The rice-fish culture is an innovative farming system in which, rice is the main enterprise and fish fingerlings are taken as additional means to secure extra income. Before releasing of fish seed to paddy field the paddy transplantation from rice seed beds to main paddy fields is done in the month of April, and there after paddy is left for two weeks for strengthening of paddy roots, the fish seed nos. After the completion of bund construction the base of paddy fields are leveled with the help of spade and local made wooden plates. The timely weight and the measurements were taken and the fish returned to the trenches. Feeding rates were adjusted accordingly. To assess the relative profitability of using rice-cum-fish culture compare to rice monoculture.
Plankton population densities in water were determined in accordance with the standard methods described by APHA
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The mean growth rates MGR were calculated for the fish species according to the method of Wayne and Davis Subscribe to newsletter Sign up with your email to get updates about the most important stories directly into your inbox Subscribe. Care was taken to keep the water level at a minimum of 5cm to allow proper filtering therefore, the water level was kept at 30 cm deep, until the rice matures. The height of the dyke is required to be maintained between 50 and cm depending upon the topography of the plot and tidal amplitude at the site. Rice farming with- fish culture is a type of duo culture farming system in which rice is the sole enterprise and fishes are taken to initiate additional for extra income.