CATDOLL : CATDOLL: Is the red fish from Yancheng?

Hello!

Red fish is not from Yancheng

Red snapper

Open categories: fish, fish, biology, animals, Cypriniformes

Myxocyprinus asiaticus belongs to the order Cypriniformes, family Myxocyprinus, genus Myxocyprinus.

Common names: roasted bream, yellow bream, wooden leaf plate, red fish, purple bream, sparrow fish, blood bream, and pink bream.

Latin Species Name: Myxocyprinus asiaticus (Bleeker)

English name: Chinese sucker

Distribution: Yangtze River, Jinsha River and other places.

Habitat: Lives in lakes and rivers. Juveniles and adults have different shapes, habitats and biological learning characteristics. Juveniles like to gather among gravels in slow-flowing water and mostly move in the upper layer of the water. Subadults are in the middle and lower layers, and adults like to be in open water areas of rivers. They move quickly and agilely.

Predation and Food: Mainly feeds on invertebrates and insect larvae, but also eats organic matter on the bottom of the water, and often sucks diatoms and plant fragments attached to the gravel on the bottom of the water.

Identification characteristics and habits: The body is tall and flattened, in a rhombus shape, with a pointed and short head, a small mouth, and thick lips that turn outward like a sucker. The dorsal fin is tall and long. There is a wide longitudinal stripe of carmine red on the middle axis of the adult body. The male fish is brightly colored, while the female fish is dull. Female fish generally breed in rapids and shallows with fresh water, high oxygen content, and relatively stable water level and temperature, and lay eggs in March-April. The eggs are light yellow and sticky, adhering to gravel or algae at the bottom of the water. The fry can be hatched in 7-8 days at a suitable water temperature of 16-18℃. The mullet has the characteristics of large size, fast growth, thick meat, and delicious taste. The fish is docile, has strong vitality, and has a wide range of food habits. It is an ideal object in the aquaculture industry, and the juveniles are very good ornamental fish.

Endangered level: Vulnerable. China's national Class II protected wild animal.

The body of the mullet is flattened laterally, and the back is particularly raised at the starting point of the dorsal fin. The snout is blunt and round. The mouth is small, located below, and horseshoe-shaped. The lips are thick and fleshy, with a deep groove formed between the upper lip and the snout skin; the lower lip is turned outward to form a fleshy fold, and the upper and lower lips have many tiny papillae. No whiskers. The hypopharyngeal bone is sickle-shaped, and the hypopharyngeal teeth are single-row, numerous, arranged in a comb-like pattern, and hooked at the end. The dorsal fin has no hard spines, and the base is very long, extending to the upper and rear of the base of the anal fin. The anal fin is short, the caudal peduncle is slender, and the caudal fin is forked. The scales are large, and the lateral line is complete. The body shape changes greatly at different growth stages. When the body length is 1.6-2.2 cm in the larval stage, the body is particularly slender, and the body length is 4.7 times the body height; when it grows up slightly, the body height increases in the juvenile stage, and when the body length is 12-28 cm, the body length is 2.5 times the body height; when the body length is 58.4-98.0 cm in the adult stage, the body length is about 3.4 times the body height, and the growth of body height slows down during this period. Its body color also changes with the size of the individual. The body length of the larvae is 2.7-8.2 cm, dark brown, with 3 black horizontal stripes on each side of the body, the upper lobe of the dorsal fin and anal fin is grayish white, and the lower edge of the lower lobe is grayish black. The body side of the mature individual is light red, yellowish brown or dark brown, with a wide longitudinal band of carmine red from the tip of the snout to the base of the tail, and the dorsal fin and tail fin are both light red. The development process of the mullet from larvae to adults, the changes in its external morphology and body color, and the past literature records are quite confusing. Some scholars have established new species or described new subspecies based on specimens of different sizes, which is not reliable. In fact, there is only one species of Chinese redfin mullet in my country, and the names of other species and subspecies are all synonyms of this species.

Juvenile and adult Chinese mullet not only have different shapes, but also different ecological habits. In terms of habitat, fry and juvenile fish often like to live in groups among gravels with slow water flow, mostly move in the upper layer of water and swim slowly. Semi-grown fish are accustomed to living in the middle and lower reaches of lakes and rivers, in the middle and lower layers of water bodies, and move slowly. Adult fish mostly live in the upper reaches of rivers, in the middle and lower layers of water bodies, and move vigorously. In mid-February every year (around the Rain Water Festival), parent fish with nearly mature gonads will go upstream and reproduce in the rapids from March to May. The spawning grounds of the Yangtze River are in Jinsha River, Minjiang River, Jialing River and other places. After spawning, parent fish still stay near the spawning grounds until the water recedes in autumn, and then return to the deep water of the main stream to hibernate. Chinese mullet generally reaches sexual maturity at the age of 6 and weighs about 10 kilograms. Chinese mullet mainly feeds on benthic invertebrates and organic matter in the bottom mud, and also eats some higher plant fragments and algae.

Most of the genera and species of the family Asteridae are distributed in North America, with about 14 genera and nearly 80 species in existence. This species is the only species of the family Asteridae known to be distributed in my country. It is found in the upper, middle and lower reaches of the Yangtze River, but the number is greater in the upper reaches; it is also found in the Minjiang River in Fujian, but it is also rare at present.

