Comparison of reproductive condition and growth performance of introduced (first generation) and native common carp (Cyprinus carpio) breeders

The necessity of the present study was to compare the reproductive performance and growth of offspring of common carp (Cyprinus carpio) breeders imported from China (first generation) and conventional breeding. For this purpose, before the final mating of breeders, 10 male and female breeders who were the same age and received the same diet were randomly selected from each group and separated to reduce the probability of spawning in the breeding tank to zero. After maturation, LHRH along with metoclramide was used for two-stage injector in female and one in inducer in male. Then, reproductive performance including yield percentage, hatching percentage, fertilization percentage, larval survival percentage and also progeny growth performance including feed conversion ratio and specific growth rate for each group were examined. In the results of reproductive yield, the amount of productive weight in common carp was higher and showed a significant difference compared to F1 generation carp (P <0.05). Egg rate, yield percentage, number of eggs, number of eggs per gram, percentage of fertilization, number of fertilized eggs, hatching percentage, number of hatched larvae, number of hatched larvae and incubation survival in F1 generation carp group more than common carp group Was and had a significant difference (P <0.05). Feed conversion ratio and specific growth rate of F1 generation carp increased compared to conventional farmed carp and showed a significant difference (P <0.05). Therefore, the use of F1 generation carp to improve growth factors and reproductive conditions is recommended to increase economic productivity.Keywords: F1 generation carp, common farmed carp, growth, reproductive performance