Female remating in Drosophila ananassae: shorter duration of copulation during second mating as compared to first mating

Drosophila ananassae, a cosmopolitan and domestic species, belongs to the a nanassae subgroup of the melanogaster species group. Female remating was ob served in ten mass culture stocks of this species, which were initiated fro m flies collected Rom different geographic localities. The frequency of fem ale remating ranges from 24% to 56% in different strains. Strains show sign ificant variation in remating latency (days). Significant variation has als o been found in all the stocks for duration of copulation between first and second matings. The duration of copulation is shelter in second mating as compared to first mating in D. ananassae.