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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Abeloos M (1950) Régénération et stolonisation épigame chez l'AnnélideSyllis prolifera Krohn. CR Acad Sci Paris 230:1899–1900
Bohlken S, Joosse J (1982) The effect of photoperiod on female reproductive activity and growth of the freshwater pulmonate snailLymnaea stagnalis kept under laboratory breeding conditions. Int J Invertebr Reprod 4:213–222
Durchon M (1952) Recherches expérimentales sur deux aspects de la reproduction chez les Annélides Polychètes: L'épitoquie et la stolonisation. Ann Sci Nat Zool 14:117–206
Durchon M (1959) Contribution à l'étude de la stolonisation chez les Syllidiens: I. Syllinae. Bull Biol France Belg 93:155–219
Franke HD (1979) Experimentelle Untersuchungen zur Steuerung des Fortpflanzungsrhythmus und der sexuellen Differenzierung an Laborkulturen des PolychaetenTyposyllis prolifera (Krohn 1852). Dissertation, Technische Universität Braunschweig, 91 p
Franke HD (1980) Zur Determination der zeitlichen Verteilung von Fortpflanzungsprozessen in Laborkulturen des PolychaetenTyposyllis prolifera. Helgoländer Meeresunters 34:61–84
Franke HD (1981) Der Einfluß von Temperatur und Tageslänge auf das endokrine System der Fortpflanzungskontrolle bei dem PolychaetenTyposyllis prolifera. Verh Dtsch Zool Ges 1981:190
Geraerts WPM (1976) The role of the lateral lobes in the control of growth and reproduction in the hermaphrodite freshwater snailLymnaea stagnalis. Gen Comp Endocrinol 29:97–108
Golding DW (1972) Studies in the comparative neuroendocrinology of polychaete reproduction. Gen Comp Endocrinol Suppl 3:580–590
Hauenschild C (1975) Die Beteiligung endokriner Mechanismen an der geschlechtlichen Entwicklung und Fortpflanzung von Polychaeten. Verh Dtsch Zool Ges 1974:292–308
Heacox AE, Schroeder PC (1982) The effects of prostomium and proventriculus removal on sex determination and gametogenesis inTyposyllis pulchra (Polychaeta: Syllidae). Wilhelm Roux's Arch 191:84–90
Joosse J (1979) Evolutionary aspects of the endocrine system and of the hormonal control of reproduction of molluscs. In: Barrington EJW (ed) Hormones and evolution, vol 1. Academic Press, London, pp 119–157
Kanatani H (1979) Hormones in echinoderms. In: Barrington EJW (ed) Hormones and evolution, vol 1. Academic Press, London, pp 273–307
Lattaud C (1975) Study of sex control of gametogenesis by organ culture in the oligochaete annelidEisenia foetida f.typica Sav. In: Reinboth R (ed) Intersexuality in the animal kingdom. Springer, Berlin Heidelberg New York, pp 64–71
Lattaud C (1980) Demonstration by organ culture of a cerebral hormone stimulating the secretion of testicular androgen in the oligochaete annelid,Eisenia foetida f.typica Sav. Int J Invertebr Reprod 2:23–36
Lattaud C (1982) Stimulation in vivo de l'androgène testiculaire par l'hormone cérébrale chez l'annélide oligochaete,Eisenia foetida f.typica Sav. Int. J Invertebr Reprod 4:223–237
Olive PJW (1979) Endocrine adaptations in Annelida. In: Barrington EJW (ed) Hormones and evolution, vol 1. Academic Press, London, pp 73–118
Roubos EW, Geraerts WPM, Boerrigter GH, van Kampen GPJ (1980) Control of the activities of the neurosecretory light green and caudo-dorsal cells and of the endocrine dorsal bodies by the lateral lobes in the freshwater snailLymnaea stagnalis (L.). Gen Comp Endocrinol 40:446–454
Wissocq JC (1966) Rôle du proventricule dans le determinisme de la stolonisation chezSyllis amica. CR Acad Sci Paris 262:2605–2608
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Franke, HD. Endocrine mechanisms mediating light-temperature effects on male reproductive activity inTyposyllis prolifera (polychaeta, syllidae). Wilhelm Roux' Archiv 192, 95–102 (1983). https://doi.org/10.1007/BF00848485
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00848485