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对达氏鳇、史氏鲟人工繁殖时通过水流刺激 ,在水温 8～ 1 3℃下 ,以DOS (自行研制 )进行 2～ 3次的注射催熟 ,再注射自制的类固醇激素 1 7α-羟基 - 2 0 β双羟基孕酮(以下简称 1 7α- 2 0 βp) ;在水温 1 6～ 1 8℃利用促黄体素释放激素类似物 (LHRH -A) ,诱导达氏鳇、史氏鲟排卵 ,排精。效应时间 8～ 1 8h,获得催产率 1 0 0 %、受精率和杂交受精率 90 %的效果。采用全人工饲料开口试验和苗种培育试验 ,并获得 86 7%开口成活率和 73 4%的苗种成活率。从而达到提高开口率和成活率的目的。观察鲟鳇鱼摄食、生长与形态发育状况。生长曲线表明 :不论是体长还是体重 ,50日龄前增长缓慢 ,50～ 1 0 0日龄则速度增长较快。经 1 0 0d饲养 ,平均体长达 2 8 3cm ,平均体重达 69 7g。
When the artificial reproduction of Daphniphylla schrenckii and Amur sturgeon, the water was used to stimulate and simulate the injection of homemade steroid hormone 1 7α-hydroxy at the temperature of 8 to 13 ℃ by DOS (self-developed) for 2 to 3 times. - 2 0 β-dihydroxy progesterone (hereinafter referred to as 1 7α-2 0 βp); at a water temperature of 16 ~ 18 ℃ using luteinizing hormone-releasing hormone analogue (LHRH-A) , Ejaculation. Effect time 8 ~ 1 8h, get the oxytocin rate of 100%, fertilization rate and the effect of 90% hybridization rate. Full artificial feed opening test and seedling growth test were conducted, and the survival rate of 86 7% and the survival rate of 73 4% were obtained. So as to achieve the purpose of improving the aperture ratio and the survival rate. Observation of sturgeon fish feeding, growth and morphological development. The growth curve showed that the body length and body weight increased slowly before 50 days of age and rapidly at 50 to 100 days of age. After being fed for 100 days, the average body length was 2 8 3 cm with an average body weight of 69 7 g.