南方鲶的三代虫病研究
Studies on Gyrodactyliasis of the Southern Catfish (Silurus meridionalis)
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摘要: 南方鲶(Silurus meridionalis)的三代虫病病原体是古雪夫三代虫(Gyrodactylus gussevi Ling， 1962).该虫离开南方鲶后，有粘液时，存活率比无粘液时高(32-83)%，存活时间也较无粘液时长(1.5-3.5) h.古雪夫三代虫可通过养带虫鱼的水及与病鱼直接接触传播.该三代虫最先感染南方鲶的部位是上颌须和臀鳍，其次是尾鳍和其它部位.南方鲶患三代虫病的早期症状是上颌须变软、变白和断须，通过这一特点，可进行该病的早期诊断.Abstract: In the conditions of tests gyrodactyliasis of southern catfish (Silurus meridionalis) was studied.The conclusions can be drawn as follows:Gyrodactylus gussevi Ling,1962 was the parasite which caused gyrodactyliasis of the southern catfish.Survival rate and period of G.gussevi were much higher and longer in presence of mucus of the catfish than those in absence of mucus of this fish.G.gussevi could be transferred to uninfected southern catfish by placing them in the same tank with the infected catfish or in the water in which the infected catfish was removed.One pair of maxillary barbels and anal fin of the catfish were earliest infected by G.gussevi,then caudal fin and other sites were.Maxillary barbels progressively getting white and Soft and finally broken at their some places were initial symptoms of this disease,as was a valuable aid in diagnosis in early stages of the gyrodactyliasis.
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Key words:
- Silurus meridionalis /
- Gyrodactyliasis /
- transmission /
- initial symptoms /
- early diagnosis /
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