Variable postfledging care in a cooperative bird: causes and consequences
Variable postfledging care in a cooperative bird: causes and consequences
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合作鸟类的不同雏鸟后护理：原因和后果
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发表时间：
2007
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
长时间的照顾是一种常见的行为，在许多合作繁殖的物种，并已被证明提供年轻的生存和发展的好处。然而，种内变化的原因，在postfledging护理和这种变化的后果，对年轻的发展仍然不清楚。在这里，我们调查的因素影响的持续时间后，在合作繁殖的画眉（Turdoides bicolor）照顾。我们表明，护理的持续时间是可变的（40- 97天），主要是由护理成本决定的。成年人在一个低的成年：羽翼未丰的比例组无法保持体重期间的小鸡供应，随后停止照顾年轻人早。这对后代的发育有很大的影响：在6个月大的时候，接受更长时间照顾的幼鸟比他们的同龄人获得了更高的觅食效率和体重。幼鸟出生后的照顾时间也有长期的影响，接受较长时间的幼鸟照顾的个体更有可能成功地从纳塔尔群体中分离出来。这有重要的健身影响，成功的传播者成为繁殖活跃在较早的年龄比他们的“失败的传播者”的同行。这些研究结果强调了在评估合作社会中长时间的产后护理对后代健康和发展的益处时，考虑长期影响的重要性。版权所有2007年，牛津大学出版社。
Prolonged postfledging care is a commonly observed behavior in many cooperatively breeding species and has been shown to provide young with both survival and developmental benefits. However, the causes of intraspecific variation in postfledging care and the consequences of this variation on the development of young remain unclear. Here we investigate factors affecting the duration of postfledging care in the cooperatively breeding pied babbler (Turdoides bicolor). We show that the duration of care is variable (40--97 days) and is determined primarily by the cost of care. Adults in groups with a low adult:fledgling ratio were unable to maintain body mass during the period of chick provisioning and subsequently ceased care of young earlier. This had a strong influence on offspring development: fledglings that received longer periods of care attained higher foraging efficiency and body mass than their counterparts at 6 months of age. The duration of postfledging care also had long-term effects, with individuals that received longer periods of postfledging care more likely to successfully disperse from their natal group. This had important fitness implications as successful dispersers became reproductively active at an earlier age than their "failed-disperser" counterparts. These findings highlight the importance of considering long-term influences when assessing the benefits of prolonged postfledging care on offspring fitness and development in cooperative societies. Copyright 2007, Oxford University Press.