Increased lifetime reproductive success for Siberian jay (Perisoreus infaustus) males with delayed dispersal
Increased lifetime reproductive success for Siberian jay (Perisoreus infaustus) males with delayed dispersal
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DOI：
10.1098/rspb.1999.0723
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发表时间：
1999-05-07
影响因子：
4.7
通讯作者：
Tegelström, H
中科院分区：
文献类型：
--
作者：
Ekman, J;Bylin, A;Tegelström, H
在拥挤的环境中，出生区域可以作为年轻和没有经验的后代的避风港，直到出现繁殖空缺。延迟分散和与亲属的联系可以通过个体适应度的增加提供适应性利益。在这里，我们报告了西伯利亚松鸦（Perisoreus infaustus）雄性的延迟扩散与更高的终生个体适应度有关。当儿子们推迟分散时，他们繁殖得更成功，并且在生活中有更多的繁殖事件。当儿子在生命后期分散时，较高的终生生殖成功率足以促进出生分散的推迟，这表明分散是由于获得高质量栖息地的生态限制而延迟的。我们认为，这种在扩散时间和繁殖成功方面的变化可以与驱动扩散的非遗传机制相协调。反映生长过程中环境条件的群体内部社会支配就是这样一种机制。
In a crowded environment the natal territory could serve as a haven for young and inexperienced offspring until a breeding vacancy emerges. Delayed dispersal and association with kin could then offer adaptive benefits through an individual fitness gain. Here we report that delayed dispersal is associated with a higher lifetime individual fitness in Siberian jay (Perisoreus infaustus) males. Sons bred more successfully and had more reproductive events in life when they delayed dispersal. The higher lifetime reproductive success when sons disperse later in life is sufficient to promote postponement of natal dispersal, suggesting that dispersal is delay-ed due to ecological constraints on access to high-quality habitats. We argue that the maintenance of this variation in the timing of dispersal and reproductive success can be reconciled with non-genetic mechanisms driving dispersal. Social dominance within broods reflecting environmental conditions during growth is such a mechanism.