Reproductive Biology of Diplodus vulgaris (Geoffroy Saint-Hilaire, 1817) (Pisces Sparidae) in the west coast of Algeria

Abstract

The study of the reproduction of Diplodus vulgaris (Geoffroy Saint-Hilaire, 1817) (Pisces Sparidae) of the Algerian West coast-carried out from September 2015 to August 2016-related to 472 specimens, whose overall length ranged between 14.6 cm and 28.4 cm. The ratio of gonad weight to total weight was assessed monthly, and the evolution of the stages of sexual maturity revealed that, for D. vulgaris, the period of reproduction is between October and February with an oviposition in January. The sex ratio related to the size showed that males are dominant in the classes of small sizes (14-18 cm) and females dominate in the classes of great sizes (19-29 cm).