CATDOLL : CATDOLL: Is there catfish in Weihai?

1. Are there bighead carps in Weihai?

Hello Nana, there are fishing opportunities in Weihai, but I haven't heard of anyone raising these. If you want to know more, please post on websites such as 558 Ganji Baixing Mai Zheng and ask.

2. Are there bighead carps in the Baihe River in Nanyang?

have.

There are many species of fish in Nanyang Baihe River. The common ones are crucian carp, carp, grass carp, silver carp, bream, bream, catfish, black carp, yellow catfish, loach, horse mouth, peach blossom, sardine, etc. There are also precious mandarin fish, fish, river loach, red-eyed trout, slender-bodied d, long-snout d and other fish species.

Nanyang Baihe River (formerly known as U River) is the mother river of Nanyang, the third largest city in Henan Province. It originates from the eastern foot of Yuhuangding in Funiushan Mountain, flows through Nanyang and finally flows to Xiangfan, Hubei, where it flows into Hanshui, the largest tributary of the Yangtze River.

3. What kind of fish is this and what is its scientific name?

fish

Elopichthys bambusa belongs to the genus Elopichthys, family Cyprinidae, subfamily Elopichthys, order Cypriniformes. It is commonly known as yellow check, yellow diamond, yellow cheek fish, rod fish, water tiger, big mouth, and widower. Its English name is Yellowcheck carp. It has a slender, subcylindrical body and a long pointed head. Its snout is pointed and beak-shaped. Its mouth is large and terminal, with a hard protrusion in the middle of the front end of the lower jaw that fits into the depression of the upper jaw. It has no whiskers, and its eyes are small and slightly protruding. There are three rows of hypopharyngeal teeth, and the ends of the teeth are hooked. Its scales are small. Its dorsal fin is small, and its starting point is behind the pelvic fin; its caudal fin is deeply forked. Its back is gray-brown, its abdomen is silvery white, its dorsal and caudal fins are dark gray, and its cheeks and other fins are light yellow.

Table of contents

1. Appearance characteristics

2 Distribution range

3. Living habits

4. Reproduction and Growth

4.1 Breeding

4.2 Breeding requirements

4.3 Broodstock cultivation

4.4 Artificial induction of labor

4.5 Commercial fish farming

4.6 Development of aquaculture technology

5. Pond culture experiment

6 Nutritional Value

1. Appearance characteristics

Freshwater king fish (5 photos)

It has a shuttle-like body, a yellowish color, a silvery-white abdomen, and a bluish-gray dorsal and caudal fins.[1]

The body is slender, slightly flattened, with a round abdomen and no abdominal ridges. The body length is about 80 cm, and the largest can reach 2 meters and weigh up to 60 kg. The head is long and pointed at the front, and the snout is much longer than the width of the snout. The mouth is large and terminal, and the end of the mouth can reach below the edge of the eye. There is a hard bony protrusion at the front of the lower jaw, which coincides with the depression on the front edge of the upper jaw. Both the upper and lower jaws are thick. The eyes are small, the scales are fine, and the lateral line scales are 110 to 117. The dorsal fin III is 9 to 10, which is very small and starts behind the ventral mackerel. The anal fin III is 10 to 11. The caudal fin is deeply forked. The body is slightly yellow, and the abdomen is silvery white; the dorsal and caudal fins are blue-gray, and the cheeks and other fins are light yellow. [2]

2 Distribution range

China except the West

Fish[3]

Except for the north and southwest, it is also distributed in rivers in the plains from north to south.[2]

3. Living habits

Big fish caught in Liujiang River, Guangxi[4]

It mainly lives in the middle and upper layers of rivers and lakes. It swims fast and moves agilely. It is a typical ferocious fish that mainly feeds on fish. It is also a large freshwater economic fish. [5]

The croaker is a large carnivorous fish and also a commercial freshwater fish. It has strong swimming ability and often attacks and hunts other fish. It is more ferocious than the familiar carnivorous fish such as snakehead fish and mandarin fish. [1]

This fish is ferocious and carnivorous by nature. It is very greedy and does not distinguish between meat and vegetables. It will eat anything it sees and will eat anything it can find. Sometimes it can even swallow fish that are larger than its mouth. It feeds on all kinds of fish (including snakehead fish) and is a great enemy of freshwater fish. [2]

Fish is a wide-temperature freshwater fish species. It can survive in a wide range of water temperatures, with the most suitable water temperature for growth being 16-30 degrees Celsius, making it suitable for breeding in most areas of China. [6]

4. Reproduction and Growth

Breeding

Extra large fish[7]

Sexual maturity occurs at 3-4 years old, and adult fish spawn in the rapids of rivers from April to June. Young fish swim from rivers to the affiliated lakes to feed and fatten. After late autumn, young fish and adult fish hibernate deep in the riverbed of the main stream. They grow very quickly, and their body length continues to increase after sexual maturity. The largest individual can reach 2 meters in length and weigh up to 60 kilograms.

