The importance of pre-and postcopulatory sexual selection promoting adaptation to increasing temperatures

• 作者: Miguel GóMEZ-LLANO Eve SCOTT Erik I.SVENSSON
• 来源期刊: 动物学报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Special Column: Sexual Selection and Environmental Change
• 页码范围: 321-327
• 页数: 7页
• 语种: 英文
• DOI: 10.1093/cz/zoaa059

摘要

Global temperatures are increasing rapidly affecting species globally.Understanding if and how different species can adapt fast enough to keep up with increasing temperatures is of vital import-ance.One mechanism that can accelerate adaptation and promote evolutionary rescue is sexual selection.Two different mechanisms by which sexual selection can facilitate adaptation are pre-and postcopulatory sexual selection.However,the relative effects of these different forms of sexual selection in promoting adaptation are unknown.Here,we present the results from an experimental study in which we exposed fruit flies Drosophila melanogaster to either no mate choice or 1 of 2 different sexual selection regimes(pre-and postcopulatory sexual selection)for 6 generations,under different thermal regimes.Populations showed evidence of thermal adaptation under preco-pulatory sexual selection,but this effect was not detected in the postcopulatory sexual selection and the no choice mating regime.We further demonstrate that sexual dimorphism decreased when flies evolved under increasing temperatures,consistent with recent theory predicting more sexually concordant selection under environmental stress.Our results suggest an important role for precopulatory sexual selection in promoting thermal adaptation and evolutionary rescue.