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46尾雌鲟鱼是在其生殖洄游前期,于圣弗朗西斯科湾,以及正在萨克拉门托河作生殖游动时捕获的。用三种不同激素物质,即鲟鱼和普通鲤粗制垂体提取物、以及(D-ALa~8)GnRH 类似物诱导排卵。三种诱导剂分别以每斤雌鱼体重2.5毫克、4.0毫克和0.1毫克干物质配量注射,结果都有效。据观察,最佳的排卵反应和鱼卵受精,都是在3～4月份用激素处理的。事先捕起的和生殖洄游时捕起的鱼,都同样能获成功。
Twenty-four female sturgeons were captured during the period of their reproductive migration, at San Francisco Bay, and during their reproductive swim in the Sacramento River. Ovulation was induced with three different hormonal substances, crude pituitary extract of sturgeon and common carp, and (D-ALa ~ 8) GnRH analogues. The three inducers were injected at a dose of 2.5 mg / kg body weight and 4.0 mg and 0.1 mg dry weight respectively, and the results were valid. It is observed that the best ovulation response and fertilization of eggs, are treated with hormones in March to April. Fish caught early and reproductively migrated can equally well be successful.