Relatedness dynamics and sex-biased dispersal in a seasonal cycle of corn mice from intensively managed agroecosystems  

作　　者：Lucia V.Sommaro Juan J.Martinez Marina B.Chiappero Andrea R.Steinmann Cristina N.Gardenal JoséW.Priotto 

机构地区：[1]Laboratorio de Ecologia Evolutiva y Biogeografia,Instituto de Ecorregiones Andinas(INECoA),Universidad Nacional de Jujuy-Consejo Nacional de Investigaciones Cientificas y Tecnicas(CONICET),San Salvador de Jujuy,Jujuy,Argentina [2]Instituto de Diversidad y Ecologia Animal(IDEA),Consejo Nacional de Investigaciones Cientificas y Técnicas(CONICET)and Universidad Nacionalde Cordoba,Cordoba,Argentina [3]Catedra de Genética de Poblaciones y Evolucion,Facultad de Ciencias Exactas,Fisicas y Naturales,Universidad Nacional de Cordoba,Cordoba,Argentina [4]Grupo de Investigaciones en Ecologia Poblacional y Comportamental(GIEPCO),Instituto de Ciencias de la Tierra,Biodiversidad y Ambiente(ICBiA),Universidad Nacional de Rio Cuarto-Consejo Nacional de Investigaciones Cientificas y Técnicas(CONICET),Rio Cuarto,Cordoba,Argentina

出　　处：《Current Zoology》2024年第1期1-12,共12页动物学报（英文版）

基　　金：support of by grants of the CONICET(Consejo Nacional de Investigacion Cientifica y Tecnologica),FONCyT(Fondo para la Investigacion Cientifica y Tecnologica)and from the Universidad Nacional de Cordoba(UNC)and Universidad Nacional de Rio Cuarto(UNRC).

摘　　要：The sex-biased dispersal and kinship dynamics are important factors shaping the spatial distribution of individuals and are key parameters affecting a variety of ecological and evolutionary processes.Here,we studied the spatial distribution of related individuals within a population of corn mice Calomys musculinus in a seasonal cycle to infer dispersal patterns.The sampling was carried out from spring 2005 to winter 2006 in field borders of intensively managed agroecosystems.Genotyping data from 346 individuals with 9 microsatellites showed spatial genetic structure was weak for males,but not for females.The results indicate a complex spatial kinship dynamic of related females across all seasons.Which,contrary to our expectations,dispersal distances decrease with the increase of the population abundance.Meanwhile,male dispersal distances were greater when population abundance increased and thus the availability of active females.Males disperse greater distances to mate and sire offspring with distant females as a possible inbreeding avoidance mechanism.This study shows that C.musculinus is capable of much greater scattering distances than previously reported and that dispersal occurs fluidly and without barriers across the agroecosystem.The indirect benefit of dispersal on individual fitness could be related to relaxing the competition in the natal area and increasing the mating rate.Our study highlights the value of combining genetic relatedness,fieldwork observations,and behavioral data to estimate dispersal at a fine geographical scale.

关 键 词：dispersal distances kinship dynamics MICROSATELLITE small mammals spatial autocorrelation 

分 类 号：Q95[生物学—动物学]