Seasonal variation in elytral colour polymorphism in Harmonia axyridis (the ladybird beetle): the role of non-random mating
Seasonal variation in elytral colour polymorphism in Harmonia axyridis (the ladybird beetle): the role of non-random mating
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异色瓢虫（瓢虫）鞘翅颜色多态性的季节变化：非随机交配的作用
DOI：
10.1038/hdy.1992.129
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发表时间：
1992
期刊：
影响因子：
3.8
通讯作者：
T. Nishida
中科院分区：
文献类型：
--
作者：
N. Osawa;T. Nishida
通过野外观察和室内择偶实验相结合的方法，分析了异色瓢虫鞘翅颜色多态性频率的季节变化。实地观察，涉及每日标记夺回当地人口的总体优势，黑素变形的人口，但非黑素的比例显着增加，从春季到夏季，由于其较高的频率交配之间的不同变形的春季一代。在实验室的实验中，黑色和非黑色的女性优先选择非黑色的男性在春天，但非黑色的交配成功率低于黑色在夏季。因此，黑色素和非黑色素在人群中的相对频率在整个季节中变化，非黑色素在夏季增加，之后减少。实验室实验表明，非随机交配之间的变种是这种变化的基础，与女性，并在较小程度上，男性参与择偶过程。人工变色实验的结果表明，雄性鞘翅的颜色是雌性择偶的一个重要因素，但其他因素，如行为和化学线索也必须参与。
Seasonal variation in the frequency of elytral colour polymorphism in the ladybird beetle, Harmonia axyridis, was analysed through the combination of field observations and laboratory mate-choice experiments. Field observations involving daily mark-recapture of a local population revealed an overall preponderance of melanic morphs in the population, but the proportion of non-melanics notably increased from spring to summer due to their higher frequency of mating among different morphs of the spring generation. In the laboratory experiments, both melanic and non-melanic females preferentially chose non-melanic males in spring, but non-melanics were less successful at mating than melanics in summer. Therefore, the relative frequencies of melanics and non-melanics within a population vary throughout the seasons, with non-melanics increasing in proportion towards summer and decreasing thereafter. Laboratory experiments revealed that non-random mating among morphs is the basis of this variation, with females and, to a lesser degree, males being involved in the process of mate selection. The results of an artificial colour-change experiment indicate that male elytral colour is an important factor in female mate selection but other factors such as behaviour and chemical cues must also be involved.