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首页> 外文期刊>Polar biology >Aggressive neighbors and dense nesting: nest site choice and success in high-Arctic common eiders
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Aggressive neighbors and dense nesting: nest site choice and success in high-Arctic common eiders

机译：进取的邻居和密集的筑巢：筑巢地点的选择和在高北极常见绒鸭中的成功

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摘要

Minimizing the risk of nest predation has led some bird species to exploit the nest defense behavior of other species. At Nasaruvaalik Island, Nunavut, Canada, some common eiders (Somateria mollissima borealis) nest within the boundaries of Arctic tern (Sterna paradisaea) colonies, while others nest elsewhere on the island, away from the terns. We tested the effects of location (within vs. outside the tern colonies), density of common eider nests, and annual variation on the nesting parameters of common eiders. Our results suggest that nesting in association with Arctic terns does not confer an obvious benefit to eiders. Such associative nesting of eiders and terns may be the result of overlapping habitat preferences between the two species, or a general scarcity of suitable nesting habitat for ground-nesting species in the high Arctic. However, eiders nesting in higher densities with other eiders had greater nest success and lower total clutch predation, indicating a positive correlation between nest density and success.
机译：将鸟巢捕食的风险降至最低已导致某些鸟类利用其他物种的鸟巢防御行为。在加拿大努纳武特的纳萨鲁瓦利克岛，北极北极燕鸥（Sterna paradisaea）殖民地的边界内筑有一些常见的绒毛（Somateria mollissimaborealis），而燕鸥则在岛上其他地方筑巢。我们测试了位置（燕鸥殖民地内部或外部），常见绒鸭巢的密度以及年度变化对常见绒鸭巢参数的影响。我们的研究结果表明，与北极燕鸥相关的筑巢不会给绒鸭带来明显的好处。绒毛和燕鸥的这种联合筑巢可能是两种物种之间栖息地偏好重叠的结果，或者是北极高海拔地区的地面筑巢物种普遍缺乏合适的筑巢栖息地的结果。但是，与其他羽绒一样高密度筑巢的羽绒具有更大的成巢成功率和更低的总离合掠食性，表明巢密度与成功成正比。

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