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首页> 外文期刊>Journal of Avian Biology >Survival of the fattest: body stores on migration and survival in red knots Calidris canutus islandica
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Survival of the fattest: body stores on migration and survival in red knots Calidris canutus islandica

机译：最胖的生存：身体在红色结中的迁移和生存中储存

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摘要

Severe summer weather in Greenland and Arctic Canada in 1972 and 1974 caused very poor breeding success and elevated adult mortality in red knots Calidris canutus islandica. We show that those individual knots that are known to have survived these summers were in better than average nutritional condition shortly before departure from their late spring staging area in west Iceland. The condition index of previously banded or subsequently recovered birds captured in Iceland was positively related to the number of summers they were known to have survived. Body stores carried from the last spring staging area to the breeding grounds appear to offer Arctic-breeding shorebirds significant selective advantages: they are used for physical transformation from migration to breeding condition, and in years when weather is difficult may enable survival after arrival on the breeding grounds.
机译：1972年和1974年加拿大格陵兰岛和北极的夏季严酷天气导致红色结Calidris canutus islandica的繁殖成功非常糟糕，成年死亡率提高。我们表明，那些已知在这些夏天幸存下来的个体结在离开其位于冰岛西部的春末分期区之前不久，处于比平均营养状况更好的状态。在冰岛捕获的先前带状或后来恢复的鸟类的状况指数与已知存活的夏天数量成正相关。从春季末期到繁殖场的尸体库似乎为北极繁殖shore提供了显着的选择优势：它们被用于从迁移到繁殖条件的物理转变，并且在天气困难的年份，到达目的地后可以存活。繁殖地。

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