Application of new hormone therapy methods for management of marine fish hatcheries in Iran: proposals for mullet, sobaity, grouper and sea bream

Nowadays using different hormone therapy methods are commonly used to manage the fish hatchery worldwide. Due to habituating diverse ecosystems, fish exhibit different reproduction strategies, led to using especial hormones in accordance to their physiological conditions in especial administration methods to gain better performance in induced reproduction. Tropical and sub- tropical fish including most of the species from Persian Gulf and Oman Sea are asynchronous egg producers. In this present paper, we review the reproduction strategy of most commonly marine fish in Iranian aquaculture and proposed some novel and practical hormone therapy methods according to reproductive physiology of given species. The most important criteria to suggest the hormone and administration methods, were as reproductive strategy of given fish, ease availability of hormone in Iran, simple fabrication and administration methods and the efficiency of proposed method in induction of ovulation in fish. Slow- release administration of GnRHa is suggested as the most common and effective method, while in some species traditional methods are still resulted in better spawning responses.