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供实验用施氏鲟 (Acipenserschrenckii)为野生亲本人工繁殖的第 1代人工养殖群体。对 0～ 4龄鲟性腺发育定期活体取样监测观察 ,发现雌鲟在 3龄 ,肉眼可以观察到卵巢中直径为 0 .2～ 0 .3mm的白色卵粒 ,处于卵巢发育的第Ⅱ期。 4龄雌鲟卵径达 0 .5～ 0 .8mm ,卵黄生长期开始 ,卵核位于卵母细胞的中央。推测养殖雌性施氏鲟在5～ 6龄可以达到性成熟产卵。 3龄雄性养殖施氏鲟精巢宽 0 .9～ 1.5cm ,重 9.1～ 15 .6 g ,呈粉白色。 4龄雄鲟已完全达到性成熟 ,精巢宽度达 3.5～ 5 .7cm ,重 2 6 0～ 5 0 4g ,通过注射激素催情 ,可获得大量优质精液。养殖雄性施氏鲟的性成熟年龄比野生的提早 3～ 4年
The 1st Generation Artificial Farming Group for Experimental Artificial Propagation of Acipenserschrenckii for Wild Parents. On the 4th to 4th instar sturgeon, we observed the regular sampling of gonadal development in vivo. We found that the white oocysts in the ovary with diameter of 0.2 ~ 0.3mm can be observed in the 3rd instar of the female sturgeon and in the second stage of ovary development. 4-year-old female sturgeon oval diameter of 0.5 ~ 0.8mm, egg yolk growth began, the egg is located in the center of the oocyte. It is speculated that the cultured female Shihlsia sturgeon can reach the sexual maturity spawning at the age of 5 ~ 6. 3-year-old male culture sturgeon Amur sturgeon width 0. .9 ~ 1.5cm, weight 9.1 ~ 15 .6 g, was pink. 4-year-old male sturgeon has fully reached sexual maturity, testis width of 3.5 ~ 5 .7 cm, weight 2600 ~ 504g, by injection of hormone aphrodisiac, can obtain a large number of high quality semen. Sexual maturity of farrowed male Acipenser sinensis is 3 to 4 years earlier than that of wild ones