The methods of diagnoses and prevention and control of some primary diseases was indicated. The survival rate of ?Anguilla anguilla? had been raised from 12%(1995) and 28%(1996) to 81%(1999).

• 提出了几种主要病害的诊断与防治方法,使鳗苗成活率由1995年的12%25和1996年的28%25提高到1999年的81%25。