Parent presence, delayed dispersal, and territory acquisition in the Seychelles warbler
Parent presence, delayed dispersal, and territory acquisition in the Seychelles warbler
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DOI：
10.1093/beheco/arm047
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发表时间：
2007-09-01
影响因子：
2.4
通讯作者：
Komdeur, J.
中科院分区：
文献类型：
--
作者：
Eikenaar, C.;Richardson, D. S.;Komdeur, J.
父母在纳塔尔地的存在可能会发挥重要的作用，但往往被忽视，纳塔尔分散和随之而来的收购领域。与父母生活在一个地区可能会通过父母的裙带关系行为或通过帮助抚养非后代亲属而获得的间接利益，为下属提供健康优势。当父母中的一方被继父母取代时，这种优势就会减少或消失，结果，下属可能会分散。在父母更换后分散的下属可能会在分散的时间上受到限制，这可能会产生负面的适应性后果。在合作繁殖的塞舌尔莺，我们表明，当父母自然取代或实验删除，随后由继父母从外地取代领土，下属更容易分散比当父母双方都留在纳塔尔领土此外，从一个或两个父母都被取代的地区分散的下属比分散的下属更不可能获得繁殖者的职位当时父母都还在纳塔尔地我们的研究结果表明，父母在纳塔尔领土的存在可能会促进延迟分散，并促进最终收购的繁殖者的位置纳塔尔领土外我们的研究结果支持的想法，即长期的父母照顾，长寿的物种能够提供，可能选择了家庭生活。
The presence of parents in the natal territory may play an important, but often overlooked, role in natal dispersal and the consequent acquisition of a territory. Living with parents in a territory may confer a fitness advantage to subordinates through, for example, the nepotistic behavior of the parents or indirect benefits gained by helping to raise nondescendent kin. When a parent is replaced by a stepparent, such advantages are reduced or disappear and, as a result, subordinates may disperse. Subordinates that disperse after parent replacement may be constrained in their timing of dispersal, which could have negative fitness consequences. In the cooperatively breeding Seychelles warbler, we show that when a parent was naturally replaced or experimentally removed and subsequently replaced by a stepparent from outside the territory, subordinates were more likely to disperse than when both parents remained in the natal territory Furthermore, subordinates dispersing from territories in which one or both parents had been replaced were less likely to acquire a breeder position than subordinates dispersing when both parents were still on the natal territory. Our findings suggest that the presence of parents in the natal territory may promote delayed dispersal and facilitate the eventual acquisition of a breeder position outside the natal territory Our results support the idea that the prolonged parental care, which long-lived species are able to provide, may have selected for family living.