Commercial Carp Egg Hatching Devices

Detail aCCOUNtS OF
DiFFeReNt COMMeRCial
CaRP eGG HatCHiNG DeViCeS
jitenderanduat@gmail.com

INTRODUCTION TO
HATCHERY SYSTEM
INTRODUCTION TO
HATCHERY SYSTEM
Aquaculture traditionally depends on the supply of fish seed from
natural sources till the early 50’s
Usually there were wild catch from the natural bodies mainly the rivers
and the wetlands
But there were the demerits of the wild catch so some alternatives were
thought
The hatchery operations entered the golden age when hypophysation
techniques evolved
With the development of induced breeding the efforts were made to
provide the conducive environment responsible for spawning and
hatching
Its was the beginning of hatchery revolutions

DIFFERENT TYPES OF
HATCHING DEVICES:
Hatching pits
Chitagoan type of hatching pits
Glass jar hatchery
Transparent Polythene Jar Hatchery
Shirgur Bin Hatchery
Hanging Dipnet Hatchery
Plastic Bucket Hatchery
LDPE-D-80 Model
LDPE-D-81 Model
Portable Circular Hatchery
Cement Circular Hatchery

HATCHING PITS:HATCHING PITS:
This is the most primitive type of hatching device
Mainly used in the bundh type of breeding in W.B
The earthen pits are dug in the ground of size 3x2x1
there inner wall plastered with mud
In each pits 3000 to 4000 eggs are kept for hatching
DISADVANTAGE:
It is not suitable for large scale production of spawn
production
It lead to mass mortality of the spawn

DOUBLE HATCHING HAPA
It was introduced by Dr.Alikuni
There are 2 separate Hapa
Outer hapa
Inner hapa
The outer hapa is made of marlin cloth and
the shape is like rectangular trough without
any cover and threads in its outer four
corner
Usually the outer hapa is 2x1x1 m

Cont….
• The inner hapa is made of mosquto net
• Inner hapa dimension is 1.75x0.75x0.5m
Bottom part must not touch the bottom
• Hapa must be installed where there is mild
water current
• And no algal bloom or pollution or turbid
water
• Capacity : 0.75 to1 lakh egg

cont….
Merits
Used for very small scale spawn production
Cheap
Requires less or no technical knowledge
Separates egg shell from the hatchling effectively
Demerits
Water quality cannot be controlled
The predatory fishes from outside can such the
hatchling through the hapa layers
Needs frequent replacement

GLASS JAR HATCHERY
• Introduced in India by Dr.Bhomi
• Designed by CICFRI
• Comprises of 4 parts:
1) Water supply system
2)Breeding tank
3)Incubation or hatching jars
4)Spawnery

Cont…
BREEDING TANKS
Overhead showers are fitted
2-3 breeding tanks are required for 20 glass jar
Dimension -2x1x1 or 1.8x0.9x0.9m
INCUBATION JARS
Cylindrical towards top and bottom funnel shape
Cylindrical part is 40.5 cm length 13 cm dia.
Inner and outer diameter at the bottom end are 1
and 1.27 cm respectively Capacity of each jar -6.35 l
and accommodates 50000 developing eggs
Water supply is through the bottom and regulated
by bibcork

Cont…
SPAWNERY
Overhead showers are also fitted in it.
Dimension- 1.8xO.9x0.9m.
It a nylon hapa fitted on a frame placed
inside cement system.
OPERATION
It takes 12-15 hrs to hatch out at normal
water of 26-27˚C
For IMC 0.6 to 0.8L/min
EMC 0.8 to 1L/minjitenderanduat@gmail.com

Cont…
MERITS
Can be adopted for large scale operation.
Easy view of egg and larvae.
Do not require much water
Simple in design
Water quality can be controlled
DEMERITS
Need constant vigil and care
Becomes translucent in use
Can break
Possibility of escape of egg through outlet

TRANSPERENT POLYTHENE
HATCHERY
• Same as glass jar hatchery, but polythene
is used for hatching jar
• Jar is 27cm in ht. and 10 cm dia
• Can hold 2 l of water
• Provision of egg container
• Flow of water is 1 l/min

SHIRGUL BIN HATCHERY
Also termed as aluminum bin hatchery
It has one rectangular al container and three
egg vessel
Dimension: 54x18x22 inches
Parts
1. inlet
2. outlet
3. drain pipe
4. egg container
Can hold 6 lakhs of egg

HANGING DIP NET
HATCHERY
Devised by FAO
The componets of this hatchery:
1.spawning tank
2.breeding tank
3.hatching tanks
All tanks are provided with inlet and outlet
There is provision or overhead sprayers and
aircoolers
Hanging dip net is a barrel shaped having steel
rings of 65cm and 45cm at the top and bottom
There is a 50 mm spray head fitted at the bottom
of each net

