Biologia reprodutiva da tabarana Salminus hilarii (osteichthyes, characidae) na represa de Três Marias

Abstract

Reproductive biology of Salminus hilarii (osteichthyes, characidae) from a brazilian man-made lake This work was carried out at Três Marias dam, Minas Gerais State, Brazil, with the aim of studying the male and female reproductive biology of the fish Salminus hilariiin a man-made lake. From fishes captured during the period April/1982 to november/1984 the following results were obtained: the body length, body weight and the indices: gonadossomatic, hepatossomatic and abdominal fat; stages of ovarian development (dormant, in maturation, ripe and spawned or exhausted). It was verified that the spawning period S. hilarii occurred at the end and at the beginning of each year of this study and this fish species could be classified as a total spawner. From the observations of the level of the toughness of the anal fin of male fish (sexual secondary characteristic) it was verified that roughness was more evident in fish with ovaries in advanced maturation stage.