期刊
ENVIRONMENTAL POLLUTION
卷 157, 期 3, 页码 959-967出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2008.10.019
关键词
Liza aurata; Antioxidant defences; Metallothioneins; Oxidative stress; Genotoxicity
资金
- Funda Ao para a Ciencia e Tecnologia FCT (Government of Portugal) [POCI/MAR/61195/2004, SFRH/BD/27584/2006, SFRH/BPD/26970/2006, SFRH/BPD/34326/2006]
- CESAM - Aveiro University Research Institute
- Fundação para a Ciência e a Tecnologia [POCI/MAR/61195/2004, SFRH/BPD/26970/2006, SFRH/BD/27584/2006] Funding Source: FCT
Fish gill importance in toxicants uptake, bioconcentration and excretion allied to meagre knowledge on branchial damage/protection responses substantiate this study. Five critical sites in Ria de Aveiro (Portugal) were assessed in comparison with a reference site (Torreira), focusing on Liza aurata gill antioxidant defences versus damage (oxidative and genetic). Only in Barra fish displayed damage (lipid peroxidation) though no differences were found in antioxidants. In all other sites, except Rio, antioxidant alterations were found. Thus, fish from Gafanha, Laranjo and Vagos showed higher total glutathione, glutathione peroxidase and catalase. Higher glutathione reductase and glutathione S-transferase activity was also found in the first and the last sites, respectively. In Laranjo, metallothionein levels were higher though lower in Gafanha and Vagos. In general, damage was not accompanied by defences weakening confirming that predicting damage based on antioxidants depletion is not straightforward. The integrated biomarker response index ranked sites as: Gafanha > Barra > Laranjo > Vagos > Rio > Torreira. (C) 2008 Elsevier Ltd. All rights reserved.
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