Vol. 6, Special Issue 4 (2018)
Assessment of Gonadosomatic index and maturation of an Indian major carp Cirrhinus mrigala (Ham.)
Author(s): Suday Prasad, CS Prabhakar and Ajay Kumar
Abstract: Estimation of accurate maturity and spawning period play a significant role to evaluate reproductive potential of fish. It also helps to understand the dynamics of fish population, productivity trends and spawning stock biomass for successful and profitable aquaculture. In the present studies were undertaken on gonadal maturity and gonadosomatic index (GSI) of an Indian Major Carp (IMC) Cirrhinus mrigala (Ham.), in the spawning season from April 2018 to August 2018 were evaluated. Ovarian mean weight of the carp ranges from 77.50 to 131.50 g. The ovarian weight in fully mature fishes was almost 20% of the body weight. In this study, it has been found that the gonad of the fish increased with increase in size and weight of fish. The average weight and length of fish were ranged from 504.63 to 685.88 g and 31.16 to 38.05 cm, respectively. The gonads attained the maximum & minimum weight of GSI values 26.32 gm and 18.13 gm in the month of May and August, respectively. In the month of April, stages of ovaries were found advanced maturing and mature phase, whereas % of gonads in the body cavity ranges between 85-100%. The peak value of Gonadosomatic index was observed during May to June indicating the peak spawning period of the species. The fish has only one spawning season of short duration ranging from May to June. The result of the present study will help to plan an early seed production culture of C. mrigala in agro-climatic conditions of Bihar for better rural livelihood and nutritional security.
Pages: 203-206 | 701 Views 100 Downloads
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How to cite this article:
Suday Prasad, CS Prabhakar and Ajay Kumar. Assessment of Gonadosomatic index and maturation of an Indian major carp Cirrhinus mrigala (Ham.). International Journal of Chemical Studies. 2018; 6(4): 203-206.
