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Diet of black guillemots and northern fulmars breeding beside a High Arctic polynya

机译：黑色北极海豚和北部海mar繁殖的饮食，位于北极高沼地附近

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摘要

In the Arctic, the availability of early-season open water (shore leads, polynyas) is a key factor influencing annual reproduction by marine birds, as these relatively productive locations provide the only sites where migrating and breeding birds can feed. We examined the diet of two marine birds, black guillemots (Cepphus grylle) and northern fulmars (Fulmarus glacialis), feeding in the Hell Gate-Cardigan Strait Polynya in the Canadian High Arctic during the breeding seasons of 1980-1984. There was little overlap in prey items consumed between these two species, except that both relied on similar sympagic amphipods. Guillemots fed principally on benthic prey, and compared to earlier High Arctic studies, they consumed proportionally more benthic fish, mysids and decapods. Fulmars appeared to feed on swarms of pelagic or surface prey, and in this polynya they consumed proportionally fewer fish and more polychaetes than has been reported for fulmars at other High Arctic locations. Given that climate change may alter marine food webs by changing the types and availability of prey, our results set a baseline of dietary information for these predators against which future conditions can be compared.
机译：在北极地区，早期开放水域（岸边铅，多尼亚亚）的可利用性是影响海鸟每年繁殖的关键因素，因为这些相对高产的地区是唯一可以迁徙和繁殖鸟类觅食的场所。我们检查了两只海鸟的饮食，它们是黑海雀（Cepphus grylle）和北海mar（Fulmarus glacialis），在1980-1984年的繁殖季节以加拿大高北极地区的地狱之门-开襟海峡波利尼亚为食。在这两个物种之间，所消耗的猎物几乎没有重叠，只是它们都依赖于相似的有症状的两栖动物。海雀科的鹦鹉主要以底栖动物为食，与早期的高北极研究相比，他们按比例食用了更多的底栖鱼类，鱼类和十足动物。短吻海appeared似乎以中上层或表面的猎物为食，在这种多年生动物中，它们食用的鱼类和多壳鱼类成比例地比在其他高北极地区的短吻海豹要多。鉴于气候变化可能会通过改变猎物的类型和可用性来改变海洋食物网，因此我们的结果为这些掠食者的饮食信息设定了基线，可以将其与未来的状况进行比较。

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