Taylor Martin I, Morley Josephine Isabelle, Rico Ciro, Balshine Sigal
School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK.
Mol Ecol. 2003 Nov;12(11):3173-7. doi: 10.1046/j.1365-294x.2003.01964.x.
In this study, we investigate whether apparent social monogamy (where a species forms a pair bond but may participate in copulations outside the pair bond) corresponds with genetic monogamy (where individuals participate only in copulations within a pair bond) in a biparental mouthbrooding cichlid fish, Eretmodus cyanostictus, from Lake Tanganyika, Africa. Our findings suggest that E. cyanostictus is both socially and genetically monogamous and that monogamy may result from limited opportunities for polygyny, rather than from reproductive benefits of monogamy. Mating systems are believed to influence the relative rate of dispersal of the sexes, and our results suggest that E. cyanostictus displays female-biased dispersal, providing some support for the 'resource competition' hypothesis driving sex-biased dispersal.
在本研究中，我们调查了在一种来自非洲坦噶尼喀湖的双亲口育丽鱼科鱼类——蓝点埃氏丽鱼中，表面上的社会一夫一妻制（即一个物种形成配偶关系，但可能会在配偶关系之外参与交配）是否与基因上的一夫一妻制（即个体仅在配偶关系内参与交配）相对应。我们的研究结果表明，蓝点埃氏丽鱼在社会行为和基因层面上都是一夫一妻制的，并且一夫一妻制可能是由一夫多妻制机会有限导致的，而非一夫一妻制的生殖益处所致。交配系统被认为会影响两性的相对扩散率，我们的结果表明蓝点埃氏丽鱼表现出雌性偏向的扩散，这为驱动性别偏向扩散的“资源竞争”假说提供了一些支持。
