Can large electric eels be reared in aquariums?

Hello. To tell you the truth, you can raise. But it is extremely dangerous, and it cannot be taken out again until it is put in the aquarium and died, because whoever is the conductor is difficult to clamp with a wooden clip if you are sick. In a word, it is difficult to raise.

It's dangerous, water is a conductor, but you can keep it if you pay attention to your own safety.

Yes, but novices should never raise it.

The quality of water is the basic condition that determines the construction of an eel farm. Therefore, the water quality of the water source must be checked from the physical, chemical and biological aspects to determine whether it is suitable for the habitat and growth of eels.

1 Water temperature: Changes in water temperature directly affect the metabolism of fish. The river eel is a warm-water fish, and the water temperature requirement for its breeding growth period is 11 33, and 25 28 is the most suitable. Guangdong, Fujian and Taiwan are the most suitable for eel farming.

2 pH: Most of the water used in eel farms is taken from natural water, which is acidic or alkaline due to the influence of geographical environment. For the growth of eels, the productivity of slightly alkaline water is slightly higher than that of acidic water, and the pH range of water for eel farming is the most suitable range.

3. Dissolved oxygen: The maximum amount of oxygen dissolved in water (i.e., saturation) is directly related to water temperature. If the water temperature is low, the dissolved amount of oxygen is large; There are many phytoplankton in the water, and the amount of dissolved oxygen in the water will also increase.

The amount of dissolved oxygen used in water for eel farming is 5 12 milligrams per liter. Generally, groundwater has a low amount of dissolved oxygen and must be aerated before it can be used.

4 Calcium and silicate: The less calcium ions in the water and the more silicate ions, the higher the fish mortality rate. The ratio of silicate to calcium is not harmful to fish, so it is more advantageous when there is more calcium and more silicate.

5 Biogas and hydrogen sulfide: These two gases are produced when there is a lack of oxygen in the water and a large amount of organic matter decomposes, these gases are toxic and very harmful to fish, and the content of biogas and hydrogen sulfide in the water used for eel farming must be less than gram cubic meters.

6 Ammonia: Ammonia is abundant in surface water. According to Ellis (1944), the ammonia content of water used for eel farming must be less than a gram of cubic metre.

In addition, Biockway (1950) believed that for every 1 gram of ammonia in water, there was a decrease in oxygen in the blood1 7. Therefore, when using groundwater and surface water, it is necessary to know its content and treat it with aeration before use.

7 Iron: In surface water, iron is generally relatively low. Groundwater, on the other hand, tends to have a high iron content and exists in the form of ferrous ions, and once it comes into contact with air, it will act to form 3-valent iron precipitates, which not only consumes a lot of oxygen, but is also not suitable for eel farming.

The iron content of water used for eel farming is required to be less than 1 gram cubic meter, and the most suitable is less than one gram cubic meter.

1. Farm requirements. The selection of breeding sites is one of the most important conditions for eel farming, and it is difficult to breed eels without a suitable farm. The eel breeding site generally needs about 50 acres of specifications, and the farm should be equipped with a water injection system, drainage system, heating and cooling system, aerator and so on, and the eel pond should be planned at the same time.

2. Water quality requirements. Eel farming has particularly high requirements for water quality, preferably slightly acidic, so that the eel is more productive. In addition, the content of heavy calcium, nitrate and this stage, hydrogen sulfide, ammonia and iron in the water should be reasonable, otherwise it will also affect the normal growth of eels.

3. Bait requirements. The feed of eel farming is mainly carnivorous fish, and when breeding, if the bait selection is not reasonable, it will lead to the failure of breeding. In general, we need to have an adequate supply of earthworms or small insects and small fish.

Secondly, fresh fish can be crushed through a meat grinder and fed.

The water temperature should be between 25-28, and the oxygen content in the water should be sufficient, and the calcium, nitrate, hydrogen sulfide and iron in the water should be reasonable.

Pro, hello, river eels can be raised in seawater, Zhejiang Province seawater river eels have been successfully raised River eels generally grow or breed in fresh water, located in Sanmen County, Zhejiang Province, Taizhou Golden Tide Fishery Development ****, this year the use of high pond seawater aquaculture river eels, has been successful, Yuan Minxiao artificial breeding of sea eels is also marine aquaculture, not freshwater aquaculture, so there is no earthy smell. There is a risk that there will be residues of drugs introduced during rearing in captive river eels, and this will be the case in moray eels without hail.

Eels can be farmed in captivity, but the most difficult method is still in the laboratory stage. It will take at least a few years to achieve the full stage of eel farming.

