Sperm swimming velocity predicts competitive fertilization success in the green swordtail Xiphophorus helleri.
Sperm swimming velocity predicts competitive fertilization success in the green swordtail Xiphophorus helleri.
复制标题
DOI：
10.1371/journal.pone.0012146
复制
发表时间：
2010-08-13
期刊：
影响因子：
3.7
通讯作者：
Evans JP
中科院分区：
文献类型：
--
作者：
Gasparini C;Simmons LW;Beveridge M;Evans JP
精子竞争预计将有利于影响精子性能的特征的进化，当精子竞争使雌性卵子受精时。虽然有相当多的证据表明，选择有利于精子数量的增加，但人们对精子质量如何有助于竞争性受精成功的了解要少得多。在这里，我们确定精子质量的差异是否会影响绿剑尾鱼的竞争性受精成功，剑尾鱼是一种高度混杂的有生命的鱼类。我们使用人工授精作为一种控制精子传递的方法，并表明当两个雄性射出的精液竞争使雌性卵子受精时，精子游泳速度是受精成功的主要决定因素。相比之下，我们没有发现任何证据表明精子长度对父本成功有任何影响。我们也没有发现交配前和交配后的性特征在这个物种中表现出整合的证据，这表明之前的观察结果表明，生殖扭曲倾向于交配率高的雄性，这不太可能是由于精子质量和雄性性别装饰之间的任何直接联系。
Sperm competition is expected to favour the evolution of traits that influence the performance of sperm when they compete to fertilize a female's eggs. While there is considerable evidence that selection favours increases in sperm numbers, much less is known about how sperm quality contributes towards competitive fertilization success. Here, we determine whether variation in sperm quality influences competitive fertilization success in the green swordtail Xiphophorus helleri, a highly promiscuous livebearing fish. We use artificial insemination as a method of controlled sperm delivery and show that sperm swimming velocity is the primary determinant of fertilization success when ejaculates from two males compete to fertilize a female's eggs. By contrast, we found no evidence that sperm length had any effect on siring success. We also found no evidence that pre- and postcopulatory sexual traits were phenotypically integrated in this species, suggesting that the previous observation that reproductive skew favours males with high mating rates is unlikely to be due to any direct association between sperm quality and male sexual ornamentation.
登录
查看更多内容
DOI：
10.1098/rspb.2000.1577
发表时间：
2001-04-07
影响因子：
4.7
作者：
Evans, JP;Magurran, AE
通讯作者：
Magurran, AE
DOI：
10.1098/rspb.2000.1037
发表时间：
2000-03-22
影响因子：
4.7
作者：
Edvardsson, M;Arnqvist, G
通讯作者：
Arnqvist, G
影响因子：
2.5
作者：
BASOLO A L
通讯作者：
BASOLO A L
DOI：
10.1073/pnas.0809990106
发表时间：
2009-01-27
影响因子：
11.1
作者：
Fitzpatrick, John L.;Montgomerie, Robert;Balshine, Sigal
通讯作者：
Balshine, Sigal
DOI：
10.1098/rspb.1997.0099
发表时间：
1997-05-22
影响因子：
4.7
作者：
Matthews, IM;Evans, JP;Magurran, AE
通讯作者：
Magurran, AE