荷包红鲤人工诱导雌核发育研究

1987—1988两年做了4尾荷包红鲤人工诱导雌核发育试验.根据网箱培育到乌子头成活的个体与受精率的百分比,其平均雌核发育二倍体出现率为1.95%(1.1—3.4%).与亲本比较雌核发育二倍体的形态学特征无大差异.生长速度与正常受精的个体基本相同.当年鱼平均体重在30—50克之间,2龄鱼生长良好,平均体重300克以上,3龄鱼900克左右,超过同塘饲养的选育镜鲤,松花江野鲤等.但生活力明显降低,各发育阶段的池塘成活率;当年鱼为40—69%,2龄鱼(包括越冬死亡在内)为3.8—10.9%,3龄鱼为1.6%.越冬成活率:第一年为17—19.4%,第二年为39.7%.抗病力尚可,但易患立鳞病是池塘成活率低的主要原因.

Prekiminary Stuby on Induction of Gynogenesis of Red Ball Common Carp

Induction of gynogenesis of four red ball common carp was done since 1987 to 1988. Gained by comparison of the number of larvae which developed in cage with the rate of rertilization, the average occurrencerate of gynogenatic diploidy was 1.95% (range1. 1-3.4%). There is not obvious variation of morphology feature beween gynogenetic diploidy and their parent. The growing rateis about the same as that of normal fertilized individual. On the normal density, the average weight of the fish is 30-50g no the year end, it grow well and average weight is above 300g after two years, the three years fish is about 900g, surpassed selected minror carp and field common carp of Songhua river which cultured in the same pond. But the living ability obvious decrease. The surviral rate fo each development period in pond was 40-69% for noe year fish, 3.8-10.9% for ttwo year fish (including death in winter), 1.6%for three year fish, thd survival rate in winter was 17-19.4% for first year, 39.7% for second year. Itc an-tivirus ability is not bad. It seldem gets haemorrhoids, but it is easily infected by erect scale disease, that is the important reason of lower pond survival rate.