The Way of Grouper Fishing
When grouper farming is being developed and promoted as a superior for marine aquaculture commodities exported by selling value is quite high.
In order to support the development of grouper cultivation, it is necessary to solve common problems in grouper farming is slow growth.
Hybridization is one effort to overcome the problem. With this hybridization method can produce superior seeds on genetic and morphological properties.
Tiger grouper includes high valuable groupikan.Kenis kerapu grouper is a native Indonesian fish that live scattered in various rocky waters of the archipelago. In addition to Indonesia, the spread of tiger grouper areas includes waters in the Indo-Pacific region.
Systematics
Family: Serranidae
Species: Epinephelus fuscoguttatus trade name brown marble grouper, cod flower, cod rock spots, carpet cod, aka madaharata, lo fu pan
Local Name: Garopa
Characteristics of Crii and Biological Aspects
- Physical characteristics
The shape of the tip of the caudal fin, the chest, and the anal fin of the fish in the form of a bow. The head and body are gray or pale greenish-brown. The body is full of dark reddish spots of orange or dark brown. Spots in the middle are darker than at the edges. Spot size becomes smaller towards the mouth. Dorsal back and base of large black spots.
- Growth
In nature, tiger grouper Total length 95 cm can reach and weight of 11 kg.
Selection of Livestock
This fish can live and grow with water salinity 22-32 ppt. Therefore, the location of the cultivation is chosen according to the criteria. The location of the cultivation should also be protected from large waves of sea water and strong winds. In addition, major changes in salinity and runoff in cultivation areas should be avoided.
Container Cultivation
Enlargement of tiger grouper fish can be done in floating net cages, as well as other types of grouper fish. Size Rafts and cages are used in accordance with the needs of production targets and the size of fish to be cultivated. The raft frame used should be 5 x 5 M with mesh size of 2 m X 2 M.
Cultivation Management
Provision of seeds
Seed should be from selected before cultivation filled enlargement. The abnormal seed (deformity) is relatively weak and susceptible to disease. In addition, fish tend to show slow growth.
Spread the Seed
Fish weighing 5-10 grams spread as much as 75-100 tail / M3 for the size of 10-50 gr seeds can be stocked as much as 40-50 tail / M3. Feed given garbage or pellet. If you want to do with the cultivation of grouper feed pellets, it is important to seed with pellets during the nursery period.
To boost immunity and reduce fish stress, it is advisable to add vitamin C into the pellet. Tiger grouper is a type of predatory fish. Therefore, fish cultivation requires fresh fish waste or high protein pellets.
The food the grouper eats is swallowed 95% after 36 hours in the stomach so that the feeding is done every day. At the time of stress, this fish will spew feed.
Pest and disease control
Tiger grouper cultivated in the cage is often defective in the gill cover, mouth, and neck unknown cause is not clear. A common characteristic of the onset of illness is the loss of appetite fish.
The observation conditions are essential for detecting the feed of fish on the fish. When health conditions change bad Groupers usually often swim in the water because swim bubbles swell. If there is any type of fish, observation to determine the cause should be done immediately. seed levels are often attacked by VNN.
Symptoms include discoloration darker, slow swimming, and spinning. VNN attacks have a major effect on the growth rate of seeds. To avoid the attack of this disease, the eggs used must be free from VNN. parasitic worms that infect the skin is easy to farm the groupers. To suppress the effects of parasites on fish,
You should do the fish soak in fresh water (5 minutes) and change the net every 2-4 weeks. Meanwhile, parasites, such as gill worms, can be cleaned by soaking fish in high salinity water (ppt for 156o minutes).
Harvest
The tiger grouper can be harvested after 5 months of 600 grams / head. Generally, size is obtained after 6-8 months of maintenance. The harvesting system can be either total or selective depending on need. The same way as the fish harvest the plants inside the cage.
Good luck and hopefully this post can be useful for all friends.
