Self-employed crab farming
Mud crab farming
Mud crab
Mud crab is becoming more and more popular
due to the high demand in the export market.
Commercial crab farming is now spreading
rapidly in many areas.
Larger species:
Larger varieties of crabs are called 'green
mud crab' in the regional language
It can grow to a maximum width of 22 cm and
a weight of 2 kg.
These are free to live. On these toes, many
angular lines can be seen.
Small Types:
Smaller varieties, called 'Red Claw'
They can grow to a maximum size of 12.7 cm
and a weight of 1.2 kg
Many of these angular lines do not appear.
These are the habit of digging.
Both types have high demand in the local
and overseas market.
Methods of rearing
Mud crabs can be reared in two ways
01.Grow - Out method
In this way, the young crabs can be reared
(5 to 6 months) until they are sufficiently grown.
In this method, ponds are commonly used for
the cultivation of crabs.
The size of the pond can range from 0.5 - 2
ha. There should be adequate inflow and the possibility of sea water
conversion.
If the pond is small, there should be
fences. In natural large ponds, areas where water exits should be strongly
protected.
Seedlings of young wild type crabs, up to
10 to 100 g, can be kept as seed crabs.
The rearing period is from 3 to 6 months
Feed from 1 to 3 crabs per square meter and
provide supplementary feeding.
Along with commonly considered fish, other
foods available in the area may be fed to crabs. (5% of body weight should be
fed per day)
Take frequent growing lobsters and monitor
general growth and health.
Surgery of the appropriate weight from the
third month. With this number reduction, other crabs are likely to grow better.
2. Fattening (thickening) method
Soft tile crabs can be bred for several
weeks, until the outer tile is thickened. These hard-tailed crabs are fed into
the mound (flesh) of the vertebrae. These can be sold for three to four times
more expensive than regular soft crabs
a. Thickening pattern in pots
Thickening method can be handled in coastal
ponds of 0.025 - 0.2 ha with water depth of 1 - 1.5 m.
Before releasing the seed crabs, the bottom
of the pond should be drained, dried by the sun and placed in a sufficient
quantity of lime.
The drawings of the pitcher should be free
of holes, free of cracks. Special attention should be given to religious areas.
This is because the crabs will escape.
The gateway area should be reinforced with
bamboo flow.
Bamboo sticks and netting should be
properly fenced. To prevent crab drying, these fences need to be sloped inside
the hut.
From fishermen or crab sellers, buy
seedlings of crab, depending on the size of the plant, to make it 0.5 to 2 per
square meter
In the market, craki is high for crabs
weighing over 550 grams. Therefore, it is advisable to seed these crabs as seed
crabs. When this happens a square meter should be placed.
Depending on the area and the availability
of water crab, 6 - 8 thickness cycles can be handled.
If the breeding pod is large, it should be
divided into different beds. It can be divided and grown in different beds in
different sizes. This makes it easy to feed, monitor and harvest
If the seed crab spacing is high, you can
put the same crabs in the same passage.
Male crabs can reduce the onset of painful
male crabs by raising the female crab in separate beds. By placing shelters
like old tires and bamboo baskets, you can protect yourself from attack
b. Thickening system
Crab ponds can be grown in sewage or large
shrimp ponds with a bracket, floating net or bamboo cage.
Nets can be made with netlon or bamboo
poles.
The size of the cage is 3 m x 2 m x 1 m
Food is easy to feed and maintain by
stacking the nets.
10 crab per square meter cage and 5 crab
per square meter cage. Because there are more cages in the cage, the tip of the
crab should pinch. This makes the attack less likely.
However, this is not as popular as in the
pond.
Compared to Qro - Out and Thickening
methods, the thickening method is more profitable in the short run. Due to the
lack of crab seeds and commercial food in India, the croout method is not
popular.
Food
C.
Crabs are fed daily with fresh fish and
baked chicken meat, at a rate of 5-8% by weight. If two meals are served in a
day, a large portion should be served in the evening.
Water quality
Given below
The quantity given below should be durable
Salinity:
15-25%
Heat:
26-30 ° C
Bio gas:
> 3 ppm
Alkaline acidity:
7.8-8.5
Harvesting and selling
Properly monitor the psoriasis of the
crabs.
Harvesting should be done at dawn or in the
evening.
Harvested crabs should be washed with good
salting water to remove dirt and mud. They should be tied so that their legs do
not break.
Harvested crabs should be kept in humid
conditions. They should be protected from sunlight. This is because sunlight
can increase the mortality of crabs
Can be grown in small puddles
In the first week, feed at the rate of 10%
of the lobster weight, and then 5%. If food is not wasted and water quality is
poor, food plates can be used.
In well-maintained ponds, it can be grown
up to 8 times
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