Sử dụng 17α – hydroxy - 20β -dihydroprogesteron (17,20p) và progesteron (p) kích thích sinh sản cá diếc Cyprinus auratus (Linnaeus, 1758) bằng liều tiêm quyết định

Abstract

After administering a priming dose of (10 μg LRH-A₃ and 6mg DOM) to 1 kg female, the resolving doses on Cyprinus auratus (Linnaeus, 1759) were tested with two steroids: 17α,20β-dihydroxyprogesteron (17,20P) and Progesterone (P) to find the optimal dose. Experiment 1 and 2 have determined the optimal doses of 17,20 and P for oocyte maturation and ovulation on the fish were 3 and 15 mg/kg respectively. In Experiment 3, the optimal doses of 17.20P and P were compared with the type and dose of locally used stimulants (40 µg LRH-A₃ + 24 mg DOM/kg fish). Male fish participating in spawning were stimulated by combined injection (16.7 μg LRH-A₃ + 10 mg DOM)/kg fish, injected at the same time as the decisive dose in female fish. The experiments were repeated 3 times. The results of the comparison of the optimal doses showed that 17.20P had the highest yield of fry, followed by P and finally the combination of locally used stimulants (LRH-A₃ + DOM).