practices. Culture systems, from extensive to intensive, have been developed depending on the varied input use. The technologies of seed rearing, comprising rearing spawn to fry in nursery and farther fried to fingerlings in rearing ponds have been accepted as economically viable activities farmer’s level throughout the country. Indian freshwater aquaculture is
mostly based on few species e.g. about 90 percent of production is contributed by Indian major carp viz., Catla, Rohu and Mrigala and exotic carp viz., Silver carp, Grass carp and Common carp (Table: 3). Carp culture is undertaken mostly in earthen ponds, irrigational tanks, reservoirs etc of varying dimensions. Over the years, several
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WA2015 - Jeju Island Korea May 26-30, 2015 March-April 2015 | INTERNATIONAL AQUAFEED | 41
culture practices were evolved in the country for different water resources utilising a wide spectrum of fish species, fertilisers and feed resources as main inputs. The standardised packages of practices for carp polyculture include pond preparation, liming, fertilisation, stocking management, supplementary feeding, water quality management, health management etc. With an understanding of the biological basis of fish production, a series of systems are available with varying levels of inputs and outputs (Table: 4). Farmers of Andhra Pradesh, particularly in the Krishna, East Godavari and West Godavari Districts has innovated several new techniques of carp culture and those have contributed to increase the carp culture productivity in the country substantially. Farmers in this state are now able to get an average production of 8000 kg/ha/year with Rohu as the most dominant species in the culture system. This impressive production has been made possible by adapting the following various techniques in culture system: • Stocking of stunted fingerlings of larger initial weight.