The first stage of taming method of eel seedlings in eel farming

The eel domestication process can be roughly divided into two stages. The first stage is changed from night feeding to day feeding, and the second stage is changed from feeding fresh bait (silk earthworms) to feeding matching feed. The change of eel seedlings from scattered foraging to concentrated feeding in the canary is gradually completed in these two stages.

The first stage of domestication is carried out at night. Using the characteristics of eel seedlings to low light, according to the size of the first-level pool area, set up 5 to 6 tables of 30 cm × 30 cm x 10 cm made of barbed wire around the wall of the pool, hang 1 table every 5 to 6 meters along the wall of the pool, and configure 15 to 25 watts of incandade lamp near the water above each table. Generally, eel seedlings begin to be domesticated on the third night after free-range. If the pool is heated, the eel seedlings will be heated by 4℃ every day after free-range, and when it rises to more than 20℃, they can be domesticated. The first day of domestication begins at seven or eight o'clock in the evening. It is fed to the cut-off silk earthworms. It is fed four times a day and night, at intervals of 3 hours each time, and the last time should be fed before dawn. The first day of the feed is 5% of the weight of the eel, and 1/3 of the first one. 5 minutes before feeding, first stop the oxygen increase mechanism to stop the flow of the pool water (to prevent the loss of feed), then turn on the electric light above the feeding table, and hang the good food table (the food table should be suspended close to the wall of the pool, and the depth should be slightly exposed to the upper limit of the water). After the water flow is completely static, the cut-off earthworms are scattered in each table. The order of delivery is: first put it in the table in the position of the food field, and then put them one by one from near to far. Because the smell of silk earthworms in the water spreads quickly, it can attract eel seedlings to eat on the table.

The silk earthworms fed each time should eat the eel seedlings in an hour and a half. After eating for an hour and a half, whether the bait is finished or not, they should stop eating, take out the bait, turn off the lights, and hang the food platform away from the water. At the same time, turn on the aerator and wait for the second feeding. The number of silk earthworms fed for the second time depends on the first feeding situation. Generally, 1/5 to 1/6 of the amount fed throughout the day. When the last meal is over, the remaining ones and some fresh silk earthworms should be added and scattered at the bottom around the culture pool, so that the eel seedlings that are not on the table can be eaten. The amount scattered is generally 1% to 2% of the weight of the eel seedlings. Because the eel seedlings are not used to feeding on the table at the beginning of food. Therefore, they should be fed silk earthworms for the same time for 3 to 4 consecutive days. After 80% of the eel seedlings come to the table to feed, the first feeding time can be gradually postponed. In this way, after about 7 to 10 days of feeding, the eel seedlings can slowly adapt to eating during the day, thus changing the original habit of eating only at night.

After the feeding time is transferred to the daytime, after 1 to 2 days of adaptation, when the daily intake of silk earthworms reaches more than 20% at 20℃ and more than 40% of the water temperature at 25℃, the second stage of domestication (bait transition) can be carried out. At the same time, with the enhancement of the feeding and activity ability of eel seedlings, the silk earthworms fed were gradually changed from cutting off to feeding the whole strip, and the bait feeding platform was gradually reduced and concentrated in the feeding field. ( This article is selected from "Supporting Techniques for Eel Cultivation")