Prevention and treatment of Infectious Fish Hemorrhage
(a) Pathogen Grass carp haemorrhagic disease is a fish disease caused by a virus, reovirus.
(2) Symptoms All organs and tissues inside and outside the body of grass carp show spotted or massive congestion, oral cavity, operculum, fin base, muscle, intestinal tract, liver, spleen, kidney and other organs appear congestion phenomenon, showing "red muscle type". The intestinal tract, fin base, operculum and oral cavity of grass carp species over 10~15 cm were mainly congested, showing "red fin fine operculum type" or "intestinal type", but muscle congestion was light or not congested. Grass carp over one year old also showed bleeding in different degrees.
(3) Epidemic situation The most suitable water temperature for bleeding epidemic is 25~30℃. April to June is the season of adult fish disease. July to October is the season of fish species.
(d) methods of prevention and treatment so far, no ideal drugs have been found. At present, mainly the application of hemorrhagic tissue plasma vaccine injection immunization and prevention. The sick pool can be disinfected by sprinkling disinfectant chlorine dioxide, and then oral rhubarb powder, 0.5~1 kg for every 100 kg of fish.
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Introduction to the Culture Model of Bamboo shoot Shell Fish in Thailand
Thai bamboo shoot shell fish is a new species of aquaculture, the market price is high, some people estimate that it is the best species of freshwater culture in the future, many farmers want to breed but do not know how to breed. According to the specific conditions of the Yellow River Delta, the author introduces several culture methods of Thai bamboo shoot shell fish in order to meet the requirements of farmers in different regions and environmental conditions. First, the pond area of Thai bamboo shoot shell fish cultured in the pond should be about 3 mu, usually no more than 8 mu, and the pond should have a water depth of 1.5 m, less silt and good water source. First culture of Thai bamboo shoots
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How to prevent and cure common intestinal diseases in fish
Viral intestinal diseases, enteritis. Harm object: grass carp, herring. Symptoms: the diseased fish have black body color, red and swollen anus, hyperemia at the base of the fin adjustment, erythema in the abdomen, intestinal inflammation, red or purplish red. Control method: before stocking ① fish, soak it with 10ppm bleach. During the ② epidemic season, the whole pool was sprinkled with 1ppm bleach every half a month, or sulfonamide interdrug bait was given. ③ garlic treatment. Garlic is 250 grams per 250 kg of fish seed and mixed with bait for 3-6 days.
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