It grows rapidly, with a 2-year-old fish weighing 3.5 kg.

The fish grows fast and is large. If feeding is normal, the weight of a one-year-old individual is between 1.0 and 1.5 kg, a two-year-old individual is 3.5 to 5.5 kg, a three-year-old individual is 7.5 to 11.0 kg, and a four-year-old individual can reach 15.0 to 20.0 kg. After sexual maturity, the body length continues to increase, and the largest individual is up to 2 meters long and can weigh up to 60 kg. Male fish usually reach sexual maturity at the age of three and female fish at the age of four. In the wild, parents lay eggs from April to June, and artificial breeding is generally carried out in May. Fish eggs are floating eggs, which absorb water and swell before drifting with the water to complete their development. A mature female fish of one meter in length can carry up to 500,000 eggs. [6]

The ratio of polymorphic sites and Shannon's index of the two populations of wild fish and wild F1 generation artificial breeding were 21.95%, 17.07%, 0.0724, 0.0426 respectively. The estimation analysis of the genetic differentiation coefficient Gst and Shannon's index showed that there was a certain genetic differentiation between the two fish populations. The fish UPGMA phylogenetic tree had obvious divergence, showing a certain genetic divergence. 6 pairs of AFLP selective primers amplified a total of 313 sites and 47 polymorphic sites in 47 individuals of the two populations. The ratio of polymorphic sites of the two populations of wild fish and wild F1 generation artificial breeding was 13.42% and 8.31%, and the Shannon's index was 0.0544 and 0.0320; the genetic diversity of the former was slightly higher than that of the latter. The analysis of the genetic differentiation coefficient Gst and Shannon's index showed that there was a certain genetic differentiation between the two fish populations. The fish UPGMA phylogenetic tree had branches and clustered according to the population, showing a certain genetic divergence. The results showed that the genetic diversity of the fish population was relatively poor; the wild F1 generation artificially bred population had not yet formed its own independent genetic structure, but a certain genetic differentiation had occurred between the two populations, and after many generations of artificial breeding, it was possible to form its own independent and stable genetic structure.

Breeding requirements

Fishermen caught a huge fish in Wanlv Lake.[8]

1. Pond requirements

The pond area can be between 2 and 10 mu, the water depth can be between 1.5 and 2 meters, the bank should be solid and watertight, drainage and irrigation should be convenient, and the thickness of the silt at the bottom of the pond should not exceed 20 centimeters. [9]

2. Stocking pattern and density

2.1 Specialized pond culture

Fish farming is the main method. To regulate water quality, a small amount of silver carp and bighead carp can be raised per mu. The stocking density depends on the pond conditions and management level. Generally, 800 summer flower fish of about 3 cm in length and about 50 one-year-old silver carp and bighead carp of 50g can be raised per mu. [9]

2.2 Mixed culture of fish and crabs

In the fish pond, river crabs can be appropriately raised. Some of the feed (fish pieces) that the fish have not finished eating and have sunk to the bottom of the pond can be ingested by the river crabs, making them "scavengers". This can not only reduce the deterioration of water quality caused by the rotting of residual feed, but also increase the breeding efficiency. Generally, 600 to 800 3 cm long summer flower fish can be raised per mu, and the number of silver carp and bighead carp is the same as that of "special breeding". About 100 to 150 one-year-old crabs with a size of 120 to 200 per kg can be released per mu. At the same time, water peanuts can be appropriately raised on the surface of the pond, and aquatic plants (Vallis or Hydrilla verticillata) can be planted at the bottom of the pond. [9]

