Hi. We do use certain hormones to induce spawning of catfish like clarias and pangasius. Catfish pituitary glands are the usual but carp pituitary gland (CPG) or extract (CPE) or Human Chorionic Gonadotropin (HCG) or a combination of them are used.
The gavid female females are injected with the hormone 18 and 12 hours prior to the stripping of eggs. In the case of clarias, the males have to be sacrificed to get the milt from the gonads surgically. Pangasius males, however, can be manually stripped of milt without having to be sacrificed. Please note that the protocol varies from specie to specie.
I hope that this will give you a start on your project. Good luck.