Conttriibuttiion a ll’’éttude de quellques paramèttres de lla reproducttiion ((RGS,, RHS ett lla sex--rattiio)) chez lla Sardiinelllla auriitta ((Vallenciiennes,, 1847)) pêchée dans lla baiie de Mosttaganem

Abstract

The round sardinella sardinella or (Sardinella aurita Valenciennes, 1847) is one of the most Clupeidae represented in fishery products in Algeria. Our choice focused about allach because of here bio-ecoligical importance, in order to improve the understanding of biological cycles, it seems important to refresh the principal biologic parameters of the species. The aim of this work is to study some parameters of the biology of Sardinella aurita caught in the Bay of Mostaganem, why bimonthly sampling was conducted between Fabruary 2017 and May 2017. A total of 231 fish was collected. The study of sex ratio, showed he was clearly in favour of females. The study of macroscopic stages according to the scale of Fontana, 1969, showed that fish in stage II, are much more numerous in Mars, this is evident because it is the pre-breeding period and to prepare the breeding which only begins in June. the gonado somatic report high for the month of Fabruary, And the Hepato Somatic Report (RHS), the results show that it reaches its maximum in March. On the other hand, the statistics on fisheries between 2006 and 20016 the species collected at the Directorate of Fisheries of the wilaya of Mostaganem showed that the annual catch has decreased significantly compared to the 2007.