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Sharing The Simplest – Most Complete Technique of Cobia Breeding

Cobia fish is a species with delicious meat quality, not only favored by the domestic market but also exported live to such as China, Hong Kong, etc. on many factors. The content of today’s article will help you know more about Cobia farming techniques commodity. Please take some time to read the article.

Preparing the pond

Where traffic and terrain are convenient, electricity is available, and the bottom is sandy or muddy. The best cobia ponds are in brackish tidal areas, inside and outside the dyke, salinity from 5-25‰, with active water supply.

Goby ponds need to be built according to an area suitable for the number of fingerlings
Goby ponds need to be built according to an area suitable for the number of fingerlings

Ponds with an area of ​​500 – 5,000 m2 are suitable, square and rectangular in shape. The depth of the pond is from 1.2 to 1.5 m. The bottom can be designed with a ditch of 1.5 – 2 m wide, 30-40 cm deep. The pond has a separate water supply and drainage system. The pond bottom is flat, slightly inclined towards the drain. Ponds can be arranged with 1-2 fans, in opposite positions.

The pond bank is firm and does not leak, if the leaky bank can be overcome by digging a trench in the middle of the bank, the depth of the trench is 50 cm lower than the depth of the pond bottom, the trench is lined with nylon tarpaulin, and the middle is filled with sand. For areas that are difficult to retain water, the bottom of the pond should be lined with canvas, then poured with a layer of sand about 15-20 cm thick.

Goby ponds need to have backup ponds in case when the environment changes or when fish get sick, they need to switch to a backup pond to treat fish and disinfect, and renovate the old pond.

About 2 weeks before stocking, it is necessary to drain the water, fill all holes at the foot of the bank and shore, and clean weeds. Ponds are dredged to remove bottom mud, repair pond banks, pond culverts. Use a tarpaulin around the pond to avoid fish burrowing across the shore. Plowing and harrowing, flattening the pond bottom. Apply lime with a dosage of 5-7 kg / 100 m2, dry the bottom for 3-5 days, then soak in water for 2-3 days and then pump out the water. Take water into the pond until it reaches 1.2 m, after 3 days all trash fish eggs have hatched, destroy impurities with saponins, dosage 5-10 kg/1,000 m2, then remove dead fish from the pond. .

Make water color in the pond by applying 3-5 kg ​​of urea and 5-7 kg of phosphorus/1,000 m2. When the pond is light green or yellow-brown, the clarity reaches 40-50 cm, then stocking is carried out. The suitable pond environment when stocking fish is pH 7.5 – 8.5; salinity 10 – 15‰, water depth 1.2 – 1.5 m.

Select and breed

Choose a healthy breed, no deformity, no signs of disease, flexible swimming, quick reflexes; have uniform size, seed size is about 6-8 cm, stocking density is 10-12 fish/m2 depending on investment and care conditions. The time for stocking the first crop is around March and April; season 2 in July to August of the year. Before stocking fish with fresh water or formaline, concentration of 20 ppm for 10-15 minutes. During the bathing process, it is necessary to observe and provide enough oxygen, if the fish shows signs of shock, it is necessary to reduce the drug concentration or shorten the time of bathing the fish. Release fish in the early morning or cool afternoon.

Goby fish when choosing seed should choose the same size, not deformed
Goby fish when choosing seed should choose the same size, not deformed

Care and management

Use sinking pellets, specialized for brackish and saltwater fish farming with protein content over 40%, lipid content 10%, size 1 – 1.5 mm, do not use poor quality feed, feed moldy food. Feed fish twice a day at 7-8 am and 17-18 pm, with a diet of 10-15% of body weight, then gradually reduce until near harvest to 2-2.5% of body weight. .

Use a plastic or bamboo or wooden frame feeder to feed the fish. Feed the fish twice a day. On days when the water temperature is below 200C or above 370C reduce the amount of food or feed the fish. It is necessary to observe the fish’s ability to catch prey and the amount of leftover food in the feeding tray to adjust the amount of food most appropriate.

Periodically change the water twice a month, each time from 10-20% of the pond water. Periodically use probiotics or probiotics to treat the pond water environment.

From the second month of culture, it is necessary to fan or aerate to increase dissolved oxygen content. The fan time is about 5-8 hours/day at about 11pm to 5am the next morning. On days when the weather changes, irregularities or periods of prolonged heat, it is necessary to increase the running time of the fan.

Periodically add Vitamin C, multivitamins, digestive enzymes to the feed to enhance resistance and shock resistance for farmed fish, especially at the time before the change of season or before the heat wave.

Farmers need to regularly check the growth rate of cobia to adjust the nutrition accordingly.
Farmers need to regularly check the growth rate of cobia to adjust the nutrition accordingly.

Check the growth rate and disease situation of fish to adjust the appropriate amount of feed and take timely measures to treat the disease.

After 6 months, the fish reach commercial size can proceed to pruning or whole collection.

Some common diseases

Seal disease (sores)

The disease usually occurs in the months of autumn, early winter and late spring and summer. On the body of the fish appear round ulcers with red border or white border around. Diseased fish are poorly fed and spread very quickly, especially in contaminated ponds and high stocking density.

Disease prevention: Periodically change the water for fish. If using raw food, it should be disinfected with potassium permanganate to avoid fish infection through food. Use pureed garlic to mix with food plus binders such as flour, tapioca flour, etc. to feed, use 200 g of garlic for 100 kg of fish to use continuously for 3 days. Use Tien Dac 1 monthly with a dosage of 25 g/100 kg of fish/day. Mix into fish feed continuously for 3 days.

Treatment of diseases: Slapping the pond, removing fish that have been infected with sores. In addition, disinfect the bottom of the pond, then bathe with potassium permanganate at an amount of 30 g/m3 for 5-7 minutes.

Use Tien Dac 1 at a dose of 50 g/100 kg of fish/day. Mix into fish feed continuously for 1 week

Sickness

The disease appears in the summer when the weather fluctuates abnormally, the fish suffers from a large belly, poor swimming, and loss of balance. The way to prevent and treat the disease is similar to that of canker sores, or you can use the antibiotic Flumequin according to the manufacturer’s instructions.

Flatulence often occurs in cobia in the summer
Flatulence often occurs in cobia in the summer

Chickenpox disease

The disease appears year-round on the fish body, white spots appear and blisters appear. The disease can go away on its own when the environment changes. The cause of the disease is due to the harsh environment such as prolonged rain or sunshine.

Prevention: Conduct periodic water changes, well manage water quality and color in ponds, especially when there are fluctuations in environmental factors.

Treatment of diseases: Change the water for the pond with more than 50% of the fish will recover on their own.

Fish lice disease

When sick on the body of fish, lice appear on the skin to absorb nutrients, making the fish grow slowly, or the parasite anchors in the mouth, gills, and blood-sucking regional tissues, causing the fish to grow slowly.

Treatment: Use Diprex to spray into the pond at a dose of 200-400 g/1,000 m3, after 3 days of repeating and the anchor worms will all die.

Above is information related to cobia farming techniques that we would like to share with you. Hopefully the content of this article will help you gain more experience to implement your own cobia farming model.

Emilia Chaney
Emilia Chaneyhttps://agrisearch.net
My name is Emilia Chaney. I'm a social girl from Romania with a big smile and 3 passions: Agriculture, Travel and Social Media. I try to make this blog practical, full of great advice and inspiring ideas.

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