Male aerial display and reversed sexual size dimorphism in the dunlin
Male aerial display and reversed sexual size dimorphism in the dunlin
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DOI：
10.1006/anbe.1997.0532
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发表时间：
1997-11-01
期刊：
影响因子：
2.5
通讯作者：
Flodin, LA
中科院分区：
文献类型：
--
作者：
Blomqvist, D;Johansson, OC;Flodin, LA
性别大小二态颠倒，雄性比雌性小，在涉水动物中很常见。空中表演假说表明，在雄性表演飞行的物种中，雄性的性选择倾向于空中敏捷性，因此体型较小。我们在Calidris高山的dunlin测试了这个假设。在早期繁殖季节，展示飞行并不常见，但当雌性开始产卵时，展示飞行明显增加。雄性的展示区域很大程度上重叠，展示飞行似乎主要是向潜在配偶发出的广告信号。显示率，以及在空中显示的时间所占的比例，随着雄性体型的减小而增加。在空中表演中，体型较小的雄性也比体型较大的雄性更频繁地进行昂贵的悬停飞行，飞行时间也相对更长。这些结果支持了空中展示假说。(C) 1997动物行为研究协会。
Reversed sexual size dimorphism, with males smaller than females, is common in waders. The aerial display hypothesis suggests that sexual selection in males favours aerial agility, and hence small size, in species with male display flights. We tested this hypothesis in the dunlin, Calidris alpina. Display flights were uncommon in the early breeding season but increased markedly when females began laying. Male display areas were largely overlapping, and display flight seemed to be mainly an advertising signal to potential mates. Display rate, as well as proportion of time spent in aerial display, increased with decreasing male size. During aerial display, small males also performed costly hovering flights more often and for relatively longer than large males. These results support the aerial display hypothesis. (C) 1997 The Association of the Study of Animal Behaviour.