Copulatory courtship and cryptic female choice in red flour beetles Tribolium castaneum
Copulatory courtship and cryptic female choice in red flour beetles Tribolium castaneum
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DOI：
10.1098/rspb.2000.1037
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发表时间：
2000-03-22
影响因子：
4.7
通讯作者：
Arnqvist, G
中科院分区：
文献类型：
--
作者：
Edvardsson, M;Arnqvist, G
许多动物物种的雄性在交配期间和交配后进行求偶行为，似乎仅仅是为了刺激雌性。有人认为，这些行为是由女性的隐性选择进化而来的，因此，女性被认为对男性交配后的父权成功施加了偏见。红粉甲虫Tribolium castaneun在交配过程中用跗骨摩擦雌性鞘翅的外侧边缘。我们通过切除雄性的跗骨来控制雌性对这一行为的感知，从而阻止雄性用其被操纵的腿到达雌性鞘翅的边缘，随后进行了一系列的双交配实验，并对交配行为进行了量化。我们发现，在未被操纵的雄性中，交配求爱行为的强度与相对受精成功率之间存在正相关。然而，这种模式在被操纵的雄性中却不存在，雌性对雄性行为的感知与实际表现不同。因此，雌性对雄性交配求爱行为的感知，而不是雄性行为本身，显然决定了精子在雌性体内竞争受精的命运，这表明交配求爱是在雌性隐性选择的选择下进行的。
Males of many animal species engage in courtship behaviours during and after copulation that appear to be solely aimed at stimulating the female. It has been suggested that these behaviours have evolved by cryptic female choice, whereby females are thought to impose biases on male postmating paternity success. Males of the red flour beetle Tribolium castaneun rub the lateral edges of the females' elytra with their tarsi during copulation We manipulated female perception of this behaviour by tarsal ablation in males, thus preventing males from reaching the edge of the female elytra with their manipulated legs, and by subsequently performing a series of double-mating experiments where the copulatory behaviour was quantified. We found a positive relationship between the intensity of the copulatory courtship behaviour and relative fertilization success among unmanipulated males. This pattern, however, was absent in manipulated males, where female perception of male behaviour differed from that actually performed. Thus, female perception of male copulatory courtship behaviour, rather than male behaviour per se, apparently governs the fate of sperm competing over fertilizations within the female, showing that copulatory courtship is under selection by cryptic female choice.