Effects of a sex ratio gradient on female mate-copying and choosiness in Drosophila melanogaster

作     者：Magdalena MONIER Sabine NOBEL Guillaume ISABEL Etienne DANCHIN 

作者机构：UMR-5174 Laboratoire Evolution & Diversite Biologique (EDB) Centre National de la Recherche Scientifique (CNRS) Institut de Recherche pour le Developpement (IRD) Universite de Toulouse 118 route de NarbonneF-31062 Toulouse Cedex 9 France Centre de Recherches sur la Cognition Animale (CRCA) Centre de Biologie Integrative (CBI) Centre National de la Recherche Scientifique (CNRS) Universite de Toulouse 118 route de Narbonne F-31082 Toulouse Cedex 9 France 

出 版 物：《Current Zoology》 (动物学报（英文版）)

年 卷 期：2018年第64卷第2期

页      面：251-258页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 08[工学] 0905[农学-畜牧学] 0906[农学-兽医学] 071002[理学-动物学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 081202[工学-计算机软件与理论] 

基　　金：Toulouse Initiative of Excellence, (ANR-13-BSV7-0007-01, ANR11-IDEX-0002-02) Ministère de l'Education Nationale, de l'Enseignement Superieur et de la Recherche, MESR, (PRESTIGE-2014-1-0005) LabEx ASLAN, (ANR-10-LABX-41) 

主　　题：配偶选择 比率 女性 拷贝 果蝇 坡度 个性 持续时间 

摘      要：In many sexually reproducing species, individuals can gather information about potential mates by observing their mating success. This behavioral pattern, that we call mate-copying, was reported in the fruit fly where females choosing between 2 males of contrasting phenotypes can build a preference for males of the phenotype they previously saw being chosen by a demonstrator female. As sex ratio is known to affect mate choice, our goal was to test whether mate-copying is also affected by encountered sex ratios. Thus, we created a gradient of sex ratio during demonstrations of mate-copying experiments by changing the number of females observing from a central arena 6 simultaneous demonstrations unfolding in 6 peripheral compartments of a hexagonal device. We also tested whether the sex ratio experienced by females during demonstrations affected their choosiness (male courtship duration and double courtship rate) in subsequent mate-choice tests. Experimental male:female sex ratio during demonstrations did not affect mate-copying indices, but positively affected the proportion of both males courting the female during mate-choice tests, as well as male courtship duration, the latter potentially explaining the former relationship. As expected, the sex ratio affected female choosiness positively, and females seem to have evolved a mate-copying ability independently of sex ratio, and a capacity to adapt their choosiness to male availability. This suggests that, as in many animal species, individuals, especially females, can adapt their mate choice depending on the current sex ratio.