Mate sampling by female barking treefrogs (Hyla gratiosa)
Mate sampling by female barking treefrogs (Hyla gratiosa)
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DOI：
10.1093/beheco/13.4.472
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发表时间：
2002-07-01
影响因子：
2.4
通讯作者：
Gerhardt, HC
中科院分区：
文献类型：
--
作者：
Murphy, CG;Gerhardt, HC
尽管人们对择偶有着浓厚的兴趣，但对个体如何挑选未来伴侣的了解相对较少。事实上，一个关键问题是雌性是否会对雄性进行采样，或者只是与遇到的第一个雄性交配。我们调查了交配采样的女性树皮树蛙（雨蛙gratiosa）。在自然的合唱中选择配偶的雌性不会在雄性之间移动，而是与它们接近的第一个雄性交配。大多数雌性在择偶过程开始时会选择与自己最近的雄性交配，而当与其他雄性的距离较远时，雌性更有可能与最近的雄性交配。这些观察结果与这样的假设是一致的，即雌性不会对潜在的配偶进行采样，而是与第一个雄性交配，它们将其与合唱团的其他成员区分开来。为了测试这个最初的检测假设，我们进行了一个播放实验中，我们提供了女性之间的选择两个电话，其中之一是检测到以上的背景合唱声在女性的释放点，其中之一成为检测只有女性走向最初可检测的呼叫。女性不喜欢最初可检测的电话，从而排除了最初的检测假设，并暗示采样的潜在配偶的女性。基于女性在自然合唱团的行为，我们假设，女性接近合唱团，移动到的位置，他们能够同时检测到几个男性的电话，并从这些男性中选择一个伴侣在一定距离的男性。这种同时取样的现象在求偶和合唱的物种中可能很常见，它们是许多性选择研究的对象。
Despite intense interest in mate choice, relatively little is known about how individuals sample prospective mates. Indeed, a key issue is whether females sample males or simply mate with the first male encountered. We investigated mate sampling by female barking treefrogs (Hyla gratiosa). Females choosing mates in natural choruses did not move between males but instead mated with the first male they approached closely. Most females mated with the male closest to them at the start of their mate-choice process, and females were more likely to mate with the closest male when the distance to other males was large. These observations are consistent with the hypothesis that females do not sample potential mates but instead mate with the first male they distinguish from the rest of the chorus. To test this initial detection hypothesis, we conducted a playback experiment in which we offered females a choice between two calls, one of which was detectable above the background chorus sound at the female's release point, and one of which became detectable only as females moved toward the initially detectable call. Females did not prefer the initially detectable call, thus ruling out the initial detection hypothesis and implicating sampling of potential mates by females. Based on the behavior of females in natural choruses, we hypothesize that females approach the Chorus, move to locations where they are able to detect the calls of several males simultaneously, and choose a mate from among these males at some distance from the males. Such simultaneous sampling may be common in lekking and chorusing species, which have been the subjects of many studies of sexual selection.