3. Feed and feeding method

Fish are ferocious fish that feed on live fish in natural waters. However, in artificial breeding, if live bait is still used, the breeding cost is high, and it is also necessary to equip special feed fish breeding ponds and ensure that the feed fish is palatable, which is more troublesome. Experiments have shown that after fish are domesticated, their feeding habits can change from eating live fish to eating dead fish (fish pieces). Therefore, fish feed can be live fish fry in the early stage and fish pieces in the later stage. Fish feeding habits can be domesticated when the fish is about 5 cm long. Before the body length is 5 cm, palatable live fish fry should be fed. [9]

3.1 Preparation of live feed

The live bait required by the fish in the early stage can be the fry of the "four major carps". There are two ways to prepare and feed live bait. One is to cultivate directly in the fish breeding pond. Half a month before the fish are put into the pond, 150,000 to 200,000 domestic fish are released in each acre of pond, and they are cultivated according to the requirements of summer flower fish cultivation. When the domestic fish fry grows to 1.5 cm, the fish fingerlings of about 3 cm are directly put into the pond to feed the domestic fish fry. Powdered feed should continue to be fed in the pond to cultivate feed fish, so that the feed fish and the fish grow "synchronously" to ensure that the fish have palatable bait at any time. When the fish grows to about 5 cm and the live bait in the pond can no longer meet the needs, the feeding habits are domesticated and palatable fish pieces are fed; the second is to use a special pond to cultivate live feed. In the aquaculture pond, a temporary rearing area of ​​about 10% of the total area of ​​the pond is enclosed with a net, and fish fingerlings of about 3 cm in diameter are placed in it. Live fry are first fed, then a mixture of fry and fish pieces, and finally fish pieces are completely fed. After the conversion of diet is completed, the net is removed. Compared with the two methods, the former is more convenient for early breeding, but domestication is relatively difficult, while the latter is the opposite. [9]

3.2 Domestication

Choose a pond with less silt on the bottom and facing south and sunny as the feeding area, and conduct taming twice a day, at 9 am and 4 pm. During taming, first pour water into the feeding area, then start feeding after a few minutes, and repeat the process of pouring water and feeding. This cycle will allow the fish to form a conditioned reflex, and as long as water is poured into the feeding area, they will quickly gather in the feeding area. The best bait at the beginning is a mixture of live fish fry of appropriate size and fish paste or fish chunks made from small fish, and then transition to using only fish chunks. [9]

3.3 Feeding

After the transformation of diet is completed, fish chunks should be fed at regular times, fixed locations, and fixed quantities, usually once in the morning and once in the afternoon. Before feeding, "water should be poured to attract fish" and fish chunks should be fed after they gather in the feeding area. The amount of feeding depends on the weather, water temperature, and the fish's eating habits. Generally, the daily feeding amount is 5% to 8% of the fish's body weight. If frozen fish chunks are the main feed, fresh fish chunks should be fed at regular intervals, or multivitamins and vitamin C should be added to the frozen fish chunks. [9]

Several fishing enthusiasts show off the giant fish they caught.[10]

4. Daily management

4.1 Strengthen water quality regulation

The daily management methods in fish farming are basically the same as those for other fish farming. During farming, attention should be paid to controlling the water quality, keeping the water fresh, rich in dissolved oxygen, and the transparency should be controlled above 30cm. In the early stage, water injection is the main method, and water can be added every half a month to make the pond water deeper as the fish grow. In the middle and late stages, water should be changed in a timely manner, and quicklime should be sprinkled into the pond regularly. Composite biological agents can also be applied to improve water quality. In hot and humid weather, oxygen should be added in a timely manner to prevent oxygen-deficient floating heads. [9]

4.2 Timely distribution

Fish are fierce in their fight for food, have large appetites, and grow fast, but they vary greatly from individual to individual. Therefore, if screening and separation are not carried out in a timely manner during aquaculture, the big fish will fight for food fiercely, eat more, and grow faster, while the small fish will not be able to get food and will grow slower. At the same time, the phenomenon of "small fish cannot eat big fish pieces, and big fish cannot eat small fish pieces" will occur. Ultimately, the weight of fish raised in the same pond will differ by more than 10 times. Therefore, in the process of aquaculture, separation should be carried out in a timely manner according to their growth conditions. [9]

4.3 Disease control

Fish pond farming has just begun, and no specific diseases have been found yet. However, attention should be paid to disease prevention during the farming process. First, 75 to 100 kg of quicklime per mu should be sprinkled throughout the pond before use to improve the pond bottom quality and kill pathogens. Second, fish fingerlings should be soaked and disinfected in salt water before being put into the pond. Third, feed fish should be safe and hygienic, meet relevant requirements, and the feeding area should be disinfected regularly with bleaching powder or strong chlorine. [9]

Broodstock cultivation

There are fewer and fewer wild fish. Catching broodstock in rivers and lakes is time-consuming and laborious, and often results in nothing. Broodstock are generally imported from regular fish farms. If fish have been farmed for many years, broodstock can also be selected from commercial fish.

