CATDOLL : CATDOLL: For crucian carp farming, a pond of one acre and one meter deep can raise 5,000 kilograms

To cultivate crucian carp, a pond of one acre and one meter deep can produce 5,000 kilograms

1. Fish stocking model and cultivation technology

Stocking mode: 10,000-12,000 crucian carp are stocked per mu in mid-April. Carp, grass carp and other fast-growing and ferocious fish are prohibited. Domestication of breeding technology: In the early stage, soy milk is mainly used with bloodworms. Sprinkle on one side of the feeding table and gradually reduce the area. When the crucian carp grows to about 5 cm in length and weighs about 10 grams, use full-price particles to sprinkle on one side of the feeding table and gradually reduce the splashing area to form several points. Finally, gather the feeding table. According to the fatness and thinness of the water, drug treatment is carried out to make the water clear and thin, which is conducive to the domestication of crucian carp. Generally speaking, it takes about 10 days to domesticate crucian carp. Four methods are used for feeding. The actual feeding amount is adjusted at any time according to the weather, season, water temperature and the growth of the fish. Water quality management: Keep the dissolved oxygen at 3 mg/L and the transparency at 25-30 cm. Fish diseases are mainly prevented.

2. Crucian carp fish breeding technology

Stocking mode: In mid-April, release about 1500-1800 crucian carp, with an average size of 50 grams. It is forbidden to mix with carp, grass carp and other fast-growing and ferocious fish. Breeding technology domestication: fixed-point feeding throughout the day, 10-15 are required. Feeding method: adopt the four-fixed method. Particle selection: small rather than large, the standards are as follows: less than 30 grams, feed diameter 1.0, 30-100 grams, feed diameter 1.5, 100-200 grams, feed diameter 2.4 mm. The monthly feeding amount accounts for the proportion of the whole year as shown in the following table: Unit (%) April May June July August September October 3 10 18 24 24 15 6 Water quality management: maintain dissolved oxygen> 3 mg/L, transparency 25-30 cm. Fish disease prevention: prevention is the main focus.

3. Notes on the domestication of crucian carp:

(1) Adding an appropriate amount of attractant to the feed can shorten the acclimation time and increase the food intake of crucian carp.

(2) Combination species: Do not combine with fish that grow fast, have a short floating time, or are aggressive feeders.

(3) Stocking density: The appropriate density should be maintained at 2,500 fish/mu. A high density means a large group size and is easy to domesticate. Otherwise, the domestication time is long and the percentage of fish that float to the surface to grab food is low.

(4) Be patient and careful when taming the animal.

(5) During the acclimation period, the water quality should be clear and thin rather than turbid and rich.

Whether a one-acre pond with a depth of one meter can raise 5,000 kilograms of crucian carp depends on the actual situation.

