How to breed sand eels in detail

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 early farm should be equipped with a water injection system, a drainage system, a heating and cooling system, an aerator, etc., and an eel pond should also be planned.

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 calcium, nitrate and this stage, hydrogen sulfide, ammonia and iron in the water should be reasonable, otherwise it will also affect the normal growth and height of the eel.

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.

Eels are mainly distributed in the Yangtze River and Minjiang River in China.

As well as the Pearl River and other places, with the fishing of fishermen, the wild eel is becoming less and less, and most of them are factory farming by farmers. The economic value of eels in the market is very considerable, especially the high rate of return on investment in intensive factory farming.

It is also high, and the intensive farming model has also caused the water quality requirements in eel farming to be very high

1. Water temperature: 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.

2 pH.

pH): For the growth of eels, the productivity of generally slightly alkaline water is slightly higher than that of acidity, and the pH range of water for eel farming is the most suitable range.

3. Dissolved oxygen content: The dissolved oxygen content of water used for raising reed eel is 5 12 milligrams of liters. Generally, groundwater has a low amount of dissolved oxygen and must be aerated before it can be used.

4 Calcium and silicate.

Calcium ions in water.

Less, more silicate ions, higher fish mortality. 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 biogas and hydrogen sulfide content of 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 gram cubic meters, not too much and not too little, otherwise it will also affect the normal growth of eels.

However, in the process of factory farming, with the increase of feeding, the accumulation of ammonia in the water will be higher and higher. Therefore, it is recommended that in the breeding process, you can add Yucca (Yucca) to the feed.

extract), which can significantly improve the utilization rate of feed protein and slow down ammonia nitrogen.

and can improve the intestinal health of eels and maintain the balance of intestinal pH flora.

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

The water quality used for eel farming must meet the water quality standards for fishery water recreation and the special requirements for eel farming water in order to ensure the food quality of aquaculture commercial eels, and the eels produced have no peculiar smell, and the accumulation concentration of harmful substances in the body does not exceed the standards stipulated by health. Return.

1.Pond settings. The area of the pond can be about one mu, and the inlet and drainage devices should be set up, and 30 mesh screen curtains should be placed to prevent the eel seedlings from being lost with the water.

The pond water depth is maintained at about 80 cm. Conditional can be paved on the top surface of the pond embankment, the floor tiles extend to the pond 5 10 cm, the distance from the top of the embankment to the water surface should be kept about 40 cm, in order to prevent the eel seedlings from escaping. 2.

Pond disinfection. After the pond is cleaned, it should be exposed to the sun for at least a week, and if there is enough time, it is better to expose the bottom of the pond to the cracked silt. 10 days before stocking eel seedlings, disinfect with 150 kg of quicklime or 20 kg (containing 30% of available chlorine) of bleaching powder per mu.

After a week, drain the disinfection tank and add new water. Eel seedlings should be tested before stocking. 3.

Stocking density. About kilograms of eel seedlings are placed per square meter of water surface.