Fish discussion
Silver carp and bighead carp are not a kind of fish, but a combination of silver carp and bighead carp.
Among them, silver carp is a large freshwater fish, chordates, bony fishes, CYPRINIDAE, CYPRINIDAE, silver carp, commonly known as silver carp, silver carp.
Bighead carp is a large freshwater fish in the animal kingdom, chordates, teleost, CYPRINIDAE and bighead carp, commonly known as silver carp, silver carp and silver carp.
living environment
Silver carp and bighead carp are pelagic fish, which often live in the upper and middle layers of rivers, bends, lakes and reservoirs. Young fish and mature individuals generally grow in lakes and attached water bodies along the river, and swim to the river to lay eggs after sexual maturity. After spawning, most individuals enter lakes along the river for food and fattening. In winter, the water level of the lake drops, and it returns to the deep water area of the river for wintering, and then returns to breed in the warm spring of the following year.
eating habits
Silver carp and bighead carp are filter-feeding fish. They feed on plankton from juvenile to adult fish. They filter zooplankton, such as rotifers, cladocera, copepods and phytoplankton, such as diatoms, cyanobacteria and cryptoalgae, from water through the special structure of gills. They are very interested in sour food and like bad food. When artificially raised, livestock manure, bean curd residue, skin, rice bran and particles can be used for feeding.
Feeding rule
The blue crab is a warm-water fish, and it likes to live in the water with high water temperature. The optimum survival water temperature is 23 ~ 32℃. In this water temperature range, the feeding enthusiasm is directly proportional to the water temperature, especially in hot summer. When the water temperature is lower than 23℃ or higher than 32℃, the enthusiasm for feeding gradually decreases, and the critical water temperature for feeding is about 8 ~ 40℃.
Chain fish/morphological comparison/
1. Body color: Silver carp and bighead carp are different in body color, in which silver carp's back is gray, its abdomen is silvery white, and the reservoir is grayish white; The bighead carp has dark brown back, light black spots on its body, gray abdomen and light gray reservoir.
2. Head: The head sizes of silver carp and bighead carp are different, and the head length of silver carp accounts for about 1/4~ 1/5 of the total length of the fish, which protrudes forward from the bottom; The head of bighead carp is bigger than that of silver carp, accounting for 1/3 of the total length of the fish, and it protrudes forward in the world.
3. Abdomen: The abdomen shapes of silver carp and bighead carp are different, and the abdomen of silver carp has a "rib" obviously similar to the blade; The abdomen of bighead carp is very smooth and round, and there is no obvious "edge", which is the most obvious difference between the two.
4. Pectoral fin: The parts of silver carp and bighead carp are different in size, and the pectoral fin of silver carp is relatively large, obviously exceeding the base of ventral fin. The pectoral fin of bighead carp is relatively small, and the tip only reaches the base of ventral fin, which can be used to identify other young fish with inconspicuous characteristics.