Female preference functions based on call duration in the gray tree frog (Hyla versicolor)
Female preference functions based on call duration in the gray tree frog (Hyla versicolor)
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DOI：
10.1093/beheco/11.6.663
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发表时间：
2000-11-01
影响因子：
2.4
通讯作者：
Walton, HC
中科院分区：
文献类型：
--
作者：
Gerhardt, HC;Tanner, SD;Walton, HC
偏好函数，量化偏好强度相对于男性特征或信号的变化，是理解女性选择的机制和后果的核心。雌性树蛙（Hyla versicolor）选择配偶的基础上，广告呼吁和更喜欢长的呼吁短的呼吁。在这里，我们表明，在两个实验设计中，偏好强度显着增加，只有当替代刺激的绝对持续时间低于平均水平时，呼叫持续时间的差异才增加。因此，偏好强度是持续时间的非线性函数，女性的偏好并不仅仅基于持续时间的百分比差异。在模拟昂贵的选择（不等播放水平）的实验中，非线性效应比传统设计（相等播放水平）更明显。重复估计的偏好强度使用不平等的回放设计发现显着的性别女性的变化。这些模式的偏好表明，选择由女性选择的男性生产的平均持续时间超过男性生产的电话很短的电话是强于选择男性生产的平均持续时间超过男性生产的电话很长。女性的喜好，特别是在测试模拟一个潜在的昂贵的选择，可以反映净收益的差异，以女性交配与男性生产的呼吁不同的持续时间。
Preference functions, which quantify preference strength relative to variation in male traits or signals, are central to understanding mechanisms and consequences of female choice. Female tree frogs (Hyla versicolor) choose mates on the basis of advertisement calls and prefer long calls to short calls. Here we show, in two experimental designs, that preference strength increased significantly as the difference in call duration was increased only if the absolute durations of alternative stimuli were below average. Hence preference strength was a non-linear function of duration, and females did not base preferences solely on the percentage difference in duration. In experiments simulating costly choice (unequal playback levels), non-linear effects were more pronounced than in the conventional design (equal playback levels). Repeated estimates of preference strength using the unequal-playback design revealed significant among-female variation. These patterns of preference suggest that selection by female choice for males producing calls of average duration over males producing very short calls is stronger than selection for males producing very long calls over males producing calls of average duration. Female preferences, especially in tests simulating a potentially costly choice, could reflect differences in the net benefits to females of mating with males producing calls of different duration.