Most of them move and feed at night, and dive into the water or caves during the day. After artificial breeding, they can also eat during the day and eat some plant concentrate.
The pond fish has strong adaptability, can grow in small water body and low dissolved oxygen environment, has fewer diseases, wide feed sources, is easy to breed, and has low cost, so it is suitable for farming and popularization in small water surface in farm courtyards.
The pond fish is a wild fish, which lives in the lower reaches of rivers, fields, pits and ditches. It mainly lives in the middle and lower layers of rivers, lakes, reservoirs and pits, mostly in coastal areas, hiding in grass, rocks or deep water during the day, and foraging frequently at night;
Extended data:
After autumn, pond fish live in deep-water live sludge for the winter, and their feeding degree is also weakened. Most carnivorous fish prey on small fish, such as rice strips, crucian carp, goby fish, wheat ear fish, carp, loach, etc., and also eat shrimp and aquatic insects, mainly by swallowing. The main function of teeth is to prevent food from escaping.
Tangren is distributed in Mesopotamia Plain, Nile Valley, Indus Valley, the middle and lower reaches of the Yellow River-Yangtze River, etc., and is widely distributed in southern China.
Silurus meridionalis is an omnivorous fish, which feeds mainly on animal food. Its daily food intake is 5-8% of its own weight, and the maximum food intake can reach more than 15%. If it is fed too much, it will cause the phenomenon of overeating and dying.
Silurus meridionalis has strong hunger tolerance. During artificial overwintering, fingerlings or parent fish will not die if they are not fed for 4-5 months. When the water temperature rises above 15℃, they begin to feed normally, and the temperature is 20-35℃.
Generally, May to September is the peak feeding period, when the growth rate is the fastest. In natural water, fry mainly feed on rotifers, Daphnia, octopoda, cladocera, copepods and so on. 4 ~ 7 days after feeding, the nutrition is obtained entirely by predation.
Baidu Encyclopedia-Tangren