Nest-building males trade off material collection costs with territory value
Nest-building males trade off material collection costs with territory value
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DOI：
10.1071/mu15022
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发表时间：
2016-01-01
影响因子：
1.3
通讯作者：
Healy, Susan D.
中科院分区：
文献类型：
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作者：
Bailey, Ida E.;Morgan, Kate V.;Healy, Susan D.
对许多鸟类来说，建造一个结构坚固的巢对繁殖成功至关重要。然而，我们对鸟类选择材料的标准以及它们去哪里收集材料知之甚少。在这里我们观察了雄性角织虫（Ploceus capensis）的材料收集。雄性通常选择长而结实的材料筑巢，每只雄性从不同的地方收集材料。与筑巢较少的雄鸟相比，筑巢较多的雄鸟会在群体的不同区域筑巢，并飞得更远来收集筑巢材料。由于这些飞得更远的雄鸟有更长的尾巴和翅膀，比飞得更近的雄鸟吸引了更多的雌鸟到它们的领地，它们可能在收集巢穴材料的旅行成本和在更理想的领地上占有地盘的好处之间进行了权衡。因此，筑巢似乎是一项多维度的任务，鸟类需要考虑材料的结构特性、材料与筑巢地点的接近程度和领地质量。这样做的雄性既能有效地吸引更多的配偶，也能为它们的后代提供结构健全的巢穴。
Building a structurally robust nest is crucial for reproductive success in many birds. However, we know little about the criteria birds use to select material or where they go to collect it. Here we observed the material collection of male Cape Weavers (Ploceus capensis). Males typically selected long, strong material to build their nests and each male collected material from different locations. Males that built more nests nested in a different area of the colony and flew further to collect nest material than did males that built fewer nests. As these males that flew further to collect material had longer tails and wings and attracted more females to their territories than did males that flew shorter distances, they may have traded off the travel costs of collecting nest materials with benefits gained from holding a territory in a more desirable' part of the colony. Nest construction, then, appears to be a multi-dimensional task whereby birds take into account material's structural properties, material proximity to the nest site and territory quality. Males that do this effectively both attract more mates and provide structurally sound nests for their young.