Better stay together: pair bond duration increases individual fitness independent of age-related variation
Better stay together: pair bond duration increases individual fitness independent of age-related variation
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DOI：
10.1098/rspb.2013.2843
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发表时间：
2014-07-07
影响因子：
4.7
通讯作者：
Drummond, Hugh
中科院分区：
文献类型：
--
作者：
Sanchez-Macouzet, Oscar;Rodriguez, Cristina;Drummond, Hugh
延长的配对关系有可能通过增加对熟悉度和增强配对成员之间的协调与合作来改善社会性一夫一妻制动物的生殖性能。然而，由于年龄和生育经验等重要的混淆因素，这被证明很难进行可靠的测试。在这里，我们解决以前的研究的局限性，并提供了一个严格的测试，在社会一夫一妻制的蓝脚鲣鸟，苏拉nebouxii，长寿的海鸟与高离婚率的配偶熟悉的效果。利用这个物种的年龄和配对持续时间之间的自然分离，并将一种新的分析方法应用于24年的数据库，我们发现，那些在一起时间较长的配对在本赛季提前5周建立了它们的窝，孵化更多的鸡蛋，并产生35%的雏鸟，无论年龄和繁殖经验如何。我们的研究结果表明，对债券的持续时间增加个人健身，并进一步表明，一个男性和女性的行为之间的协同效应可能参与产生的配偶熟悉的效果。这些发现有助于解释与年龄和经验无关的再交配的好处及其在生活史进化中的作用。
Prolonged pair bonds have the potential to improve reproductive performance of socially monogamous animals by increasing pair familiarity and enhancing coordination and cooperation between pair members. However, this has proved very difficult to test robustly because of important confounds such as age and reproductive experience. Here, we address limitations of previous studies and provide a rigorous test of the mate familiarity effect in the socially monogamous blue-footed booby, Sula nebouxii, a long-lived marine bird with a high divorce rate. Taking advantage of a natural disassociation between age and pair bond duration in this species, and applying a novel analytical approach to a 24 year database, we found that those pairs which have been together for longer establish their clutches five weeks earlier in the season, hatch more of their eggs and produce 35% more fledglings, regardless of age and reproductive experience. Our results demonstrate that pair bond duration increases individual fitness and further suggest that synergistic effects between a male and female's behaviour are likely to be involved in generating a mate familiarity effect. These findings help to explain the age-and experience-independent benefits of remating and their role in life-history evolution.