Author(s): Shivakumar, M, Seema Bala, C Rajanna, Naveenkumar, B.T

Abstract: Till recently, carp seed rearing and farming at any scale was highly profitable because of the low inputs costs. But it no longer continues, as the cost of basic inputs like cow dung, poultry manure, ground nut cake, rice bran and land costs are increased by many folds while the gate value of the fish seed and fish remained almost constant. This assessment was carried out in 258 villages of Southern Karnataka and found out that fish seed rearing for 50 days, the BC ratio in catla 1.59, rohu 2.91, common carp 2.05 and grass carp 3.4. The return on investment (RoI) is high in grass carp (2.61) followed by rohu (2.32), common carp (1.81) and catla (1.52). In fish culture for 10 months period, the BC ratio in feed based farming was 1.05 as against 0.47 in conventional feed based system and 0.53 in extensive method. The RoI was 0.86, 0.61 and 0.29 in feed based, conventional feed and extensive method respectively. Inrnsecond year, the RoI was increased to 2.05, 1.47 and 1.53 respectively. Though the rates of inputs vary from place to place, the present study gives the economic trend so that farmers, entrepreneurs can plan their scale of operation based on the resource and capital.

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