Several problems that should be noticed when feeding crabs
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Several problems that need to be noticed in the feeding of crabs: In the process of intensive fish farming, bacterial enteritis often occurs, especially in developed areas in Fujian, where the disease is not easy to cure completely, and the recurrence rate is high. The majority of breeders. Pathogens and Symptoms: The pathogens of enteropathitis are mainly caused by P. aerogenes and P. aeruginosa. Observed on the outside, it is usually seen that the anus is red and swollen. The excrement is gray and floating on the surface of the water. Anatomy can be seen in the intestine of the carp wall with micro-blood congestion or severe congestion, containing pale yellow or blue mucus, and light pressure on the abdomen can flow out of the gravy, and when severe, digestive tract water accumulates, causing the abdomen to swell. The liver is swollen and fatty. Popular features: Intestinal disease generally occurs throughout the year, but the most popular is from May to October of each year. The temperature is appropriate during this season. On the one hand, the eel feeds vigorously, and some food courts continuously increase the food intake, resulting in some eel gluttony. It is also very easy to cause infection of the intestinal tract. On the other hand, the water temperature rises during this season, the bacteria multiply quickly, and slight carelessness. Disinfection is not keeping up with it and it is easy to cause infection. Especially during the rainy season, special attention should be paid. Prevention: In the routine prevention, most of the market uses antibiotics such as chloramphenicol, norfloxacin and other oral administration, but long-term use of antibiotics not only has a negative impact on the growth of carp, but also more susceptible to drug resistance, so that recurrent outbreak of enteritis, Damage to the internal organs of the carp, such as the liver, directly affects the growth rate. Practice has proved that adding non-drug substances can assist the digestive system nutrients, more effectively promote the formation of the ideal micro-ecological environment of carp gut, reduce the content of spoilage metabolites, enhance the immune function of carp, adjust the body's metabolism, Significantly reduce the incidence of enteropathies and achieve ideal disease resistance. Several methods for the prevention of enteritis by adding polysaccharides and other disease-fighting agents to feeds for a long time are described below: 1. Bacteria with viable microorganisms added 2-3 g per kilogram of feed. 2. Add 1–2g of fructose per kilo of feed. 3. Polyphosphorus Vc is added 1-2g per kg feed. 4. EZO adds 0.5-0.8g or 1-1.5g per kg feed. When the bacterial enteritis disease occurs, the following methods are used to treat the disease. The therapeutic effect is very good and it is worthwhile for various breeders: 1. Add 0.5 g per kilogram of feed for enteritis, 2 g per kg of feed for polyphosphorus VC, and 1 kg per kg of vital bacteria Feed 4g, continuous feeding 5-7 days for a course of treatment. 2. At the same time as the treatment of drugs, at the same time Quanchiposa 鳗 2-3ppm, after 3 hours Quanchiposa dichlorine due to 0.5ppm or bromochlorohydrin 0.5ppm or quick-acting liquid ClO23-5ppm 24 hours after changing the water .