PLASTIC BUCKET
HATCHERY
This hatchery comprises of two components:
1)inner component
2)outer component
Inner component:
The outer component is plastic with aluminum
egg vessel
Outer is the galvanized iron sheet spawnery
It is cylindrical in shape and has 2 outlet in the
top and 2 inlet in the bottom
47cm height and 30cm dia.
Water holding capacity is 45Ljitenderanduat@gmail.com

LDPE D 85 MODEL
• Designed by C.I.F.E by Dr.Dwivedi is a
portable or rigid type indoor system
• Higher version of vertical jar hatchery
• Hatchery units made of LDPE
• Majour component:
• I)Breeding cum Spawnery
2)hatching unit
3)air compressor with distribution system

Cont…
The breeding unit comprises of
1)Cooling tower
2)Overhead tank
3)1/2 or1 HP water pump
4)Two large portable plastics pools of 0.9 to
2.5m dia. And 0.6 to 1.2m height and 2000 to
3000L capacity
It can be either rectangular or circular in shape
with water sprayer

Cont…
HATCHING UNIT
• It consist of 6,12,24,48 conical bottom
hatchery jars
• Capacity is 40L
• Water inlet is from the bottom
• There is a provision of egg container and
aeration
• Total capacity of egg container is 20L
• And it can hold 8 to 10 lakhs of egg
• The outlet is at the top portion of jarjitenderanduat@gmail.com

Cont….
• We can stock 20 million spawn if aeration
is provided
• It is a fiber glass or copper container of 6
m dia. And 1m height
• Incubation in this hatchery is 13 to 14hr.
• A definite speed of water is maintained

• MERITS
• Adaptable to large scale production not
very large scale
• Water quality can be maintained
• Distribution of oxygen is effective
• Additional aeration is possible
• Easy to repair without dismantling
• Not very expensive to install
• DEMERITS
• Can not lead to large scale productionjitenderanduat@gmail.com

CHINESE CIRCULAR
HATCHERY
• It is the most popular type of hatchery
• It comprises of different components
1)over head tank
2)spawning pool
3)incubation tanks
4)spawn collection tank
Overhead tank
• Capacity is 10000 to 15000L
• It must be kept at a heightjitenderanduat@gmail.com

Spawning pool
• Breeders are kept for mating
• The dia is 5 to 8m
• Bottom is slope towards the center where
the outlet is located
• This outlet leads to egg collection chamber
if any or goes to the incubation tank directly
• Inlet pipes are fitted on the wall of the tank
at an angle of 60 the pipe dia-2 to 3 inch.
• There are provision of water showers

Cont…
• At a time 150 to 200 kg male or femal can
be introduced
• Can get 9 to 12 million eggs in one
operation
• Water current is kept at 0.2 to 0.5m/sec
INCUBATION POOLS
• It comprises of two tanks
• Outer tank(3 to 6 m dia.)
• Inner tank (0.8 to 1.5m dia)jitenderanduat@gmail.com

Conti…
• Water holding capacity is 9 to 12 cubic meter
• Circular wall separetes the outer wall to inner
wall and is fitted with fine mesh
• Center of inner pipe has outlet pipe
• Inlet pipes are located in the bottom
• These are duck mouthed and fitted at an
angle of 45 degree
• Pool can hold 7 lakh egg /m3

Cont...
SPEED
• 0.4 to 0.5m/sec in 12hr
• 0.1 to 0.2m/sec in 6 hr
• Increased to 0.3 to 0.4 and continued
• From the incubation pool there is a pipe
leading to spawn collection tank
SPAWN COLLECTION TANK
• It is a rectangular tank

POTABLE CIRCULAR
HATCHERY
• It is devised for small scale farmer
• It is a low cost hatchery
• It is made of galvanized iron of 80cm dia
and 60 cm height
• Water holding capacity-300L
• The hatchery unit comprises of 2 chambers
• Outer is larger and there is a provision of
inlet pipe in the bottom made of cupper of
0.8cm dia at 60 degree

Cont…
• At the bottom there is a outlet of 3cm
which is pluggable
• Inner chamber is 28cm in dia and separated
by iron mesh grill surrounded by
monofilament cloth 40-60m
• There is a plastic pipe in the middle to
adjust the water level
RATE OF FLOW
• 8-10L/min
• 50l of egg can be harvested at the same time

THANK U……………

Commercial Carp Egg Hatching Devices

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Commercial Carp Egg Hatching Devices