To test the efficacy of the technique of using dopamine antagonists with pituitary extracts, experiments were conducted in July, 2022, at Masab Al Sen (Al Sen estuary) Fish Farm and Hatchery, General Commission for Fisheries Resources, Syria. In all, 18 sets (2 female x 4 male in each set) were tried individually. 9 sets were treated with domperidone (DOM) and carp pituitary extract (CPE) and they constituted the experimental sets, while the rest 9 were treated with CPE and formed the control sets. The ovulation ratio, absolute fecundity, relative fecundity (number of eggs/kg), fertilization rate and hatching rate was 92.85%, 384645 ± 70990 eggs, 56853.22 ± 5385.68 eggs/kg, 80.02% and 61.54%, respectively in the experimental sets whereas it was 92.85%, 355172 ± 53008 eggs, 52059.73 ± 3853.71 eggs/kg, 72.50% and 54.46% respectively in case of control sets. Hatching occurred within 20 h and 45 min to 21 h after fertilization in the experimental sets whereas it was 20 h and 45min to 21 h and 20 min in case of control sets at 26-26.5°C. It was observed that body weight has positive influence on absolute fecundity (r = 0.98, 0.99) and relative fecundity (0.97,0.97) in case of experimental sets and control sets respectively.

In the present research, two marine fish species Chelon auratus and Siganus rivulatus were reared using a diet which contains 32 % protein for 14 months in two ponds in Alssen center of researches in Banias city of Tartous Governorate, was evaluated. The fingerlings (3 g) were collected from sea water then they were transported to two ponds (Dimensions 34 length., 5.6 width, 1.5 height meters). Fifteen thousand fingerlings were recorded in each pond. The weights, the hydrological factors, and behavior of fish were controlled. As a result, the weighs of Chelon fingerlings reached to 190 g and 93 g for Siganus, and the FCR was good (2.13, 3.33 for Chelon and Siganus respectively). Fish was quickly adaptive with the new place according to the activity of fish and accept the artificial feed in short time and ability to tolerant the different temperature and Dissolved oxygen levels, this is was clear to the population of Chelon auratus more than Siganus rivulatus.