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Spatial variability in selenium and mercury interactions in a key recreational fish species: Implications for human health and environmental monitoring

journal contribution
posted on 2023-05-17, 21:40 authored by Jones, H, Butler, ECV, Catriona MacLeodCatriona MacLeod
Selenium's (Se) protective effects against mercury (Hg) toxicity have been demonstrated; however, this is seldom considered in health assessments, where dietary exposure is still evaluated by Hg concentration alone. Se:Hg ratios and selenium health benefit values (Se HBVs) offer a more comprehensive seafood safety model. Here we describe total mercury (THg), methylmercury (MeHg) and Se concentrations in fish from a Hg-polluted estuary. Spatial variation in THg, MeHg and Se was evident, though all regions maintained Se:Hg ratio values >1. Se HBV varied between regions and in one region mean negative values (-5.17) were evident. This study provides the first evidence that quoting a single all-encompassing Se HBV is not appropriate when species demonstrate strong site fidelity. It highlights the need for research into Se-Hg relationships in environments with established Hg pollution and reinforces the assertion that Se concentration be considered in assessments of human health risk to Hg exposure.

History

Publication title

Marine Pollution Bulletin: The International Journal for Marine Environmentalists, Scientists, Engineers, Administrators, Politicians and Lawyers

Volume

74

Pagination

231-236

ISSN

0025-326X

Department/School

Institute for Marine and Antarctic Studies

Publisher

Pergamon-Elsevier Science Ltd

Place of publication

The Boulevard, Langford Lane, Kidlington, Oxford, England, Ox5 1Gb

Rights statement

Copyright 2013 Elsevier Ltd.

Repository Status

  • Restricted

Socio-economic Objectives

Assessment and management of terrestrial ecosystems

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