1. Stocking mode and cultivation technology of fish species Stocking mode: In mid-April, 10,000-12,000 crucian carps and 1,000-1,200 silver carps and bighead carps are stocked per mu. Silver carps and bighead carps are required to be stocked after crucian carps have formed the habit of floating up to grab food. It is forbidden to mix with carp, grass carp and other fast-growing and fierce fish. Breeding technology Domestication: In the early stage, soy milk is mainly used with bloodworms. Sprinkle on one side of the feeding table and gradually reduce the area. When the crucian carp grows to about 5 cm in length and weighs about 10 grams, use full-price particles to sprinkle on one side of the feeding table and gradually reduce the area of ​​​​sprinkling to form several points, and finally gather on the feeding table. According to the fatness and thinness of the water, the drug treatment is carried out to make the water clear and thin, which is conducive to the domestication of crucian carp. Generally speaking, it takes about 10 days to domesticate crucian carp. The four-fixed method is used for feeding. The actual feeding amount is adjusted at any time according to the weather, season, water temperature and fish growth. Water quality management: maintain dissolved oxygen at 3 mg/L and transparency at 25-30 cm. Fish diseases are mainly prevented. 2. Stocking mode of crucian carp breeding technology: about 1500-1800 crucian carp are released in mid-April, with an average size of 50 grams, and 250 silver carp are released per mu, with an average size of 50 grams. 25 bighead carp, with an average size of 50 grams, are prohibited from being matched with carp, grass carp and other fast-growing and ferocious fish. Silver carp and bighead carp are released after the main crucian carp has formed the habit of floating up and grabbing food. After 6 months of careful breeding, the high-yield crucian carp is more than 600 kg, with an average size of 300 grams. Domestication: fixed-point feeding all day, which takes 10-15 days. Feeding method: adopt the four-fixed method. Particle selection: Small is better than large. The standard is as follows: 30 grams or less, feed diameter 1.0, 30-100 grams, feed diameter 1.5, 100-200 grams, feed diameter 2.4 mm. The monthly feeding amount accounts for the proportion of the whole year as shown in the following table: Unit (%) April May June July August September October 3 10 18 24 24 15 6 Water quality management: Keep dissolved oxygen>3 mg/L, transparency 25-30 cm. Fish disease prevention and control: Prevention is the main focus. I. Precautions for crucian carp domestication: (1) Adding an appropriate amount of attractant to the feed can shorten the domestication time and increase the crucian carp's food intake. (2) Matching species: It is forbidden to match with fish that grow fast, have a short floating time and are ferocious feeders. (3) Stocking density: The appropriate density should be maintained at 2,500 fish/mu. A large density means a large group size and is easy to domesticate. On the contrary, the domestication time is long and the percentage of floating to grab food is low. (4) The best time to release silver carp and bighead carp is after the main aquaculture crucian carp has formed the habit of floating up to grab food. (5) Patience and seriousness are required during acclimation. (6) The water quality during the acclimation period should be clear and thin, not turbid and rich.

What should I pay attention to when raising red carp?

Question 1: How to raise red carp This method is very useful, but it is a little longer o(∩_∩)o...

Basically, changing one-fifth of the water every day is enough. It is best to use water that has been exposed to the sun, so that chlorine can be removed. Also, when changing the water, the temperature difference in the tank should not exceed 5 degrees.

In spring (March to May in the Gregorian calendar), the temperature gradually rises, generally between 10 and 20 degrees Celsius, and the water temperature environment is more suitable for the growth and reproduction of various pathogens, especially April to May is the peak season for fish diseases - barley yellow. When the fry are hatched in early spring, the fish eggs are susceptible to Saprolegniasis; the fry are mainly susceptible to wheelworms, Ichthyophthirius, Dactylopius, Diplostomum, fish lice and other fish diseases; in spring, adult fish are susceptible to microbial fish diseases, such as viral hemorrhagic disease, enteritis, gill rot, printing disease, and silver carp iodine spore disease.

In summer (June to August in the Gregorian calendar), the temperature is generally between 26 and 28 degrees Celsius, and fish diseases are slightly less common than in spring. At this time, fish species gradually grow up and their disease resistance is enhanced. Therefore, ciliate and flagellate fish diseases gradually decrease. In addition, according to surveys, microbial fish diseases in spring continue to exist in summer, including gill rot, hemorrhage, red skin, enteritis, and printing disease. At this time, anchor fish disease is more common among parasites. In midsummer, high-yield ponds are often prone to flooding.

In autumn (September to October in the Gregorian calendar), the temperature gradually drops, and the temperature is generally between 23 and 15 degrees Celsius. The water temperature environment is basically similar to that in spring, especially August to September is the peak season for fish disease - "Bai Lu Xin". Summer fish species mainly suffer from wheelworms, Ichthyophthirius, Dactylopius, complex trematodes, fish lice and other fish diseases. In autumn, large-sized fish are prone to microbial fish diseases, such as viral hemorrhagic disease, enteritis, gill rot and other diseases.

In winter (December to February in the Gregorian calendar), the temperature is relatively low, generally between 3-6 degrees Celsius, and fish diseases are rare. Winter is the period for stocking fish, and fish bodies are often scratched by netting or transportation, and Saprolegniasis may also occur; when the water temperature is high, it is possible to develop tricholoma and Ichthyophthirius; when the water temperature of overwintering fish is below 10 degrees Celsius, the temperature difference between the air temperature and the water temperature in the wintering room is too large, and the fish will float to the surface due to lack of oxygen, causing frostbite on the top of the head.