Broodstock should be selected from sexually mature individuals with strong physique, no injuries or diseases, with a male-female ratio of 1:1.5.

Broodstock are usually intensively cultivated in earthen ponds of 6-10 mu (667 square meters per mu). The water depth is between 1.5 meters and 2 meters. The dissolved oxygen content in the water is kept above 5 mg per liter. Oxygen is added for 4-8 hours every day on rainy days or in hot seasons, mainly between 2 and 3 o'clock in the afternoon, or between 1 and 6 o'clock in the morning.

The stocking density is controlled at about 300 kg per mu. About 100 silver carps weighing 250 grams can be placed in each mu of pond. They can help the broodstock improve the water quality. If the broodstock have been domesticated and can eat iced fish pieces, they should be fed with fish pieces that account for about 8% of their body weight every day; if the broodstock have not been domesticated, there must be enough live bait fish in the pond, and live fish that account for 5% of their body weight should be put into the pond regularly every day.

Maturity identification: The abdomen of mature female broodstock is swollen, soft and elastic to the touch, and the genital opening is swollen and slightly red. When the male fish is sexually mature, white semen will generally flow out if the abdomen is lightly pressed, and it will disperse as soon as it enters the water.

If the induced spawning pond is more than 500 meters away from the broodstock pond, reasonable measures must be taken. After catching the broodstock, use a special cloth to hold the broodstock, and do not let it collide to prevent it from escaping and getting injured. Put an appropriate amount of water into a plastic bag and put the broodstock into the plastic bag. Then use a cloth to hold it, lift it to the oxygenator to oxygenate it, and then transport it.

Artificial induction of labor

Fish(5 photos)

The broodstock should be placed in the spawning pond first to allow them to adapt to the water environment of the pond before artificial spawning can be carried out.

1) Oxygenation Pool

The spawning pool is a circular cement pool with a radius of 2 meters, a depth of about 1.5 meters, a water depth of 1.2 meters, and a water visibility of more than 50 centimeters. Each spawning pool can hold 5-6 broodstock. Generally, 2 female fish are paired with 3 male fish of the same age. If the male fish are younger, more male fish can be appropriately paired.

2) Preparation of oxytocin

Each type of fish has its own oxytocin. For fish, preparing the right oxytocin is an important factor in ensuring the success of fish reproduction. After continuous practice, he figured out a "secret recipe" for preparing fish oxytocin.

Fish oxytocin is made up of three drugs, namely carp pituitary, luteinizing hormone releasing hormone A2 (ovulation hormone No. 2) for injection, and chorionic gonadotropin for injection. Carp pituitary can accelerate the maturation of parent fish gonads, increase the spawning rate of parent fish, and also reduce the mortality rate of parent fish. The dosage is 2-3 mg; luteinizing hormone releasing hormone A2 for injection can promote the release of luteinizing hormone and follicle-stimulating hormone from the pituitary of parent fish, thereby inducing parent fish to lay eggs. The dosage is 200 micrograms; chorionic gonadotropin for injection can promote the maturation of follicles of parent fish and make parent fish lay eggs as soon as possible. The dosage is 100,000 units, and 50,000 units are one bottle. Each bottle of luteinizing hormone and each bottle of chorionic gonadotropin for injection is diluted with 1 ml of 0.9% saline. Then mix all the drugs together and grind them continuously to make the solid carp pituitary fully dissolved in the solution in powder form. After the drugs are prepared, induced labor can be carried out.

