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La reproduction des poissons plats (Téléostéens, Pleuronectiformes) en Baie de Douarnenez. 1. Cycles sexuels et fécondité des arnoglosses Arnoglossus thori , A. laterna, A. imperialis (Bothidae) = Reproduction of flatfishes in Douarnenez Bay: Sexual cycles and fecundity of Arnoglossus thori , A. laterna , A. imperialis
Déniel, Ch. (1983). La reproduction des poissons plats (Téléostéens, Pleuronectiformes) en Baie de Douarnenez. 1. Cycles sexuels et fécondité des arnoglosses Arnoglossus thori , A. laterna, A. imperialis (Bothidae) = Reproduction of flatfishes in Douarnenez Bay: Sexual cycles and fecundity of Arnoglossus thori , A. laterna , A. imperialis. Cah. Biol. Mar. 24(2): 231-252
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094
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  • Déniel, Ch.
Abstract
    A histological study of ovaries and the survey of 3 indexes (RGS, RHS, K) were done to establish the spawning season of Arnoglossus species in Douarnenez Bay: A. thori spawns in April-June, A. laterna in May-September, and A. imperialis in spring. In the three species, vitellogenesis takes place in only one batch of oocytes and the end of maturation is characterized by the formation of a continuous and hyaline mass of yolk. A. laterna sprawns nearly the whole of the ripe eggs; it is not the case for A. thori which, after spawning, keeps in the ovaries hyaline and vitellogenetic oocytes that degenerate and are resorbed. The mean relative fecundity of A. thori reach 3900, that of A. laterna 2600.
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