There are 12 common fish diseases that can be caused by the change of temperature in spring, summer, autumn and winter. Among them, there are 7 main parasitic diseases: trichodinasis, Ichthyophthirius, Dactylopius, anchorhead mycidiella, fish lice, silver carp iodine spore disease, and Chinese mycidiella; there are 5 main microbial diseases: hemorrhagic disease (red skin disease), enteritis, gill rot, printing disease, and saprolegniasis. As the saying goes, "If you don't raise fish plague, you will be rich." In fish farming, once fish diseases occur, mild cases will affect the growth and development of fish, and severe cases will cause the death of some fish. Therefore, it is necessary to attach importance to the prevention and control of fish diseases and actively implement the policy of "early prevention when there is no disease and early treatment when there is disease."

You can identify the gender of fish based on their size, shape, color, tail whiskers, fins, etc.

There are many types of fish. If you cut open a fish's belly and see a belly full of eggs, it's a female fish; if there's no eggs but a milky white "white" inside, it's a male fish. But if you were given a live fish, how would you tell the sex of the fish?

Or identify it from the appearance.

Look at the fish's fins. The female loach's pectoral fins are blunt at the end, while the male's are pointed. The male carp's pectoral fins are larger than the female's. The male's dorsal and anal fins are longer, and there are some yellow-green spots on the pelvic fins, while the female's do not.

Look at the size and shape of the fish. For carp and crucian carp, female fish of the same age from the same origin are always larger than male fish. For tilapia (also called African crucian carp), the reproductive pore and urinary pore of female fish are separate, while those of male fish are combined, so female fish have one more pore than male fish, but are smaller in size. Female silverfish are transparent and scaleless, while male silverfish have a row of scales above the base of the anal fin. Female anchovies are large and full-bellied, while male fish are small and thin.

Let's look at the color of the fish. Many fish can change color. The male fish originally has a gray-black back and a silvery-white belly. During the breeding season, the body will turn sky blue with a hint of red and yellow, which is colorful and very beautiful. When the male fighting fish fights, the color of the whole body will suddenly change. During the breeding season, it will also put on a beautiful coat, shining with golden light, which is a "wedding dress"; the female fighting fish is not so gorgeous, with some gray stripes on the brown body. Male goldfish will have some fine sand-like particles on their gill covers and fins, but female fish will not.

To raise fish, you must first raise water

For fish farmers, there are four types of water: one is fresh water, which is freshly dried tap water or freshly dug well water. Although this water is very clean, it is very different from the environment in which fish live in nature. Since there are no nitrifying bacteria in the water, the fish's excrement and scattered food residues will rot and become...>>

Question 2: What should you pay attention to when raising red carp? There is nothing else to pay attention to except accepting my advice! ^_^

Question 3: What should I pay attention to when raising red carp at home? Red carp is koi, right? Koi breeding techniques 1. Stocking density Before raising koi, you must first consider the size of the breeding container and the number of koi that can be accommodated. The appreciation of koi mainly lies in its gorgeous colors, strong body shape, elegant movements and beautiful posture of swimming in groups. Moreover, koi must be viewed from the back, that is, from the upper side, which is much less attractive if viewed from the side. To fully meet these conditions, only garden ponds can be raised. However, as urban residents, not everyone has a garden, so they have to use an aquarium instead. Regarding the stocking density, it should be adjusted in combination with the size of the container, water volume, water temperature, oxygenation status, fish size and growth conditions. 2. Variety matching When raising in a garden pond, red and white, Taisho Sanshoku, Showa Sanshoku, gold or platinum, autumn water, light yellow, etc. are generally matched. In an aquarium, people can only see the side of the koi. You can choose koi with reflective fish bodies, such as gold, platinum gold, Matsuba gold, Yamabuki gold, etc., and then match them with German carp. But whether it is raised in a ground pond or an aquarium, most of them are brightly colored koi, supplemented by darker, shiny and elegant ones. 3. Feeding method Koi is an omnivorous fish, and can be fed with animal or plant baits, such as water fleas, water worms, shrimps, corn flour, biscuit crumbs, instant noodle crumbs, vegetables, and even rice balls. But if you want koi to be brightly colored, in addition to matching the lighting, background and water quality, it is more important to feed them with highly nutritious special koi color-enhancing artificial feed, which is in flake or granular form. The bait can be put in alone or alternately. Koi is relatively greedy. If you feed too much, you will suffer from food accumulation or constipation. So pay attention to the amount and frequency of feeding, and follow the principle of small meals, no residual bait and bad water. For hatched young fish, you can feed rotifers, water fleas or egg yolks at first. Small fish about 2 cm should be fed with baits such as bloodworms. For fish that grow to more than 5 cm, you can eat animal or plant baits at will. Here are some basic tips, you can take a look: zhidao.baidu/question/4515189

