Natural variation in social conditions affects male mate choosiness in the amphipod Gammarus roeselii
作者机构：Department of Wildlife/Zoo-Animal-Biology and SystematicsInstitute for EcologyEvolution and Diversity Goethe University FrankfurtMaxvon-Laue-Straße 13Frankfurt am MainD-60438Germany Department of Environmental ScienceStockholm UniversitySvante Arrheniusväg 8StockholmSE-11418Sweden Zoological InstituteUniversity of BaselVesalgasse 1BaselCH-4051Switzerland Department of Aquatic EcotoxicologyInstitute for EcologyEvolution and DiversityGoethe University Frankfurt am MainFrankfurt am MainGermany
出 版 物：《Current Zoology》 (动物学报（英文版）)
年 卷 期：2022年第68卷第4期
页 面：459-467页
核心收录：
学科分类：0710[理学-生物学] 07[理学] 071002[理学-动物学]
主 题：amplexus Crustacea local adaptation mate choice population density sex ratio
摘 要：The extent of male mate choosiness is driven by a trade-off between various environmental factors associated with the costs of mate acquisition,quality assessment and opportunity *** knowledge about natural variation in male mate choosiness across different populations of the same species,however,remains *** this study,we compared male mate choosiness across 10 natural populations of the freshwater amphipod Gammarus roeselii(Gervais 1835),a species with overall high male mating investments,and evaluated the relative influence of population density and sex ratio(both affecting mate availability)on male mate *** investigated amplexus establishment after separating mating pairs and presenting focal males with a novel,size-matched female from the same *** analysis revealed considerable effects of sex ratio and(to a lesser extent)population density on time until amplexus establishment(choosiness).Male amphipods are able to perceive variable social conditions(e.g.,sex ratio)and modify their mating strategy accordingly:We found choosiness to be reduced in increasingly male-biased populations,whereas selectivity increases when sex ratio becomes female *** this,our study expands our limited knowledge on natural variations in male mate choosiness and illustrates the importance of sex ratio(i.e.,level of competition)for male mating decisions in natural *** for variation in sex ratios,therefore,allows envisioning a distinctive variation of choosiness in natural populations and highlights the importance of considering social background information in future behavioral studies.
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