Tiger sharks are native to the rivers and lakes of Thailand and Malaysia, and are the main farmed fish of Southeast Asian countries. They are also popular fishing targets. Tiger sharks are of good flesh quality, fast growth, large body size, mixed food, low oxygen tolerance, and easy fishing. One year natural growth can reach 1000g-2000g, artificial breeding up to 3000g-5000g. It is a breed with high economic value and promising development.
First, biological characteristics
Tiger sharks are divided into blue shark and red shark by body color. It has a long body, a wide front anatomy, a slightly slender body behind the body, no scales on the body surface, head oblong, kiss round blunt. There is a fat fin before the dorsal peduncle of the dorsal fin, and the caudal fin bifurcate deeper. Tigerhead sharks like to cluster, inhabit the middle and lower layers of water, lively and lively, often floating surface activities. Its septum is separated by a large number of vesicular-like respiratory chambers. It is an important respiratory organ that can absorb oxygen in the air and is more convenient for the survival and transportation of fish species and commercial fish. It is highly tolerant to hypoxia, and tiger sharks can still live normally when the carps in the same body of water are severely floating. However, its tolerance to low temperature is weak, and the suitable water temperature for growth is 20°C-30°C. When the water temperature drops to 14°C-18°C, the activity will be reduced or even stop breathing. When the water temperature is 12°C-13°C, shock will occur. death.
The fish is omnivorous and contains a variety of rotten animals and plant debris in the staple water. Under the conditions of artificial breeding, fish meal, bean cake, oysters, corn flour, wheat bran and other mixed feeds and various food wastes are eaten.
Second, adult fish breeding
After several years of introduction and breeding, tiger sharks have been successfully bred in Guangdong, Fujian and other places in South China. Adult fish farming is still in its infancy. According to foreign farming experience, tiger shark breeding is similar to freshwater whitefish breeding methods. The owner has both single- and multi-cultural methods, which can be cultured in ponds, and can also be factory-intensively intensively cultured and cage-raised based on its advantages of rapid growth and low oxygen consumption. It can be cultivated year-round in places where geothermal conditions are hot.
For single tigerhead sharks, ponds with an area of ​​2000m2 to 3000m2 and a water depth of 1.5m to 2m can be selected. Generally, 3cm to 4cm fish species are planted at a length of 2000 to 3000 tails per acre. Each month, the main feed was high protein concentrates such as rotifers, soft-shelled turtles, and oysters, and later it was changed to artificial compound feeds containing 27% crude protein. Can also be used water hyacinth, cabbage paste into pulp and then mix the broken corn, bean residue with feeding. Up to 750g in 3-4 months.
In polyculture, a tiger shark shark (100 heads/mu) can be used in a pond for raising oysters, grasses, and tilapia, which does not affect the yield of the main fish, and it can also increase the tiger head sharks from 70 kg to 100 kg.
Third, fish disease prevention
Gill fin disease: Symptoms are fish's caudal fins, dorsal fin congestion and ulceration. The cause of the disease is bacterial infection. Diseased fish do not eat and die in large numbers. It is a serious infectious disease in the stage of seedlings. Control method is to disinfect the pool water, available 15 mg / L formaldehyde or 10 mg / elevated potassium manganate or 10-20 mg / liter bleaching medicated bath. It is also possible to add antibiotics to the mixed feed. Each thousand fish species is treated with 30-40 pieces of earth toxin per day for one week, and the diseased fish can be cured.
Small melon worm disease: When the water temperature is between 20°C and 24°C, it is easy to develop the disease. The disease is a white spot on the body surface. In severe cases, it will produce pus and the fish will lose weight. Treatment method can be used 0.1-0.15 mg / l mercury nitrate Quanchiposa, repeated 3-4 days, small melon insects will automatically fall off.
First, biological characteristics
Tiger sharks are divided into blue shark and red shark by body color. It has a long body, a wide front anatomy, a slightly slender body behind the body, no scales on the body surface, head oblong, kiss round blunt. There is a fat fin before the dorsal peduncle of the dorsal fin, and the caudal fin bifurcate deeper. Tigerhead sharks like to cluster, inhabit the middle and lower layers of water, lively and lively, often floating surface activities. Its septum is separated by a large number of vesicular-like respiratory chambers. It is an important respiratory organ that can absorb oxygen in the air and is more convenient for the survival and transportation of fish species and commercial fish. It is highly tolerant to hypoxia, and tiger sharks can still live normally when the carps in the same body of water are severely floating. However, its tolerance to low temperature is weak, and the suitable water temperature for growth is 20°C-30°C. When the water temperature drops to 14°C-18°C, the activity will be reduced or even stop breathing. When the water temperature is 12°C-13°C, shock will occur. death.
The fish is omnivorous and contains a variety of rotten animals and plant debris in the staple water. Under the conditions of artificial breeding, fish meal, bean cake, oysters, corn flour, wheat bran and other mixed feeds and various food wastes are eaten.
Second, adult fish breeding
After several years of introduction and breeding, tiger sharks have been successfully bred in Guangdong, Fujian and other places in South China. Adult fish farming is still in its infancy. According to foreign farming experience, tiger shark breeding is similar to freshwater whitefish breeding methods. The owner has both single- and multi-cultural methods, which can be cultured in ponds, and can also be factory-intensively intensively cultured and cage-raised based on its advantages of rapid growth and low oxygen consumption. It can be cultivated year-round in places where geothermal conditions are hot.
For single tigerhead sharks, ponds with an area of ​​2000m2 to 3000m2 and a water depth of 1.5m to 2m can be selected. Generally, 3cm to 4cm fish species are planted at a length of 2000 to 3000 tails per acre. Each month, the main feed was high protein concentrates such as rotifers, soft-shelled turtles, and oysters, and later it was changed to artificial compound feeds containing 27% crude protein. Can also be used water hyacinth, cabbage paste into pulp and then mix the broken corn, bean residue with feeding. Up to 750g in 3-4 months.
In polyculture, a tiger shark shark (100 heads/mu) can be used in a pond for raising oysters, grasses, and tilapia, which does not affect the yield of the main fish, and it can also increase the tiger head sharks from 70 kg to 100 kg.
Third, fish disease prevention
Gill fin disease: Symptoms are fish's caudal fins, dorsal fin congestion and ulceration. The cause of the disease is bacterial infection. Diseased fish do not eat and die in large numbers. It is a serious infectious disease in the stage of seedlings. Control method is to disinfect the pool water, available 15 mg / L formaldehyde or 10 mg / elevated potassium manganate or 10-20 mg / liter bleaching medicated bath. It is also possible to add antibiotics to the mixed feed. Each thousand fish species is treated with 30-40 pieces of earth toxin per day for one week, and the diseased fish can be cured.
Small melon worm disease: When the water temperature is between 20°C and 24°C, it is easy to develop the disease. The disease is a white spot on the body surface. In severe cases, it will produce pus and the fish will lose weight. Treatment method can be used 0.1-0.15 mg / l mercury nitrate Quanchiposa, repeated 3-4 days, small melon insects will automatically fall off.
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