Dispersal and assimilation of an aquaculture waste subsidy in a low productivity coastal environment
CA White, PD Nichols, DJ Ross, T Dempster
MARINE POLLUTION BULLETIN | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2017
To understand dispersal and assimilation of aquaculture waste subsidies in a naturally low-productivity environment, we applied a novel, rapid transmethylation technique to analyse sediment and biota fatty acid composition. This technique was initially validated at Atlantic salmon farms in Macquarie Harbour, Australia, where sediments were collected at farm and control locations. Subsequently, sediment, benthic polychaete and zooplankton were sampled at sites 0, 50, 250, 500 and 1000m distant from multiple cages. Results demonstrated an acute deposition zone up to 50m from cages and a diffuse zone extending 500m from cages. Changes in sediment concentration of linoleic acid, oleic acid and t..View full abstract
This study was supported by the Sustainable Aquaculture Laboratory, University of Melbourne. Additional financial support was provided by a Holsworth Wildlife Research Endowment and a CSIRO Wealth from Oceans Flagship scholarship. Field support was provided by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania. We thank A. Pender, M. Sievers and J. Valentine for assistance in collecting samples, and Peter Mansour for management of the GC facility.