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首页> 外文期刊>The Journal of Experimental Biology >Switch to diester preen waxes may reduce avian nest predation by mammalian predators using olfactory cues
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Switch to diester preen waxes may reduce avian nest predation by mammalian predators using olfactory cues

机译：改用二酯装蜡可能会降低哺乳动物捕食者利用嗅觉提示造成的鸟巢捕食

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摘要

It has long been recognised that nest depredation by olfactory-searching mammals greatly influences the reproductive success of ground-nesting birds. Yet adaptations of birds to diminish smell during nesting have rarely been investigated. Recently, a remarkable shift in the composition of uropygial gland secretions (preen waxes) was discovered in many ground-nesting shorebirds and ducks that begin incubation, during which the usual mixtures of monoester preen waxes are replaced by mixtures of less volatile diester waxes. In this study we show experimentally that an olfactory-searching dog had greater difficulty detecting mixtures of the less volatile diesters than mixtures of monoesters. This is consistent with the hypothesis that diester preen waxes reduce birds' smell and thereby reduce predation risk.
机译：长期以来，人们一直认为嗅觉搜寻哺乳动物对巢的掠夺会极大地影响地面筑巢鸟类的繁殖成功。然而，很少有人研究过鸟在筑巢过程中减少气味的适应性。最近，在开始孵化的许多地面筑巢的duck鸟和鸭子中发现了尿secret腺分泌物成分的显着变化，在此期间，单酯类先质蜡的通常混合物被挥发性较小的二酯蜡的混合物代替。在这项研究中，我们从实验上表明，嗅嗅狗比单酯混合物难于检测挥发性较低的二酯混合物。这与二酯假装蜡减少鸟类气味并从而降低捕食风险的假设相符。

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