Ding tuna, also known as European ding tuna, Ding Gui fish, Ding Gui fish, Ding Gui fish, Ding Gui fish, Ding Gui fish, Ding Ting is a broad temperature freshwater, benthic fish, usually living in slow fresh water, especially in lakes and rivers downstream, commonly found in clay and mud as the base, plant-rich calm waters, rarely seen in rocky and clear waters, and in fast-moving streams can not be found at all. Ding tuna has a wide range of food, slow feeding, easy to domesticate, Ding tuna is an omnivorous fish, more than night foraging, in the country is not common, few fishing friends will be the object of fish fishing, mostly farmed fish appear.
Chinese scientific name Ding Gong (丁鱥) hanyu Pinyin dīng guì
Distribution area: Irtysh River and Ulungu River Basin in Xinjiang Omnivorous breeding period is from April to September Bottom of the active water layer
Suitable fishing temperature 20 °C ~ 28 °C Also known as European ding tuna, ding gui fish, Ding Gui fish, whiskers and other appearance characteristics
It can reach up to 70 cm long and is mostly small, with smaller eyes and orange-red. The dissociative shape is inconspicuous , except that the abdomen of the female is more convex than the male. The outer spoke ribs of the male's ventral fin also appear to be thicker and flatter.
The body is slightly taller , the chestnut is rounded , and the sides are flattened. It is generally olive-green , with a bluish-black dorsal side , a deeper dorsal surface , a nearly golden yellow abdomen , and a rounder without skin edges. The caudal fins of the body are not forked , while the other fins are rounded , with most of each fin gray-black and iridescent golden.
The mouth of the tuna is quite narrow, the mouth fissure is slightly inclined upwards, there is a pair of short whiskers at the corner of the mouth, 1 row of pharyngeal teeth, there is a groove in the center of the tooth surface, and the tooth end is slightly grooved. There is a small tentacle at each corner of the chew. The body is covered with small round scales, thin scales, tightly arranged, hidden deep under the thick skin, making it smooth like an eel. The lateral lines are complete, the upper part is darker in color and the lower part is lighter. The snout has a pair of extremely short lip whiskers, the dorsal fin is short, the fins are free of hard spines, and its starting point is after the beginning of the ventral fin. The thorax and ventral fins are fan-shaped, and the caudal fins are flattened or slightly concave.
1. Life habits
It usually lives in the slow flow of fresh water, especially in lakes and rivers, prefers to inhabit the still water of the silt bottom of the aquatic grass, has a strong adaptability to changes in oxygen content in the water, and prefers to live in fish ponds, mountain ponds, reservoirs, rivers, lakes and other waters such as fish ponds, mountain ponds, reservoirs, rivers and lakes in aquatic grasses. The skin has a respiratory function, strong hardiness, often nocturnal activity, in the winter in the north can drill into the mud bottom to overwinter, can bury the body in the mud to sleep.
It is a broadly temperate freshwater, benthic fish, commonly found in calm waters rich in plants based on clay and mud, rarely found in rocky and clear waters, and can not be found in fast-moving streams. Resistant to low dissolved oxygen, tolerant of water with low oxygen content and even waters where carp cannot survive. It can survive in 0 °C ~ 40 °C water, and the growth temperature is 20 °C ~ 28 °C is the best. The pH is 7 to 10.
2. The feeding habits of Ding Tuna
Ding tuna has a wide range of feeding habits, eats slowly, and is easy to domesticate. It is an omnivorous fish that feeds more than at night, uprooting and eating algae and invertebrates on the bottom of the water. It prefers aquatic plankton, benthic organisms and plant detritus, feeds on spoiled plant residues and aquatic insect larvae, and also prefers artificial feeds such as soybean cake, fish meal and rapeseed cake (meal). Food competition between carp and silver carp is fierce, and the contradiction with grass carp is low.
Zooplankton are the most important food species of the 1-year-old ding tuna, with small branches dominating the terrestris. When the body length is more than 5 cm, the tuna mainly feeds on copepods, rotifers, benthic animals such as rocking mosquito larvae, water mollusks, etc. As body length increases, the proportion of artificial compound feed in the diet of ding tuna will increase. Zooplankton and benthic animals are the main food of the 2-year-old Ding Ting, and captive breeding can be fed a variety of compound feeds. The 3-year-old ding tuna prefers granular food.
3. Distribution range
It is widely distributed in the major inland rivers and lakes of Europe, mostly in the Czech Republic, Hungary and Spain, and gradually expands to Central Asia and Northwest Asia due to its strong adaptability. In China, it is only found in the Irtysh and Ulungu river basins of Xinjiang.
4. Skills of fishing for ding tuna
Large tuna can be found in pebble pits or mud bottoms, in deep water areas where plants are lush and slow-flowing. They accept a variety of baits, but eat slowly and are difficult to hook. When catching fish weighing more than 1 kilogram (2.2 pounds) with a fishing rod, it takes a lot of effort to wrestle with it.