Prevention and treatment of several common diseases in perch culture
Sea bass has strong disease resistance and is not easy to get sick under natural conditions. However, due to the great changes in its living environment and space, artificial high-density culture is easy to cause disease. It is necessary to strengthen disease prevention, regularly disinfect aquaculture ponds and tables with drugs, and find diseases and treat them as soon as possible. Common fish diseases are:
1. Enteritis
The abdomen of the diseased fish is dilated, the anus is red and swollen, and there is a yellowish mucus outflow from the squeezed abdomen. It is mainly caused by feeding stale and spoiled feed. Oxytetracycline can be used as bait for treatment, 10 grams for every 50 kilograms of fish, halved after the next day, continuously fed for 6 days, or 2 grams of norfloxacin for feeding.
2. Gill rot disease
The sick fish are dark, wander away from the group and slow to respond to the outside world. Open the Gill cover, the Gill filament is pale and the Gill is rotten. The cause of the disease is that the water quality becomes turbid after heavy rain, and it is easy to catch the disease, especially after cage culture after heavy rain, the upstream mud and sand flow hits the fish, and the sea bass is very easy to be infected with this disease, resulting in great losses. Erythromycin can be used for treatment, 0.5g for every 50kg fish, continuous bait feeding for 6 days, at the same time, 0.4ppm strong chloride is used to sprinkle the whole pond or cage for 3 days, the therapeutic effect is more obvious.
3. Hemorrhagic disease
The base of the pectoral fin and dorsal fin of the diseased fish is red, swollen and congested, and the diseased fish moves slowly and the food intake decreases. The disease is a viral infection with strong infectivity. The treatment can be fed with a mixture of virulent and antibiotics, 0.5 grams of virus and 1 gram of norfloxacin for every 50 kilograms of fish, mixed with bait for 6 consecutive days. At the same time, the pond was sprinkled with 0.4ppm strong chloride throughout the pond, once a day for 3 consecutive days.
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Practical experience of culturing sea bass
Perch belongs to perch order, perch subfamily, wide salt fish. It is distributed along the coast of China and is rich in resources. Perch has the characteristics of fast growth, wide adaptability, strong disease resistance, delicious meat and so on. Loved ones are welcome. The culture techniques are as follows: first, the construction of ponds
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Prevention and treatment techniques of several common diseases in cultured California perch
California perch is extremely resistant to disease, so the incidence of disease is quite low. So far, there are the following known diseases: 1. Needle disease (Anchor head disease): this disease occurs only in a few individuals, and most of the parasitic sites are at the base and tail of the dorsal fin or Xiamen fin.
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