Prevention method for shuibiezi disease of crabs

Abstract

The invention provides a prevention method for a shuibiezi disease of crabs. The prevention method comprises the following steps: (1) a pond is disinfected thoroughly and viable bacteria are used for bottom improvement after adult crabs in previous year are fished or after a new pond is well dug; (2) an aeration facility is arranged in the pond; (3) a temporary culture pond is arranged for concentrated and intensified culture of crab species; (4) high-quality crab species are selected before stocking; (5) calcium and phosphorus in water and feed are supplemented regularly in a culture period; (6) an anti-microbial chemical is splashed in the whole pond every half month from May to August when the shuibiezi disease occurs frequently; (7) an immunopotentiator and a viable bacteria preparation are taken orally twice or three times in each month; (8) water is changed once every 10-15 days; (9) the water quality or a substrate is improved every 15-20 days, and water quality improvement and substrate improvement are performed alternately; (10) aquatic plants are controlled away from excessively fast growth. According to the measures such as disinfection of the crab pond, viable bacteria for bottom improvement, water quality improvement, juvenile crab culture and the like, the water quality, as well as nutrition and antibacterial components in the feed, is controlled very well, the morbidity and mortality are reduced effectively, and the crab quality is improved.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for preventing crab water slug disease. Background technique [0002] Crabs, also known as river crabs, are freshwater crustaceans that grow up in freshwater. The crab meat is delicious and nutritious. Crab is a delicacy that is commonly eaten by Chinese and overseas workers, but at present the source of crabs is still mainly fishing, and less artificial cultivation is carried out. Naturally grown crabs can no longer meet people's food needs. industry is developing rapidly. [0003] Artificial breeding of crabs has high requirements on the farms. At present, the required area of ​​the ponds for breeding crabs is generally 1-5 mu. The condition of crab ponds is sufficient water source, good water quality, and easy access to water. The water depth is generally 1-1.5 meters. . The best quality of the bottom of the crab pond is sandy loam and gravel soil, ...

AI Technical Summary

Problems solved by technology

[0004] There are still many deficiencies in the technology of artificially breeding crabs. People's experience in artificially raising crabs is still incomplete. During the growth of crabs, water sputum disease is prone to occur. The main symptoms are: the crab shell is soft for a long time but not hard, and it is difficult to molt. The liver and pancreas are severely damaged, the color is off-white, the abdominal cavity is hydrops, the crab does not eat, the jejunum, and some gill filaments are abnormal