Question 4: What should I pay attention to when raising red carp for the first time? (1) Feeding: The broodstock breeding pond is 1-2 mu, with a water depth of about 1.2 meters, sheltered from the wind and facing the sun, with convenient drainage and 150-200 kg per mu. When artificially breeding, males and females should be separated to prevent them from mating and spawning on their own. Disinfect with quicklime or bleaching powder before releasing.

(2) Management: Strengthen the cultivation of broodstock carp, and feed them high-protein feeds such as bean cakes, silkworm pupae, and fish meal. In recent years, some manufacturers have developed broodstock feeds that are rich in vitamins and other vitamins, which can promote development and improve stress resistance, with good results. At the same time, during the breeding process, attention should be paid to regulating the water quality, adding fresh water frequently, and maintaining micro-flowing water to promote gonadal development.

Question 5: How to raise red carp? Koi (red carp) breeding techniques

1. Stocking density

Before raising koi, you must first consider the size of the breeding container and the number of koi that can be accommodated. The main attraction of koi is its gorgeous colors, strong body shape, elegant movements and beautiful swimming posture. Koi are best viewed from the back, that is, from above. They are much less attractive if viewed from the side. To fully meet these conditions, only garden ponds can be used for breeding. However, as urban residents, not everyone has a garden, so an aquarium is used instead. Regarding the breeding density, it should be adjusted in combination with the size of the container, water volume, water temperature, oxygenation status, fish size and growth conditions.

2. Variety matching

When raising koi in a garden pond, they are usually matched with red and white, Taisho Sanshoku, Showa Sanshoku, gold or platinum, autumn water, light yellow, etc. In an aquarium, people can only see the side of the koi, so they can choose koi with reflective fish bodies, such as gold, platinum gold, Matsuba gold, Yamabuki gold, etc., and then match them with German carp. But whether it is raised in a pond or an aquarium, most of the koi are brightly colored, supplemented by darker, shiny and elegant ones.

3. Feeding method

Koi are omnivorous fish, and can be fed with animal or plant baits, such as water fleas, water worms, shrimps, corn flour, biscuit crumbs, instant noodle crumbs, vegetables, and even rice balls. But if you want Koi to be colorful, in addition to the lighting, background and water quality, it is more important to feed them with highly nutritious special Koi color-enhancing artificial feed, which comes in flakes or granules.

Bait can be placed alone or alternately. Koi are quite greedy. If they are fed too much, they will suffer from indigestion or constipation. Therefore, you should pay attention to the amount and frequency of feeding, and follow the principle of feeding small meals frequently, without leftover bait or spoiled water.

For hatched young fish, you can initially feed them rotifers, water fleas or egg yolks. Small fish of about 2 cm should be fed with baits such as bloodworms. For fish that grow to more than 5 cm, they can eat any animal or plant bait.

Question 6: How to raise red carp at home? 1. Selection and breeding of parent carp

1 Selection criteria: good body shape, strong activity and no injuries, body length to height ratio of 3:1, with typical breed characteristics. Female fish should be at least 2 winters old and weigh 1.5kg, and male fish should be 2 winters old and weigh more than 1kg. Carp in the initial sexual maturity and aging period have poor egg carrying capacity and egg quality, so they are not suitable for broodstock.

