Wolkers, Carla Patrícia Bejo [UNESP]Serra, MônicaUrbinati, Elisabeth Criscuolo2015-12-072015-12-072015Fish Physiology And Biochemistry, p. 1501-1508, 2015.1573-5168http://hdl.handle.net/11449/131333The neural circuitry for social behavior and aggression appears to be evolutionarily conserved across the vertebrate subphylum and involves a complex neural network that includes the hypothalamus as a key structure. In the present study, we evaluated the changes in monoamine levels in the hypothalamus and on serum cortisol and plasma glucose of resident matrinxã (Brycon amazonicus) submitted to a social challenge (introduction of an intruder in their territory). The fight promoted a significant increase in hypothalamic 5-HT, NA and DA levels and on the metabolites 5-HIAA and DOPAC, and decreased 5-HIAA/5-HT and DOPAC/DA ratios in resident fish. Furthermore, an increase in serum cortisol and plasma glucose was also observed after the fight. Resident fish presented a high aggressiveness even with increased 5-HT levels in the hypothalamus. The alteration in hypothalamic monoaminergic activity of matrinxã suggests that this diencephalic region is involved in aggression and stress modulation in fish; however, it does not exclude the participation of other brain areas not tested here.1501-1508engAggressionCortisolDopamineHypothalamusNoradrenalineSerotoninIntArtigo10.1007/s10695-015-0102-5Acesso restrito89991497257336262055270000-0001-6623-8095