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首页> 外文期刊>The Royal Society Proceedings B: Biological Sciences >Determinants of paternity in a butterfly.
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Determinants of paternity in a butterfly.

机译：亲子关系的决定因素。

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The male mating history of Pieris rapae was manipulated to examine the effect of spermatophore size and spermatozoa numbers on male fertilization success. Overall, paternity showed either first male or, more frequently, second male spermatozoa precedence. Previously mated males had significantly higher fertilization success in competition with males mating for the first time, strongly suggesting that high spermatozoa number is advantageous in spermatozoa competition. Male size also affected paternity with relatively larger males having higher fertilization success. This may indicate that spermatophore size influences paternity, because in virgin males spermatophore size correlates with male size. The paternity of an individual male was also inversely correlated with the mass of his spermatophore remains dissected out of the female. This suggested that females may influence paternity by affecting the rate of spermatophore drainage. Although the possibility of female postcopulatory choice remains to be explored, these results clearly show that males maximize their fertilization success by increasing the number of spermatozoa in their second mating.
机译：操纵菜青虫的雄性交配史以检查精子大小和精子数量对雄性受精成功的影响。总体而言，父子关系显示出男性为第一男性，或更常见的是男性为第二男性。先前交配的雄性与第一次交配的雄性在竞争中的受精成功率显着提高，这强烈表明，较高的精子数量在精子竞争中是有利的。男性的体型也影响父亲的父亲，相对较大的男性受精成功率更高。这可能表明精子细胞的大小会影响亲子关系，因为在处女男性中，精子细胞的大小与男性的大小有关。男性个体的亲子关系与从女性中分离出的精子的质量成反比。这表明女性可能通过影响精子引流率而影响亲子关系。尽管雌性交配选择的可能性仍有待探索，但这些结果清楚地表明，雄性通过增加其第二次交配中的精子数量，最大限度地提高了受精成功率。

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