In fact, there should be many answers to this question, because the growth rate of fish is different because of different growth methods and different environments.

In the water and fertilizer areas, there are many microorganisms, and fish are not short of food, so they must grow rapidly.

In areas with thin water bodies, fish will grow slowly if they lack food and have nothing to eat.

In addition, the varieties of crucian carp can also be divided into local crucian carp, Fangzheng silver crucian carp, Pengze crucian carp, Gaobei crucian carp, Xiangyun crucian carp and so on. Some of these crucian carp can grow 2 kg a year, and some may not have 1 kg in five years.

Generally, local crucian carp grow very slowly. One-year-old crucian carp may not grow up to 2 Liang at most. It is also a problem to have a kilo in five years, mainly because the wild environment is too complicated and food is scarce.

Founder crucian carp is native to founder county, Heilongjiang Province, and has the characteristics of high meat yield, cold tolerance, strong disease resistance, fast growth and large size. The biggest crucian carp can reach 3 kg, and it grows very fast.

Pengze crucian carp is native to Dingjiahu, Fanghu and Taibo Lake in pengze county, Jiangxi Province. Pengze crucian carp is large, with a maximum weight of 6.5 kg. Also known as Pengze crucian carp.

The high-backed crucian carp in Dianchi Lake is spindle-shaped. Carassius auratus originated in Dianchi Lake, Yunnan Province. It mainly feeds on humus and nutrient debris, which can clean up impurities at the bottom of the water and absorb some algae, which has a good purification effect on the water body. The largest individual can reach 3 kg.

Xiangyun crucian carp, also known as engineering crucian carp, is a triploid crucian carp successfully cultivated by China Academy of Engineering and Professor Liu Jun from the Biology Department of Hunan Normal University. The growth rate is 3-5 times that of common crucian carp, and the fry can reach more than 3 kg in that year.

In addition, when our fishing friends fish, they will think that the big crucian carp is the "engineering crucian carp". Actually, this statement is wrong. Many species of crucian carp have little difference from engineering crucian carp and grow very fast. Except for the slow growth of local crucian carp. Many crucian carp can grow very big.

Fishing friends, how big do you think the crucian carp over there can grow and how long it will take?

How young can this grow?

I caught it in a pond of about three acres (the reservoir in the village) surrounded by three mountains halfway up the mountain. 30cm at the bottom of the bucket! I didn't know what fish it was when I caught it. The scales are big and look like crucian carp, but I am not sure! Because it's big, I've never seen such a big one, one is about two pounds! The smaller one is about a kilo! Total * * * 5,3.9 kg [yi tooth] [yi tooth] [yi tooth]

Crucian carp grows very slowly, especially the "primary crucian carp" can grow to a catty. I wonder how many years it will take. After so many years of wild fishing, half a catty of wild crucian carp is rare, and it is even more rare to meet 1 catty of local crucian carp.

But some kinds of crucian carp can grow very big, such as engineering crucian carp and high-backed crucian carp.

Although there are many kinds of crucian carp, their living habits are basically similar. They are used to living in the lower water and belong to the bottom fish.

Wild crucian carp can grow to tens of grams a year, which is about 1 2. If it is in a small lake or reservoir with abundant natural bait and water quality, it can grow 2-3 A Liang a year. If it can grow to a catty, it is still a question whether it can grow to five years.

Although the growth of crucian carp is slow, its reproductive ability is very strong, and it usually lays 10,000 eggs at a time. Low temperature tolerance, and still have feeding ability in water temperature below 10 degrees Celsius. This is why our fishing friends can still catch crucian carp in winter fishing.

Crucian carp has strong adaptability to the environment. The protective color of its scales can change with the change of water color, and it can change into silver gray, taupe, gray, silvery white, yellow and golden yellow according to the color of water.

Even with the change of living environment, its body shape can be changed appropriately. If it lives in a narrow pond with a small range of activities, it will become shorter, wider and fatter. If it lives in flowing water, its body shape will become longer.

How long can crucian carp grow to 1 kg? It depends on what waters and latitudes.

Wild crucian carp grows slowly. In Northeast China, the effective growth period of crucian carp is 1 year, that is, 7 to 8 months. In other months, because the water temperature is too low, crucian carp eat very little, so it is good not to lose weight. In the waters with sufficient food, 1 kg crucian carp will take at least 7 or 8 years. In the south, although it can be eaten all year round, it takes about 1 and 2 months to stop gaining weight and growing in winter, and it takes 5 or 6 years to grow to 1 kg.

The sexual maturity of crucian carp generally takes two years and weighs about 20 grams. Then the growth of crucian carp becomes slow, 1, 50 grams of crucian carp takes at least three years. But almost all fish have a characteristic, that is, they are growing all their lives, that is, they are increasing their length and weight all their lives; So as long as the crucian carp is given enough growth time, it can grow to several kilograms or even more than ten kilograms. Why does crucian carp grow big in Dashuiku? The reason why crucian carp can grow for a long time is because the water surface is large and it is not easy to catch fish!

