CATDOLL : CATDOLL: The growth rate of eels raised with earthworms (What is the growth rate of eels raised with earthworms)

1. How big can the eel grow in a year?

1. The growth rate of the eel is relatively slow, and it can only grow to about 4 taels or half a pound in a year, which is less than 30 centimeters. The reproduction of the eel is quite special. It is female when it is young, and turns into male after reproduction once. This female-male transformation phenomenon is called sex reversal.

2. The life span of eels is generally about 6 years, and a very small number of eels can live for 10 years. In the natural environment, there is basically no eel that can live more than 10 years. The life span of artificially cultivated eels is longer than that of wild eels, and there is a certain chance that it will exceed 10 years. Eels are tropical and warm temperate fish, bottom-dwelling fish, with strong adaptability, living at the bottom of the water body, mainly in muddy waters such as rice fields, lakes, ponds, rivers and ditches.

2. What is the growth effect of eels fed exclusively with earthworms? Thank you?

After being air-dried, earthworms contain 70% protein, 7.9% crude fat, 14.2% carbohydrates, vitamins, alkaloids and a variety of digestive enzymes. The protein contains a variety of amino acids and trace elements required for the growth and development of animals, so earthworms are the best bait for eels.

Feeding eels with earthworms is a good way to eat, digest and resist diseases. However, it is important to feed them at regular times, fixed locations, with fixed quality and quantity. Adding 5% to 8% fresh earthworms to eel feed can increase the eel's growth rate by about 20%.

3. How long does it take for a rice field eel seedling to grow to one kilogram?

Two years

If the temperature of the eels is well controlled and the nutrition is adequate, it will not be a problem for them to grow to one kilogram in two years. However, the eels that are popular in the market are generally around 3-5 taels in size, and large eels over one kilogram are rare.

Under the premise of ensuring sufficient supply of bait, the growth rate of eel fry is very fast. The length of newly hatched eel fry is 12 mm to 20 mm. The fry 4 to 5 days after hatching mainly feed on earthworms, rotifers, small water fleas, fresh fish paste and algae, with earthworms and water fleas being the best.

By the 15th day, the body length is 27 mm-30 mm. After one month of feeding, the eel fry can grow to 51 mm-53 mm. By mid-November, the eel fry has grown to 150 mm-240 mm. As the temperature drops, the young eels will burrow into the mud to hibernate and stop growing.

4. How many pounds of earthworms are needed to grow one pound of eel?

Yellow eel grows very fast, and it takes about 3-3.5 kilograms of earthworms to grow one kilogram

5. What is our management method for the joint breeding of eels and earthworms?

It is best to feed mixed feed.

1. The value of earthworms is high. We already know that the cost of artificially breeding earthworms is about two yuan per kilogram. According to experiments conducted by experts from Sichuan Agricultural University, when feeding eels with wild earthworms, 6-7 kilograms of earthworms are needed to make the eels gain 1 kilogram (because the intestines of wild earthworms are large and the earthworms contain more impurities). The Dazhong Breeding Company uses artificially bred Daping No. 3 earthworms to feed eels, and about 4 kilograms of earthworms can make the eels gain 1 kilogram. It can be seen that the cost of using self-bred earthworms to feed eels is about the same as using feed (about 8 yuan per kilogram). If the earthworms are calculated according to the market selling price (10 yuan per kilogram), the cost of breeding 1 kilogram of eels can reach 40 yuan. That is to say, if earthworms can be sold at a price of more than 10 yuan per kilogram, we might as well breed earthworms directly for sale (because feeding eels with them does not have the effect of increasing value again).

2. Compared with compound feed, the nutrition is still not comprehensive enough. Earthworms are very rich in protein, which can basically meet the growth needs of aquatic products such as eels. Therefore, if eels are fed with earthworms, they will grow faster. However, earthworms are mainly rich in protein, and many nutrients are not balanced. Therefore, we should also provide some other nutrients to ensure that the protein can be fully utilized, just like beef is a good high-protein food, but we can't just eat beef, we should also eat something else. Therefore, we have formulated a more comprehensive nutritional compound feed for farmed animals, so that we can achieve faster growth and higher feed conversion rate, thereby reducing feed costs. Earthworms can only be used as protein feed, and we can supplement other nutrients by using fish feed in combination.

3. It is best used as an attractant. We know that eel farmers in Hubei and other places purchase earthworms at high prices for eel breeding, up to 15 yuan per kilogram. We calculate that 4 kilograms of earthworms grow 1 kilogram of eel, and the cost of raising eels per kilogram is more than 60 yuan. Such a high breeding cost is definitely a loss, so why do they still use it? The reason lies in the special attractant effect of earthworms. Using earthworms to tame eels can make eels accustomed to eating compound feed in a very short period of time (generally 3 to 5 days), and their overall feed intake is more than 30% greater than that without earthworms. Although the cost is high, short-term high-cost breeding can be exchanged for exponentially increased benefits. Therefore, it is most cost-effective to use earthworms as attractants. Of course, if you have a lot of earthworms and there is no reliable market for the time being, it is still good to use them to feed eels, but it is still more cost-effective to use them in combination with feed.

6. How big can an eel grow in a year by eating earthworms?

In addition to eating earthworms, eels also eat small fish and shrimps. If they only eat earthworms, they can grow 78 taels a year.

7. How long does it take for the eel to grow to more than 3 taels?

It takes about 20 to 40 days to grow to 300 taels. It depends on the breeding experience. Generally, 3×8 square meters can breed 800 to 1,000 fry. After they grow to 300 or 400 taels, they are divided into ponds according to the specific situation. There is no specific standard.

Wild eels grow slowly, and can only grow to about 100 grams or 0.5 kilograms a year, less than 30 centimeters. The eel's reproductive conditions are quite special. It is female when young, and turns into male after reproduction once. This female-male transformation phenomenon is called sex reversal.

8. How long does it take for an eel to grow to half a pound?

Generally speaking, it is impossible to grow wild worms for three to five years. If you want to raise them at home, you have to choose strong and healthy seedlings, buy food and feed them with earthworms. You can get about half a pound a year. Some people raise them here, and they are all more than half a pound. They are all sold to big restaurants in foreign countries. I heard that they sold them for more than 100 yuan per pound last year.

9. How much can a 20-pound eel seedling grow in 45 days?

Generally speaking, a 20-jin eel can grow to about 35 jin in 45 days.

Because its feed intake is different, so its growth is also different.

Take fish paste as an example. If it is pure fish paste, a 20-jin yellow eel can eat about 8 liang a day, and its weight can increase by about 2 liang. If 50% of yellow eel feed is added, its weight can increase by about 3 liang a day.

If fed with natural active baits such as earthworms, water worms, maggots, etc., it can gain about 4 taels of weight every day.