Responsiveness of pituitary to galanin throughout the reproductive cycle of male European sea bass (Dicentrarchus labrax).

•Galanin regulates the reproductive cycle male in sea bass.•Galanin receptors are differentially expressed in the hypothalamus and pituitary.•Differential expression of galrs depends on testicular development stages.•Galanin stimulates pituitary gonadotropins release in vitro.•Gonadotropins release induced by galanin varies across the reproductive cycle.