Research Article - Journal of Agricultural Science and Botany (2018) Volume 2, Issue 1
Comparative efficacy of carp pituitary extract and Ovaprim during captive breeding of Cat Fish, Pabda (Ompok pabda).
Captive breeding was conducted to compare the efficacy of CPE and Ovaprim on O. pabda and it was observed that both the inducing agents were quite effective. However, R3 (CPE) dose (5 mg/kg bd.wt. to male and 16 mg/kg bd.wt. to female) registered less fertilization and hatchlings compared to the T3 dose of Ovaprim (0.5 ml/kg bd.wt. to male and 1.5 ml/kg bd.wt. to female). As compared to the conventional hypopysation, which requires high quantity of carp pituitary extract (CPE), Ovaprim is quite effective at low quantity for inducing breeding under captivity. Vijaya kumar reported induce spawning of O. malabaricus with single dose Ovaprim 0.5 ml/ kg bw while Banik et al. reported induce spawning of O. bimaculatus with single dose Ovaprim 0.5 ml/kg bd.wt. of male and 1.5 ml/kg bd.wt. to female. Haniffa et al. advocated three different dosage of Ovaprim (0.3 ml, 0.5 ml and 0.7 ml) for induce breeding of O. malabaricus where the variations in fertilization rate were 70.87 and 91% and survival no. and rate was 58.62 and 70% respectively. Three different treatments, during the experiment ensures a high rate of fertilization (66.88 & 65.40) and hatching (78.40%), when highest survival rate was 59.8, 62.1 and 61.4% respectively with three treatments of Ovaprim.
The results of the experimental data indicate that, for successful spawning and seed production of Pabda, Ovaprim can be a better option than Carp pituitary extract. It is envisaged from the data that Ovaprim not only induce complete spawning but fertilization, hatching and survival is more ensured than CPE. Further study should be conducted for better management and understanding about the reproductive physiology, breeding behavior and larval rearing of Pabda to save this unique fresh water species.Author(s): NR Chattopadhyay