The effect of depth on the reproductive cycle ofBrissopsis lyrifera (Echinoidea,Echinodermata) in the Gulf of Lions,Mediterranean Sea |
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| Authors: | J G Ferrand C Vadon D Doumenc A Guille |
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| Institution: | (1) Laboratoire de Biologie cellulaire, UFR Faculté des Sciences, Université d'Orleáns, B.P. 6759, F-45067 Orléans Cedex 02, France;(2) UA CNRS n° 699, Biologie des Invertébrés Marins, Muséum national d'Histoire Naturelle, 55 rue de Buffon, F-75005 Paris, France |
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| Abstract: | A sample of 227Brissopsis lyrifera were collected in the Gulf of Lions in the Mediterranean Sea between 60 and 1000 m depth over a 21/2-yr period (June 1983 to November 1985). Males and females were sexually mature at the end of summer. After a period of gonadal inactivity during winter, gametogenesis resumed at the beginning of spiring. The cycle was synchronous over the entire bathymetric range studied. Variations in environmental conditions may be one factor inducing gametogenesis. |
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