Sexual selection does not drive hindwing tail elaboration in a moon moth, Actias luna
Sexual selection does not drive hindwing tail elaboration in a moon moth, Actias luna
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DOI：
10.1093/beheco/arad019
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发表时间：
2023-04-06
影响因子：
2.4
通讯作者：
Kawahara，Akito Y.
中科院分区：
文献类型：
--
作者：
Rubin，Juliette J.;Kawahara，Akito Y.
最具象征性的动物特征往往归因于性别选择。虽然这种压力是一种重要的力量，但仅由自然选择驱动的精心设计的特征却较少被列举出来。在这里，我们测试了飞蛾的一种精心设计的特征--后翼尾巴--这一特征已经在反捕食者的背景下进行了研究，但由于它在交配中的作用，它仍然没有得到研究。我们给了雌蛾露娜(土豆科)在两种不同后翼尾巴处理的雄蛾之间的选择。在我们的初步实验中，尾巴完整的雄性比去掉尾巴的雄性交配更多。然而，这种差异似乎是由于去掉尾巴造成的损害，正如其他实验所证明的那样。我们创建了一个尾巴/无尾实验装置，我们去掉了两只雄鸟的尾巴，然后将尾巴连接到一只雄鸟身上，只在另一只雄鸟的后翼上涂上了胶水。我们发现这些雄性在交配成功率上没有显著差异。为了确保这一结果不是由于胶水本身，我们给雌性提供了两只完整的雄性，其中一只的翅膀上加了胶水。这一组也有同样的交配成功。因此，我们没有发现尾巴在性选择中发挥作用的证据。这些结果，结合以前对蝙蝠蛾战斗的研究，使用了。露娜表示，非性二形性后翅尾巴很可能是自然选择的结果。我们建议，未来的研究需要测试多种选择力量，以揭示自然选择和性选择作为推动不同动物分类群特征精化的主要力量的盛行程度。
The most emblematic animal traits are often attributed to sexual selection. While this pressure is an important force, elaborated traits that have been driven solely by natural selection are less enumerated. Here, we test an elaborate trait in moths—hindwing tails—that has been studied in an anti-predator context, but that remains unstudied for its role in mating. We gave femaleActias luna(Saturniidae) moths a choice between two males of differing hindwing tail treatments. In our primary experiment, males with intact tails garnered more matings than males with tails removed. This difference appears to result from damage incurred by tail removal, however, as demonstrated with additional experiments. We created a tail/no-tail experimental set where we removed tails from both males, then reglued tails to one and applied glue only to the hindwings of the other. We found no significant difference in mating success between these males. To ensure that this result was not due to the glue itself, we offered females two intact males, with glue added to the wings of one. This set also had equal mating success. We therefore do not find evidence that tails play a role in sexual selection. These results, in combination with previous research on bat-moth battles usingA. luna, indicate that the non-sexually dimorphic hindwing tail was likely driven by natural selection. We suggest that future research testing multiple selective forces is needed to reveal the prevalence of natural versus sexual selection as the primary force driving trait elaboration in diverse animal taxa.