COMPARATIVE EFFICACY OF DIFFERENT DOSES OF OVAPRIM (SYNTHETIC SALMON GONADOTROPIN-RELEASING HORMONE AND DOMPERIDONE) IN INDUCED BREEDING OF COMMON CARP (CYPRINUS CARPIO)
Keywords:
Induced breeding, Common Carp, Ovaprim, Cyprinus carpio, Gonadotropin releasing hormone, DomperidoneAbstract
Background
Having no previous attempt in Common carp in Pakistan, we intended to assess the impact of different doses of Ovaprim on various reproductive parameters of Common carp in a semiartificial condition.
Methods
A complete randomized design with one factor, four treatments, and three replications was used in experimentation. Ripe brood stock weighing 2 kg on average (48 in number) were placed in spawning tanks with a male-to-female ratio of 2:1. The treatments involved injecting different doses of Ovaprim: T 0 (control group), T 1 (0.3ml/kg to females_0.1 ml/kg to males), T 2 (0.5ml/kg to females_0.2 ml/kg to males), and T 3 (0.7ml/kg to females_0.2 ml/kg to males).
Result
With water quality parameters within the recommended ranges throughout the study period, the standard dose of Ovaprim (0.5ml/kg for females_0.3ml/kg for males) yielded optimal results in terms of latency time (5 hours), fecundity (272000 eggs/kg of gonads), fertility (81.76%), hatching (83%) and survival rate (91.98%). While deviations led to decreased outcomes.
Conclusion
The recommended dose of Ovaprim affected all stages of reproduction from ovulation till survival and led to higher yield in Common carp in comparison to lower or higher than recommended dose. This is indicating the activation of cascade hormonal system at optimum level than the other doses with no specific effect due to species selection.
