Journal of Ecophysiology and Occupational Health

R. S. Chauhan ¹

Affiliations
1 Department of Aquaculture, College of Fisheries, G. B. Pant University of Agriculture and Technology, Pantnagar- 263145, (U. K.), IN

Abstract

Fifty fingerlings of common carp, Cyprinus carpio were stocked in each of four rectangular tanks. The formulated fish feed comprised of deoiled groundnut cake, rice polish, poultry dropping and vitamin-mineral feed supplement. The fishes in the tank T1 were fed with control diet D1 (0% poultry dropping) and the fishes in tanks T2, T3 and T4 were fed with test diets D2 (10% poultry dropping), D3 (15% poultry dropping) and D4 (20% poultry dropping), respectively. All diets contained around 30% protein. The fishes were fed @ 5% of total body weight/day in two equal installments, one in the forenoon and other in late afternoon. Fishes were sampled fortnightly. Water quality parameters were monitored regularly. Highest specific growth rate (0.26%/day) was recorded in tank T2 where fishes were fed with 10% poultry dropping incorporated diet. The experimental fishes recorded the value of exponent 'n' in the range of 3.37 to 3.57, coefficient of correlation 'r' in the range of 0.9938 to 0.9987 and coefficient of determination 'r2' from 0.9876 to 0.9974. More than 98% of experimental fishes departed from cube law of length-weight relationship towards higher side. The Condition Factor 'K' from 1.94 to 2.0 of experimental fishes indicated the well being and good condition of fishes. The analysis of muscle composition of fishes revealed that the protein content in muscle increased with the increasing amount of incorporated poultry dropping in fish feed.

Keywords

Specific Growth Rate, Condition Factor, Formulated Feed, Isometric Growth

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Shashank Singh ¹, R. S. Chauhan ¹

Affiliations
1 Department of Aquaculture, College of Fisheries G. B. Pant University of Agriculture and Technology, Pantnagar Uttarakhand-263145, IN

Abstract

Giant freshwater prawn, Macrobrachium rosenbergii, is a high value cultured aquatic species, commonly called as 'scampi' in trade circles. An experiment was conducted at Instructional Fish Farm of the College of Fisheries, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar in four rectangular earthen ponds each of the size of 0.033 ha in tarai agroclimatic regime of Uttarakhand. The stocking of PL 10 was done @ 60000/ha. The pre-stocking management of the ponds included dewatering, drying, liming, organic manuring and watering of ponds. The water quality parameters were monitored regularly. The larvae were fed with starter feed upto 60 days of rearing when the larvae attained average weight of around 4g. Thereafter, juveniles were fed with grower feed @ 5% body weight twice a day in two equal splitted doses. The sampling of the prawn was done at fortnightly intervals. The average weight of the prawn at the time of stocking was 0.04g while after 180 days of culture at the time of harvesting the prawn attained average weight of 25.37 ± 14.21g with 76.95% survival. The average absolute growth rate of 0.140 g/day and specific growth rate of 1.55% was achieved during the experimental period. The calculated gross production of 1183.159 kg prawn/ha/crop of 180 days was obtained. The result of the study inferred that the culture of giant freshwater prawn, M. rosenbergii, is feasible in tarai agroclimatic regime of Uttarakhand. The fish farmers of the area can earn their sustainable livelihood through scampi farming.

Keywords

Macrobrachium Rosenbergii, Growth, Survival, Production.

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