TY - GEN ID - cogprints1948 UR - http://cogprints.org/1948/ A1 - Singh, Shree Ram TI - Female remating in Drosophila ananassae: evidence for sperm displacement and greater productivity after remating Y1 - 2001/03// N2 - ABSTRACT—In Drosophila ananassae, female remating with respect to productivity and sperm displace-ment was studied by employing different mutant strains and a wild type strain. In all the experiments, the continuous confinement technique was used. The comparison of productivity between once-mated (control) and remated females reveals that the productivity of remated females is significantly higher than that of once-mated ones in all the crosses. The P2´ values (the proportion of second male progeny produced after remating) were calculated to test sperm displacement in each cross of remated females. In all the crosses, high P2´ values (0.91–0.94) were found which indicate sperm precedence of second male to mate suggest-ing the existence of sperm displacement in D. ananassae. Furthermore, female productivity is increased after remating in D. ananassae. AV - public KW - female remating KW - sperm precedence KW - sperm displacement KW - sperm competition KW - sexual selection KW - productivity KW - Drosophila ananssae ER -