2. Gender identification

Non-reproductive season: the female fish has a wide body, high back, small head, large and soft abdomen, small and wide pectoral and pelvic fins, a flat or slightly protruding cloaca, and radial folds; the male fish has a long and narrow body, a large head, a small and hard abdomen, large and long and pointed pectoral and pelvic fins, and a slightly concave anus without parallel wrinkles.

Reproductive season: The female fish has a soft, round sac-shaped belly, with a relatively large anus and genital opening that are slightly red and prominent; the male fish has a smaller belly, with obvious secondary sexual characteristics on the gill covers, pectoral and pelvic fins; the anus and genital opening are concave and not red or swollen, and milky white fluid will flow out if the abdomen is pressed lightly.

3. Feeding and management

(1) Breeding: The broodstock breeding pond is 1-2 mu, with a water depth of about 1.2 meters, sheltered from the wind and facing the sun, with convenient drainage and 150-200 kg per mu. During artificial breeding, males and females should be separated to prevent them from mating and spawning on their own. Disinfect with quicklime or bleaching powder before release.

(2) Management: Strengthen the cultivation of broodstock carp, and feed them with high-protein feeds such as bean cakes, silkworm pupae, and fish meal. In recent years, some manufacturers have developed broodstock feeds that are rich in vitamins and other vitamins, which can promote development and improve stress resistance, with good results. At the same time, during the breeding process, attention should be paid to regulating the water quality, adding fresh water frequently, and maintaining micro-flowing water to promote gonadal development.

2. Induction and incubation

1. Timing of inducing labor: When the water temperature rises and stabilizes above 16°C, labor can be induced. Usually, during the period from Qingming to Guyu, after the cold wave, when the temperature rises and stabilizes, labor can be induced.

2. Methods of inducing labor

(1) Natural spawning is a very common method because of its small investment and scale.

a Spawning pond: 0.5-1 mu in area, 1.2 meters deep, any pond with convenient drainage and filling. Fish can be released one week after disinfection with quicklime.

b. Artificial fish nest: used to attach fish eggs. Choose soft, tough, non-toxic, and non-perishable materials, such as pine branches, palm leaves, polyethylene sheets (woven bags), poplar roots, etc., and clean, tie, and disinfect (0.3‰ formaldehyde or malachite green) before use. Rice straw is not suitable for fish nests because it is easy to rot.

c Hatching pond: It can also be used as a fry breeding pond. It should be small (1-2 mu), with little silt, 1 meter deep and disinfected. The inlet and outlet should be filtered with dense mesh to prevent impurities from entering the pond and fry from escaping.

d. Pooling and spawning: Pool 35-30 groups of mature parent carp at a ratio of 1:1-1.5, and slowly add new water. At the same time, pull 1-8 thin wires on the water surface, and hang artificial fish nests on the wires (or break a bamboo into two and sandwich it in the middle and place it on the water surface). Usually, each group of parent fish should be equipped with 4-6 fish nests.

e Management: Generally, spawning occurs between 22:00 and 9:00 and lasts for 2-3 days. Therefore, the fish nests should be checked and cleaned every afternoon, and the fish nests with eggs should be moved to the hatching pond, and new fish nests should be added at the same time. If spawning is not good after the ponds are combined, the water level can be lowered to allow sunlight to shine, and more VE can be added to the feed, or it can be incubated with micro-flowing water. In order to ensure the uniformity of the fry, the eggs of the same day should be incubated together, which can also prevent the increase of blind eggs due to the adhesion of the eggs.

(2) Artificial induction of spawning: commonly seen in fish farms

A. Injection of oxytocin: Use 600-1000IU of artificial chorionic gonadotropin (HCG) or 30-50 micrograms of luteinizing hormone-releasing hormone analog (LRH-A) per kg of female fish, or use them in reduced doses and mix them. The dose for male fish is halved. Generally, inject the predetermined dose into the chest cavity at the base of the pectoral fin at 6 pm on a sunny day, then move to the spawning pool and add fresh water for half an hour. After 6-15 hours when the water temperature reaches 18℃, spawning can begin (the higher the water temperature, the shorter the effect time, and vice versa).

b Spawning and fertilization: After induced spawning, the broodstock can spawn in the pond by themselves, using the same method as (1). If artificial egg collection is required, the broodstock can be picked up before the fish dies, and the water from the fish body can be wiped off with a towel. The eggs can be squeezed into a dry porcelain basin and quickly squeezed into the water. Stir with a feather to allow them to be fully fertilized. Then the fertilized eggs can be evenly spread on the fish nest and placed in the hatching pond for incubation. Alternatively, the broodstock can be debonded with talcum powder solution and then incubated in running water. When the water temperature is 16-22℃, the fry will emerge in 3-5 days.

