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