Chinese dragonflies

species of ,of the genus of the
, the genus of the dragonfly, is named because the origin of the model is China. Also known as the

,


a large raso. General fish body length 2.42


3.25 (


♀

)




1.69


to

2.5 (
♂

)


meters, weight

148.5


to

378
(♀) or
38.5 br to br to 189 br />

(♂) kg ,the maximum weight of 500kg or more. Body length, shuttle-shaped. Kiss tip long

,


kiss in the middle of the abdomen

2


pair. Tail crooked shape, the upper leaf is particularly developed, body

5


vertical bone plate-like large hard scales. The lid membrane is connected to the gorge and separates the left and right pores. The skin of the young fish is smooth. The skin of the fish is rough, the column-like, 13 to 28


. Generally the head and body back side cyan-grey or brown, abdominal white, each fin is cyan-grey, side, abdominal plate between the side plate below the body color transition area.





It is distributed in the Pacific Northwest and east of Hainan Island in China to the Yellow Bohai Sea and other freshwater rivers such as the Pearl River, Qiantang River, Yangtze River and Yellow River.






live in the great rivers and offshore, is the bottom fish of the return. From the sea into the river, happy to gather in the estuary. Mature groups in late spring

10


to 11 and then up the river, in the upper reaches of the river for reproduction. The spawning field of the Yangtze River basin is in the deep pond and the lower reaches of the Jinsha River above Chongqing in the upper reaches of Chongqing. Age of sexual maturity

9 19


age


♂ ♂

)


16


to 25


(♀). The amount of eggs

47.5




144.5


million. Egg-heavy, oval,


gray-green, sticky. Fertilized eggs hatched


18 degrees Celsius at 5 to 6
days. Faster growth, average annual weight gain

8 to 13


(♀) or

4.6


to 8.6


(♂) kg. Animal-based food, such as rocking mosquito larvae, larvae and other aquatic insects, moligos, oligocarpies, small fish and algae. The spawning period generally stops eating.






as an important large-scale economic fish, Sichuan fishermen have "kilograms of lazi, thousands of pounds of elephant" proverb. The hometown of the Chinese dragonfly is China, so it has some academic and scientific value, and in recent years the yield has decreased significantly, has been listed as an endangered species, so we must do a good job of protecting and artificial breeding the Chinese dragonfly.