Metal and metalloid concentrations in the tissues of dusky Carcharhinus obscurus, sandbar C-plumbeus and white Carcharodon carcharias sharks from south-eastern Australian waters, and the implications for human consumption
Jann M Gilbert, Amanda J Reichelt-Brushett, Paul A Butcher, Shane P McGrath, Victor M Peddemors, Alison C Bowling, Les Christidis
Marine Pollution Bulletin | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2015
Shark fisheries have expanded due to increased demand for shark products. As long-lived apex predators, sharks are susceptible to bioaccumulation of metals and metalloids, and biomagnification of some such as Hg, primarily through diet. This may have negative health implications for human consumers. Concentrations of Hg, As, Cd, Cu, Fe, Se and Zn were analysed in muscle, liver and fin fibres (ceratotrichia) from dusky Carcharhinus obscurus, sandbar Carcharhinus plumbeus, and white Carcharodon carcharias sharks from south-eastern Australian waters. Concentrations of analytes were generally higher in liver than in muscle and lowest in fin fibres. Muscle tissue concentrations of Hg were signifi..View full abstract
Thanks are due to NSW Department of Primary Industries (DPI) for provision of samples from the OTLF through research conducted via support from the Fisheries Research and Development Corporation on behalf of the Australian Government, and the Shark Meshing Program. Sample collection was approved by NSW DPI Animal Care and Ethics Committee (Refs. 12/19 and 10/06), and approval for this study was granted by Southern Cross University Animal Care and Ethics Committee (Ref. 13/12). This study was also generously supported by grants from the Norman Wettenhall Foundation and the George Lewin Foundation, and in-kind support from EAL. Additional funding was provided by the School of Environment, Science and Engineering, and the Marine Ecology Research Centre, Southern Cross University.