Simple identification of fish diseases
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In the production of fish culture, to effectively prevent and treat fish diseases, we must first correctly diagnose fish diseases. Judging from the following aspects: First, look at the behavior of the surimi attack, the fish is mainly characterized by jumping up and down, sometimes sharp The squid swims in the water. The squid swims in the water, and the fish swim in the water. The scorpion fish fins are often exposed on the surface of the water, and the diseased fish swims or swims on the surface of the water body. Pesticides or industrial waste water poisoning, fish will appear excited, jumping and collision phenomenon, and then paralysis died. Second, look at the management of feeding feed is not fresh or spoilage, easy to cause fish enteritis disease; over-fertilization or fertilizer fermentation is not complete, prone to "floating head", or even "pan"; water quality is relatively thin, lack of feed ponds easy Cause wilting disease, race horse disease, etc.; pull the net to make fish injuries easily lead to white skin disease and watery mildew. Third, look at the tail surface of abdomen and abdomen on both sides of the round or oval-shaped erythema as a print disease; lesions with a cotton-like mass of white hair, for hydromycosis; scales off, the rays off, the body surface Inflammation, congestion, red skin disease; scales, pectoral fin base inflammation red and swollen, showing red spots, and a "nail"-like body, as the anchor head fish carp disease; body surface is pale green, shaped like bedbugs body, It is fish caries. Fourth, to see the end of the silk rot roaches, mucous more than bacterial gill disease; bracts color than normal fish bracts white, and slightly blood red dots, for Plaster; if trichotomy, oblique tube Parasitic insects and filariae parasitism are more mucous on the sepals; cocoon enlargement, white worms or cysts on the cockroaches, and maggots cover open, which are Chinese fish gill disease, myxospore disease and so on. Five, to see the intestine intestinal congestion in all or part of the red purple, there are a lot of milky mucous enteritis; intestinal wall with gray nodules lesions, surrounding tissue ulceration, and even perforation as coccidiosis; abdominal swelling There is a white banded parasite in the abdominal cavity, which is a tongue tsutsugamushi disease.