Asymmetry in genitalia is in sync with lateralized mating behavior but not with the lateralization of other behaviors  

作　　者：Julian TORRES-DOWDALL Sina J.ROMETSCH Gaston AGUILERA Guillermo GOYENOLA Axel MEYER 

机构地区：[1]Department of Biology,University of Konstanz,Konstanz,Germany [2]Zukunftskolleg,University of Konstanz,Konstanz,Germany [3]Hector Fellow Academy,Karlsruhe,Germany [4]Unidad Ejecutora Lillo(CONICET),Fundacion Miguel Lillo,Tucuman,Argentina [5]Departamento de Ecologia y Gestion Ambiental,Centro Universitario Regional Del Este,Universidad de la Republica,Uruguay

出　　处：《Current Zoology》2020年第1期71-81,共11页动物学报（英文版）

基　　金：This work was supported by the Deutsche Forschungsgemeinschaft,Grant Number TO914/2-1 to J.T-D.

摘　　要：Asymmetries in bilateral organisms attract a lot of curiosity given that they are conspicuous departures from the norm.They allow the investigation of the integration at different levels of biological organization.Here we study whether and how behavioral and asymmetrical anatomical traits coevolved and work together.We ask if asymmetry is determined locally for each trait or at a whole individual level in a species bearing conspicuous asymmetrical genitalia.Asymmetric genitalia evolved in many species;however,in most cases the direction of asymmetry is fixed.Therefore,it has been rarely determined if there is an association between the direction of asymmetry in genitalia and other traits.In onesided livebearer fish of the genus Jenynsia(Cyprinodontiformes,Anablepidae),the anal fin of males is modified into a gonopodium,an intromittent organ that serves to inseminate females.The gonopodium shows a conspicuous asymmetry,with its tip bending either to the left or the right.By surveying 13 natural populations of Jenynsia lineata,we found that both genital morphs are equally common in wild populations.In a series of experiments in a laboratory population,we discovered asymmetry and lateralization for multiple other traits;yet,the degree of integration varied highly among them.Lateralization in exploratory behavior in response to different stimuli was not associated with genital morphology.Interestingly,the direction of genital asymmetry was positively correlated with sidedness of mating preference and the number of neuromasts in the lateral line.This suggests integration of functionally linked asymmetric traits;however,there is no evidence that asymmetry is determined at the whole individual level in our study species.

关 键 词：ANTISYMMETRY BEHAVIORAL LATERALIZATION Jenynsia iineata Jenynsia multidentata PHENOTYPIC integration 

分 类 号：Q492[生物学—生理学]