黄颡鱼人工繁殖关键技术研究

Critical techniques for artificial propagation of \%Pelteobagrus fulvidraco \%(Richardson)

1998～ 1 999年对黄颡亲鱼来源选择、雌雄鉴别、催产水温、催情技术、催产接卵技术、孵化技术等进行了比较研究。共催产雌 534尾 ,雄 533尾 ,获卵 1 0 4 63万粒。下塘黄颡苗 2 1 95万尾 (1 0～ 2 9mm) ,平均获产率 61 8% (83 3%～ 1 3 3% ) ,受精率64 4% (85%～ 30 % ) ,孵化率 57 2 3% (80 %～ 2 5% ) ,下塘率 2 1 % (60 %～ 4 4% )。适宜黄颡鱼催情孵化的水温为 2 2～ 2 8℃ ,最适水温为 2 3～ 2 6℃。

Critical techniques for selection and sexual determination of broodfish, spawning, egg collecting,and incubation of \%Pelteobagrus fulvidraco\% (Richardson) were studied from 1998 to 1999. 534 females and 533 males were induced to spawn by hormone injection, 104 63×10\+4 eggs and 21 95×10\+4 fry (10-29 mm) being obtained at fertilization rate of 64 4%(85%-30%) and at hatching rate of 57 23% (80%-25%). Fry stocked accounted for 21% (60%-4 4%) of the fertilized eggs. The adaptive temperature for spawn and incubation is 22-28℃,the optimum being 23-26℃