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Streak Star flounder (Verasper moseri Jordan et Gilbert), subjection the plaice shaped the mesh (Pleuronectitormes), Flounder Division (Pleuronectidae), Star flounder genus (Verasper). Mainly distributed in the Sea of ??Okhotsk, Japan's northwestern coast, east of the Korean Peninsula and Western Nankai District, and China's Yellow Sea and Bohai Sea area. Streak Star flounder delicate meat, delicious, fast growth, both indoor farming in ponds, cage culture. The entire consumer market demand is very optimistic about easily in northern China mariculture industry accepted and may become turbot fish led one of the farmed species. Indoor the streaks Star flounder develop broodstock reproductive regulation of hormone induction, ovum fertilization, hatching, fry rearing and technical process to do a more detailed study, of our fishery restructuring and seawater fish farming sustained and stable development of the industry is of great significance. Streak Star flounder broodstock excellent selection and intensive training nurtured by artificial temperature, light rhythm-control conditions, to obtain a better ovum. Streak Star flounder were purchased from Japan artificial breeding seed in water temperature 10 ° C to 21 ° C, light intensity 500lx 1200lx, pH 7.6 to 8.2, salinity of 25 to 32, dissolved oxygen ≥ 5 mg / L under the conditions of nurturing, feeding artificial feed and homemade bait, age after sexual maturity breeding broodstock. Broodstock operations raising strengthen nurture and water temperature, photoperiod control and other control measures, gonadal development up to stage Ⅳ, Ⅴ stage reached after the hormone injection induced artificial ovum, continuous, regular collection into an egg. The inductive effect after two steroid injection cycle may 5 d to 20 d, 5 d to 24 d, ovum amount of change is similar parabolic shape, reaches a maximum (1800ml / d) and 13 d. Streak Star flounder breeding season the ovum of up to 70 d ~ 80 d, water temperature 6 ℃ ~ 11 ℃ range ovum better, beyond this range is significantly decreased mining eggs effect. Female 175, 2591 × 104 Mei ovum, floating eggs 1852 × 104 pieces, total fertilization rate of 71.48%. Fertilized egg in cultivating temperature of 9 ℃ to 11 ℃, salinity 32 ~~ 33, pH 8.0 to 8.2, dissolved oxygen 6mg / L ~ 8mg / L, light intensity of 500lx ~ 800lx, which lasted 144 h ~ 156 h incubator a brief description of the timing of embryonic development. Test hatching streak Star flounder optimum temperature, salinity range from 10 ℃ to 12 ° C, 33 to 35. The fry rearing conditions: ① newly hatched larvae: water temperature 13 ° C, salinity of 33 to 35, do not change the water, the light intensity of 500lx 800lx; ② 35d Aberdeen fish: water temperature 17 ° C, salinity of 28 to 30, 100% of the daily water exchange rate; light intensity 500lx 800lx; the ③ juvenile, juvenile (60d ~ 100d): water temperature 16 ° C to 17 ° C, salinity of 27 to 32, light strong 800lx 1200lx. The incubation period pH7.8 ~ 8.2, dissolved oxygen ≥ 6mg / L NH4-N ≤ 0.1 mg / L, total. Bait Series: rotifers, Artemia nauplii, Artemia adult, artificial bait. The newly hatched larvae 6.01 × 106 Wei hatching rate of 32.42%, cultivate commodity seed 1.27 × 106 tail (total length from 35mm ~~ 50 mm), 21.14% of the total rate of emergence. Streak Star flounder fry rearing domestic and foreign research progress, combined with experience in seed production trials, summed up a more mature streak Star flounder on artificial breeding technology practices. Purchased from Japan of spots Star flounder artificial breeding of fingerlings (average total length of 83mm, the wet weight of 10 g to 11 g) in water temperature 10 ° C to 21 ° C, the salinity of 25 to 32 under the conditions of cultivation, the use of artificial feed, 3 reach sexual maturity age become a breeding broodstock. Raising operations strengthen the training and control of water temperature, photoperiod, and other measures, streaks Star flounder ovarian development to stage Ⅳ, Ⅴ stage and then by hormone induction of artificial ovum, comparable consecutive regular collection into an egg, ovum period can up to 70 d ~ 80 d. Streak Star flounder females 175, 2591 × 104 Mei ovum, floating eggs 1852 × 104 pieces, total fertilization rate of 71.48%. Dry insemination fertilized eggs, fertilized egg, which lasted from 32 to 33 under the conditions cultivate water temperature of 9 ℃ ~ 11 ℃, salinity 144h ~ 156h completed hatching. Test hatching streak Star flounder optimum temperature, salinity range from 10 ℃ to 12 ° C, 33 to 35. Fry rearing conditions: water temperature from 13 ℃ to 17 ℃, salinity pre-33 to 35, 28 to 30 late early does not change the water began to gradually change the water for 15 days, to 35d to 100% water changes, light intensity 50d the 500lx ~ 800lx, after 800lx ~ 1200lx, the whole process of pH 7.8 ~~ 8.2 dissolved oxygen ≥ 6mg / L, NH4-N ≤ 0.1 mg / L, total. Bait Series: rotifers, Artemia nauplii, Artemia adult, artificial bait. The newly hatched larvae 6.01 × 106 Wei hatching rate of 32.42%, cultivate commodity seed 1.27 × 106 tail (total length from 35mm ~~ 50 mm), 21.14% of the total rate of emergence.
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