3 Management:

(1) Natural hatching: 300,000 to 500,000 fertilized eggs are placed in each acre of pond. The eggs should be placed together on the same day to ensure that the fry are of uniform size. Special attention should be paid to preventing Saprolegniasis. 0.3‰ can be used......>>

Question 7: How to raise ornamental red carp? Koi is a general term for carp whose body color, patterns and body shape have ornamental value. Its biological characteristics are basically the same as those of ordinary carp.

The original species of koi is red carp, which is said to have originated from the koi in Longzhou, Guangxi, China, the red carp in Xingguo, Jiangxi, and the golden carp in Hangzhou, Zhejiang. After long-term artificial selection and cultivation by the Japanese, it became the current koi. In terms of color and pattern, there are now more than 100 varieties and 13 categories. According to historical records, around 1804-1829, that is, 170 years ago, Japanese nobles first put koi in the pond for viewing. Koi has a strong personality and a vigorous swimming posture. It has a calm and fearless demeanor, and will not struggle even if it is placed on the chopping board. Therefore, the Japanese regard koi as the national fish. In 1973, Japanese koi, as a friendly envoy between the Chinese and Japanese people, settled in my country. Koi originated in China, flourished in Japan, and returned to China. At present, koi has been loved by more and more people in China, and is called good luck fish, Feng Shui fish, living gem in the water, and the king of ornamental fish. Koi has a record of living for more than 200 years and is regarded as a symbol of friendship, peace and auspiciousness. It is a kind of noble entertainment and beautiful enjoyment.

Koi carps become savvy after long-term care, and are gentle and peaceful. After training, they can recognize their owners and get close to people. They are really cute. Raising koi carps can make people forget the hard work in their careers and lead you into a paradise of paradise with endless fun.

As long as you have some common sense, raising koi is not difficult.

1. Selection and configuration of aquarium

Koi are large and active, so the aquarium should not be too small. It should generally be 120*45*45 (cm) and hold about 200 liters of water. It should also be equipped with a filter and an aerator. Some filters come with an aerator, which is more convenient.

2 Water temperature control

Koi is a wide-temperature fish. The suitable water temperature is 5-30℃, and the most suitable temperature is 21-27℃. However, Koi cannot adapt to the rapid change of water temperature. If the temperature difference is more than 3-5℃, Koi will get sick. Koi is suitable for weakly alkaline water with a pH value of 7.2-7.4, and the water has low content of iron ions, chloride ions, sulfate ions, etc., sufficient dissolved oxygen, and low hardness.

3 Feeding

Koi is an omnivorous fish. It eats mollusks, fragments of higher aquatic plants, benthic animals, and even tiny algae or artificial synthetic pellets. It is best to feed artificial synthetic pellets and baits. Bean cakes, vegetable cakes, bread crumbs, fish worms, clams, crab meat, duckweed, etc. are also acceptable. Be careful not to feed too much. Koi are relatively greedy. If you feed too much, you will suffer from food accumulation or constipation. Therefore, you should pay attention to the amount and frequency of feeding, and follow the principle of feeding small meals frequently, no leftover bait, and no water damage.

But if you want the koi to be brightly colored, in addition to the lighting, background and water quality, it is more important to feed the koi with highly nutritious special synthetic baits containing astaxanthin and other natural color enhancers, which is beneficial to the koi's color enhancement.

Bait can be placed alone or alternately. For hatched young fish, you can initially feed them rotifers, water fleas or egg yolks. Small fish of about 2 cm should be fed with baits such as bloodworms. For fish that grow to more than 5 cm, they can eat any animal or plant bait.

