Female choice in the red mason bee, Osmia rufa (L.) (Megachilidae)
Female choice in the red mason bee, Osmia rufa (L.) (Megachilidae)
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DOI：
10.1242/jeb.038174
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发表时间：
2010-12-01
影响因子：
2.8
通讯作者：
Ayasse, Manfred
中科院分区：
文献类型：
--
作者：
Conrad, Taina;Paxton, Robert J.;Ayasse, Manfred
女性通常被认为在选择配偶时使用几种线索和不止一种方式，可能是因为它们提供了关于配偶适合性的补充信息。在红石匠蜂（Osmia rufa）中，我们调查了雌性选择交配伴侣的标准。我们假设雌性使用雄性胸部振动和大小作为雄性生存能力和雄性气味的标志来进行亲缘辨别和遗传相关性评估。因此，我们比较了被雌性接受交配的雄性和被拒绝交配的雄性，包括它们的大小，它们的即时交配前振动（使用激光振动测量法），未交配和交配对的遗传相关性（使用微卫星标记）和释放的挥发物（使用化学分析）。雌性表现出对中等大小的雄性的偏好，这些雄性的体型略大于雄性的体型。此外，接受交配的雄虫比拒绝交配的雄虫的交配前振动爆发时间明显更长。振动可能表明活力，并确保雌性选择的雄性代谢活跃和健康。雌性更倾向于与基因更接近的雄性交配，可能是为了避免近亲繁殖的萧条。尽管雄性气味和雌性偏好之间的关系很复杂，但在被接受和被拒绝的雄性之间，角质层表面的挥发物在某些碳氢化合物的相对数量上存在显著差异。因此，雌性也可能利用气味的差异来选择雄性。我们的调查表明，在选择雄性时，绿腹草雌性似乎使用了多种线索。未来的研究需要证明气味是否在亲属识别中起作用，以及雌性如何将多种线索整合到配偶选择中。
Females are often thought to use several cues and more than one modality in selection of a mate, possibly because they offer complementary information on a mate's suitability. In the red mason bee, Osmia rufa, we investigated the criteria a female uses to choose a mating partner. We hypothesized that the female uses male thorax vibrations and size as signs of male viability and male odor for kin discrimination and assessment of genetic relatedness. We therefore compared males that had been accepted by a female for copulation with those rejected, in terms of their size, their immediate precopulatory vibrations (using laser vibrometry), the genetic relatedness of unmated and mated pairs (using microsatellite markers) and emitted volatiles (using chemical analyses). Females showed a preference for intermediate-sized males that were slightly larger than the modal male size. Furthermore, male precopulatory vibration burst duration was significantly longer in males accepted for copulation compared with rejected males. Vibrations may indicate vigor and assure that males selected by females are metabolically active and healthy. Females preferentially copulated with males that were genetically more closely related, possibly to avoid outbreeding depression. Volatiles of the cuticular surface differed significantly between accepted and rejected males in the relative amounts of certain hydrocarbons, although the relationship between male odor and female preference was complex. Females may therefore also use differences in odor bouquet to select among males. Our investigations show that O. rufa females appear to use multiple cues in selecting a male. Future investigations are needed to demonstrate whether odor plays a role in kin recognition and how the multiple cues are integrated in mate choice by females.