Caracteres morfométricos e relação peso/comprimento da Carapeba listrada Eugerres brasilianus (Cuvier, 1830)(Actinopterygii: Gerreidae) capturadas na Foz do Rio São Francisco

Abstract

The Gerreidae family species include individuals living in coastal waters and are among the most abundant species in marine and estuarine ecosystems, present in the northeast and southeast regions of Brazil. Information on biological aspects of striped carapeba species Eugerres brasilianus in the region of the mouth of the San Francisco River are incipient to a management plan of this resource, so the present work was used biological data with the objective to describe aspects of the population structure to assist in the composition information associated to patterns of morphological differentiation and growth of the species. The specimens used in this study were captured in around of the mouth, the coordinates 10º27'41.7 ''S and 36º26'13.5''W between May and December 2013, where were collected 95 individuals, 76 females (80%) and 19 males (20%), the majority of these 94.7% were considered adults. Female specimens had greater length and weight than males individuals. The proportion weight / length showed negative allometry for the species, demonstrating an increase in lower weight than in length and is probably associated to the stage of life of individuals and environmental factors which are found, concluding that the studied place is an area of transition, where adults search food, storing energy reserves for the breeding season, which occurs in the ocean environment.