3) Induction of labor

Fish are large, so artificial induction of labor usually requires the cooperation of multiple people. Fish are quick to react and have a ferocious temperament. In order to avoid harming the fish and facilitate fishing, the parent fish should be fixed in a small area with a fishing net. When inducing labor, the parent fish are supported with a cloth clip, and then injected at the base of the parent fish's pectoral fin. The injection dose is: for female fish, the kilograms of body weight multiplied by 0.3 (ml); for male fish, the kilograms of body weight multiplied by 0.3 and halved (ml). If the female fish weighs 15 kg, its injection dose is 15 times 0.3, which is 4.5 ml; if it is a 15 kg male fish, its injection dose should be 2.25 ml. Fish usually lay eggs after 9 hours.

After inducing spawning, water should be continuously added to the spawning pool, the drain should be opened, and the circulating water should be used to stimulate the broodstock to ensure that they lay eggs on time.

Fry cultivation: The fry stage refers to the stage of cultivating fry from 3 days after hatching to a body length of about 3.3 cm, which usually takes about 20 days. It is best to use an earthen pond for fry cultivation, and the area is generally between 3-4 mu (667 square meters/mu).

1. Planting seedlings

Before stocking, clean and disinfect the pond, then fill it with water to a depth of 1.0 to 1.5 meters. When stocking, put a plastic bag into the pond water and pour water on it to let the fry adapt to the temperature of the pond water. After 15 to 20 minutes, you can put the fry into the pond. 50,000 to 100,000 fry can be put into each acre of pond.

2. Feeding management

At this stage, the fry only need to be fed with soy milk. Soy milk is not only food for the fry, but also provides nutrition for plankton, increases the number of plankton in the water, and provides live bait for fish. Use 3-4 kg of dry soybeans per mu every day, grind them into soy milk and sprinkle them all over the pond. There are some particular ways to sprinkle soy milk! Experienced masters sprinkle soy milk like it is drizzling. This master is very familiar with it. He sprinkles the soy milk evenly and evenly. The soy milk falls on the water like small white flowers. When the fry are 3.3 cm long, they can be sold or transferred to the fingerling stage for cultivation. In production, the fry at this stage are called "summer flowers".

Fingerling cultivation: For fish, the fingerling stage is the stage of cultivating fry from about 3.3 cm to about 10 cm in length. People divide this period into two stages, 3.3-5 cm and 5-10 cm.

Commercial fish farming

Fish are called commercial fish when they grow from 10 cm in length to the stage of being sold. About 1,500 commercial fish can be raised in one acre of pond.

1. Feeding

Feed the fish at a fixed time every day, once in the morning and once in the afternoon. The daily feeding amount is 5-8% of the fish body weight. The fish pieces should be gradually increased as the fish grows. The size of the fish pieces should be determined according to the size of the commercial fish.

2. Water quality management

During the management of commercial fish, oxygen is generally added for about 2-3 hours at noon every day to ensure that the dissolved oxygen content in the water is about 5 mg/L. On rainy days or high temperature seasons, oxygen is added for about 4-8 hours every day. The pH value of the pool water should be maintained between 7.0-9.0. If the pH value of the pool water is lower than 7.0, quicklime should be used to adjust it. The amount of quicklime is 15-20 kg, which should be diluted with water and then sprinkled throughout the pool.

3. Grading

Fish must be graded in a timely manner when raised. Fish of similar size and liveliness should be picked out and raised in the same pond, while smaller ones should be moved to other ponds for special breeding.

Farming technology development

A detailed study of the biological characteristics, digestive system characteristics and intestinal histology of fish in the Dongting Lake area and other places, the chemical composition of fish muscle and the nutritional value of food, etc., provided an applied theoretical basis for the artificial breeding and aquaculture. A comprehensive study of the artificial breeding of fry, seedling cultivation and adult fish farming techniques was conducted. The induced spawning rate, fertilization rate and hatching rate of pond domesticated parents were over 90%, the survival rate of cement pond cultivated fish was 90.89%, the survival rate of cage cultivated fish was 86.4%, and the food conversion rate of juvenile fish with a body length of 8-10 cm was over 95%. The survival rate of main pond culture was 98.7%, with an average yield of 959.6 kg/667 m2 and an average catch size of 8.78 kg/fish; the survival rate of cage culture was 100%, with an average yield of 87 kg/667 m2 and an average catch size of 9.13 kg/fish; the commercial size of 2-year-old fish cultured in cages reached 6.12 kg/fish that year, with a survival rate of 90.1%; the survival rate of 3-year-old fish was 100%, with an average size of 16.73 kg/fish and a yield of 85.7 kg/m2; the average size of 6-7 cm fish stocked in lakes reached 5.54 kg/fish in the two years since December 31, 2004, and the catch rate was 12.26%. [11]

