Per capita ingestion rates for the macrozooplankton averaged 0.0127±0.0050 μg CHLa ind−1 day−1 with associated filtration rates averaging 49.6±27.9 μl ind−1 h−1. Corresponding values for mesozooplankton were an order of magnitude lower (ingestion=0.0007±0.0005 μg CHLa ind−1 day−1; filtration=4.2±1.7 ml−1 ind−1 day−1). Per capita ingestion rates for macrozooplankton were higher at the tidal freshwater sites but inter-site differences were not statistically significant. Community ingestion rates derived from the product of per capita values and in situ densities were highest at the site of the CHLa maximum (JMS75=0.691 μg CHLa L−1 day−1) and lower at JMS99 (mean=0.272 μg CHLa L−1 day−1) and JMS21 (mean=0.139 μg CHLa L−1 day−1). Inter-site differences were not significant owing to high intrasite variability (average CV=45%) and low power (two to three dates per site). Ingestion rates expressed as a proportion of in situ CHLa ranged from 1.0% to 2.3% with lowestaverage values at the CHLa maxima. Overall, these findings suggest that although zooplankton densities were higher at the CHLa maximum, phytoplankton losses due to grazing were low and similar at all sites.