Shrimp farming

Shrimp Farm

1. Shrimp Farming Place : Kattur Date : 26.02-28.03.2018 S.Tamil kaviya BFP 14016

2. Introduction Shrimp Farming is one of the most important part in aquaculture. Shrimp farming in india till 2009 synonyms with the monoculture of Tiger prawn ( Peneaus monodon ). In 1995 tiger prawn was affected by WSSV, the development of shrimp farming has been stagnant. So people have shifted to the culture of white leg shrimp P.vannamei because of SPF and SPR broodstock .

3. Biology of P. vannamei It is native of pacific coast of Mexico and central and south America. It is an omnivorous scavenger. It grows upto 20g within 100-200 days depending on stocking density. Advatages of P.vannamei : Fast growth rate Tolerate salinity level of 0 to 50 ppt Require low protein feed ( 20-35%) High survival rate Have a very good market value

4. Water quality parameters : Dissolve oxygen – 5ppm and above Temperature – 30 – 34 degree pH - 7 to 9 Ammonia – N - < 0.01 ppm nitrite – N - < 0.01 ppm Site selection : Generally clay loam soil are preferred. Shrimp farm should maintain 100 m distance from the drinking water source and 50-100m shall be away from agriculture land. Availability of road, electricity.

5. pond preparation: The water from the pond is drained completely and allowed to dry for about 1 week to release the abnoxious gases. It should be dried untill the bottom cracks. Then the bottom soils are removed and ploughing should be done. Then liming should be done to correct the pH of soil. After that fill the water in the pond upto 1m. Floc or Juice preparation: After filing the pond with water juice mixture of rice bran 10 kg ,GNOC 5kg, molasses 5kg and yeast 250g is added in the pond water for developed the plankton production. Then plankton was developed after 3-4 days. From that pond water is transferred to the other pond.

6. Stocking of pond: Stocking density (60/m2)1 lakh/acre. Size of the PL is 0.01g. PL 8 and PL 9 SPF shrimp seeds are stocking in the pond. stocking were done in late evening hrs .Before stocking O2 marine tablets is added to release the oxygen for 6hrs.Because use of aerators can be affected the seeds. Initially 2 aerators per pond is used after animal grows aerator number is increased.

7. Feed management: Feed management is more important in shrimp culture. Here the farmer use commercial feed “ Mannamei ” feed from avanthi feed ltd. Aerators should be stopped before 30 mins of feeding. First blind feed is given for 1 month after next days starter 1,2,3 feed is given for shrimps. 1kg feed is given for 1 lakh seeds. Feed is mixture with water and spread in the all over the pond. Small amount of feed is kept in the trays. The tray is checked after 2 hrs. Two trays are kept in one pond. The amount of feed is reduced in moulting period and rainy season.

8. Feeding Time: Feeding is given 4 times per day 6 am,10am,2pm,6pm. Sampling : Weekly sampling should be done on every Tuesday. 1 st sampling done at 30 th day and subsequently weekly sampling were done. Then feed is given according to the body weight. This farmer get 20g size at 90 days. Growth & Survival rate : The average shrimp body growth rate are 20 g in 90 days of culture with survival rate 70-90%.

9. Nursery culture: At the end of first culture (70days) new seeds are stocked in nursery pond and reared for 20-23 days. These seeds are immediately stocked after harvesting the first harvesting. This technique is used to reduce the DOC of shrimp culture. This way leads to high in come and production . Water treatment : After harvesting the soil sample is tested in lab then treated the water. Water is drained once in a year. This farmer is recycled the water and reused that water

10. Harvesting : Harvest done by the drag net. The net is dragged from one side to another side for 3-4 times. Harvesting is done at 50 counts ( 20g ). Economics of shrimp farm: Cost of producing 1kg shrimp (90 days)-Rs.250 Selling price of 1kg shrimp – Rs.400 Net profit - Rs. 150 After 90 days of culture, Rs. 1.5 lakh /ton of profit is obtained.

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