Reading: Metals in fish and shellfish from Lake Illawarra, New South Wales, Australia

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Metals in fish and shellfish from Lake Illawarra, New South Wales, Australia

Authors:

Paul L. Brown ,

Vincent J. Carolan,

Deborah J. Hafey,

Machiko Iko,

Scott J. Markich,

R. John Morrison

Abstract

Fish (dusky flathead – Platycephalalus fuscus and luderick – Girella tricuspidata) and shellfish (Anadara trapezia and Saccostrea commercialis) samples from Lake Illawarra in south-eastern Australia were collected in 1993 and 2000 and analysed for a range of metals. Sediments with which the shellfish were in contact were also examined. The results were compared with shellfish data collected in 1976 and in an independent study in 1993. No reported data were available for comparison with the fish metal results. The results showed that trace metal concentrations in both fish and shellfish were generally low and represented minimal health risk. The dusky flathead, a predator species, had detectable concentrations of mercury, while the luderick, a herbivore, had values below detection limits. Metal concentrations in shellfish were in general agreement with those found in other studies, and showed that no apparent changes were occurring over time, except those that could be explained by changes in the age of the shellfish. Only copper in Lake Illawarra oysters showed greater concentrations than found in other south-eastern Australian estuaries. It is recommended that future studies focus on organic and microbial contamination.
How to Cite: Brown, P.L., Carolan, V.J., Hafey, D.J., Iko, M., Markich, S.J. and Morrison, R.J., 2006. Metals in fish and shellfish from Lake Illawarra, New South Wales, Australia. Wetlands Australia, 21(2), pp.pp. 228–237. DOI: http://doi.org/10.31646/wa.274
Published on 28 Feb 2006.
Peer Reviewed

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