What kind of food does koi eat?

The origin of carp is Central Asia and West Asia, and later spread to China, and it is introduced to other countries from China. It is mild in nature, likes to swim in groups, is easy to raise, has strong adaptability to water temperature, and the koi is still omnivorous fish, and the food requirements are not too strict. It is very suitable for the majority of enthusiasts to raise. Let's take a look at what kind of food koi eat.

The living habits of Koi

Koi is suitable for living in a slightly alkaline and low hardness water environment. Like goldfish, they do not have strict requirements for water temperature and water quality, and have strong adaptability to the environment. The most suitable water temperature is 20-25 ℃. In this temperature range, koi have a strong appetite, active swimming, strong physique and bright colors. They can also survive in the scale of 2-30 ℃ of water temperature, but they can not tolerate the sudden change of water temperature. Under the condition of artificial culture for a long time, koi can endure when the temperature difference is 2-3 ℃. Once it exceeds this scale, it will simply cause abnormal behavior and some diseases of koi. For example, when the temperature difference is 7: 8 ℃, the koi will crawl underwater without eating and motionless, and the temperature difference continues to increase suddenly, then all you can do is to quietly wait for the sudden death of the koi.

What kind of food does koi eat?

Koi is an omnivorous fish. generally speaking, molluscs, benthos, fragments of advanced aquatic plants, and even tiny algae can be used as food for koi, and they can also extract some food from the pond sediment. With the growth of fish and the change of seasons, their feeding conditions also change. Koi has the greatest feeding intensity in summer, while it simply does not eat at all in winter. The newly hatched larvae are mainly fed on rotifers and small cladocera, while those above 3 cm are fed on benthos, insect larvae, shellfish, snails and fragments of advanced aquatic plants.

Koi adapt to fish food on a wide scale, and the demand for living conditions is not very strict, so its vitality is strong. Of course, now synthetic fish food is also the first choice to feed koi, and it is also very rich in nutrients. make the koi healthy, beautiful and energetic.

Feed types of koi

1. Plant feed: of course, animal feed is the most ideal feed for koi, but when there is a lack of animal feed for a variety of reasons, plant feed can be used as an auxiliary feed for emergency or life maintenance. The common ones are Wuping, aquatic plants and so on, among which Wuping is one of the smallest species of seed plants. The rhizome of the plant is as small as sand, and the nutrient composition is good. The other is duckweed, which has a thin filamentous root, and koi should be eaten when they are hungry. Generally, they can only be fed to larger koi, but not more. Check carefully for pests and eggs before feeding, or soak them in low concentration potassium permanganate solution for a while and then feed them, otherwise it is easy to bring in germs and pests.

2. Animal feed: animal feed is one of the most favorite and most nutritious feeds for koi.

① fish insects: fish insects, commonly known as red insects, water fleas, etc., are zooplankton breeding in sewage pits, ponds and rivers, and are commonly known as all kinds of water fleas.

② Cyclops: sword water flea body is bluish gray, is a crustacean copepod, the advantage is strong vitality, swimming fast, can not die for a few days, but the disadvantage is small, if used to feed several years of old color, because swimming fast, it is more difficult to hunt, and cyclops can also bite small fish fry, so, when feeding Cyclops, it is best to use boiling water to scald.

③ paramecium: paramecium, commonly known as ash water, is a common name for several protozoa in plankton. It can be cultivated with straw and is most suitable for feeding newly hatched fish fry.

④ wiggler: the south is called the blood worm, the north is called the oil jump, is the chironomid larva, the body color is blood red, so it is called the blood worm, its nutrition is rich, the price is also relatively expensive, is not easy to preserve, needs to be refrigerated, and the general enthusiasts directly feed it after freezing.

⑤ water earthworms: there are many kinds of water earthworms, water vermis koi favorite, rich in protein, fat and vitamins, generally live in fertile rivers or running water sewer sludge surface, one end extends into the sludge, the other end swings with the water, its body is small, soft, bright red or crimson, easy to be swallowed by koi, but it must be rinsed repeatedly before feeding, and if conditions, it must be kept for a few days Water earthworms spit out the mud before feeding it.

3. Synthetic feed: to develop the koi breeding industry on a large scale, fishing for natural bait fish and insects alone cannot meet the needs. In addition to artificial cultivation of fish and insects, it is also necessary to develop the production of compound pellet feed and supply the market. On the one hand, it can solve the feed source of the farm, on the other hand, it can also meet the needs of koi lovers' families to raise and play koi. With artificial feed, it is much more convenient for families to raise koi. Pellet feed requires a complete range of nutrients, which meets the needs of growth and development of koi. The main ingredients should include protein, sugar, fat, inorganic salts and vitamins.

① protein: protein is the main component of the body of koi. Its function is to grow new tissue and repair old tissue. It is also a component of heat supply. There must be enough protein in the diet to promote the rapid growth of koi.

② sugars: sugars are the main substances of heat energy in koi and the main feed components of koi.

③ fat: fat is the food that stores the highest amount of heat energy. It has the same physiological function as sugar, oxidizing and supplying energy in the body. Generally speaking, the lack of fat in the feed, the growth of koi is slow and small, which will reduce the tolerance of fish to low temperature and hypoxia, and it is easy to cause death when overwintering, too much fat and fat, which will hinder the development of gonads.

④ inorganic salts: inorganic salts are the main elements that make up colored bones, such as calcium phosphate and calcium carbonate. The blood and muscle blade of fish also contain a certain amount of calcium and phosphorus. Feed contains a certain amount of calcium and can promote digestion and help the absorption of fat and phosphorus. In addition to getting calcium and phosphorus from feed, koi can also infiltrate calcium and phosphorus into the body through skin and gills. Koi also needs trace elements such as iron, copper, magnesium, sodium, potassium and diamond. Without these elements, they will grow slowly and cause disease. In order to ensure the normal growth of koi, the feed should contain these elements.

⑤ vitamins: vitamins are also essential for the growth of koi. Long-term lack of vitamins, fish dysplasia, slow growth or complete cessation, and even deformities, reduced resistance to external adverse environment and various fish diseases. Lack of vitamin A, will cause fin cracking, fish body pigment disappear, body color lighter, not bright, lack of vitamin E, will make gonadal dysplasia or non-development, at the same time, the resistance to aquatic fungi is reduced, adding a small amount of vitamin B12 to the feed can promote growth.