Eels are mainly distributed in the Yangtze River, Minjiang River, Pearl River basin, Hainan Island and rivers and lakes in China. Eels are mainly found in tropical and temperate waters, with the exception of the European eel (Anguilla anguilla) and the American eel (Anguilla rostrata), which are found in the Atlantic Ocean, and the rest in the Indian and Pacific Oceans.

Habits:

Adult eel grows fast, the appearance is round, like a round cone, the color is black and the body is clear, there are more artificial breeding, and the meat is fresh and tender. This fish is common all year round, but it is the fattest in summer and winter. The eel is rich in nutrition, delicious, less spines and more meaty, and has the effect of cooling and relieving heat, nourishing and strengthening the body.

Migratory fish are born in freshwater rivers and then enter the ocean, returning to freshwater rivers to spawn when they reach adulthood. Eels, on the other hand, spawn in the seawater, where the small fish, which are finger length and cannot distinguish the sex, flow into the river until they reach adulthood. A few years later, they return to the ocean again to mate and lay eggs.

Eel fry cannot be artificially bred because it has a special living habit, and it is difficult to artificially simulate its breeding environment.

It depends on the growth environment, if it grows in an environment with good water quality and sufficient food, it can grow to more than two catties of reins in a year, and vice versa, it can grow less than two catties in three years.

Eel. It grows and develops in rivers and lakes, often lies in the day and night, likes flowing water, weak light, and burrowing, and has a strong ability to trace water and abscond.

The living environment of the electric eel is extremely extensive, mostly turbid, slow-flowing waters, which brings two characteristics to it:

The first is that the eyes are basically useless, they have degraded very early, and they must rely on a weak current to detect the surrounding environment, so the circuit of the electric eel is actually open for a long time.

The second is that there must not be any beautiful colors in such dirty water, so the body color of electric eels is very average, the upper body is gray and black, and the lower abdomen is orange, which is a very popular color for cherry blossoms.

Precautions for electric eel feeding.

1. Seed selection. Because the eel is very expensive, it is necessary to choose those plump, robust and active seedlings for seedling breeding, otherwise it is easy to cause death and will cause direct cost losses. Generally speaking, this type of nursery is selected to ensure the viability of the eel, and at the same time, it is easier to survive in the subsequent breeding management process.

2. Water quality management. Eels as marine creatures.

Of course, it is not a high-quality water quality environment, it is recommended to use it near Haikou for breeding, in order to restore the marine environment to the maximum extent for eels, it is generally necessary to build a special breeding ground in the breeding place.

The water temperature is required to be kept between 8 and 30, and it is necessary to pay attention to the speed of the water flow not too fast, which is easy to wash away the fish, and you can also place oxygen pipes to the breeding place to ensure that the water has enough oxygen to support their activities.

3. Breeding density. The breeding density needs to be adjusted according to the species of eel, generally if it is a small eel, about 120 can be put in one square meter. In the process of breeding, it is also necessary to pay extra attention to the growth of eels, and the weaker ones can be separated to take care of them carefully to avoid the weak and the strong.

Eel fry cannot be artificially bred because it has a special living habit, and it is difficult to artificially simulate its breeding ring.

Eels grow in rivers on land, migrate to the ocean to lay eggs after maturity, only lay eggs once in their lives, and then die after spawning, small eels only have the length of their fingers and cannot distinguish the sex, so they flow into the river until they grow to adulthood to distinguish the sex, and after a few years they will return to the ocean to mate and spawn, so it is difficult to simulate their living environment under artificial conditions.

For example, when the Japanese eel grows up in freshwater rivers, it begins to migrate to the ocean in the summer to spawn, which is the opposite of the anadromous migration habit of trout, salmon and other animals that swim back to the rivers from the ocean to spawn.

Eels can be artificially farmed, but they cannot be artificially bred. Eel fry cannot be artificially bred because it has a special living habit, and it is difficult to artificially simulate its breeding environment.

Artificially cultivated eels need to pay attention to the stocking density of eel seedlings, stocking time, freshness of water quality and hygiene of the breeding environment. In China's aquaculture eel generally adopts the open-air water-stopping type, it is recommended that the scale of the eel farm is 50 acres, and the breeding facilities mainly include eel ponds, drainage systems and ancillary facilities, and the use of rivers, lakes, reservoirs and groundwater and other relatively pure water as water sources.

Eels are an endangered species, is artificial breeding useful, it seems that human beings have too much misunderstanding about the reproduction of eels.