Sexual selection, sperm competition and the evolution of sperm length.
Sexual selection, sperm competition and the evolution of sperm length.
复制标题
性选择、精子竞争和精子长度的进化。
DOI：
10.1159/000156751
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
A. Dixson
中科院分区：
文献类型：
--
作者：
A. Dixson
在哺乳动物物种中，雌性在卵巢周期的生育期与许多雄性交配，通过精子竞争进行性选择，导致了更大的睾丸（相对于体重）的进化，并导致射精中活动精子的比例更大[1-4]，因此，在灵长类动物中，具有多雄性交配系统的物种（例如泛穴居动物）或分散， 非群居性交配系统（如 Galago spp.）相对于体重而言，比一夫一妻制的物种（如 Hylobates spp.）或形成一夫多妻制的单雄性单位（如大猩猩）的睾丸更大。相对睾丸尺寸增大主要是由于产生更多精子所需的生精小管体积更大[5]。从理论上讲，帕克
In mammalian species in which females mate with a number of males during the fer tile period of the ovarian cycle, sexual selec tion, via sperm competition, has led to the evolution of larger testes (relative to body weight) and to a greater proportion of motile spermatozoa in the ejaculate [1-4], Thus, among the primates, species with multimale mating systems (eg Pan troglodytes) or dis persed, non-gregarious mating systems (eg Galago spp.) have larger testes relative to body weight than species which are monoga mous (eg Hylobates spp.) or which form polygynous one-male units (eg Gorilla). In creased relative testis size is due primarily to the greater volume of seminiferous tubules required to produce larger numbers of sper matozoa [5]. On theoretical grounds, Parker