ISSN:
1432-041X
Keywords:
Polychaeta
;
Typosyllis
;
Reproduction
;
Endocrine control
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00848485
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