The rift lakes Albert and Edward, as well as Lake George, Uganda, were sampled at near shore and offshore sires during March 1995 with attention to water column chemistry, plankton biomass, and production rates. Biomass of phytoplankton exceeds that of zooplankton in both rift lakes, and the predictive relationship between light attenuation and particular€ chlorophyll is consistent with that of Late Victoria.
Cyclopoid copepods dominant Albert and Edward calanoids are rare and
Cladode represent less than ten percent of zooplankton biomass. Although previously reported to be present in other lakes in the Nile system, Themodiaptonus galebi as not confirmed in lake Albert before this study. Adult males and ovigerous females of The species were collected in lake Albert and immature females were sampled in Lake Edward. Mesocycles collected from lake Albert, which is a new record for this species from East African Rift Valley lake