The living habits of herring

Black carp is also called black carp, green mixed, screw green, black carp, etc. It has strong adaptability and is easy to raise. It is an important fishery resource in the middle and lower reaches of the Yangtze River and lakes along the Yangtze River. It is the main breeding object in lakes and ponds. It is one of the "four major domestic fish" in freshwater culture in China.

The habit of herring is inactive, usually inhabits in the middle and lower layers of water, food to snails, clams, clams, etc. mainly, but also predation shrimp and insect larvae. In the fry stage, it mainly feeds on zooplankton. Black carp grow rapidly, individual larger, adult fish the largest individual up to 70 kg.

Black carp mostly concentrate on feeding and fattening in river bends and lakes with abundant food, and overwinter in deep water. Strong action is not easy to catch. The oxygen consumption was similar to that of grass carp. When the dissolved oxygen in water was lower than 1.6 mg/L, respiration was inhibited, and when it was as low as 0.6 mg/L, it began to suffocate and die. It can survive in the water temperature range of 0.5~40℃.

The optimum temperature for reproduction and growth of black carp is 22~28℃. Likes slightly alkaline thin water quality. It mainly feeds on shellfish such as snails, clams and young mussels, and eats a small amount of aquatic insects and arthropods. Daily food intake is usually about 40% of body weight, and can reach 60~70% when environmental conditions are suitable. When larvae are 7~9 mm long, they enter mixed vegetative stage, at this time, they continue to use their own yolk and begin to feed on rotifer and nauplius larvae; when they are 10~12 mm long, they feed on cladocera, copepods and chiromid larvae; when they are about 30 mm long, their feeding habits gradually differentiate and they begin to feed on small snails.