The Chinese red snapper grows fast, with the body length of a one-year-old fish reaching about 200 mm. A mature individual generally weighs 15-20 kg, and the largest individual weighs up to 30 kg. It is an important economic fish in the upper reaches of the Yangtze River. At present, the number of wild individuals is declining year by year. After the Gezhouba Dam was built, the broodstock in the middle and lower reaches of the Yangtze River could not go upstream to the Tuojiang River, Minjiang River and other large tributaries to spawn, and the environment of some spawning grounds in the Yichang section of the river was also destroyed. Although breeding groups are still found in the river section below the dam, the current downward trend in the number of naturally existing wild groups continues due to overfishing.

Chinese mullet breeding technology

1. Fry cultivation: The fry will be about 1 month old, and the total length can reach 3-5 cm. They mainly feed on benthic invertebrates. The cultivation pond area is 1-2 mu, and the water depth is 1.2-1.5 meters. Before the fry are put into the pond, the pond should be poisoned first, and then basal fertilizer should be applied. The fry should be fed with concentrated feed such as earthworms, eel feed or peanut bran.

2. Adult fish breeding: The characteristics of rosy barbel, such as its omnivorous diet, strong disease resistance, wide adaptability and docile nature, determine that it can achieve good results in pond breeding, whether it is single breeding or mixed breeding. Single breeding method: 400 to 600 large-sized fish species (50 to 100 grams per tail) are released per mu, and a small amount of other species that complement each other in terms of habitat and diet are added to make full use of water bodies and feed. In mixed breeding, the stocking volume per mu is about 200 to 300 fish, and the fish that can be mixed breeding include 200 silver carp, 30 to 50 bighead carp, grass carp and bream. It can also be used as a matching fish to partially replace bottom fish such as carp and crucian carp, and placed in other breeding ponds in small proportions to increase the benefits of pond breeding.

Breeding and management of mullet

The key point of management is to keep the water clear, fresh and fertile, and the second is to feed properly. Water earthworms are the best feed for adult fish, and snails, clams, small fish and shrimps, livestock and poultry viscera, etc. can also be fed. The crude protein content of artificial pellet feed must be above 35%. Mixing ice fresh fish paste and eel feed into a ball and feeding it to mullet has a good effect.

Disease control of Chinese mullet

In the natural environment, Chinese mullet has a strong ability to resist diseases and is generally seldom sick. However, under artificial breeding conditions, Chinese mullet fry, fish species, and adult fish are all sick. Like most fish, the disease prevention and control of Chinese mullet should also implement the principle of "prevention first, prevention and control combined, prevention before disease, and early treatment of disease". Only by taking comprehensive prevention and control measures can the occurrence of diseases be effectively controlled. The specific approach is: in the prevention link, scientific breeding is implemented. On the basis of doing a good job of "seed, bait, density, and management", we insist on frequent disinfection, and do a good job of disinfection of fish ponds, fish species, feeding grounds, and feed (fertilizer). In the non-disease season, spray sterilizers and insecticides once a month; in the disease season (April to June and September to October), disinfect twice a month, and feed a course of medicated bait to prevent the occurrence of diseases.

Common diseases of mullet include gill rot, enteritis, malnutrition, pond infestation and parasitic diseases.

1. Gill rot

It occurs in both adult and juvenile mullets. Because mullets have the habit of clustering, once the disease occurs, it will quickly infect and sometimes cause a large number of fish deaths. Prevention and control methods: First, replace a large amount of water to improve the water quality of the pond; second, thoroughly clean the pond before stocking the fish, and regularly disinfect the water body and feeding area during the process. When the fish disease occurs, use 0.2-0.5 mg/L furazolidone or 1 mg/L bleaching powder to spray the entire pond for 2-3 consecutive days; at the same time, mix the bait and take Yufukang (50-100 grams for 100 kg of fish) or erythromycin (30 grams of active ingredient for 100 kg of fish) orally, once a day, and a course of treatment is 3 days.

2. Enteritis

The main diseases of Chinese redfin mullet fry and young fish. It is easy to occur under poor feed and environmental conditions; the epidemic season is from June to September. Prevention and control methods: First, insist on not feeding spoiled feed; second, strengthen water disinfection. When the disease occurs; sprinkle bleaching powder or 0.3-0.4 mg/L of strong chlorine in the whole pond; at the same time, take sulfaguanidine (or oxytetracycline) bait orally, 5 grams of medicine for every 50 kg of fish on the first day, and half of it from the second day, and use it for 6 consecutive days as a course of treatment, which can effectively cure enteritis.

3. Wilt disease

A malnutrition disease. It is easy to occur in high-density or insufficient feed in ponds during the cultivation of Chinese mullet fry. Prevention and control methods: Strengthen feeding management, stock fish species reasonably, and ensure that fry and fingerlings have sufficient high-quality feed. When atrophy symptoms occur, the diseased fish can be separated and fed with water earthworms with high nutritional value to alleviate the condition.

In addition, parasitic diseases such as Ichthyophthirius and Trichodina often occur during the cultivation of mullet fry. To prevent and control Ichthyophthirius, 0.1-0.2 mg/L of mercurous nitrate is sprayed throughout the pond; to prevent and control Trichodina, a mixture of copper sulfate and ferrous sulfate is used.

You can see that red fish is also called rosy fish.

As a native of Yancheng, I have never heard of it.

have no idea

I don't know about red fish, but I've seen red carp in the river~~~~~~~~~