Abstract
Trial for culture broodstock of Black seeahorses (Hippocampus kuda Bleeker, 1852) the 1st generation (F1) in Khanh hoa province since September, 2018 to May, 2019 located in the experiment stations of Coastal Branch, Vietnam - Russian Tropical Center. The trial culture Black seahorse (F1) from seed to grow-outt fish by 2 method: cement tank and floating cage in sea. Result: The growth of fish is same in 2 method (P>0.05), but the survival rate in cement tank (83.0%) is higher than in floating cage (76.7%). The 2nd trial: culture Black seahorse (F1) from grow out to mature fish, result: The size of fish start trial W: 2083±189.5 mg, L: 104.7±3.61 mm, after 2 months culture, harvest fish with size W: 3680±104.6 mg, L: 120.2±1.51 mm. The 3rd trial: culture Black seahorse (F1) from mature fish to brood stock. Sex ratio male:female =1:1,1 (P>0.05). The survival rate of brood stock 81.1±1.36%; The rate male have embryo in pouch 70.6±11.82%; Spawning rate 71.1±10.08%; Spawning capacity of male 262±85 fry. Survival rate of fry 2 day after spawn 79.5±11.8%.
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