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首页> 外文期刊>Zoological Science >Do Parental Feeding Rate and Feeding Synchrony Affect Nest Survival in a Songbird?
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Do Parental Feeding Rate and Feeding Synchrony Affect Nest Survival in a Songbird?

机译：父母喂养率和喂食同步会影响歌曲的巢生存吗？

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摘要

Nest predation risk is an important factor that may promote the evolution of adaptive parental reproductive strategies in animals. In altricial birds, where parents feed their offspring at the nest for a period of time, parent birds must balance the benefit from increased nest visits and the cost from increased nest predation resulting from their nest visits being detected by predators. Empirical evidence has shown a relationship between parental nest visits and nest predation risks, and parents have been found to be able to reduce the chance of being detected by predators by synchronizing their feeding visits while maintaining feeding rate unchanged. However, it remains poorly understood whether the relationships are universal to all species. We investigated whether nest survival is correlated with parental feeding rate and feeding synchrony in the silver-throated tit (Aegithalos glaucogularis), a songbird endemic to China. We found that parental feeding rate varied by brood size, nestling age and the time during the day, but feeding synchrony was unrelated to the above factors. Moreover, we showed no effect of parental feeding rate or synchrony on nest survival. The failure to find a relationship between parental feeding synchrony and nest survival seems exceptional because it is contrary to findings of previous studies. While there was likely a publication bias regarding previous studies, it is also possible that the evolution of feeding synchrony in different species has different explanations, or the complexity of the predator community and other factors affecting nest survival need to be considered in the analyses.
机译：巢穴捕食风险是可能促进动物适应性亲本繁殖策略进化的一个重要因素。在候鸟中，父母在巢中喂养后代一段时间，父母鸟必须平衡增加的筑巢次数带来的好处和被捕食者发现的筑巢次数带来的巢捕食增加带来的成本。经验证据表明，亲本的巢穴访问与巢穴捕食风险之间存在关系，并且发现亲本能够通过同步它们的进食访问，同时保持进食率不变，从而减少被捕食者发现的机会。然而，人们对这种关系是否对所有物种都是普遍的还知之甚少。我们研究了中国特有的鸣禽银喉山雀（Aegithalos glaucogularis）的巢存活率是否与亲代摄食率和摄食同步性相关。我们发现，父母的喂养率因育儿规模、雏鸟年龄和白天的时间而异，但喂养同步性与上述因素无关。此外，我们没有发现父母喂养率或同步性对巢穴存活率的影响。未能找到父母喂食同步性和巢穴存活之间的关系似乎是例外，因为这与之前的研究结果相反。虽然之前的研究可能存在发表偏倚，但也有可能不同物种的摄食同步性进化有不同的解释，或者在分析中需要考虑捕食者群落的复杂性和其他影响巢穴生存的因素。

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