Aim of study: To evaluate the effects increasing NaCl levels on zootechnical performance pacu fingerling. Area The experiments were conducted at Aquatic Organism Production and Reproduction Systems Laboratory belonging to Federal University Paraná (UFPR), in Palotina Sector, Estate, Brazil. Material methods: Seven hundred fifty fingerlings with an average weight 3.41 ± 0.09 g distributed circul...

Perchlike fish are a vast group of advanced teleosts. The species examined to date have three forms of gonadotropin-releasing hormone (GnRH) within a single species, but the origin of the third GnRH peptide is unknown. In this study, the primary structure of three GnRH peptides is determined from the brain of the pacu, Piaractus mesopotamicus, an example of a teleost that is less advanced than ...