Seasonal variations of bacteria in fish Etroplus suratensis and Etroplus maculatus (Pisces: Cichlidae)

摘要

Seasonal variations of bacteria in gills, alimentary canal and reproductive organs of E. suratensis and E. maculatus were studied. Maximum bacterial population was recorded during premonsoon (Jan.-April) and minimum during post monsoon (Sept-Dec.) seasons. Micrococcus spp were predominant in gills, alimentary canal and reproductive organs of both fish. Selected bacterial cultures were characterized for their physiological activities. Bacterial load in the alimentary canal of both the fish exhibited positive correlation with weight of that organ.