Artículo
Dietary l-tryptophan modulates agonistic behavior and brain serotonin in male dyadic contests of a cichlid fish
Morandini, Leonel
; Ramallo, Martín Roberto
; Scaia, María Florencia
; Höcht, Christian; Somoza, Gustavo Manuel
; Pandolfi, Matias
Fecha de publicación:
12/2019
Editorial:
Springer
Revista:
Journal Of Comparative Physiology A-sensory Neural And Behavioral Physiology
ISSN:
0340-7594
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Although some studies have investigated the effects of dietary l-tryptophan on agonistic behavior, research on adult fish specimens is still lacking. Moreover, submissive behaviors have been generally overlooked. We focused on agonistic behavior between males of the cichlid fish Cichlasoma dimerus, in dyadic encounters held in a novel context after being fed or not with an l-tryptophan enriched diet (TRP) for 2 weeks. We arranged three different dyads: control/control (control conditions: not TRP enriched), control/TRP, and TRP/TRP. We also registered the response of the brain serotonergic system in four brain regions. TRP/TRP dyads showed higher latencies to first attack, lower overall aggression, and lower proportions of bites and passive copings (submissive display) compared to control/control. TRP dominant males performed fewer bites with respect to controls, and subordinate males opposed to TRP males showed fewer passive copings. Higher serotonergic activities were found in subordinates’ optic tectum and in the telencephalon and preoptic area/hypothalamus of TRP males. Altogether, results point out that dietary l-tryptophan reduced males’ motivation to attack and dominant aggression, which consequently influenced subordinate agonistic repertory. In addition, males within TRP/TRP dyads showed a switch in their behavioral agonistic repertory. These behavioral outcomes were probably due to modifications at brain serotonergic functioning.
Palabras clave:
AGONISTIC BEHAVIOR
,
BRAIN
,
CICHLIDS
,
L-TRYPTOPHAN
,
SEROTONIN
Archivos asociados
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Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(IIB-INTECH)
Articulos de INST.DE INVEST.BIOTECNOLOGICAS - INSTITUTO TECNOLOGICO CHASCOMUS
Articulos de INST.DE INVEST.BIOTECNOLOGICAS - INSTITUTO TECNOLOGICO CHASCOMUS
Citación
Morandini, Leonel; Ramallo, Martín Roberto; Scaia, María Florencia; Höcht, Christian; Somoza, Gustavo Manuel; et al.; Dietary l-tryptophan modulates agonistic behavior and brain serotonin in male dyadic contests of a cichlid fish; Springer; Journal Of Comparative Physiology A-sensory Neural And Behavioral Physiology; 205; 6; 12-2019; 867-880
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