CAGE CULTURE
Download as PPTX, PDF20 likes33,295 views
Cage culture involves raising fish in mesh boxes placed in bodies of water. It originated in Cambodia about 200 years ago when cages were used to transport live fish to market. Cages are constructed with frames made of wood, plastic or steel, with floats to keep them buoyant and weights to anchor them. They come in various shapes and sizes, usually square or rectangular, and are 20-60 cubic meters. Cages are either fixed in flowing water, floating in lakes/rivers/offshore, or submerged and movable in areas prone to cyclones. Fish are fed through natural water movement and supplemental feeding of rice bran, fish meal and soybean cake. Fish production ranges from 3,000-25,000 kg
CAGE CULTURE
- 1. ASSIGNMENT PRESENTATION OF AQUCULTURE IN RESERVOIR TOPIC- CAGE CULTURE
- 2. cageculture
- 3. INTRODUCTION • Culture of fishes in meshed boxes placed in water is called cage culture. • It is an intensive method of aquaculture. • Cage culture is practiced in areas where there is sufficient water movement. • It is done in river,estuaries & seas.
- 4. HISTORY • Cage culture originated in kampuchia about 200 years ago. • Originally cages were used to transport fishes alive from the capture area to the market area.
- 6. CONSTRUCTION
- 7. COMPONENTS OF A CAGE • FRAME- It can be made up of wood, plastic or steel. Generally plastic is used. • FLOATS- They are made up of empty barrels or polythene balls. • SINKERS- They are made up of stone concrete or metal.
- 8. • NET- Three types of nets are present inner net, outer net & cover net. • It is made up nylon, weld mesh or wooven split bamboo.
- 9. STRUCTURE OF CAGE • The cage may be square, rectangular, circular six sided or eight sided. • Generally, square and rectangular cages are prefered for culture. • Normal size of the cage is 20 to 60 metre cube.
- 10. TYPES OF CAGES • Based on installation cages are categorised into following types- • FIXED CAGES- Installed in running water • FLOATING CAGES- Lakes,rivers & offshore water. • SUBMERGED & MOVABLE CAGES- Areas affected by cyclone.
- 11. FEEDING • The water movement bring in nutrients & natural feed. • In addition artificial feed is also given. • Example- • Rice bran • Fish meal • Soyabean cake
- 12. FISH PRODUCTION • The fish production ranges from 3000 to 25,000 kg/ha/year in large cages.
- 13. STOCKING DENSITY • There is no standard stocking density for cages. The probable stocking density is given below- • Carp fry- 210/metre cube • Carp fingerlings – 40/metre cube • Tilapia 150/metre cube • Murrel – 40/metre cube
- 14. MANAGEMENT OF CAGES • LOCATION • PLANNING • CAGE PREPRATION • WATER QUALITY CONTROL • SEED QUALITY ASSURANCE • DISEASE ISSUE & MANAGEMENT • HARVESTING