Scientific culture techniques of koi identification and control of common fish diseases in koi

With the continuous improvement of people's quality of life, many people will raise some plants and animals at home, the most common of which is koi, because koi not only looks very beautiful, but also has a good meaning. However, koi is still a bit difficult to raise, because koi sometimes get sick. Today, I will briefly tell you something about the scientific methods and techniques of koi breeding.

Scientific culture technology of koi

1. Stocking density. Koi has a large food intake, so the stocking density should be appropriate and not too large. Usually, the size of the fry exceeding 10cm is about 2 to 5 per square meter, and the breeding density should be appropriately reduced with the growth of fish.

2. Feed. At present, koi culture is mainly fed with artificial formula feed, which contains more than 35% protein. Domestication is usually adopted when feeding, so as to make it develop the habit of floating and grazing for food.

3. After the completion of domestication, appropriate amount of bait should be added according to the fish size, water quality conditions and climate conditions to ensure that it can be eaten around 30min each time, and the daily feed volume generally reaches 5%-6% of the fish body weight. In spring and autumn, once a day at 7: 8 and 14: 15, respectively; in summer, at 6: 00 and 15: 16, respectively; in winter, usually reduce the feeding times or stop feeding.

Identification and control of common fish diseases in brocade carp

1. Enteritis. Diseased fish have loss of appetite, slow action, often swim alone, the body surface is black, the abdomen is obviously dilated, the anus is red and swollen and protruding, squeezing the abdominal wall will flow out yellow-red ascites. At this time, 100mg sulfamethoxazole can be added to the diet according to each kilogram of body weight for 5 consecutive days, note that the dosage can be doubled on the first day, or fed with garlic powder.

2. Water mildew. There are gray-white hyphae such as cotton floc on the fin or body surface of diseased fish. At this time, the fish can be directly given 0.4-0.6 g vitamin E per 10 kg body weight, which can improve the resistance, while the diseased fish should be sprayed with a special solution composed of 400~500mL sodium bicarbonate solution and 400~500mL salt solution.

How long is the lifespan of koi

1. The average life span of koi is about 70 years. Koi, also known as the original breed of red carp, is the red carp. As an ornamental fish, red carp was very popular in the Ming Dynasty. It is said that koi carp originated from Longzhou koi in Guangxi, Xingguo red carp in Jiangxi and golden carp in Hangzhou, Zhejiang. It was introduced into Japan from China in the early stage, and then it has been artificially selected by the Japanese people for a long time. Now there are more than 100 species.

2. According to literature records, Japanese aristocrats first put koi in ponds for viewing, and it is rare for ordinary people to see them. At the initial stage, they were called "scarlet carp", "color carp" and "flower carp", but they were renamed "koi" after World War II. As a friendly emissary of the Chinese and Japanese peoples, Japanese koi settled in China in 1973. The "carp flag" is also hung on the Boys' Day in Japan, which shows that the Japanese people love koi.

3. Koi originated in China, flourished in Japan, and then returned to China, which can be said to have experienced the process of "export to domestic sales". Nowadays, koi is loved by more and more people for its unique masculine beauty, so that it is known as "king of ornamental fish".

How long will it take the brocade carp to grow up?

The main results are as follows: 1. Koi can lay eggs in adulthood after 2 years. Koi has a strong physique, bright colors, changeable patterns and heroic swimming posture, which has high ornamental and feeding value. Its body length can reach 1.5 meters, and its life span is extremely long. It can live for 60 years (according to legend, the 200-year-old koi). It means good luck and is said to bring good luck to its owners. it is a popular fengshui fish and ornamental pet.

2. Koi has strong adaptability to the environment, and the adaptive temperature is 2-30 ℃. However, it can not resist the sharp change of water temperature. When the temperature drops suddenly or rises by 2-3 ℃, it is easy to get sick. If the temperature rises and falls by 7-8 ℃, the fish will crawl on the bottom and do not eat or move. If the temperature change is greater, the koi will even die immediately.

In the above, I briefly introduced some scientific breeding techniques related to koi, as well as the identification and prevention of common diseases of koi. I hope these can help you. If you have friends who raise koi at home, you must always pay attention to the status of koi. In fact, this can also be very good and play a preventive role.