Female remating in Drosophila ananassae: evidence for sperm displacement and greater productivity after remating

Singh, Shree Ram (2001) Female remating in Drosophila ananassae: evidence for sperm displacement and greater productivity after remating. [Preprint]

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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.

Item Type:Preprint
Keywords:female remating, sperm precedence, sperm displacement, sperm competition, sexual selection, productivity, Drosophila ananssae
Subjects:Biology > Evolution
ID Code:1948
Deposited By: Singh, Shree Ram
Deposited On:01 Dec 2001
Last Modified:11 Mar 2011 08:54

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