Effect of carp pituitary extract (CPE) and human chorionic gonadotropin (hCG) on reproductive performance and larval production of the Egyptian Sole Solea aegyptiaca

A 60-day spawning attempt was designed to compare the hormonal stimulation of human chorionic gonadotropin (hCG) with carp pituitary extract (CPE) on reproduction performance and larvae production of Solea aegyptiaca. In two groups, the first (Group I) was injected with 5000IU of hCG, and the second (Group II) was treated with 5 mg/kg brood-stock of CPE. Six circular fiberglass tanks (1.5 m3) were used in this trial. Brood-stock of Solea aegyptiaca were within an average weight of 36.75± 0.85 g and 40.25±2.17 of female and male, respectively. Fish were randomly stocked in tanks at a rate of 10 brood stock (5 male: 5 female)/ tank. Brood-stock was fed with minced shrimp at a feeding level of 1.5% of the biomass. Measurements of water physiochemical were within acceptable limits for reproducing Solea aegyptiaca. Every group was given four batches of fertilized eggs during the experimental period. Statistical analysis of the independent T-test showed that the hCG group was significantly higher in all parameters of reproduction rate than the CPE group.