Study on Large Scale Artificial Propagation of Schizopygopsis younghus-bandi Regan
In order to explore artificial large-scale propagation technology of Schizopygopsis younghusbandi Regan,8 batches of parents of Schizopy-gopsis younghusbandi Regan were obtained in March 2021 and parental length,weight and fecundity were measured.Then DOM and LHRH-A2 were used for artificial oxytocin of Psilopygopsis lassa,and the oxytocic rate,effect time,oviposition,fertilization rate and hatching rate were counted.The results showed that the body length of 52 experimental fish was(37.97±2.01)cm,the body weight was(764.38±113.79)g,the absolute fecundity was(21667±2864)grains,and the relative fecundity was(45.56±11.67)grains per gram.With the increase of body length and weight,the absolute fecundity increased linearly and the relative fecundity decreased linearly.Among 356 fishes measured,the highest proportion of body length was(34-38)cm(68.28％)and that of body weight was(500-800)g(72.47％).The percentage of body length and body weight were normal distribution.There are 8 batches of 522 females of Schizopygopsis younghusbandi Regan,and the total rate of labor induction was 92.27％.The time of oxytocin ef-fect was 48-72 hour,accounting for 70％in 48 h and 30％in 72 hour.The time of inducing labor of male fish of Schizopygopsis younghusbandi Regan was 24-72 hour,and the rate of inducing labor was 100％.The total number of eggs in 8 batches was 6.342 million,with an average fertilization rate of 90.57％and an average hatching rate of 70.30％.Therefore,the combination of DOM and LHRH-A2 to induce the production of Schizopygopsis younghusbandi Regan could result in better induced rate,fertilization rate and hatching rate.
万方数据
维普
