Female control of sperm ejection and retention in the cornsilk fly Euxesta eluta(Diptera:Ulididae)  

作　　者：Solana Abraham Andrea Moyano Viviana Diaz MGabriela Murua Juan Rull 

机构地区：[1]Laboratorio de Investigaciones Ecoetologicas de Moscas de la Fruta y sus Enemigos Naturales(LIEMEN),PROIMI-Biotecnologia,CONICET,Tucuman,Argentina [2]Instituto de Tecnologia Agroindustrial del Noroeste Argentino(ITANOA),Estacion Experimental Agroindustrial Obispo Colombres(EEAOC)—CONICET,Tucuman,Argentina

出　　处：《Insect Science》2023年第4期1183-1190,共8页昆虫科学（英文版）

基　　金：supported by the Fund for Scientific and Technological Research(FONCyT PICT 2018-03521).

摘　　要：Promiscuous mating systems provide the opportunity for females to bias fertilization toward particular males.However,distinguishing between male sperm com-petition and active female sperm choice is difficult for species with internal fertilization.Nevertheless,species that store and use sperm of different males in different storing struc-tures and species where females are able to expel all or part of the ejaculates after cop-ulation may be able to bias fertilization.We report a series of experiments aimed at pro-viding evidence of female sperm choice in Euxesta eluta(Hendel),a species of ulidiid fly that expels and consumes ejaculates after copulation.We found no evidence of greater reproductive success for females mated singly,multiply with the same male,or mated multiply with different males.Female E.eluta possesses two spherical spermathecae and a bursa copulatrix for sperm storage,with a ventral receptacle.There was no significant difference in storing more sperm in spermathecae 24 h after copulation than immediately after copulation.Females mated with protein-fed males had greater reproductive success than similar females mated to protein-deprived males.Protein-fed females prevented to consume the ejaculate,retained more sperm when mated to protein-fed males than when mated to protein-deprived males.Our results suggest that female E.eluta can exert control of sperm retention of higher quality males through ejaculate ejection.

关 键 词：bursa copulatrix cornsilk fly cryptic female choice ejaculate consumption sperm choice SPERMATHECAE 

分 类 号：Q96[生物学—昆虫学]