Abstract
Unique in vertebrates, the brain of highly evolved teleosts, such as perciforms, expresses three GnRH (gonadotropin-releasing hormone) variants, salmon GnRH (sGnRH), seabream GnRH (sbGnRH) and chicken GnRH-II (cGnRH-II) derived from three different genes. In sea bass, the full-length cDNA encoding these three GnRH peptides have been recently cloned. We report here the central distribution of the cells expressing these different peptides as studied by in situ hybridization techniques.