Stock Assessment of Three Cyprinid Fishes Along the Potamon Zone of Thamirabarani River, Eastern Slope of Western Ghats, South India
Stock Assessment of Three Cyprinid Fishes Along the Potamon Zone of Thamirabarani River, Eastern Slope of Western Ghats, South India
Durairaja Ramulu1*, Jawahar Paulraj2, Jayakumar Natarajan1, Sudhan Chandran1 Sudhir Kumar Das3, Suresh Eswaran4, Santhakumar Rajagopal5 and Padmavathy Pandurangan6
ABSTRACT
Effective management of inland capture fisheries requires information about size, growth and mortality parameters and catch per unit effort. The estimated slope b values for three cyprinids were found to be within the expected range and r2 showed high degree of correlation. The estimated growth parameters of Mirgal, Cirrhinus mrigala (Hamiltoon, 1832) (L∞ 89.25 cm, K 0.8y-1), Blackspot barb, Dawkinsia filamentosa (Valenciennes, 1844) (L∞ 22.05 cm, K 0.68y-1) and Roho labeo, Labeo rohita (Hamilton, 1822) (L∞ 47.25 cm, K 0.71y-1) and the mortality parameters of C.mrigala (Z 2.14 y-1, M 1.22 y-1 and F 0.92 y-1), D. filamentosa (Z 2.42 y-1, M 1.54 y-1 and F 0.88 y-1) and L. rohita (Z 2.87 y-1, M 1.42 y-1 and F 1.46 y-1). The estimated exploitation ratios (E) for the three species were 0.43, 0.36 and 0.51, respectively. The mean CPUE was 0.9136 kg / hr / craft. This study would suggest good inland capture fishery management plan in the potamon zone of the river Thamirabarani.
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