首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Spatial variability in selenium and mercury interactions in a key recreational fish species: Implications for human health and environmental monitoring
Authors:HJ Jones  ECV Butler  CK Macleod
Institution:1. Institute for Marine and Antarctic Studies, University of Tasmania, Private bag 49, Hobart, TAS 7001, Australia;2. Australian Institute of Marine Science, PO Box 41775, Casuarina, NT 0811, Australia
Abstract: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.
Keywords:Platycephalus bassensis  Derwent Estuary  Seafood safety  Contaminant assessment  Se health benefit value (Se HBV)
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号