Fisheries Development,Freshwater Fish,Seawater Fish, Selling Vaccines Fish

Thursday, March 28, 2013

Yummy Soft Shell Crabs / Ngglemburi Crab / Soka Crabs, what is it ?

What exactly is it soft shell crabs?

Crabs belong to the class of animals called arthropods in which the cantilever body formed from the shell that surrounds the outside of the body. Crab growth is crucial due to grow into a bigger crab must shed the old skin and then the skin new larger size will take his place. The event is known as molting that occurs many times during the life cycle of crab whose frequency decreases with increasing age and size.

Molting is a natural phenomenon which is very interesting to know. Data show that, mangrove crab molting activity can have two peaks in the month at the height of neap tide and full moon. 

Although not all individuals follow the pattern. shortly before molting crab, crab has provided basic new skin underneath the old skin. At the time of the calcium absorbed from the old skin to become more fragile or flexible. Old skin separated at the back of the crab and caught the back of the carapace. However, the eye stalk remained relatively unchanged so commonly used as a placement mark / tag on crab tagging activity. mangrove crab moulting had about 17 times until the age of one year. In the early stages of the soft shell crabs is a condition that is really weak and vulnerable to predators predators, so for the next few days the soft shell crab view of'll still get into the sediment / sludge while new skin expands and more hardened. Because it has become common knowledge that the software is very rare crab caught by fishing gear equipped with bait. In a few days later, soft shell crabs will be active, to escape from predators and even to actively search for food. in two to three weeks of the shell will harden and grow meat filling new larger shell. during that phase, soft shell crabs are very likely to be caught with traps and prone to damage shell.

 Why soft shell crabs when caught should be released back to the wild?

Soft shell crab meat only produces less than 20% of his body weight while hard crabs will yield 25%. catching crabs on the condition of the hard shell will maximize production for a certain amount of crab.
In addition, the quality of the crab meat soft shell crab is very low compared to a hard shell. Community Sector familiar with crab meat with meat so watery, mushy, not textured, even together like jelly so often just thrown away. by removing the soft shell crab back to the wild caught carefully, means it will provide an opportunity for the crab to harden and can be arrested at a later date after the maximum quality of the meat.

How to distinguish between soft shell crab with a hard shell crabs?

Soft shell crabs can be identified with the pinched / pressed gently crab body parts. soft shell crabs are marketed specifically for consumption is just crab molting or at least was only 4 hours since molting. in such a case, the soft shell crab was especially parts of the body.
In this case, the crabs have not been able to take the fight when bullied so in nature is very vulnerable to predators. different soft shell crabs that are produced for consumption, which is usually soft shell crab mixed with crab consumption is usually sold in the market condition is better. Shells and other body parts were hard so was able to escape and fight off predators disturbing. Identification of soft shell crabs like this is much more difficult because almost all parts of his body were hard but actually it is still very small and his body was still largely filled with water. To identify, then some of the massage can be done in several places such as in the first segment on the legs and feet on the chest area or crab. If parts are flexible, then the crab is still included soft shell crabs. In addition to these signs, the person who is experienced in handling a crab can tell when crabs that look lighter than the actual weight in general are usually white and soft shell crab net, while hard crabs usually darker, yellowish, brownish and often plastered with barnacles and algae.

How to mass produce soft shell crabs for consumption?

One of the properties owned crustascea in growth is molting or in scientific language known as molting. In changing conditions, leather crustaceans that had been replaced by a hard skin that can not be mencapit soft and easy to handle. Conditions software lasts only a short time, then gradually hardened like a crab as normal so we need strict control. These products have long known primarily for Calinectes sapidus blue crab caught from the wild, but since catching soft shell crabs from the wild availability is uncertain, it is then considered to be cultivated. Various methods have been made to accelerate the mangrove crab molting like stimulation through food manipulation, environmental manipulation and cutting techniques foot. Until now the technique of cutting the legs to break the crab claws and legs is still the most practical way that can be done to speed up the change of the skin and can be applied in bulk. By breaking the limbs of the crab, it will spur the growth hormone re-establishment of a lost limb. In this way, the young crabs to molt within 2-3 weeks depending on the foresight in choosing crab molting phase nearing. Because fans of soft shell crabs wide enough then the product is a mainstay of the crab-producing countries in the future. The price is quite tempting at around 3-5 USD depending on size. the larger the size the higher the price. But since the turn of the shells of crabs on the smaller size is usually faster, the development of soft shell crabs are usually geared for young crabs weighing 60-150 g / head.
Based on the nature of the crab molting above, since the 90s, the production of soft shell crabs have started to be developed in Indonesia. While it is economically cultured soft shell crabs look favorable, but the bulk of employers soft shell crabs could not last long. Various constraints faced especially the problem of seed market and availability of competing with consumption causes the price of seed in several development centers to be expensive. However, the improvement in seeding technique, then the mass is expected to come this is no longer an issue. While the marketing problem, the solution is expected to be formulated through the involvement of farmers and the government.
Production is carried out in several stages such as pond preparation, installation of the basket as the container that floated in the pond, stocking of the legs have been broken, feeding, and control / harvest.
Pond preparation to do as preparation for milkfish ponds for aquaculture farms produce a good environment. Basket can be used longan fruit basket that sealed the bamboo into 6 boxes to accommodate each one crab per box. In addition, the current commercially available special box for maintenance of soft shell crabs, but with a more expensive price. special boxes made of plastic is possible to perform a soft shell crabs maintenance without cutting the foot as it comes with a strong and special cover so the crab can not get out of the box maintenance. Baskets or plastic boxes are then assembled and floated in the pond. one hectare of pond can be filled up to 10,000 or 10,000 head crab box. after stocking, made in the form of trash fish feeding twice a day as much as 5-10% of the weight of the crab. controlling molting crabs do more intensive after the second week of maintenance when it is done cutting the legs or in the second when no deductions feet in anticipation of the molting crabs. If the crabs are molting left up to 4 hours, it will harden soft shell crabs slowly. Of 10,000 head were maintained by cutting the legs from the third week up to one month change of skin usually occurs about 10% per day or about 1000 tails or equivalent to about 100 kg per day. However, if no cuts foot, then usually a second month to a three-month maintenance period will be the soft shell crab as much as about 150 head or equal to 15 kg per day. Crabs are harvested usually be marketed alive or frozen. Based on the assessment of brackish water aquaculture Takalar hall against entrepreneur soft shell crabs in South Sulawesi show that the business is profitable with the R / C ratio of 1.94 for the scale (1000 tail and 2.24 for scales) 1,000.

so for lovers of environmental sustainability, the production of soft shell crabs from Indonesia resulting from cultivation, and 5% of the production is released back into nature

1 komentar:

Rudi said...

Friends,Brothers,Sisters & freeks..The Bunny & Bunnyiette from Belgium Wish you all a happy easter