IBBEA   24401
INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Agonistic behavior changes in a cichlid fish fed with an L-tryptophan supplemented-diet
Autor/es:
RENATO HONJI; MARTÍN RAMALLO; MATÍAS PANDOLFI; GUSTAVO M. SOMOZA; LEONEL MORANDINI; RENATA GUIMARAES MOREIRA
Lugar:
Buenos Aires
Reunión:
Congreso; 2nd Congress of the Federation of Latin-American and Caribbean Societies for Neuroscience (FALAN); 2016
Institución organizadora:
FALAN
Resumen:
Agonistic behavior is a universal feature found in animals, in which aggressive and submissive actions are carried out by individuals immersed in a particular conflict. An agonistic encounter results in the surge of dominant (D) and subordinate (S) animals.Brain serotonin (5-HT) is known to be related to aggression, and as its ynthesisdepends on the essential amino acid L-tryptophan (trp), brain 5-HT levels can beindirectly augmented by incorporating trp in the diet. Here we focused on the effects of a 2 week trp-enriched (TRP) or a control (CTL) diet on the outcome of 1 hour male dyadic agonistic encounters, and the resultant hormonal profiles in specimens of the highly social cichlid fish Cichlasoma dimerus. In this way, three dyadic groups were established: CTL vs. CTL, TRP vs. CTL, and TRP vs. TRP. Independently of the feeding protocol, the biggest males always emerged as D. The latency to the first attack, and the total number of contact aggressive displays did not vary between the three dyads. However, threatening aggressive displays were higher when at least there was one male that had received a TRP diet. Testosterone and 17β-estradiol plasma levels did not differ between feeding conditions or among D and S. On the other hand, 11-ketotestosterone plasma levels) were 4.8 times higher in D than S, independently of the diets. Finally, cortisol levels were always higher in S males. These data indicate aneffect of dietary trp on the outcome of agonistic encounters.