Étude de la synthèse de la vitellogénine chez les mâles intersexués d'Orchestia gammarellus (Pallas) (crustacé amphipode). Effets de la greffe d'un ovaire

Abstract

In intersex males of Orchestia gammarellus (Crustacea, Amphipoda), vitellogenin is sometimes present in the haemolymph, but almost always in small amounts. However, no significant synthesis of vitellogenin can be shown in our experimental conditions. After the grafting of an ovary, vitellogenin becomes abundant, and a high level of synthesis, though subnormal, is observed in nearly half the cases. At the same time, secondary vitellogenesis occurs in the graft. The androgenic gland of the intersex male cannot prevent the ovary from functioning normally.