Dissertation Research: Post-zygotic Investment in Alytes (Anura, Discoglossidae)

本研究的目的是阐明 两个群体中男性父母的照顾与性别选择的关系 助产士蟾蜍（alytes obstricians）和A. cisternasii，Anura，Discoglossidae）。 部分证据或 性别角色的彻底逆转将通过 性内交配竞争和交配的定量化 选择性 该项目将涉及1）监测自然 被标记的个体。2)的实验室分析 热量含量，以确定相对能量成本 每种性别的生殖。3)实验室和实地观察， 决定了交配中性内竞争的强度， 男女都有。4)室内和田间试验 基于声学通信来确定选择性的呼叫。 这两个物种的比较将构成一个独特的 假设的检验，即相对父母 投资决定了性别角色，从而决定了 会更容易受到性选择的影响 获得的结果 将允许区分男性的影响， 父母对性选择及其结果的投资。

The purpose of this research is to elucidate the relationship of male parental care and sexual selection in two species of midwife toads (alytes obstetricians and A. cisternasii, Anura, Discoglossidae). Evidence for partial or total sex role reversal will be sought through the quantification of intrasexual competition for mates and mate choice selectivity. The project will involve 1) Monitoring of natural populations of marked individuals. 2) Laboratory analysis of caloric content to determine the relative energetic cost of reproduction in each sex. 3) Laboratory and field observations to determine the intensity of intrasexual competition for mates in both sexes. 4) Laboratory and field experiments with synthesized calls to determine selectivity based on acoustical communication. The comparison of the two species will constitute a unique test of the hypothesis which states that relative parental investment determines sex roles and hence determines which sex will be more subject to sexual selection. The results obtained will permit the discrimination between the effect of male parental investment on sexual selection and on its outcome.