Parental versus offspring control on food division within the brood: the role of hatching asynchrony
Parental versus offspring control on food division within the brood: the role of hatching asynchrony
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DOI：
10.1111/j.0030-1299.2008.16404.x
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发表时间：
2008-05
期刊：
影响因子：
3.4
通讯作者：
Carlos Rodríguez;K. Johst;J. Bustamante
中科院分区：
文献类型：
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作者：
Carlos Rodríguez;K. Johst;J. Bustamante
使用基于个体的模拟模型，我们研究了多个后代之间不同的食物分配机制如何影响雏鸟的数量和质量以及亲本的努力。我们考虑食物供应（喂养条件）、孵化异步和食物分配等不同场景的组合。如果父母能够完全控制如何在后代之间分配食物，那么在各种饲养条件下，异步孵化比同步孵化具有更高的繁殖性能，这为经验证明的异步孵化的好处提供了理论支持。如果父母接受兄弟姐妹竞争的结果，则喂养条件存在一个阈值，低于该阈值，异步育雏会产生更多的雏鸟，而高于该阈值则相反。有趣的是，依赖雏鸟竞争结果的父母在繁殖表现上并不一定不同于那些完全控制食物分配的父母。我们的研究将孵化异步、父母的供给行为、雏鸟的推挤行为和喂养条件结合起来，作为一个非常有趣的相互作用过程网络，以充分理解亲子冲突。
Using an individual-based simulation model we study how different mechanisms of food division among multiple offspring influence nestling number and quality, as well as parental effort. We consider the combination of different scenarios of food availability (feeding conditions), hatching asynchrony and food division. If parents have full control on how to divide food among offspring, asynchronous broods have higher breeding performance than synchronous ones in a wide range of feeding conditions, giving theoretical support to empirically proved benefits of hatching asynchrony. If parents accept the outcome of sibling competition there is a threshold in feeding conditions below which asynchronous broods produced more fledglings and the reverse was true above the threshold. Interestingly, parents relying on the outcome of nestling competition do not necessarily differ in breeding performance from those which have full control over food allocation. Our study combines hatching asynchrony, provisioning behaviour of parents, jostling behaviour of nestlings and feeding conditions as a network of interacting processes of enormous interest to fully understand the parent-offspring conflict.