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Long term trends of Hg uptake in resident fish from a polluted estuary
Citation
Jones, H and Swadling, KM and Tracey, S and MacLeod, C, Long term trends of Hg uptake in resident fish from a polluted estuary, Marine Pollution Bulletin, 73, (1) pp. 263-272. ISSN 0025-326X (2013) [Refereed Article]
Copyright Statement
Copyright 2013 Elsevier
DOI: doi:10.1016/j.marpolbul.2013.04.032
Abstract
Mercury contamination of fish is dependent upon a system’s ability to transform inorganic Hg into biologically
available forms; however, fish biometrics also play an important role. To assess long term trends
in Hg concentrations in sand flathead (Platycephalus bassensis) a polynomial model, corrected for fish
length, was used to evaluate temporal trends and spatial variability, while growth rates were estimated
using the Von Bertalanffy length-at-age model. Hg concentrations showed no decrease over time, and
generally remained near recommended consumption levels (0.5 mg kg1). Previously reported spatial differences
in Hg concentrations were not supported by the data once the models were corrected for fish
length. Growth rate variation accounted for a large part of the previously published spatial differences.
These results suggest that inclusion of fish biometrics is necessary to facilitate an accurate interpretation
of spatial and temporal trends of contaminant concentrations in long term estuarine and marine monitoring
programs.
Item Details
Item Type: | Refereed Article |
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Keywords: | Mercury bioaccumulation Biometric modelling Von Bertalanffy growth curves Long term monitoring Estuarine management |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Fisheries sciences |
Research Field: | Aquaculture and fisheries stock assessment |
Objective Division: | Environmental Management |
Objective Group: | Terrestrial systems and management |
Objective Field: | Assessment and management of terrestrial ecosystems |
UTAS Author: | Jones, H (Mr Hugh Jones) |
UTAS Author: | Swadling, KM (Associate Professor Kerrie Swadling) |
UTAS Author: | Tracey, S (Associate Professor Sean Tracey) |
UTAS Author: | MacLeod, C (Associate Professor Catriona MacLeod) |
ID Code: | 85791 |
Year Published: | 2013 |
Web of Science® Times Cited: | 13 |
Deposited By: | Sustainable Marine Research Collaboration |
Deposited On: | 2013-08-08 |
Last Modified: | 2014-04-14 |
Downloads: | 0 |
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