4 Water quality

Koi require higher water quality conditions, preferably neutral water pH 7-7.5. If the aquarium is dirty and white, it is easy to cause fish diseases, so attention should be paid to the cleanliness of the water.

5. Do not mix

Koi is a large ornamental fish, and its habits are quite different from other ornamental fish. Different species of fish are not harmonious when kept together, so it is best not to keep them together with other fish.

Question 8: What are the methods for raising red carp? What are the techniques for raising koi (that is, red carp)?

1. Stocking density

Before raising koi, you must first consider the size of the breeding container and the number of koi that can be accommodated. The main attraction of koi is its gorgeous colors, strong body shape, elegant movements and beautiful swimming posture. Koi are best viewed from the back, that is, from above. They are much less attractive if viewed from the side. To fully meet these conditions, only garden ponds can be used for breeding. However, as urban residents, not everyone has a garden, so an aquarium is used instead. Regarding the breeding density, it should be adjusted in combination with the size of the container, water volume, water temperature, oxygenation status, fish size and growth conditions.

2. Variety matching

When raising koi in a garden pond, they are usually matched with red and white, Taisho Sanshoku, Showa Sanshoku, gold or platinum, autumn water, light yellow, etc. In an aquarium, people can only see the side of the koi, so they can choose koi with reflective fish bodies, such as gold, platinum gold, Matsuba gold, Yamabuki gold, etc., and then match them with German carp. But whether it is raised in a pond or an aquarium, most of the koi are brightly colored, supplemented by darker, shiny and elegant ones.

3. Feeding method

Koi are omnivorous fish, and can be fed with animal or plant baits, such as water fleas, water worms, shrimps, corn flour, biscuit crumbs, instant noodle crumbs, vegetables, and even rice balls. But if you want Koi to be colorful, in addition to the lighting, background and water quality, it is more important to feed them with highly nutritious special Koi color-enhancing artificial feed, which comes in flakes or granules.

Bait can be placed alone or alternately. Koi are quite greedy. If they are fed too much, they will suffer from indigestion or constipation. Therefore, you should pay attention to the amount and frequency of feeding, and follow the principle of feeding small meals frequently, without leftover bait or spoiled water.

For hatched young fish, you can initially feed them rotifers, water fleas or egg yolks. Small fish of about 2 cm should be fed with baits such as bloodworms. For fish that grow to more than 5 cm, they can eat any animal or plant bait.

Question 9: How to raise red carp? 1. Fish pond construction

Ponds should be built in humus soil, with a leeward and sunny terrain, sufficient water sources (preferably spring water rich in mineral elements), and convenient drainage and irrigation. For domestic koi, you can use the courtyard space or roof to build a pond. The broodstock pond area is 30-40 square meters, the pond depth is 1.5-2 meters, and the water depth is 1.2-1.5 meters. The spawning pond is 15-20 square meters, the pond depth is 1.5 meters, and the water depth is 1-1.2 meters. The hatching pond is 3-5 square meters, the pond depth is 0.8-1 meters, and the water depth is 0.6-0.8 meters. The seedling pond is 10-15 square meters, the pond depth is 0.5-0.6 meters, and the water depth is 0.4 meters. The area of ​​the adult fish pond depends on the amount of breeding. The larger the area, the better. The pond depth is 1.5-2 meters and the water depth is about 1.5 meters. It is best to build a cement pond with the bottom layer tilted toward the drain outlet. Before using a newly built cement pool, remove the alkali first, add rice straw or wheat straw after it is filled with water, soak for about 15 days, drain the pool water, rinse it with clean water several times, and then add new water for use.

2. Propagation and seedling cultivation

The breeding age of koi is generally between 3 and 10 years old, and the weight reaches more than 1.5 kg. Choose koi with strong physique, crystal color, obvious breed characteristics, steady swimming posture, and no disease or injury as broodstock. Around May every year, when the water temperature is stable above 16℃, male and female koi can be selected in a ratio of 1:3 and put into the spawning pond, and the spawning pond is pre-placed with disinfected fish nests. After spawning, remove the broodstock and transfer the eggs to the hatching pond. The fry will hatch after 5-7 days. The fry will begin to float to the surface of the water to find food 3-4 days after hatching. At this time, the fry should be immediately taken to the seedling pond. Use cooked egg yolk, soy milk, algae, soft worms, etc. as bait. After 1 week, feed water fleas, bloodworms and chopped earthworms, etc., and appropriately supplement artificial compound feed, feeding once a day on the upper and lower sides. When the fish grows to more than 2 cm, it can be moved to the adult fish pond for breeding.

