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The male swallowtail butterfly, Papilio polytes, uses cuticular hydrocarbons for mate discrimination
Animal Behaviour ( IF 2.5 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.anbehav.2020.10.016
Hisashi Ômura , Taro Noguchi , Shinji Ohta

Many species of insects have sex-specific and species-specific cuticular lipid profiles that help regulate mate recognition and courtship behaviour. However, in adult butterflies, little is known about cuticular hydrocarbons (CHCs), the main component of the lipid profile, and their function in mating. Here, we investigated whether Papilio polytes males use cuticular lipids and major CHCs in mate discrimination. When males were presented with freshly killed female and male specimens, copulation attempts were more frequent after contact with the females. Upon removal of the cuticular lipid with solvent washes, the ratios of copulation attempts were similar for both male and female specimens. When male or female cuticular lipid extracts of P. polytes or Papilio protenor (a sympatric and related species) were applied to washed female specimens, males displayed less interest in specimens treated with extracts other than that of the conspecific females. Chemical analysis of the extracts revealed that the CHC profiles, especially the C23–C25 range, differed greatly between the sexes of the two species. Of the identified major hydrocarbons, authentic chemicals 7-tricosene (characteristic of P. polytes males) and 9-pentacosene (characteristic of P. protenor females) greatly reduced the ratio of male copulation attempts with the treated female models. Hence, P. polytes males use the CHC profile of their partner for mate discrimination, and particular alkenes probably play important roles in the prevention of interspecific and same-sex courtships.

中文翻译:

雄性燕尾蝶 Papilio polytes 使用表皮碳氢化合物来区分配偶

许多种类的昆虫具有性别特异性和物种特异性的表皮脂质谱,有助于调节配偶识别和求偶行为。然而,在成年蝴蝶中,对表皮碳氢化合物 (CHC)(脂质谱的主要成分)及其在交配中的功能知之甚少。在这里,我们调查了 Papilio polytes 雄性是否在择偶中使用表皮脂质和主要 CHC。当雄性看到刚被杀死的雌性和雄性标本时,与雌性接触后的交配尝试更加频繁。用溶剂清洗去除表皮脂质后,雄性和雌性标本的交配尝试比率相似。当将 P. polytes 或 Papilio protenor(同域和相关物种)的雄性或雌性表皮脂质提取物应用于清洗过的雌性标本时,与同种雌性相比,雄性对用提取物处理的标本表现出较少的兴趣。提取物的化学分析表明,两个物种的性别之间的 CHC 谱,尤其是 C23-C25 范围差异很大。在确定的主要碳氢化合物中,真实的化学物质 7-二十碳烯(P. polytes 雄性的特征)和 9-戊二烯(P. protenor 雌性的特征)大大降低了雄性与处理过的雌性模型的交配尝试比率。因此,P. polytes 雄性使用其伴侣的 CHC 特征来区分配偶,并且特定的烯烃可能在防止种间和同性求爱中发挥重要作用。提取物的化学分析表明,两个物种的性别之间的 CHC 谱,尤其是 C23-C25 范围差异很大。在确定的主要碳氢化合物中,真实的化学物质 7-二十碳烯(P. polytes 雄性的特征)和 9-戊二烯(P. protenor 雌性的特征)大大降低了雄性与处理过的雌性模型的交配尝试比率。因此,P. polytes 雄性使用其伴侣的 CHC 特征来区分配偶,并且特定的烯烃可能在防止种间和同性求爱中发挥重要作用。提取物的化学分析表明,两个物种的性别之间的 CHC 谱,尤其是 C23-C25 范围差异很大。在确定的主要碳氢化合物中,真实的化学物质 7-二十碳烯(P. polytes 雄性的特征)和 9-戊二烯(P. protenor 雌性的特征)大大降低了雄性与处理过的雌性模型的交配尝试比率。因此,P. polytes 雄性使用其伴侣的 CHC 特征来区分配偶,并且特定的烯烃可能在防止种间和同性求爱中发挥重要作用。protenor 女性)大大降低了男性与接受治疗的女性模型的交配尝试的比例。因此,P. polytes 雄性使用其伴侣的 CHC 特征来区分配偶,并且特定的烯烃可能在防止种间和同性求爱中发挥重要作用。protenor 女性)大大降低了男性与接受治疗的女性模型的交配尝试比例。因此,P. polytes 雄性使用其伴侣的 CHC 特征来区分配偶,并且特定的烯烃可能在防止种间和同性求爱中发挥重要作用。
更新日期:2020-12-01
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