Selection and release of eel species

The seedlings of @ # @ 236 rice eel come from two ways: breeding and purchasing wild ricefield eel. This paper focuses on the acquisition of wild ricefield eel for breeding. At present, the acquisition of wild ricefield eel for artificial breeding is a common method adopted by most eel farmers. It is generally purchased from April to September and listed on the market in winter or around the Spring Festival, which can increase the weight by 1 Mel 5 times (depending on the length of time of acquisition and breeding). Generally, the purchase price in summer is less than 20 yuan / kg, and the selling price in winter is more than 40 yuan / kg, so the breeding benefit is very considerable. Generally used for breeding Monopterus Albus sources are: cage capture, electric catch, hand catch, etc.; for fishing, trapping Monopterus Albus should be selected according to the degree of damage; Drug catch Monopterus Albus should not be used. The way of purchasing ricefield eel is generally self-catching and self-feeding, ordering from familiar eel catchers, or purchasing from township markets. Monopterus Albus, which has been stored in high density for a long time and in large farmers' markets, cannot be used for breeding. When purchasing in the township market, you should check whether Monopterus Albus has redness or blackening of the cheeks (obvious congestion or congestion blackening), anal redness, valgus, obvious trauma, and so on. If a family of Monopterus Albus has these phenomena, do not purchase; if the first purchase is not very good at identifying, you can look at a few ricefield eels, and it is not difficult to see its parotid color and anus. The rice field eel purchased for breeding should weigh 30Mel 80g, which is too large and expensive, and its growth is slow when it grows to 300g. It is too small and fragile, and the mortality rate is higher after capture injury. The purchased ricefield eel should immediately add pond water and aquatic plants not less than 4 times the body weight of the eel, and will be released immediately. The release density of eel species increases or decreases according to the length of time to prepare for breeding, generally 1ml / m ~ 2. Eel should be fed on the same night when it is put into the pond, using chopped @ # @ 254 eggs, pig liver, mussel meat, fish, etc. (fresh maggots can also be used for @ # @ 261 eggs @). At the same time, according to the fresh material weight of 1 kg, add the following drugs: electrolytic Duowei 10g, Eel Baoxin 4 g, Eel Bao 5 5 g, use a special adhesive or a small amount of @ # @ 245mm @ flour to adhere the medicine to the feed. The feeding amount is 0.5% of the body weight of Monopterus Albus, the feed can be directly put on the aquatic plants, and the cement pool can also put the feed directly to the place where there are no aquatic plants in the pond, and more feeding points should be set up as much as possible. The next morning, every cubic meter of pool water was sprinkled with eel Baoxin No. 5 5 g / 1 cubic meter water over the whole pool (box). The above medication should be carried out for 3 days in a row.