GROWTH AND SEA50NAL DYNAMICS OF BACTERIA IN FISH PONDS

The amount of bacteria in fish pond was plenty and changeable.The sequence of the total amount of bacteria was summer,autumn,spring and win-tar. In water, the organo raphs were more ixi summer, while in bottom-mud theywere more in autumn. The amount of erganotrophs and the total amount of bacteria,were correlated positively to the chemical oxygen demand (CCD). The fatal amountof bacteria showed a positive correlation to water temperature, but the organotro-phs were not. The total amonut of bacteria and organotrophs were not correlated tothe plankton biomass, but the total amount of bacteria were correlated to the zoo-planlton biomass. The suitahle pH range for growth is 6.4-9.4. The power of thecommon fisheries medicines reducing the amount of bacteria wars in order of bleeding powder>CuSo,FeSo,mixture>dipteregx