fresh water prawn.pptx

fresh water prawn

1. Topic Fresh water prawn Sub- Freshwater Aquaculture production Presented by Abhishek , gaurav Acharya Narendra Deva University Of Agriculture And Technology, Kumarganj , Ayodhya

2. Introduction Freshwater prawn farming has emerged since early 1960 in world, in India 1990. Marine shrimp are grown in earthen ponds located in coastal areas of countries with tropical and subtropical climates. The fresh water prawn attains a good size in relative less time. Fresh water prawn commonly inhabits the Indian lakes, reservoirs, ponds and low salinity areas. Prawn farming quickly expanding area.

3. Fresh Water Species: Fresh water prawns of the genus Macrobrachium are very suitable for intensive culture. The main species of Macrobrachium are as- Macrobrachium rosenbergii Macrobrachium malcomsonii Macrobrachium birmanicum Macrobrachium rude Macrobrachium idae River Pond

4. Classification of fresh water prawn ( Macrobrachium rosenbergii ) Kingdom : Animalia Phylum : Arthropoda Class : Crustacea Order : Decapoda Family : Palaemonidae Genus : Macrobrachium Species : rosenbergii ( giant river prawn)

5. Identity and morphology The adult Macrobrachium rosenbergii can easily be identified from other species in the genus by the following characteristics: Adult male has a pair of very long legs (chelipeds). The rostrum is long and bent in the middle with 11-13 dorsal teeth and 8–10 ventral teeth. The movable finger of the leg of the adult male is covered by a dense mat of spongy fur. Distinct black bands on the dorsal side at the junctions of the abdominal segments

6. Identification of Male & Female Male Female Comparatively large the female 2 nd pair of walking legs longer and thicker with large spines Genital pores are located at the base of the 5 th pair of walking leg. The second pair of swimming legs has an additional process called appendix masculin Periopods are closely arranged. 1. Smaller than male size 2 .Even though longer than other walking legs ,it is thin and slender 3. Genital pores are located at the base of 3 rd pari of walking leg. 4. Appendix masculine is absent . 5. Receptacle area is present in between peiopods .

7. Life Cycle The prawn attains mature when it is about 4 months old. The mature adult migrate to estuarine areas for breeding . Initially the egg are orange in colour which changes to brown and finally to dark brown before hatching. Normally the eggs hatch out in 18 to 23 days time. Attain PL stage in 18 to 25 days duration. The PL migrates to fresh water and grow to juveline and finally to adult stages.

8. Fresh Water Prawn Farming Concepts Fresh Water Prawn Culture are grown in earthen ponds located in coastal areas of countries with tropical and subtropical climates. Ponds are filled with freshwater, Prawn is reproduced and raised in captivity are stocked into the ponds and are ready for harvest in 90 to 120 days.

9. Farming of Fresh Water Prawn Fresh Water Culture are depend upon following things: 1) Location of farm 2) Farm Permits 3) Farming Strategies 4) Pond Construction 5) Crop Species & Feeding 6) Stocking 7) Management 8) Harvesting

10. Water quality Freshwater from a river, stream or lake, rainwater, or groundwater can be used. Hardness (as CaCO3) should be in the range 50- 100 ppm. Seawater is needed to mix with the freshwater to produce brackish water for the larvae. The seawater is disinfected with 10 ppm of calcium hypochlorite and stored for at least a week before use.

11. Water Quality for Grow out pond Temperature: >= 68F Salinity: 0.5-35 ppt Dissolved Oxygen: >= 5 ppm pH: 7 - 8.3 Unionized Ammonia: < 0.01 ppm Nitrite: ≤ 1.0 ppm Nitrate: <= 60 ppm

12. Management Fertilize ponds prior to stocking Feed good quality prawn feed -35% protein-3-5% bwt per day Provide aeration when necessary

13. Harvesting Harvest in October month Drain and seine pond net Direct market or sell to processor Store after dry