Reproductive profile of common carp (Cyprinus carpio var. communis) in relation to age
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Date
2018-06
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present study was conducted at College of Fisheries, of G.B. Pant University of Agriculture and Technology. The investigation consisted of evaluation of effect of age on reproductive performance of common carp (Cyprinus carpio var.communis) broodstock during September, 2017 to March, 2018. Two age groups (virgin and +1 year) were selected for the study. Samplings were done monthly for recording different growth and reproductive characteristics of both male and female. Conditions of both groups were satisfactory in the environment based on condition factor which was always greater than one in both virgin and +1 year and somatic condition factor. GSI and HSI had a negative relationship in both age groups. No significant effect of male age was recorded on its reproductive performance in both age groups, except spermatocrit which was significantly different in both groups. In female the age had shown a positive effect on fecundity as well as ova diameter. Ova diameter and absolute fecundity both had positive relationship with age, while relative fecundity decreased with age and was higher in virgin group females. Fertilization, hatching and survival rate showed a positive increase with age. Fertilization had a positive correlation with ova diameter. The overall progeny performance had shown that +1 year group was better than virgin group. The present study states that age consideration of broodstock may support for high quality production.
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