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本文报道了以人工越冬的长毛对虾Penaeus penicillatus为材料,以切除亲虾单侧眼柄的方法配合适当的生态条件,给予优质的饵料和精心饲养管理,促进亲虾提前成熟产卵,并培育出虾苗。亲虾越冬的存活率为52.91％。手术后亲虾存活率和促熟率分别为65.74％和59.12％。手术后10天即有一尾亲虾促熟产卵,大批成熟产卵是在手术后第25天。产卵后的亲虾经过4—7天的培育又能恢复成熟多次产卵,最多的产4次。从亲虾初次所产的卵径大小、受精率、孵化率及幼体成活率都与海区亲虾相接近,唯有产卵量比海区亲虾少,这是因为人工养殖的越冬亲虾个体小,同时在人工饲养条件下远远不如自然海区的生态条件和营养条件等缘故。越冬期间的水温为13.8—16.5℃,海水比重1.020以上。促进卵巢成熟期间的水温为20.3—27.2℃,海水比重为1.017—1.021。投喂新鲜的贝类、小杂鱼虾,投喂量以第二天略有剩余为度。
In this paper, Penaeus penicillatus, a man-made overwintering Penaeus longus, was used as material to excise broodstock unilaterally with appropriate ecological conditions, to give good feed and meticulous feeding management, A shrimp. Overwintering broodstock survival rate of 52.91%. Survival rate and maturation rate of broodstock were 65.74% and 59.12% respectively. Ten days after surgery, there is a pro-shrimp progenitor spawning, a large number of mature spawning in the first 25 days after surgery. After spawning broodstock after 4-7 days of cultivation can resume maturity spawning, up to 4 times. The size, fertilization rate, hatching rate and larval survival rate of the broodstock from the first generation of broodstock were similar to that of the broodstock in the sea area, but the fecundity was less than that of the broodstock in the sea area because of the small At the same time, under the conditions of artificial rearing far less than the natural ecological conditions and nutritional conditions and other reasons. During the winter, the water temperature is 13.8-16.5 ℃, the proportion of seawater above 1.020. During the ovary maturation, the water temperature is 20.3-27.2 ℃, and the proportion of seawater is 1.017-1.021. Feeding fresh shellfish, small trash shrimp, feeding the amount of the second day a little surplus for the degree.