Breeding performance of indigenous carp, Labeo dero in captivity under cold water condition of Uttarakhand, India

Abstract

Aim: To study the breeding performance of indigenous carp, Labeo dero in captivity under coldwater condition. Methodology: Rearing of adult fish in pond condition, observation of gonadal maturity and GSI, standardization of optimum dose of hormone, recording of breeding parameters such as fecundity, fertilization rate, hatching percentage, incubation period, egg size and hatchling size were studied. Results : Single intramuscular dose of synthetic hormone, ovaprim @ 0.7 ml kg-1 body weight for female and 0.3 ml kg-1 body weight for male resulted in successful spawning of L. dero without post spawning mortality at 18o-22oC water temperature. Observed relative fecundity was 1,47,343 eggs kg-1 with fertilization rate of 90% and hatching rate 78%. The average diameter of the fertilized egg was 1.6-2.8 mm. Interpretation : Successful induced breeding of captive reared L. dero at 18o-22oC water temperature was observed. These findings would be helpful in seed production of L. dero, which can be used for natural stock augmentation and culture of this species