CATDOLL : CATDOLL: What are the key points of conger eel farming technology?

What are the key points of conger eel farming technology?

The pond for sea eel breeding is generally about 10-20 mu, with convenient water inlet and outlet, good water exchange conditions, and an average water level of more than 1.2m. The pond dam should be solid, firm, and without caves. The soil at the bottom of the pond should be soft to facilitate eels to burrow and live, but there should not be too much mud at the bottom of the pond, and it should not contain black rotten mud. Half a month before stocking, dry the pond and expose it to the sun or clean it with water, then sprinkle 75-100kg of dry lime per mu, or use 20-25kg of bleached poplar per mu, dilute it with water and sprinkle it on the bottom and side of the pond for disinfection. In addition, flat nets should be inserted in the gates of the pond inlet and outlet to prevent sea eels from escaping. Selection and transportation of sea eels Keep the environment dark to reduce the activity of sea eels. During the entire transportation process, the operation should be careful and fast, and the drying time of sea eels should be reduced as much as possible to prevent the sea eels from secreting too much mucus.

Pond conger eel farming technology and management

1. Feeding management:

The bait for sea eel farming generally uses fresh small hairtail, blue round, green catfish, etc. When fresh bait is in short supply, frozen or dried small fish and shrimp can also be used. Rinse the bait before feeding. Frozen bait must be thawed, and dried bait must be fully soaked in water before feeding. Large individual baits should be cut into pieces for feeding, and the bait should be thrown on the bait table to facilitate the cleaning of residual bait. Feed twice a day, and the amount of bait is generally about 5% to 15% of the fish body weight. The specific amount should be adjusted appropriately according to the amount of residual bait on the bait table, weather conditions, eel feeding conditions and bait quality. August to October is the period of rapid growth of sea eels. In order to lay a good foundation for sea eels to overwinter, the daily feeding amount at this stage should account for 10% to 15% of the total body weight; from November to December, the water temperature gradually drops, and the sea eel's food intake gradually decreases.

At this time, the daily feeding amount should be controlled at about 5%-8%. When the water temperature drops below 13℃, the sea eels will burrow to hibernate and stop eating, so there is no need to feed them. After the water temperature rises from March to May of the following year, in order to restore the body of the sea eels as soon as possible and improve the survival rate, high-quality fresh bait should be fed as much as possible, and the daily feeding amount should be controlled at about 8%-10%. It should be noted that sea eels basically do not eat in the first 7-10 days after entering the water due to environmental changes, so no feeding is required. In the first 3 days of catching and selling, in order to prevent the sea eels from "regurgitating" during long-distance transportation and polluting the water quality, which affects the survival rate during transportation, no feeding is allowed.

2. Water quality management:

When the moray eel is first put into the pond, due to the difference between the pond environment and the sea environment, the moray eel is very active, "nausea" and secretes mucus. To maintain fresh water quality within 1-2 days after entering the pond, the water must be changed more frequently, with a daily water change of 100%. In the hot season, the water must be changed twice a day, with a daily water change of 80%. The daily water change is usually controlled at around 50%. In winter, the water temperature drops, and the fish burrows and does not eat. Generally, the water change is controlled at around 30%. The transparency of the pond water should be maintained at 30-50cm, and the pond water should be maintained at more than 1.2m in winter.

3. Fish disease prevention and control

In the process of sea eel farming, enteritis is the most common disease. The main causes are poor water quality in hot seasons, feeding spoiled bait and fish overeating. The treatment method is to improve the water quality first, not feed spoiled bait and control the fish's food intake, and then add 3‰ of furazolidone to the bait and feed it continuously for 3-5 days. In August-October, you can feed medicated bait regularly to prevent fish diseases.

4. Other management:

Insist on frequent pond inspections and observations, and conduct 1-2 pond inspections every day to check whether there are gaps or holes in the embankment, flat nets, and gates. If there are any, they must be repaired in time to prevent eels from escaping. In addition, check whether there are sick or dead fish. If any are found, they must be removed in time to prevent disease transmission. Pay attention to the feeding and swimming conditions of the conger eels, and take timely measures if any abnormalities are found.

5. Harvest

The catch time is determined according to market demand, usually in April or May of the following year. The pond water is drained. The specific method is to install a triangular net with a net bag outside the gate. When the gate is opened, the conger eels are collected in the net bag along with the pond water. This method is repeated several times until no more conger eels can be released.

Pay attention to the breeding density, choose high-quality varieties, choose coastal areas for breeding, choose high-quality feed, replace water resources in time during the breeding process, and do not use medication too frequently. Finally, you must control the breeding temperature, keep the temperature at around 4°C, and pay attention to the oxygen in the water.

The water quality is excellent. Generally, fresh small hairtail can be chosen as bait, or dried small miscellaneous fish can be used. The breeding area is recommended to be around 10 to 25 square meters. Regular inspections should be carried out to ensure that there are no other species of fish in the fish pond to avoid biological invasion.

When breeding conger eels, we must pay attention to their nutritional value, and also pay attention to the water temperature and the dryness and cleanliness of the water. At the same time, we should also choose to use some water resources that can be recycled, so that the situation can be more balanced.

1. The breeding space should be large. 2. The bait for sea eel breeding is very picky. Generally, fresh small fish, blue round fish, silver catfish, etc. are used. 3. The transportation process should be slow and not bumpy.