Intestinal mycosis of fish
The pathogens are zygomycetes, insect molds, frog faeces and frog feces.
The anterior abdomen and anus of the diseased fish obviously swelled, forming two white protruding places. The diseased fish could not defecate because of anal blockage and died soon. The abdominal wall soon wore out after death, revealing sticky internal organs. Anatomical examination of diseased fish showed that there was a white sticky fatty substance outside the stomach and intestine, the intestine became thicker and white, the intestinal wall became thinner, the interior was full of hyphae and its conidia, the end of the intestine was particularly dense, and mycelia were also distributed in the stomach of a few diseased fish. but no infection of abdominal cavity and other organs was found.
Prevention of oxytetracycline, furan antibiotics and griseofulvin, clotrimazole, clotrimazole, chlorhexidine and other antifungal drugs were not effective. Through the drug screening test, it was found that nystatin, rhubarb and malachite green had obvious inhibitory effect on frog fecal mold. In recent years, malachite green was regularly used to disinfect fish ponds in fish fry production, and the incidence rate was significantly reduced.
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Cooking techniques of characteristic garlic prawns
Shrimp can enjoy the delicacy of shrimp in a variety of cooking methods, such as braising, beauty, and so on. Sea shrimp meat is more fresh and sweet, used to be extremely beautiful, the feeling is "a mouthful of crisp", with nine-story tower, too fragrant. Nine layers of Tameiji sea shrimp, using chilled sea shrimp. It's not very big, so it's suitable to be beautiful. (preferably remove the shrimp intestines) remove the shrimp head, pour oil into the pan, fry the shrimp until crisp, stir-fry the garlic and chili, stir-fry with soy sauce, and finally add the nine-story tower to stir-fry. Meiji sea shrimp tastes crisp when it is cold.
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Skills for distinguishing the quality of fish
The quality of pellet feed for fish is closely related to the benefit of culture, which should be paid close attention to. Its quality is mainly judged by five aspects, such as "one look, two smells, three twists, four bubbles, five chews" and so on. it is introduced as follows: first, fish pellet feed is made by evenly mixing several main raw materials, such as fish meal, soybean meal, cottonseed meal, rapeseed meal, secondary powder, meat and bone meal, etc. If there are more fishmeal and soybean meal, the material color is slightly yellow; when there are more miscellaneous meal, the material color is dark red; when there is more secondary powder, the material color is slightly gray, and so on.
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