The role of chemical communication in sexual selection: hair-pencil displays in the diamondback moth, Plutella xylostella
The role of chemical communication in sexual selection: hair-pencil displays in the diamondback moth, Plutella xylostella
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化学通讯在性选择中的作用：小菜蛾中的毛笔展示
DOI：
10.1016/j.anbehav.2009.11.015
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发表时间：
2010
期刊：
影响因子：
2.5
通讯作者：
M. Elgar
中科院分区：
文献类型：
--
作者：
L. Davie;T. Jones;M. Elgar
理论认为，如果第二性征（或信号）是昂贵的，雌性在交配对象之间进行选择，雄性在竞争中应该表现得更积极。我们研究了小菜蛾（Plutella xylostella）求偶时化学信号的使用。雄性小菜蛾的腹部尖端有一个毛笔状腺体，可以在求偶期间释放化学信号。雄性用化学信号来探测潜在的竞争者，但是雄性在性信号上的投入并没有随着竞争者数量的增加而线性增加。父辈群体中的雄性展示和交配行为模式不一定会在下一代中复制。与没有或两个竞争者的竞争对手相比，暴露于一个雄性竞争者的父辈更有可能展示他们的毛笔，但下一代雄性的展示行为（虽然总体上更高）在这些处理中没有显着变化。此外，获得交配的亲代雄虫比没有获得交配的雄虫展示毛笔的频率更高；同样，这种模式在下一代雄性中并不明显。最后，与上一代男性相比，儿子们更有可能展示他们的发笔，并且更有可能成功交配。这些代际模式表明，实现交配的倾向可能有遗传成分。
Theory suggests that if secondary sexual characteristics (or signals) are costly and females choose between mating partners, males should display more vigorously in the presence of competition. We investigated the use of chemical signals during courtship in the diamondback moth, Plutella xylostella. Males of P. xylostella have a hair-pencil gland on the tip of their abdomen, which allows for the release of chemical signals during courtship. Males detected potential competitors using chemical signals, but male investment in sexual signalling did not increase linearly in the presence of increasing numbers of competitors. The patterns of male display and mating behaviour among the parental population were not necessarily replicated among the next generation of males. Males of the parental generation that were exposed to one male competitor were more likely to display their hair-pencil than males exposed to zero or two competitors, but the display behaviour of the next generation of males (while higher overall) did not vary significantly across these treatments. Furthermore, males of the parental generation that acquired matings displayed their hair-pencil at a higher rate than males that did not obtain matings; again this pattern was not evident among the next generation of males. Finally, sons tended to be more likely to display their hair-pencil, and were significantly more likely to achieve a successful mating, than the previous generation of males. These intergenerational patterns suggest that the tendency to achieve copulations may have a genetic component.