FISH FARMING IN MAHARASHTRA NAME: RAJESH K. GAVIT ROLL.NO:- 27
Selection of site• Site should be selected where water is available easily.• Soil should be mixture of sand and clay so that it has the capacity of retaining the water.• Alkaline soils are always better for good growth of fish. Before construction of pond soil testing must be done
Construction of ponds: •The size and shape of the pond depends upon the availability of land and type of production. •For an economically viable project, the minimum size of pond should be between 0.2 to 1 ha. & 4 ft deep.
Preparation of ponds• Drying of pond (ploughing)• If drying is not possible apply 10 kg mahua cake or Bleaching powder in 1 to 1.5 ft water. To kill unwanted fishes like mangur etc.• Liming of fish pond.( use 10 kg lime/ha)• After 5-7 days of liming apply 80kg f.y.m., 3kg S.S.P, 1kg urea. ( for development of plankton)
Stocking details• Rate of stocking usually depends on the fertility of the pond and the measures adopted to increase its biological productivity by manuring, artificial feeding, monitoring of growth and maintaining good health of fish. Stocking for 50 mm fingerlings:- 1. Katla:- 1125 pcs/ha. 2. Rohu:-1500 pcs /ha. 3. Mrigel:-1125 pcs/ha. , i.e 3:4:3 ratio
Water Management• Maintain Ph 7.5 to 8.5• Pond water should have 4 to 5 mg/lit. of Oxygen.
Upper Level Fish:Katla, silver carp and the big head carp are ofupper level fish. They eat food from top level.Many green little plant, insects are eaten bythem from upper level.Mid Level Fish:Fish like rohu eat food like small insects fromthis level.Low Level Fish:Mrigel, mirror carp are of low level fish. Theyeat insects, snail, oyster, small plant from thislevel.
Supplementary feeding:• For Indian Carps ( katla, rohu, mrigel) rice bran, Groundnut cake & Wheat bran we have to mix it according to required protein content.• First two to three month give feed 6-7% of there weight.• After Three month give feed 4-5% of there weight.
Harvesting• Harvesting is conveniently done either by drag netting or by cast netting (useful for small ponds) or by draining the pond.• Supplementary feeding is stopped a day before the date of harvesting.• Harvesting is done during cool morning hours as per the demand of market.• The best time of harvesting is December and January which are non-productive months for fish farming.
Economics of fish farming FOR 900 m2DURATION FOR PRODUCTION 10 TO 12 MONTHSSTOKING CAPACITY 650 PCS OF FINGERLINGSMORTALITY 10%AVERAGE WEIGHT 750 gm/ pcEXPECTED PRODUCTION 440 KgFEEDING RATIO ( FISH: FEED) 1:1.75TOTAL FEED REQ. 770KgSELLING RATE 160/-COST OF PRODUCTION 27725/- RSGROSS PROFIT 70400/-RSNET PROFIT 42675/-RSCOST BENEFIT RATIO 1:1.53