Familiarity breeds success: pairs that meet earlier experience increased breeding performance in a wild bird population.
Familiarity breeds success: pairs that meet earlier experience increased breeding performance in a wild bird population.
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DOI：
10.1098/rspb.2020.1554
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发表时间：
2020-12-23
期刊：
影响因子：
--
通讯作者：
Hinde CA
中科院分区：
文献类型：
--
作者：
Culina A;Firth JA;Hinde CA
在社会性一夫一妻制的动物中，包括人类，在开始繁殖之前，伴侣可以见面并共度时光。然而，在自然种群中研究繁殖前阶段一直具有挑战性，因此在很大程度上尚未探索。因此，我们对配偶熟悉的好处的理解几乎完全限于对与特定伴侣重复繁殖的评估。在这里，我们使用精细规模的跟踪技术，收集6年的数据繁殖前的社会协会单独标记的大山雀在野生种群。我们发现，在冬天早些时候遇到的对在所有年份中都提前产卵。窝卵数、孵化数和幼鸟羽化数以及孵化和羽化成功率不受父母见面时间的直接影响，而是间接影响：较早产蛋的对有较大的窝卵数（也产生较高的幼鸟数），孵化和羽化成功率较高。我们没有发现初始配对期的长短对未来的交配决定（与伴侣在一起或离婚）有直接影响。这些发现表明，一对新的伴侣更早开始交往（或者个体与他们认识更长时间的伴侣交配）具有选择性优势。我们需要更多的研究来探讨第一次繁殖前的配对熟悉度的适应性效应的普遍性，并阐明这些效应的机制。
In socially monogamous animals, including humans, pairs can meet and spend time together before they begin reproduction. However, the pre-breeding period has been challenging to study in natural populations, and thus remains largely unexplored. As such, our understanding of the benefits of mate familiarity is almost entirely limited to assessments of repeated breeding with a particular partner. Here, we used fine-scale tracking technology to gather 6 years of data on pre-breeding social associations of individually marked great tits in a wild population. We show that pairs which met earlier in the winter laid their eggs earlier in all years. Clutch size, number of hatched and fledged young, and hatching and fledging success were not influenced by parents' meeting time directly, but indirectly: earlier laying pairs had larger clutches (that also produce higher number of young), and higher hatching and fledging success. We did not detect a direct influence of the length of the initial pairing period on future mating decisions (stay with a partner or divorce). These findings suggest a selective advantage for a new pair to start associating earlier (or for individuals to mate with those they have known for longer). We call for more studies to explore the generality of fitness effects of pair familiarity prior to first breeding, and to elucidate the mechanisms underlying these effects.
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