CAGE CULTURE

cage culture

1. ASSIGNMENT PRESENTATION OF AQUCULTURE IN RESERVOIR TOPIC- CAGE CULTURE COLLEGE OF FISHERY SCIENCE, NDVSU JABALPUR

2. cage culture

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.

5. CONSTRUCTION

6. 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.

7. NET- Three types of nets are present inner net, outer net & cover net. It is made up nylon, weld mesh or wooven split bamboo.

8. 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.

9. 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 cy clone.

10. FEEDING The water movement bring in nutrients & natural feed. In addition artificial feed is also given. Example- Rice bran Fish meal Soyabean cake

11. FISH PRODUCTION The fish production ranges from 3000 to 25,000 kg/ha/year in large cages.

12. 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

13. MANAGEMENT OF CAGES LOCATION PLANNING CAGE PREPRATION WATER QUALITY CONTROL SEED QUALITY ASSURANCE DISEASE ISSUE & MANAGEMENT HARVESTING