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Fig. 1. (A) Mean (±1 S.E.M.) sperm storage in seminal receptacles
and spermathecae at time points ranging from 0.3 h to 2 h after the start of
mating for females mated to Acp36DE1/CyO males (+Acp36DE;
filled circles) and Acp36DE1/Df(2L)H20 males (-Acp36DE;
open circles). Sample sizes are 11 for each mean except where indicated on the
figure. (B) Sperm storage between 6 h and 72 h after the start of mating.
Symbols are the same as above and N=11 for each point. We detected a
smaller difference between the number of sperm stored in the absence of
Acp36DE (relative to the control) than that reported by Neubaum and Wolfner
(1999b). This discrepancy
could be partially attributable to differing experimental procedures between
the two studies but, in addition, modifiers affecting sperm storage may have
acted to mitigate the effect(s) of the Acp36DE1
allele during stock maintenance. Since sperm storage is an important facet of
female fertility, strong selection is expected to act on sperm storage
ability.
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