Task partitioning increases reproductive output in a cooperative bird
Task partitioning increases reproductive output in a cooperative bird
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任务划分增加了合作鸟类的繁殖产出
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
N. Raihani
中科院分区：
文献类型：
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作者：
A. Ridley;N. Raihani
父母往往面临着产仔质量和产仔数量之间的权衡，因为停止对当前产仔的投资可能会导致较低的存活率和未来的繁殖成功率，而启动新的繁殖尝试可能会产生更多的产仔。在合作繁殖物种中，帮助者可以通过承担第一窝后代的主要照顾者的角色来缓解这种权衡，解放繁育者开始后续的繁殖尝试，而不会影响后代受到的照顾水平。在这里，我们调查了在合作繁育的花斑鱼(Turdoidesbiolor)中出现的孵化重叠的发生和后果。幼崽重叠只在群体中发生，导致繁育者主要投资于第二窝幼崽，而帮助者继续为第一窝幼崽提供照顾，导致来自重叠幼崽的依赖幼崽被同时抚养。在繁育交叠期间进行育苗的亲子间分配，在不影响后代存活的情况下，每个季节以群体(参见，对)产生更多的幼崽，因此，在合作繁殖物种中，任务分配具有繁殖效益。版权所有2008，牛津大学出版社。
Parents often face a trade-off between the quality and quantity of young produced because terminating investment in current young could result in lower survival and future reproductive success, whereas initiating new breeding attempts could result in greater production of young. In cooperatively breeding species, helpers may alleviate this trade-off by assuming the role of primary caregivers to first broods, liberating breeders to initiate subsequent breeding attempts without compromising the level of care offspring receive. Here, we investigate the occurrence and consequences of brood overlap in the cooperatively breeding pied babbler (Turdoides bicolor). Brood overlap occurred only in groups and resulted in breeders primarily investing in second broods while helpers continued to provide care to first broods, resulting in dependent young from overlapping broods being raised simultaneously. Interbrood partitioning of care during brood overlap resulted in a greater production of young per season in groups (cf., pairs) without any effect on offspring survival, thus representing a reproductive benefit of task partitioning in cooperatively breeding species. Copyright 2008, Oxford University Press.