3. Feeding and management of adult fish

Koi have a large appetite, so it is better to keep them at a sparse stocking density. For large cement ponds, 3-5 fish per square meter is appropriate, and they can be mixed with grass carp, silver carp, bighead carp, etc. as appropriate. Koi is an omnivorous fish. Leftovers, leftovers, fruit peels, etc. can be mixed with about 10% animal viscera, golden apple snails, maggot pupae, earthworms and other animal feeds to make pellets for feeding. The protein content of its feed should be about 35%, and the fat should be 5%-8%. The "four fixed" feeding should be adhered to, generally feeding twice a day, once in the morning and once in the afternoon. The feeding amount depends on the water temperature, weather changes and the fish's feeding situation. It is roughly 2%-10% of the fish's body weight, and it is best to eat it within 20-10 minutes.

Inspect the pond every day and remove the leftover bait in time. Change the water every 2-3 days in summer and every 4-5 days in spring and autumn. The amount of water to be changed is 1/3-1/2 of the original pond. Keep the water fresh. In hot and rainy weather, pay attention to oxygenation to prevent flooding. In winter, koi can be moved indoors, the indoor water temperature is kept at 2-10℃, and easy-to-digest bait is appropriately fed to ensure safe wintering.

4. Disease prevention and treatment

Koi are very resilient and rarely get sick, but the breeding pond and fish bodies must be disinfected. Apply quicklime, trichlorfon, etc. regularly, and sick fish should be diagnosed and treated in time. The treatments for common diseases are as follows:

1. Enteritis. Sick fish have reduced appetite, slow movements, often swim alone, black body, swollen abdomen, bulging and swollen anus, and yellow-red ascites flows out when the abdominal wall is squeezed. For prevention and treatment, add 0.2g sulfaguanidine per kilogram to the bait and feed it to sick fish for 5 consecutive days. For fish with severe disease and no food intake, 500-1000 international units of kanamycin can be injected intraperitoneally for 3-5 days.

2. Saprolegniasis. Grayish-white, cotton-like hyphae parasitize on the body or fins of diseased fish. Oral administration of vitamin E, 0.4-0.6 grams per 10 kg of fish weight per day, can enhance resistance. Diseased fish can be sprayed with a mixture of 400-500 mg/L salt solution and 400-500 mg/L sodium bicarbonate solution.

3. Scale erection disease. The body surface of the diseased fish is rough, the scales stand upright, and the scale base is edematous. Prevention and treatment methods: ① Soak the fish body in 2% saline solution for 5-15 minutes, once a day, for 3-5 consecutive days. ② Oral administration of sulfadiazine: First, keep the diseased fish in 0.5% saline, stop feeding for 2 days, move to clean water, and feed 0.2 grams per fish, once every other day, for 5 consecutive times.

4. Ichthyophthirius. There are white spots on the body, fins and gills of the diseased fish. In severe cases, the skin and fins of the diseased fish are covered with white spots and white mucus. You can use 10-15 mg/L formalin plus 1-2 mg/L methylene blue to spray the whole pond, once every other day, and use it 2-3 times in a row......>>

Question 10: What should I do with the red carp I raise when traveling? If it is a fish raised at home, it is fine as long as the travel time is not long. You will not be away for more than a month. If there is a filter or an oxygen pump, turn it on and feed it a little before leaving. If there is no filter, change the water before leaving so that the water will not be so muddy. As for feeding, as long as you are not away for a month, feed it once before leaving for a week or two, and it will not starve to death. If conditions permit, put some live shrimp in the fish tank and let it catch it by itself. I usually put some live shrimp when I am away for more than a week, and I don’t care if it is less than a week. It won’t have any effect if it is hungry for a few days, and it won’t die.