Manipulation of prostaglandin-mediated oviposition after mating inTeleogryllus commodus

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Abstract
In T. commodus, mating causes increased egg release by PGE2-action, whereas virgins lay comparatively few eggs. Removal of the spermatheca, the locus of prostaglandin biosynthesis, or severance of the spermathecal duct after mating cancels the egg flood and the egg-laying rate continues at a level similar to that of virgins. Deprivation of the spermathecal content from mated females has the same effect, whereas implantation of crushed spermathecae from mated into the haemocoel of unmated crickets causes a threefold increase in the number of eggs laid. Since PGE2 occurs also in the haemolymph of mated females, it is suggested that spermathecal prostaglandins enter the haemocoel via the genital chamber and the haemolymph transports these lipids to as yet unknown receptor sites in the central nervous system.

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