IFIBYNE   05513
INSTITUTO DE FISIOLOGIA, BIOLOGIA MOLECULAR Y NEUROCIENCIAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
EFFECT OF KETANSERIN IN THE REGULATION OF SATIETY AND THE FEEDING BEHAVIOR OF CARPENTER ANTS.
Autor/es:
ALINA GIACOMETTI; RODRIGO VELARDE; ROXANA JOSENS
Lugar:
Montevideo
Reunión:
Congreso; International Congress of Neuroethology; 2016
Institución organizadora:
International Society for Neuroethology (ISN)
Resumen:
Biogenic amines control and modulate many behaviors across animals. In insects, serotonin is associated with feeding behaviors. Oral administration of serotonin depresses sucrose solution feeding in Camponotus mus ants. Here we investigated in this species 1) whether orally administered ketanserin, a selective antagonist for some serotonin receptors, promotes feeding on sucrose solutions; and 2) if the temporal dynamics of ketanserin action are altered when using dimethyl sulfoxide (DMSO) as a carrier. First, we measured the individual feeding behavior on a 15%(w/w) sucrose solution in foragers that had been previously treated orally either with 0,75µl of a 30% w/w sucrose solution with or without ketanserin (2.10-3 M). In the second experiment, the same groups were compared but ketanserin was dissolved in DMSO before being added to the sucrose solution. The feeding motivation of the colonies was assessed every day prior to the experiments. Ketanserin promoted feeding only when the feeding motivation of the colonies was intermediate. This effect occurred between 3 and 4.5 hours after treatment in the first experiment. DMSO accelerated the onset of this effect. The load ingested by ketanserin treated ants was higher than that of controls in both experiments while intake rates did not vary. The bigger loads in the ketanserin treated ants were mainly due to higher feeding times, suggesting an altered perception of the satiety level. We show that ketanserin produces an effect contrary to that of serotonin in the individual feeding behavior that can be modulated by the motivational status of the colony.