Male mate choice based on ontogenetic colour changes of females in the damselfly Ischnura senegalensis
Male mate choice based on ontogenetic colour changes of females in the damselfly Ischnura senegalensis
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DOI：
10.1007/s10164-010-0257-6
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发表时间：
2011-05-01
影响因子：
0.9
通讯作者：
Watanabe, Mamoru
中科院分区：
文献类型：
--
作者：
Takahashi, Yuma;Watanabe, Mamoru
虽然男性择偶行为已在许多类群中报道，但对其可塑性和进化后果知之甚少。在豆娘Ischnura塞内加尔，女性表现出颜色二型性（雌雄同体和andromorph）。雌雄异形体的体色随性成熟而发生个体发育上的变化，而雌雄异形体的体色变化不大。为了检验雄性在性不成熟和成熟雌性之间的择偶行为，进行了二元选择实验。处女男性单独饲养的女性出现后没有表现出显着的偏好性不成熟和成熟的女性这两种变体，表明处女男性无法区分女性的生殖状态。另一方面，男性有经验的交配与gynomorphs喜欢性成熟的gynomorphs的性不成熟的。然而，男性经历过交配andromorphs不能区分性不成熟和成熟andromorphs，可能是由于没有显着的个体发育变化，他们的胸部颜色。因此，雌性体色是雄性区分性成熟阶段的重要线索。依赖于交配经验的习得性择偶能力可能有助于雄性有效地发现潜在的配偶，避免性不接受的未成熟雌性。最后，我们讨论了个体发育的颜色变化在女性的适应意义。
While male mate choice behaviour has been reported in many taxa, little is known about its plasticity and evolutionary consequences. In the damselfly Ischnura senegalensis, females exhibit colour dimorphism (gynomorph and andromorph). The body colour of gynomorphs changed ontogenetically in accordance with sexual maturation, while little change occurred in andromorphs. To test the male mate choice between sexually immature and mature females of both morphs, binary choice experiments were conducted. Virgin males that were reared separately from females after emergence did not show significant preference between sexually immature and mature females for both morphs, indicating that virgin males were unable to discriminate female reproductive status. On the other hand, males that had experienced copulation with gynomorphs preferred sexually mature gynomorphs to sexually immature ones. However, males that had experienced copulation with andromorphs could not discriminate between sexually immature and mature andromorphs, probably due to the absence of significant ontogenetic change in their thoracic colour. Therefore, female body colour is an important cue for males in discriminating between sexual maturation stages. Learned mate discrimination depending on copulation experience might help males to detect potential mates effectively and avoid sexually unreceptive immature female. We finally discuss the adaptive significance of the ontogenetic colour change in females.