Male control of mating duration following exposure to rivals in fruitflies.
Male control of mating duration following exposure to rivals in fruitflies.
复制标题
DOI：
10.1016/j.jinsphys.2013.05.011
复制
发表时间：
2013-08
影响因子：
2.2
通讯作者：
Chapman T
中科院分区：
文献类型：
--
作者：
Bretman A;Westmancoat JD;Chapman T
许多生殖特征是两性共有的。共同的特征可以受到两性或仅一种性别的影响。我们确定了男性特定的控制交配持续时间在果蝇的性竞争。男性特定的控制与显着的男性健身的好处，并可能会出现，因为性冲突。许多物种的雄性会评估精子竞争的可能水平，并做出适应性的反应，例如通过增加它们提供的求爱水平，通过转移更多的精子或精液或延长交配时间。从机械的角度来看，男性可能更容易调整他们的投资水平，以适应精子竞争男性有限的特征，如精子和精液生产，他们可以控制。然而，对于共同的特征，如交配持续时间，这是在一个水平上表达的男性和女性之间的直接相互作用，由男性竞争的适应性反应可能会受到限制。然而，如果雄性对这些特征的表达有重大影响，情况就不一定如此。了解哪种性别最能影响对性竞争的共同特征的表达是很重要的，以便记录每种性别的战略，可塑性反应的范围。然而，这些想法的直接测试需要，在这项研究中，测量的效果操纵的能力，而不是另一个，性别的影响it.We研究了雄性果蝇的性竞争，其中交配持续时间增加后，暴露于竞争对手，导致显着增加的父权份额的一个共享的特质。雄性在交配前可以对竞争对手的存在做出正常的反应，但雌性对雄性的反应通过斩首和固定而减少。我们发现，完整的和斩首，固定的女性交配显着更长的男性已暴露于竞争对手之前交配。因此，男性可以保持他们的反应与完整的和斩首的女性竞争对手，这表明显着的男性影响力的能力，延长交配持续时间在这种情况下。然而，总体而言，与断头雌性相比，完整雌性的交配持续时间显著更长。这是否是由于女性的影响，在一般的交配时间，或男性是否有不同的反应，固定的女性，目前还不知道。获得更全面的了解性别特异性控制的塑料性状将是重要的，在未来了解如何生殖性状的演变和功能。
Many reproductive traits are shared across the sexes. Shared traits can be influenced by both sexes or just one. We identified male-specific control of mating duration in response to sexual competition in fruitflies. Male-specific control is associated with significant male fitness benefits and could arise because of sexual conflict. Males of many species assess the likely level of sperm competition and respond adaptively, for example by increasing the level of courtship they deliver, by transferring more sperm or seminal fluids or by extending matings. In mechanistic terms, it may be easier for males to adjust the level of their investment to the likely level of sperm competition for male-limited traits such as sperm and seminal fluid production over which they have control. However, for shared traits, such as mating duration, that are expressed at a level determined by direct interactions between males and females, adaptive responses by males to competition could be constrained. This need not be the case, however, if males have significant influence over the expression of such traits. Understanding which sex can most influence the expression of shared traits in response to sexual competition is important in order to document the range of strategic, plastic responses that are available to each sex. However, direct tests of these ideas require, as in this study, measurements of the effect on a shared trait of manipulating the ability of one, but not the other, sex to influence it. We studied the responses of male Drosophila melanogaster to sexual competition, in which mating duration is increased following exposure to rivals, resulting in significantly increased paternity share. Males were allowed to respond normally to the presence of rivals prior to mating, but female responses to males were reduced via decapitation and immobilisation. We found that matings with both intact and decapitated, immobilised females were significantly longer with males that had been exposed to rivals prior to mating. Hence males could maintain their responses to rivals with intact and decapitated females, suggesting significant male influence over the ability to extend mating duration in this context. However, overall, mating duration was significantly longer with intact in comparison to decapitated females. Whether this is due to a female influence over mating duration in general, or whether males respond differently to immobilised females, is not yet known. Gaining a fuller understanding of sex-specific control of plastic traits will be important in the future for understanding how reproductive traits evolve and function.
登录
查看更多内容
影响因子：
9.2
作者：
Beaver, LM;Giebultowicz, JM
通讯作者：
Giebultowicz, JM
影响因子：
1
作者：
KREBS, RA
通讯作者：
KREBS, RA
DOI：
10.1098/rspb.2008.1878
发表时间：
2009-05-07
影响因子：
4.7
作者：
Bretman, Amanda;Fricke, Claudia;Chapman, Tracey
通讯作者：
Chapman, Tracey
影响因子：
9.2
作者：
Chiang, Ann-Shyn;Lin, Chih-Yung;Hwang, Jenn-Kang
通讯作者：
Hwang, Jenn-Kang
影响因子：
3.4
作者：
Mazzi D;Kesäniemi J;Hoikkala A;Klappert K
通讯作者：
Klappert K