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Journal of Fisheries and Aquatic Science
Year: 2008  |  Volume: 3  |  Issue: 2  |  Page No.: 137 - 144

South Indian Technology of Nursery Farming for Better Survival and Production of Macrobrachium rosenbergii (De Man)

P. Soundarapandian and A. Kannan    

Abstract: In the present study, the nursery culture was practiced in 4 different farms (A, B, C and D). The salinity was ranging between 0-4 ppt and alkaline pH (7.0-8.3) was maintained by adding lime in all 4 ponds. The temperature fluctuations were not beyond the optimum (26-32°C) and the dissolved oxygen level was ranging between 3.5 to 6.5 ppm throughout the culture period in all four farms. Optimum transparency (31-42 cm) was maintained throughout study period. The food conversion ratio of the present study ranges from 1:1.23 to 1:1.47. The survival rates of farms A, B, C and D were 78, 83, 80.32 and 81%, respectively. The maximum average body weight of 22.0 g in male population and 19.70 g in female population was reported in farm A, where the crop pattern is 5 seeds/m2/110 days. Whereas in farms B, C and D the crop pattern was 11 seeds/m2/70 days, 15 seeds/m2/70 days and 20 seeds/m2/70 days, respectively. The average body weight of females in the farms B, C and D are 4.16, 5.30 and 3.75, respectively. In farm A, all the female’s population with the average body weight of 19.70 g was sold out in good price. The total (482 kg) production also high in farm A where as B, C and D farms it was 85, 277.38 and 280.62 kg, respectively. Extension of nursery culture up to 110 days, proper water quality and feeding management in nurseries and low stocking density are reported to get the maximum growth and total production in farm A. This is highly profitable business those who are maintaining their own ponds. The nursery culture period in farms B, C and D was 70 days. The male production in farms B, C and D were 7,400, 20,060 and 24,652 numbers, respectively. So, the culture period of 70 days and semi-intensive type of culture is found more profitable for male scampi seed selling farmers.

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