Aquafin CRC Salmon Project - Process Study 2- Microheterotrophic Grazing Experiment - Huon Estuary - September 2005

The Aquafin CRC Salmon Project is being undertaken by CSIRO Marine and Atmospheric Research (CMAR) and Tasmanian Aquaculture and Fisheries Institute (TAFI). Process Study 2 was undertaken between 21-22 September 2005 in the Huon Estuary offshore from Hideaway Bay. Prior to each microheterotroph grazing experiment, a CTD cast was performed at site P3 using the Seaboard 4550 to determine the depth of the fluorescence maximum. Water for a grazing experiment was collected from a depth of 2 m on the 21 September 2005 Samples were incubated for 24 hours with subsamples collected at times T0 and T24 for phytoplankton and microheterotroph counts, nutrient analysis and pigment concentration and composition. Grazing and growth rates were calculated.