An experiment on the function of the long-term pair bond period in the socially monogamous bearded reedling
An experiment on the function of the long-term pair bond period in the socially monogamous bearded reedling
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DOI：
10.1016/j.anbehav.2011.09.016
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发表时间：
2011-12-01
期刊：
影响因子：
2.5
通讯作者：
Hoi, Herbert
中科院分区：
文献类型：
--
作者：
Griggio, Matteo;Hoi, Herbert
配对关系持续时间和年龄被认为是长期一夫一妻制配对繁殖成功的重要决定因素。然而，这两种效应通常很难分开，而且实验方法也很少。我们通过实验检验了在控制年龄和经验的情况下，延长配对关系期对髯鳅 Panurus biarmicus 的作用。在该物种中，幼年成对形成，通常终生保持稳定。我们在第一个繁殖季节之前通过实验操纵鸟舍配对的配对形成期，并观察不同配对关系持续时间对繁殖成功、雄性亲本努力和繁殖协调的影响。这是针对长（6.5 个月）、中（4 个月）和短（2 周）形成期的配对进行的。我们的结果表明，结合期的长短不会影响雄性亲本的努力，因为形成期中等和较短的雄性不会减少其亲本在筑巢、孵化或雏鸟供应方面的努力。然而，当配对关系期较长时，配对伙伴的协调（就同时开始筑巢而言）发生得更频繁，而且这些配对也更早开始繁殖。与具有中短形成期的配对相比，具有长债券的配对在繁殖尝试中更容易成功，并且孵化和雏鸟成功率更高。因此，我们的结果支持这样的假设：配对关系的持续时间可能会在繁殖开始之前改善配对内的协调，从而可能导致繁殖成功率提高。 (C) 2011 年动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
Pair bond duration and age are suggested to be important determinants for reproductive success in long-term monogamous pair bonding. These two effects are generally difficult to separate, however, and experimental approaches are scarce. We experimentally examined the role of the extended pair bond period, controlling for age and experience, in the bearded reedling, Panurus biarmicus. In this species pairs form in juvenile flocks and usually remain stable for life. We experimentally manipulated the pair-formation period in aviary pairs prior to their first breeding season and observed the effect of varying pair bond duration on breeding success, male parental effort and breeding coordination. This was done for pairs with long (6.5 months), medium (4 months) and short (2 weeks) formation periods. Our results suggest that the length of the bonding period does not influence male parental effort, as males with medium and short formation periods did not reduce their parental effort in nest building, during incubation or in nestling provisioning. Nevertheless, coordination of pair partners (in terms of simultaneous start of nest building) occurred more often when the pair bond period was long, and these pairs also started breeding earlier. Pairs with long bonds succeeded more often in breeding attempts and had higher hatching and fledging success than pairs with medium and short formation periods. Thus, our results support the hypothesis that the duration of the pair bond may improve coordination within a pair before the start of breeding and thereby may result in enhanced reproductive success. (C) 2011 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.