MySheen

BROOKWORM DISEASE OF LIONFISH

Published: 2024-11-25 Author: mysheen
Last Updated: 2024/11/25, Pathogen: This insect belongs to the family of tube mouth and inclined tube. The back is raised in side view, the ventral surface is flat, the ventral surface of the insect is elliptical or oval, the size is 45-80×29-53um, there is a round cell in the front of the ventral surface, which can expand and contract. There are cilia in the front and back edge of the insect body, and there is a petal like a flower behind the macronucleus. This insect reproduces by division. Epidemic situation: The disease is prevalent in hot weather and mainly harms fry of 20 - 50 mm. Water temperature above 25℃. at high

Pathogen: the worm is grouper valve insect belongs to tube mouth, oblique tube family, side view can see back uplift, ventral surface is flat, worm ventral view is oval or oval, size 45-80 × 29-53um, ventral front has a round orifice, can be telescopic, the front and back of the insect body has cilia, there is a valve body like hair behind the large nucleus, this worm is propagated by split method.

Epidemic situation: the disease is prevalent in hot days and mainly harms 20-50mm fish fry. The water temperature is above 25 ℃. It is more common in high-density aquaculture and cage, with rapid incidence, high infection rate and high mortality rate.

Symptoms: it is mainly parasitic in the gills of fish fry, when a large number of parasites are gray-white, there are a lot of dirt on the Gill, irregular white spots are formed on the rest surface, the pectoral fins extend vertically from the body, and the diseased fish often float on the surface and swim slowly. It can be judged by microscope.

Control methods: 1. Soak the fish in fresh water + 20ppm furazolidone for 2-5 minutes. 2. Bathe the fish with seawater + 200ppm formalin for 20 minutes under the condition of increasing oxygen. 3. Soak in seawater + 2ppm copper sulfate for 10-20 minutes (small fish use carefully).

 
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