What to pay attention to when selecting wild eel seedlings

In order to succeed in breeding, high-quality seedlings are the prerequisite. Therefore, when selecting high-quality wild eel seedlings, we should pay attention to the following ten points.

1. The size and specification of eel seedlings should be suitable under normal circumstances, the artificial breeding time is 5 to 6 months, and the weight gain is 2 to 4 times. At the end of the year, only individuals with specifications above 100g can get a higher price. Therefore, the weight of seedlings released from April to May should be more than 30g.

Second, try to choose the caged seedlings of Monopterus Albus from two sources: artificial breeding and natural trapping. At present, the number of artificial breeding seedlings is very small, and the eel seedlings needed for artificial breeding are mainly naturally captured. The main capture methods in natural waters are cage capture, electric capture, needle fishing, medicine capture, needle fork, bamboo clip and freehand capture, among which the survival rate of caged seedlings is the highest. therefore, caged individuals should be selected as far as possible in the selection of wild eel seedlings.

3. The quality of seedlings is good. The common species of Monopterus Albus are: dark yellow eel, which is fat and dark yellow, with large brown spots on the back and both sides, and large spots connected to the back and both sides from the front of the body to the back and both sides of the body. Earth red spot eel, the body color is soil red, especially on both sides. Light yellow fine-spotted eel with light yellow body color, inconspicuous spots and almost no markings. The bluish-gray eel has a bluish-gray body and has fine brown spots on the body, but no markings are formed. Practice has proved that the first two kinds of Monopterus Albus are the first choice for artificial breeding.

4. Eel seedlings should be free from diseases and insect pests. The four common diseases of eel seedlings are skin rot, water mildew, parasitic diseases and enteritis. All eel seedlings suffering from the above diseases should be removed.

Fifth, there should be no trauma on the body surface of eel seedlings, such as blood in the mouth, needle eyes, head skin abrasions, abdominal skin abrasions, body needle fork eyes and other common symptoms. If the rice field eel is poured into 3% to 5% saline solution, the injured individual will jump immediately, and this kind of rice field eel should also be eliminated.

6. when the eel seedlings want to be strong and have the strength to grasp healthy rice field eels, they feel that the eels are strong and have greater strength to escape; the rice field eels that are soft and weak and have drooping heads and tails when grasping are unhealthy rice field eels, which should also be eliminated.

7. The mucus of eel seedlings should fall off or decrease from the whole body or local part of the normal disease and poisoned ricefield eel, and the hand grasp has no sense of smooth or the sense of smoothness is not strong or the mucus is obviously shedding. This kind of ricefield eel should also be eliminated.

8. The eel seedlings should be flexible and sensitive to pour the rice field eel into a porcelain basin filled with shallow water. The healthy eel's swimming posture is normal. If there is any interference, the whole rice field eel will suddenly shake and make a "whoosh, whoosh" sound. Those inactive individuals who are prone to floating head and belly up should be eliminated.

9. The temporary breeding time should be short to purchase seedlings from eel catchers, and the temporary breeding time should not exceed 3 days. It is best that the eel seedlings caught on the same day can be purchased and released on the same day.

10. It is not suitable to buy eel seedlings that have changed hands too many times to purchase eel seedlings for breeding. Eel seedlings should be personally selected from eel catchers as far as possible, and eel seedlings that have been sold and resold in many ways should not be purchased, otherwise the quality of eel seedlings can not be guaranteed.