Multiply mated males show higher embryo survival in a paternally caring fish
Multiply mated males show higher embryo survival in a paternally caring fish
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多次交配的雄性在父爱照顾的鱼中表现出更高的胚胎存活率
DOI：
10.1093/beheco/arr023
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发表时间：
2011
影响因子：
2.4
通讯作者：
C. Kvarnemo
中科院分区：
文献类型：
--
作者：
Gry Sagebakken;I. Ahnesjö;I. B. Goncalves;C. Kvarnemo
我们探索了在一个雄性亲本照顾的物种中，多配偶对雄性繁殖成功的影响，在这种物种中，雌性交配伴侣数量的增加并不会增加收到的卵子数量。宽鼻管鱼（Syngnathus typhle）有一个一夫多妻制的交配系统。在这个物种中，雄性在一个特别发育的育儿袋里照顾胚胎。在孵蛋期间，有些胚胎不能发育。我们实验雄性与一只或两只雌性交配，同时保持后代大小相似。我们发现单交配雄虫的胚胎存活率明显低于双交配雄虫。此外，与配偶数量无关的较大种群的胚胎存活率相对较低。我们得出的结论是，胚胎存活受到交配后过程的影响，这似乎导致了多次交配的雄性更高的适合度。我们从亲代照顾、兄弟姐妹竞争、遗传利益和亲缘选择的角度来讨论我们的研究结果。牛津大学出版社版权所有。
We explored the effects of multiple mates on male reproductive success in a species with male parental care in which an increase in the number of female mating partners does not increase the number of eggs received. The broad-nosed pipefish (Syngnathus typhle) has a polygynandrous mating system. In this species, the male cares for embryos in a specially developed brood pouch. During brooding, some embryos fail to develop. We experimentally mated males with either one or two females while keeping brood size similar. We found that broods of singly mated males showed significantly lower embryo survival than those of doubly mated males. Furthermore, larger broods showed relatively lower levels of embryo survivorship independent of number of mates. We conclude that embryo survival is affected by postcopulatory processes that appear to result in higher fitness of multiply mated males. We discuss our results in the light of parental care, sibling competition, genetic benefits, and kin selection. Copyright 2011, Oxford University Press.