杂交笛鲷人工繁育技术的初步研究

Artificial Reproduction and Rearing of Snapper Hybrids(Lutjanus erythropterus×L.sebae)

红鳍侑鲷（♀，40尾）×千年笛鲷（♂，45尾）杂交，得到受精卵2．2kg，浮卵率为78．57％，受精卵的孵化率为90．51％，共得到健康仔鱼349．2万尾；千年笛鲷（♀，30尾）×红鳍笛鲷（♂，28尾）的杂交，不成功。在水温27．5～33．5℃、盐度27．5～32．5、pH7．6～8．3、溶解氧4～6mg／L条件下，杂交笛鲷仔鱼经过32d的培育，用3个育苗池塘（面积共0．933hm^2）培育出平均全长36．8mm的幼鱼44．4万尾，单位面积培育鱼种47．57万尾／hm^2，育苗成活率为8．95％。

Snapper Lutjanus erythropterus （40♀） was hybridized with emperor snapper L. sebae （45 ♂ ） and 2. 2 kg fertilized eggs was obtained with the floated egg rate of 78. 57%. The hatching rate was 90. 51% and 3 492 000 health larvae were survival. But L. sebae （♀）× L. erythropterus （♂） hybridization was failed. The culture temperature was maintained between 27.5 and 33. 5℃, the salinity varied from 27.5 to 32.5, the range of pH value was 7. 6-8. 3, and the dissolved oxygen level fluctuated between 4 mg/L and 6 mg/L. Some 444 000 hybrid juveniles with total length 36.8mm were obtained in three ponds during 32 day rearing period at a rate of 475 700 ind. /hm^2, with survival rate of 8. 95%.