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Updated: Mar 6, 2026

Measuring and Altering Mating Drive in Male Drosophila melanogaster
Published on: February 15, 2017
Endocrine mechanisms mediating light-temperature effects on male reproductive activity inTyposyllis prolifera
1Institut für Allgemeine Zoologie der Freien Universität Berlin, Königin-Luise-Straße 1-3, D-1000, Berlin 33.
Abstract:
When exposed to a "winter" light-temperature cycle, reproduction in the polychaeteTyposyllis prolifera is inhibited by a hormone from the proventriculus. When exposed to a "summer" cycle, worms show periodic reproduction following an endogenous lunar rhythmictiy. The endocrine system mediating the stimulation of reproduction by summer conditions, was studied by extirpation and transplantation of prostomium and/or proventriculus. A previously unknown prostomial hormone was found to play a major role in this process. Summer conditions induce a temporary endocrine activity in the prostomium. This homone probably does not act directly on peripheral targets, but stimulates reproduction by inactivating the proventricular endocrine system. The experimental evidence of a hierarchic neuroendocrine system governing reproductive activity in syllid polychaetes is discussed.
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