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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Female-biased sex ratio in a protandrous moth: challenging the mate opportunity hypothesis for explaining protandry.
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Female-biased sex ratio in a protandrous moth: challenging the mate opportunity hypothesis for explaining protandry.

机译：雌蛾的性别偏见性别比例：挑战伴侣机会假说来解释亲蝇。

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Asynchrony among sexes in arrival/emergence timings is common in animals with distinct breeding periods. Scramble competition among males for virgin females is generally attributed to select for protandry among monandrous mating systems, especially in insects. This is classified as the 'mate opportunity hypothesis', or sexual selection for early male emergence. Sex ratio can influence reproductive asynchrony, and protandry is known to be favoured when sex ratio is male-biased. However, in the present communication, empirical evidence demonstrates female-biased pre-adult, adult and operational sex ratios in the monandrous, protandrous moth Opisina arenosella. It appears that males of Opisina need not compete among themselves for virgin mates, and that, males, irrespective of the time of emergence, have sufficient mating opportunities. These throw serious questions at the sexual selection theory for explaining protandry in Opisina. Additionally, data proved that the last arriving females died as virgins, which support models that predict loss of mating opportunities for females due to protandry.
机译：在具有不同繁殖期的动物中，到达/出苗时间的性别之间的异步很普遍。雄性之间争夺原始雌性的竞争通常归因于在单性交配系统中，特别是在昆虫中选择亲皮。这被称为“伴侣机会假说”，即男性早期出现的性别选择。性别比例会影响生殖异步，当性别偏见时，protandry会受到青睐。但是，在本来文中，经验证据表明，女性偏爱的成年蛾，长蛾 Opisina arenosella 的成年前，成年和工作性别比。看来， Opisina 的雄性不需要彼此争夺原始伴侣，而且雄性，无论其出苗时间如何，都有足够的交配机会。这些都对性选择理论提出了严重的问题，以解释奥皮斯纳中的protandry。此外，数据证明最后到来的雌性是处女而死，这支持了预测因protandry造成雌性交配机会丧失的模型。

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