fisheries and marine science univarsity

1. Welcome to
Our
Presentation

2. Design & Construction of
Fin Fish Farm

3. Group : 05
1. Safa Minnat Rahma [BKH1602020F]
2. Md. Abdus Salam [ASH1602021M]
3. Shekh Farid Ahmed [ASH1602022M]

4. Necessity of Fin
Fish Farm
Throughout the centuries fin fish has been an important
component of the population’s diet in many parts of the
world. Natural fin fishes which are caught all over the
world, are not enough to meet requirement of people. So it
is necessary to culture more fin fish. For the culturing of fin
fish the first important thing is to construct a fin fish farm.

5. Why Need Design &
Construction of Fin Fish Farm
 The success of any production system in industry , agriculture
and aquaculture relies heavily on design and construction. A
well designed and constructed system provides the foundation
for successful operations. Aquaculture has developed some
unique equipment and some unique uses for equipment.
 Typical fish farm was developed by forming small ponds by
hand, or an even simpler method of trapping tidal water flow in
estuaries by building simple water retaining structures.

6. Methods of Fish
Farming
 Extensive
 Semi-intensive
 Intensive

7. Guidelines for Design & Construction of
Finfish Farm
 Designing containment structures
 Farm layout
 Containment structures
 Buffer zones
 Intake and discharge points
 Engineering plans and drawings
 Building containment structures
 Notification
 Site preparation
 Material suitability
 Placement of material
 Compaction
 Documents and records
When building a fin fish farm, there are a number of processes and
guidelines that you should follow. These guidelines contain detailed
information on the following:
 Monitoring pond structures
 Purpose
 Visual inspections
 Groundwater monitoring

8. Planning of Fin
Fish Farm
Investment is an important step in farm planning. The
size of a fish farm which determined by:
 Amount of water available
 The land available and usable for fish culture
 The technology to be employed.
 The target production
 Capital available for investment

9. The number and the shape of ponds which determined by:
 Land size
 Topography of the land
 The species to be produced
 Frequency of harvest
 Target quantity per harvest
 However, rectangular ponds are easier to manage.
Planning of Fin Fish
Farm(cont… )

10. Selection of region:
 Knowledge of local geography, climate and weather
 Free of pathogens , pollution and undesirable organism
 Open space for aeration
 Future expansion of the project
 Susceptibility of the site to flooding
 Availability of suitable manpower to operate the farm
 Proximity of markets easy transportation
 Electricityand water availability and good temperature and soil.
Planning of Fin Fish
Farm (cont… )

11. Legal issues:
Consider whether or not there are any legal issues that
will affect your ability to culture fish at this site. For this
the following matter should be considered-
 Land use act,
 Water act,
 Environmental management and
 Coordination act, others.
Planning of Fin Fish
Farm (cont… )

12. Design &
Construction
 It is very important to consider the layout of the ponds in relation to the topography of land, the source of
water, and drainage. Also important is to allow for expansion of the fish farm at a later stage
 A well-built pond is easier to operate, so careful attention to all the features of a pond will be well
rewarded later.
Layout of Ponds
Pond Size, Shape & Depth
 The size of Ponds should be 0.5–2 ha. are easy to manage
 Most farmers build squre and rectangular ponds, though irregularly shaped and even round ponds have
been built.
 With rectangular ponds, the long axis of the pond can be placed to take advantage of winds blowing across
the pond that aerate the water.
 rectangular ponds are more suitable for harvesting fish with a siene net
 The pond depth is usually in the range 1–2m, and often is a compromise determined by topography, water
source and soil.

13. Pond Bottom
 The pond bottom slopes gently towards the outlet end of the pond
 A minimum bottom slope of 0.1–0.2% is recommended
 The pond bottom should be smooth and free from bumps and hollows
 To make it easier to haul the seine nets and to catch as many fish as possible

14. Dyke
 The dyke is the part of the pond above the natural ground and is for retaining the
water.
 It is important that the dyke walls are sloped to prevent erosion and avoid enlarging
of the pond.
 The slope on the inside of the dyke should be somewhere from 2:1 to 3:1.
 The slope on the outside of the dyke can be steeper at about 1.5:1 to 2:1

15. Water Inlet
• An inlet is to let water into the pond.
• The location of the inlet will depend on the shape of the land in relation to the water source.
• There are various types of inlets that can be used, for example pvc pipe
• A PVC pipe of 25–50mm in diameter is sufficient in most cases.
• Water inlets should have a screen to keep out wild fish, twigs, leaves and other trash
Water Outlet
 An outlet is to let water flow out of the pond.
 The outlet should be at the deepest end of the pond so that all the water can be drained out of the
pond by gravity.
 The diameter of the outlet pipe depends on the size of the pond. Usually 100–150mm is adequate
for small (500–1000m2) ponds.
 For larger size ponds, pipes with a larger diameter can be used, or several 100mm pipe

16. Water Overflow Pipe
An overflow is an extra pipe to let excess water flow away during
heavy rainfall. It should be placed towards the outlet side, about 20–
30cm below the top of the dyke, about 20cm above normal water
level. The overflow pipe should also have screen to prevent the fish
escaping.