5. Pond culture experiment

Related pictures (8 pictures)

1. Materials and Methods

1. Pond conditions

The test pool is 3.4 acres in area and 1.8 meters deep. The bottom of the pool is muddy and 10 cm thick. The bottom of the pool is flat with a slope ratio of 1:2.5. It is easy to drain and inlet water. The water quality is pollution-free and leak-proof. It is equipped with a 2.2KW submersible pump. The water inlet is filtered with a 40-mesh filter, and the outlet is equipped with a fine-mesh net to prevent whales from escaping. [12]

Before stocking the fish, use 150kg/mu of quicklime and water to thoroughly clean and disinfect the pond. After disinfection for a week, add water to 1.2m. Then gradually increase the water level as needed.

2. Source of seedlings and stocking

The seedlings were sourced from a research institute in Zhejiang Province. They were artificially propagated in late May 2003 and cultivated until early July. The seedlings were about 5 cm in size. They were put into the pond on July 11, 2003, and later stocked with bighead carp, silver carp and other fish species. [12]

3. Feeding and domestication

After the fish pond is cleaned with lime, a small temporary rearing area of ​​about 120m2 is enclosed at the water inlet of the south-facing sunny area of ​​the pond with a polyethylene net (mesh size 0.6cm). The fish fry are first temporarily reared in it. Domestication begins on the second day after the fry are released, four times a day, at 9:00 a.m., 11:00 a.m., 2:00 p.m. and 4:00 p.m. The feed is fish paste made from small marine and freshwater fish, which is of an appropriate size. Each feeding time is more than 30 minutes. First, splash water and feed every few minutes, then splash water again and feed every few minutes.

This cycle repeats itself, forming a conditioned reflex and allowing the fish to develop the habit of eating at regular times and locations. After 10 days, the fish are successfully domesticated, the net is removed, and the domestication process is complete. [12]

4. Feeding and management

(1) Water quality regulation: Due to the large amount of leftover bait and excrement of feed fish, the water quality is prone to deterioration. During the breeding process, the water quality is constantly adjusted. In the early stage, water is mainly injected. 15-20 cm of new water is added every 7 to 10 days. The water level in the fish pond continues to deepen as the fish grows. In the middle and late stages, part of the old water is replaced every 5 to 10 days. Quicklime is sprinkled once every half a month, with a dosage of 10-15 kg/mu, to keep the pond water fresh.

The test was not equipped with an aerator, so in hot weather, a 2.2KW submersible pump was used to flush water appropriately. The water quality was "rich, active, tender and refreshing".

(2) Feeding management: After successful feeding, feed the fish twice a day at a fixed time and place, at 10 a.m. and 3 p.m. The specific operation should be flexible, with appropriate increase or decrease in feeding until the fish no longer compete for food. Keep the feed fresh, and avoid feeding rotten or spoiled feed to prevent disease.

(3) Fish disease prevention and control:

During the experiment, the principle of "prevention first" was adopted. The fish were disinfected by immersing them in 3% salt water before stocking. During the breeding process, they were given a course of oxytetracycline (mixed with food) for 3 days every half a month, and the feeding area was disinfected regularly with strong chlorine. No fish diseases occurred during the entire breeding process. [12]

2. Results, yield and benefits

After half a year of breeding, all the fish were sold out by January 15, 2004. The 3.4 mu pond produced a total of 1,396 kg of adult fish, with an average yield of 410 kg per mu, of which 331.2 kg were fish, accounting for 80.8%. The total income was 43,900 yuan. The average size of the fish was 500 g, and the average selling price was 38 yuan/kg. The total expenditure was 14,500 yuan, the total profit was 29,400 yuan, and the profit per mu was 8,647.1 yuan, with an input-output ratio of 1:3.03. [12]

3. Experience

1. Using fresh ice fish to breed fish can achieve high yield and high efficiency. Fish is large and grows fast. After scientific breeding, the seedlings can reach 500g in the same year and the market size can be achieved in the same year. The price is high and good economic benefits can be obtained.

2. During the breeding process, compared with the breeding pond of red snapper, at a certain breeding density, the fish-sensing fish is obviously more tolerant to low oxygen and more aggressive in snatching food than the red snapper. Therefore, in the future breeding promotion, the breeding density can be 800-1200 per mu.

