What do you nest wild crucian carp in March?

In March, wild crucian carp dug holes with fine powder of coarse grains such as bean cake, wheat bran and distiller's grains.

Brief introduction of crucian carp

Carassius auratus belongs to Carassius auratus of CYPRINIDAE, with a body length of 46.9-255 mm, an oval body, a flat side, the highest body at the starting point of dorsal fin, a narrow belly edge and no skin edge; The eyes are in the middle position and the tail edge is closer to the snout.

The space between the eyes is wide and convex. The anterior nostril and the posterior nostril are adjacent and located slightly in front of the eyes. The mouth is tilted forward, and the mandible is slightly shorter than the maxilla. Lips are developed. No need. The branchial foramen is large, outward, and the lower end reaches below the angle of the anterior branchial operculum. The gill cover is connected with the branchial isthmus. Branches and rakes are developed, with many small protrusions; Experts are wide and short.

The screw is divided into two chambers. The anus is located slightly in front of the starting point of the anal fin. The dorsal fin begins slightly in front of the center of the body; The gluteal fin is short, starting from the bottom of the 6th-7th dorsal fin. Finally, the spines are like dorsal fin spines; Low pectoral fin side; The ventral fin begins slightly in front of the dorsal storage starting point; Shaped like a pectoral fin; Except for a few small fish, none of them reached the anus.

The caudal fin is deep and shaped, and the fork is blunt and round. Crucian carp is a warm-water fish. Carassius auratus likes to move underwater. Crucian carp has strong adaptability to hypoxia and is an omnivorous fish. The feeding habits of young fish are similar to those of adult fish.

Adult crucian carp mainly eat organic debris, aquatic plants and plant seeds, as well as a considerable number of chironomid larvae, cladocera and copepods, as well as commercial feed. Crucian carp is a kind of fish that lays eggs repeatedly.

Carassius auratus is distributed in all major rivers and lakes in China except Qinghai and Tibet. Introduced to North America, Europe, Africa, India, South Korea and Japan.

Carassius auratus is 1758, which was first recorded by Linnai, a Swedish botanist in Europe, in the edition of "System a Natural"10, with the scientific name of Carassius auratus. Literature of crucian carp in China and Hongkong.

Albert William Christian Theodore Herre (1868- 1962), an American lichenist and ichthyologist, was recorded in the third volume of the supplement of Hong Kong Naturalist magazine in 193 1 for the first time.

Later, China ichthyologist Lin Shuyan described the distribution and irrigation channels of wild individuals in the lower reaches of Xinjie River in Hong Kong, China in Volume 2 of Journal of Hong Kong Fisheries Research Station 1949.