Abstract

Spermathecal secretion of the female Atractomorpha lata Motschulsky consists of variable prominent protein fractions ranging from 31 to 75 kD in 0 day-old females and from 30 to 140 kD in day 10 to 50 femrnales. The number of prominent fractions in mated fernales at 20, 40, and 50 day-old were more than those of the unmated females of the same age. The protein patterns, appreciable number bands in onceand twice-mated females are similar. The staining intensity and the distribution of fractions were not affected by differences of sex ratio during maintenance and repeated matings. The present study suggests the flushing out of sperm from the spermatheca of female A. lata

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