3. In the dry pond, we found some fishbone fish that had escaped from the adjacent ponds at the bottom of the pond, with a size of more than 400g. This shows that it is feasible to raise fishbone fish in the future to increase the benefits. [12]

6 Nutritional Value

Fish morphology pictures (5 pictures)

This fish is at the top of the fish food chain. It is large in size, has firm and delicate meat, and tastes delicious. It has always been listed as a top-quality edible fish, and the dried fish made from it is loved by many people. [1]

Its meat is delicious and has always been listed as a large, high-quality edible fish. Every 100 grams of edible part contains 18.1-20.8 grams of protein, 1.3-5.4 grams of fat, 84-132 kcal of calories, 11-24 mg of calcium, 144-203 mg of phosphorus, 0.7 mg of iron, 0.04 mg of thiamine, 0.15 mg of riboflavin, and 1.7 mg of niacin. Its meat is used fresh as medicine, and has the effects of warming the middle, benefiting the stomach, and stopping vomiting. It is mainly used to treat spleen and stomach weakness, nausea and vomiting, and is suitable for regular consumption. [9]

7. Pest and disease prevention

Fish(5 photos)

Pests and diseases may cause a large number of fish deaths. During the breeding process, we must pay attention to it. Prevention is the main way to deal with pests and diseases. Commonly used medicines include copper sulfate and B-type insecticide No. 2.

Copper sulfate is a sky blue granular crystal. It is used as an insecticide and fungicide in agriculture. It is often used to disinfect larger fish such as commercial fish and broodstock. When using, dilute it with water and spray it all over the pond. The dosage is about 60 grams per mu. Spray it into the pond once a month. Type B Insecticide No. 2 is a water disinfectant and insecticide that can also improve water quality. It is suitable for disinfecting small fish such as water lilies and summer lilies. When using, dilute it with water and spray it all over the pond. The dosage is about 80 grams per mu. Spray it into the pond once a month. [6]

More atlases

Fake fish (5 photos)

Fish(5 photos)

Freshwater king fish (5 photos)

Fish(5 photos)

Related pictures (8 pictures)

Fish morphology pictures (5 pictures)

Fish(5 photos)

Entry pictures (6 pictures)

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References

1. Artificial breeding of fish in Jianli succeeded. People's Government of Bianhe Town, Jianli County [cited date].

2. “Freshwater fish nemesis” appeared in Zhutang River, 62 cm long and 3.8 catties in weight (fish). Chaohu News Network (hosted by Chaohu Daily under the supervision of Chaohu Municipal Party Committee Propaganda Department) [cited date].

3. [Agricultural News] Fish Farming Technology (20120117) ． China Internet Television [cited date] ．

4. A big fish was caught in Liujiang River, Guangxi. Xinhuanet [cited date].

5. Cili County fish industry has achieved initial success. Hunan Agriculture (Hunan Provincial Department of Agriculture) [cited date].

6. Fish farming technology. China Rural Distance Education Network [cited date].

7. A citizen in Changzhou caught a huge fish, 1.35 meters long and weighing 32 kilograms (photo). Sina.com [cited date].

8. Giant freshwater fish appear repeatedly in Wanlv Lake, Guangdong (photo) (fish) ． Northern Network [cited date] ．

9. Fish pond culture technology. Dabie Mountain New Agriculture Network (sponsored by Huanggang Science and Technology Bureau) [cited date] ．

10. A giant fish was found on Chongming Island in Shanghai, 1.51 meters long and weighing 62 kilograms [Photos]. Xinhuanet [cited date].

11. Fish biology research and breeding technology passed technical appraisal. Nanhu News Network (Publicity Department of the Party Committee of Huazhong Agricultural University) [cited date].

12. Fish pond culture technology. Department of Fisheries Science, Xinyang Agricultural College [cited date].

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fish

Scientific classification

Purpose:

Carp

division:

carp

Subfamily:

Yale fish

Genus:

Basic Information

Chinese Name:

Elopichthys bambusa belongs to the order Cypriniformes, the family Cyprinidae, the subfamily Elopichthys, and the genus Elopichthys. It is commonly known as yellow croaker, yellow diamond, yellow cheek fish, pole fish, water tiger, big mouth, and widower.