Long sperm fertilize more eggs in a bird.
Long sperm fertilize more eggs in a bird.
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DOI：
10.1098/rspb.2014.1897
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发表时间：
2015-01-22
期刊：
影响因子：
--
通讯作者：
Birkhead T
中科院分区：
文献类型：
--
作者：
Bennison C;Hemmings N;Slate J;Birkhead T
精子竞争，即多个雄性的射精竞争使雌性的卵子受精，导致对精子性状的强烈选择。虽然已知精子大小和游泳速度独立影响某些物种的受精成功，但探索精子长度，游泳速度和受精成功之间的关系仍然是一个挑战。在这里，我们使用斑胸草雀（Taeniopygia guttata），精子大小影响精子游泳速度，以确定精子总长度对受精成功的影响。在精子竞争实验中，雄性的精子只在长度和游泳速度上不同，结果表明，产生长精子的雄性在（i）到达卵子的精子数量和（ii）捕获这些卵子方面更成功。我们的研究结果表明，虽然精子长度是决定精子竞争结果的主要因素，但男性和女性生殖特征之间的复杂相互作用也可能很重要。这些相互作用的机制知之甚少，但我们认为，精子储存和利用的女性的差异可能有助于精子竞争的结果。
Sperm competition, in which the ejaculates of multiple males compete to fertilize a female's ova, results in strong selection on sperm traits. Although sperm size and swimming velocity are known to independently affect fertilization success in certain species, exploring the relationship between sperm length, swimming velocity and fertilization success still remains a challenge. Here, we use the zebra finch (Taeniopygia guttata), where sperm size influences sperm swimming velocity, to determine the effect of sperm total length on fertilization success. Sperm competition experiments, in which pairs of males whose sperm differed only in length and swimming speed, revealed that males producing long sperm were more successful in terms of (i) the number of sperm reaching the ova and (ii) fertilizing those ova. Our results reveal that although sperm length is the main factor determining the outcome of sperm competition, complex interactions between male and female reproductive traits may also be important. The mechanisms underlying these interactions are poorly understood, but we suggest that differences in sperm storage and utilization by females may contribute to the outcome of sperm competition.
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影响因子：
2.3
作者：
Burness, G;Casselman, SJ;Montgomerie, R
通讯作者：
Montgomerie, R
影响因子：
3.7
作者：
Calhim, Sara;Double, Michael C.;Cockburn, Andrew
通讯作者：
Cockburn, Andrew
影响因子：
3.3
作者：
Fitzpatrick, John L.;Garcia-Gonzalez, Francisco;Evans, Jonathan P.
通讯作者：
Evans, Jonathan P.
影响因子：
--
作者：
CARDULLO, RA;BALTZ, JM
通讯作者：
BALTZ, JM
后性性选择与精子形态变化的降低有关。
影响因子：
3.7
作者：
Calhim, Sara;Immler, Simone;Birkhead, Tim R.
通讯作者：
Birkhead, Tim R.