Non-medicinal treatment method for sessile ciliate disease of scylla serrata

Abstract

The invention discloses a non-medicinal treatment method for a sessile ciliate disease of scylla serrata. When a scylla serrata shows a symptom of a sessile ciliate disease, an attachment on a carapace at the back of the scylla serrata is taken to be placed under the (10*10)-time visual field of a microscope for a microscopic examination, when the number of sessile parasites is not less than 50, black breams of which the body lengths are 5 to 10cm and the quantity is 300 to 1200 per mu are put into a pond to breed. After fry are put into the pond, the feeding of both fish and the scylla serrata are stopped for 6 to 13 days, the excrement of the fry of the black breams is gathered, crude protein content is less than 11.63 percent through detection; bottom mud is collected, superficial bottom mud is taken for detection, and total carbon content is less than 214.7mg / Kg. The body surface of the scylla serrata is periodically subjected to the microscopic examination under the (10*10)-time visual field of the microscope, when the quantity of ciliates on the body surface of the scylla serrata is not more than one, the disease is cured. According to the non-medicinal treatment method for the sessile ciliate disease of the scylla serrata, excessive organic matters at the bottom of the pond are eliminated through matching the fry of the omnivorous black breams by utilizing a scylla serrata culturing pond; a nutrition source of breeding the ciliates is cut off; a high-efficiency and environment-friendly method without using a medicine is provided for treating the sessile ciliate disease of the scylla serrata; the non-medicinal treatment method for the sessile ciliate disease of the scylla serrata has favorable popularization and application prospects.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a non-drug treatment method for the sessile ciliate disease of Scylla serrata. Background technique [0002] Scylla serrata (Scyllaserrata) belongs to Crustacea, Decapod order, Portunidae, Scylla genus. They like to live in shallow sea near the coast and in the sandy bottom of estuaries. They are ferocious and carnivorous. They like to forage for small shellfish, fish and crustaceans. The blue crab is delicious and nutritious, and is known as "sea ginseng". With the continuous deterioration of the offshore aquaculture environment, the diseases of Scylla serrata occur frequently, especially the sessile ciliate disease, which causes more and more serious harm in the cultivation of Scylla serrata. The most common causative agents of sessile ciliate diseases are straw worms, polycystic ciliates, and bell worms. When blue crabs develop sessile ciliate disease, there are fluffy ...

AI Technical Summary

Problems solved by technology

At present, there have been researches on the polyculture of fish and crabs, such as Chinese patents CN201410338887.5, CN201310360956.8, CN200610135254.X and CN201310654357.7, etc., which disclose different culture methods for polyculture of fish and Scylla serrata. However, none of them involved the principles and specific methods of preventing and treating sessile ciliate diseases of mud crabs by polyculture of fish

The treatment of sessile ciliate diseases of blue crabs is usually treated with chemical drugs, but often due to the quality difference of drugs, inaccurate dose control and the complexity of environmental factors, it has a huge impact on blue crabs, often accompanied by insecticide. A large number of deaths; there are also ways to promote the shelling of blue crabs, but the treatment effect is slow, ciliate diseases are difficult to cure, and the survival rate of blue crabs is extremely low

[0004] In summary, the traditional treatment methods for sessile ciliate disease in Scylla serrata have seriously affected the success rate of Scylla serrata breeding, and the method of disease treatment needs to be improved urgently.