1.
Seminar on

2.
SYNOPSIS
 Introduction
 Definition
a. semi-intensive
b. intensive
c. super-intensive
 Cage culture system
-Types of cage
a. Fixed cage
b. floating cage
c. submersible cage
d. Submerged cage
 Conclusion
 References

3.
INTRODUCTON
There is a large cultivable area of stagnant fresh water in this
country in the form ponds, lake, and tanks, of which only a
small part is utilized for fish culture.
Presently less than 50% of the cultivable area of fresh water, is
being utilized for fish culture.
The net production of fish from a pond can be considerably
enhanced using scientific method of feeding, breeding etc., and
the whole process is called ‘fish culture’.
Harnessing all the cultivable bodies of water using scientific
method of culture, offers an immense scope for the
development of fisheries in India.

4.
• This is a transitional stage between the extensive and intensive, and full
potential of the ponds in not utilised.
• Semi intensive fish culture system is more prevalent and involves rather
small ponds(0.5 to 1 hectare in an area) with higher stocking density
(10000 to 15000 fish/ha).
• Basically in this system care is take to develop naturals food by fertilization
with/without supplement food.
• However the major food source is natural food.
• Yield is moderate (3 to 10 ton/ha) and survival rate is high.
• Low cost get more profit
• More fish can be reared in natural ponds as compare to extensive.
a. Semi intensive system

5.
Semi-intensive system

6.
b. Intensive system
• The ponds may be small size, but the total production of fish is very
high.
• Natural food is increased by using fertilizer, and fish are fed on
artificial food also.
• The farm is managed scientifically and efficiently
• The mortality of fry and fingerling is reduce
• A suitable combination of fish species is used to obtain maximum
yield
• Costly and high profitable
• Water change, aerator use, water filter , use fertilizer etc,.

7.
c. Super-intensive system
• Super intensive is also known as ultra-intensive.
• Ultra intensive culture ponds are little more than culture vessels through
which large amount of material and energy are passed under the close
attention of skilled attendants and business managers.
• Small area and get high production
• Excesses use of fertilizers/chemical to make water fertile, more use of
aerator to mix more oxygen in water.
• Number of fishes should be high
• RAS( Recirculatory aquaculture system) and bio floc is the example of super
intensive.
• Super intensive mostly used in culture of shrimp and prawn culture

8.
Cage culture
• Culture of fishes in meshed boxes places in water is called cage culture.
• It is an intensive method of aquaculture.
• cage done on large water body, where water flow is good
• It done in river, estuaries ,sea and reservoir.
• Stocking density:- there is no standard stocking density for cage. The
probable stocking density is given below-
I. Carp fry - 210/m sq.
II. Carp fingerling - 40/m sq.
III. Tilapia - 150/m sq.
IV. Murrel - 40/m sq.

9.
Types of cage
4 types of cage are being used for cage aquaculture.
• Fixed cage
• Floating cage
• Submersible cage
• Submerged cage

10.
Fixed cage
• Fixed cage in fixed in location it can not move.
• It is used is shallow water body with water depth of 1-3m in reservoir.

11.
Floating cage
• Floating cage is supported by a floating frame where in net bags are
kept hanging in water without touching the basin.
• Water bodies in depth more than 5m in reservoir.

12.
Submersible cage
• Submersible cage have net bags suspended from surface with
adjustable buoyancy
• It may be rigid or flexible

13.
Submerged cage
• It have net bag fitted in a solid and strong frame and submerged
under water
• Operational mainly in marine environment.

14.
Conclusion
The main motive of culture is to increase the production of fishes it can
be do intensive, semi intensive or super intensive. It help in increase
production as well as income of farmer. It play vital role in GDP of India.
Culture system help to do culture proper and easily with the guidance
to produce more fishes in less expensive.

15.
References
1. An Introduction to fish biology and fisheries: S.S. Khanna & Neerja
Kapoor
2. Fish and fisheries: Pandey & Shukla
3. A textbook of fishery science and Indian fisheries: C.B.L Srivastava &
Sushma Sarivastava