report the observation of a colony of ivory gulls breeding on a gravel-covered iceberg 70 km off Northeast Greenland in August 2014. It concerned approximately 60 adults, including two ringed individuals, and many chicks. This represents an unusual breeding site for the species, to be compared with a few cases of colonies on gravel-covered sea ice. Breeding on an offshore iceberg may be advantageous since it provides ultimate protection from predators. Furthermore, the proximity to the productive North East Water polynya may have been attractive to these gulls. As a consequence of this and previous observations, colony surveys should not solely focus on inland and coastal breeding habitats, but should be extended towards the ocean.
机译：象牙海鸥Pagophila eburnea是一种北极海鸟物种，其分布与海冰的可获得性紧密相关。在过去的几十年中，据报道加拿大和格陵兰岛的繁殖地通常都在努纳塔克人或偏远的沿海岛屿上，其繁殖地急剧下降。在这里，我们报告了2014年8月在东北格陵兰岛以南70公里的砾石覆盖的冰山上繁殖的一个象牙海鸥殖民地的观察结果。它涉及大约60只成年动物，其中包括两只带环的个体和许多小鸡。这是该物种的不寻常繁殖地，可与一些在砾石覆盖的海冰上的菌落进行比较。在近海冰山上进行繁殖可能是有利的，因为它可以提供对捕食者的最终保护。此外，靠近生产性东北水域的多年生动物可能对这些海鸥很有吸引力。由于此和先前的观察结果，殖民地调查不应仅集中于内陆和沿海繁殖栖息地，而应扩展到海洋。

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