It is difficult for local crucian carp to grow to a catty. It's good to grow to two taels a year. In the past, no one specially raised crucian carp, so the output was too low and there was no economic benefit. However, crucian carp is very popular with people. Whether eating or fishing, it is the best fish species. Therefore, aquatic researchers began to artificially cultivate new crucian carp varieties. That is what we now call "engineering crucian carp".

If I remember correctly, the Japanese should have cultivated a new generation of crucian carp at the earliest, called "Silver Crucian Carp". The body color is silvery white, the body is slender, the scales are tight, the head and mouth are small, and it can grow to about one kilogram a year.

The earliest domestic crucian carp should be high-backed crucian carp. The female parent of Gaobei Carassius auratus is Carassius auratus from Shuangfeng Reservoir in Heilongjiang, and the male parent is red carp from Xingguo, Jiangxi. This hybrid crucian carp has strong body, wide back, thick meat, compact meat, rapid growth and strong adaptability. It can grow to more than one catty a year. Due to the genetic genes of carp fathers, individuals can be very large, which breaks through the upper limit of common carp to grow to eight or two pounds, and can grow to two or three pounds, and even some individuals can reach about six pounds. Therefore, high-backed crucian carp is widely cultivated in China and flows into natural waters.

There is also a kind of Pengze crucian carp, which is plump, silvery and soft. Breeding can reach about 821 Jin a year.

There is also a kind of crucian carp in Hubei, which can grow to about eight taels or a catty a year. Because of the low price, it is also launched in many places.

Personal experience: Among these kinds of crucian carp, native crucian carp is relatively responsible and basically in the bottom activities. Although the high-backed crucian carp and Pengze crucian carp also float, the big ones mainly move at the bottom. The local crucian carp, high-backed crucian carp and Pengze crucian carp have stable swimming layers and are relatively easy to catch. But silver crucian carp and Hubei crucian carp are hard to ponder and fish.

How long does it take for crucian carp to reach a catty?

There are two kinds of crucian carp, one is wild and the other is cultured. Whether it is wild or cultured, its growth rate has a great relationship with geographical location and water conditions. There is no precise definition of this.

For example, the crucian carp in the north rarely eats outdoors under the cold ice in winter because of the climate, so it grows slowly. The water surface is basically not frozen in the four seasons in the south, and the water temperature is relatively high. Carassius auratus will look for food when it is active, so it grows to a catty faster than in the north.

The water area basically depends on the size, water quality, fish density and food quantity of the water area. The quality of water quality has a great relationship with the health of crucian carp. Good health, moderate fish density and abundant food make crucian carp grow fast. If the water quality is poor, there is less food and more fish, then the natural crucian carp will grow slowly.

It takes about 5 to 7 years for wild crucian carp to grow to a catty. It is basically 6 to 8 months to raise crucian carp. Why is crucian carp raised so fast? Everyone knows about economic fish.

I caught it this spring, with a picture of 0.9 kg, followed by the biggest one in an afternoon.

First of all, it depends on the living environment of fish. After all, there is nothing to eat, and no matter what species it is, it will not grow up.

It's hard to stop it from growing in fertile water with a lot of plankton. No matter what crucian carp grows fast, if there is enough food, it will take about two years.

Carassius auratus is generally divided into soil crucian carp and engineering crucian carp. Like the drinking water reservoir in our village, it belongs to mountain reservoir with clear cold water. The transparency of water is several meters, and the fish in it generally have nothing to eat. The crucian carp caught has a great feature, and its mouth is very short and flat. It is estimated that crucian carp can't grow to more than a catty in this water body for more than seven or eight years.

Generally speaking, it takes four or five years for crucian carp to grow to more than one catty, except for a kind of crucian carp called engineering crucian carp. This is a hybrid crucian carp, which can grow to three or four kilograms a year, but the shortcomings are also obvious, that is, the meat is rough and the taste is poor.

Crucian carp is a very common aquatic product in our daily life, and pregnant women use it as a secret weapon for milking. The weight of crucian carp in supermarkets is generally about half a catty to one and a half catty. In aquaculture, how much it costs to reach a catty of crucian carp is a concern of many people.

First of all, we should know that the growth rate of crucian carp is closely related to light intensity, food content in water, species of crucian carp and density of similar species in water.

As far as environmental factors are concerned, the light intensity is sufficient and the water is rich in food. The growth rate of crucian carp can be about half a catty a year, and it can reach a catty in two years.

If you consider the variety and culture of crucian carp, there is a big difference. As far as the species of crucian carp are concerned, an engineering crucian carp cultured artificially can reach 10 kg in three to five years, which is almost the growth rate of more than two kg a year. As far as farming methods are concerned, if farmers only consider the weight of crucian carp, regardless of the quality of crucian carp, they can raise crucian carp in one year.

Summary: In general, the growth rate of crucian carp is about one and a half kilos, which can reach one kilo in two years. But because of the existence of environmental and human factors, this growth rate can be improved.