Predator-induced changes of male and female mating preferences: innate and learned components  

作　　者：Martin PLATH Kai LIU Diane UMUTONI Guilherme GOMES-SILVA Jie-Fei WEI Eric CYUBAHIRO Bo-Jian CHEN Carolin SOMMER-TREMBO 

机构地区：[1]Department of Basic and Applied Zoology, College of Animal Science and Technology, Northwest A&F University, Yangling, China [2]Shaanxi Key Laboratory for Molecular Biology in Agriculture, Northwest A&F University, Yangling, China [3]Sino-Canadian Center for Environment & Sustainable Development, Department of Geography ("Saude Ambiental"), Universidade Federal de Uberlandia, Minas Gerais, Brazil [4]College of Environmental Science and Engineering,Tongji University, Shanghai, China [5]Department of Environmental Sciences, Institute of Zoology, University of Basel, Switzerland

出　　处：《Current Zoology》2019年第3期305-316,共12页动物学报（英文版）

基　　金：Talent Support Funding (Z111021403 and Z111021501;to M.P.);National Natural Science Foundation of China (Grant No. 31800322;to B-J.C.).

摘　　要：While many mati ng pref ere nces have a genetic basis, the question remai ns as to whether and how learning/experience can modify individual mate choice decisions. We used wild-caught (predator-experienced) and Fi laboratory-reared (predator-naive) invasive Western mosquitofish Gambusia affinis from China to test whether mating preferences (assessed in a first mate choice test) would change under immediate predation threat. The same individuals were tested in a second mate choice test during which 1 of 3 types of animated predators was presented: 1) a co-occurring predator, 2) a co-evolved but not currently co-occurring predator, and 3) a non-piscivorous species as control. We compared preference scores derived from both mate choice tests to separate innate from experiential effects of predation. We also asked whether predator-induced changes in mating preferences would differ betwee n sexes or depend on the choosing individual's personality type and/or body size. Wild-caught fish altered their mate choice decisions most when exposed to the co-occurring predator whereas laboratory-reared individuals responded most to the co-evolved predator, suggesting that both innate mechanisms and learning effects are involved. This behavior likely reduces individuals' risk of falling victim to predation by temporarily moving away from high-quality (i.e., conspicuous) mating partners. Accordingly, effects were stronger in bolder than shyer, large- compared with small-bodied, and female compared with male focal individuals, likely because those phenotypes face an increased predation risk overall. Our study adds to the growing body of literature appreciating the complexity of the mate choice process, where an array of intrinsic and extrinsic factors interacts during decision-making.

关 键 词：FEMALE CHOICE MALE MATE CHOICE non-independent MATE CHOICE PREDATOR recognition sexual selection 

分 类 号：Q[生物学]