The southern bigmouth owl, commonly known as Heluo, is mainly produced in the rivers of the Yangtze River. It is a large-scale economic fish that mainly eats fish. Its common weight is about 2 to 5 kilograms and its maximum weight is 30 kilograms or more. The big oysters have a high percentage of meat, rich in protein and vitamins, and are tender and delicious. It also has a fast growth (up to 2.7-3.5 kg in the first year under the conditions of pond rearing), a short breeding period (5-6 months when the seedlings are raised can become commercial fish), and strong ability to adapt to low temperature (both North and South China) Natural wintering in the wild) Wide adaptability (fish ponds, rice fields, reservoirs, ponds and other large and small water surfaces can be cultured), food habits (various live animals, scraps, and pellet feeds can be fed), good marketability (market The sales price ranks first among all kinds of squid, and has the potential for foreign exchange earnings from export, and the economic benefits are high (per 667 square meters, ie, 1 mu profit is 5 to 6 times more than conventional breeding species).
The bigmouth gull is a bream with a broad flat head and a short thoraco-abdominal tail. It has long tails, small eyes, large mouths, sharp and fine teeth, and 2 pairs of long and short beards. The dorsal fins are short and have no hard thorns. Smooth jagged nicks, body length without scales, very mucous, short bowel, stomach.
The bigmouth gull is a temperate fish, and its survival temperature is 0-38°C, so it can naturally overwinter in the north and south of China. The best growing water temperature in the pond raising condition is 25-30°C, when the water temperature dissolves oxygen at 3mg/kg. When it rises above, the growth is normal, and when it is less than 2 mg/L, a floating head appears. The pH range is 6.0-9.0, and the optimum range is 7.0-8.4. When the pH is low, it will have an impact on the culture. You can use lime to adjust the water quality. The method is to spray lime water once every 15-20 days, each dosage is 10 kg/667 square meters. The large mouth scent is more gentle and unsuitable for jumping. It is easier for them to catch fish. They like to inhabit open-water bodies, and live in benthic habitats. They often have activities in the pool at the bottom of the pool.
The bigmouth gull is a bream with a broad flat head and a short thoraco-abdominal tail. It has long tails, small eyes, large mouths, sharp and fine teeth, and 2 pairs of long and short beards. The dorsal fins are short and have no hard thorns. Smooth jagged nicks, body length without scales, very mucous, short bowel, stomach.
The bigmouth gull is a temperate fish, and its survival temperature is 0-38°C, so it can naturally overwinter in the north and south of China. The best growing water temperature in the pond raising condition is 25-30°C, when the water temperature dissolves oxygen at 3mg/kg. When it rises above, the growth is normal, and when it is less than 2 mg/L, a floating head appears. The pH range is 6.0-9.0, and the optimum range is 7.0-8.4. When the pH is low, it will have an impact on the culture. You can use lime to adjust the water quality. The method is to spray lime water once every 15-20 days, each dosage is 10 kg/667 square meters. The large mouth scent is more gentle and unsuitable for jumping. It is easier for them to catch fish. They like to inhabit open-water bodies, and live in benthic habitats. They often have activities in the pool at the bottom of the pool.