Data/hora: 04/06/2024 02:56:55

Provedor de dados: 	5	
País: 	France	
Título: 	Effects of water accommodated fractions of crude oils and diesel on a suite of biomarkers in Atlantic cod (Gadus morhua)	
Autores: 	Holth, T. F.; Eidsvoll, D. P.; Farmen, E.; Sanders, M. B.; Martinez-gomez, C.; Budzinski, H.; Burgeot, Thierry; Guilhermino, L.; Hylland, K.	
Data: 	2014-09	
Ano: 	2014	
Palavras-chave: 	Atlantic cod; Biomarkers; Weathered crude oil; Ship-diesel; Water accommodated fraction; Time-course.	
Resumo: 	The aim of this study was to characterise concentration- and time-dependent responses in juvenile Atlantic cod (Gadus morhua) following exposure for one and three weeks to the water-soluble fraction (WAF) of three weathered oils: Arabian Light crude oil (ALC), North Sea crude oil (NSC) and ship-diesel. The sum of polycyclic aromatic hydrocarbons (PAH) in water was highest after one week of exposure and within environmentally relevant concentrations. PAH metabolites in bile confirmed exposure to and uptake of PAHs. Hepatic cytochrome P450 1A (CYP1A) gene expression (here and later the phrase gene expression is used synonymously to gene transcription, although it is acknowledged that gene expression is also regulated by, e.g., translation and protein stability) increased dramatically following exposure to all three oil types (fold-change up to 165), and there was a time lag between gene and protein expression. Hepatic CYP1A protein concentration and ethoxyresorufin-O-deethylase (EROD) activity were however more variable among individuals and treatments than gene expression. Hepatic and gill EROD increased in fish exposed to WAF from the two crude oils, but not in fish exposed to WAF from diesel. Exposure to diesel appeared to induce oxidative stress to a larger extent than exposure to crude oils. Other biomarkers (glutathione S-transferases, acetylcholine esterase, vitellogenin) did not appear to respond to the exposure and hence did not discriminate among oils. Biomarker responses in cod after exposure to weathered crude oils and diesel suggested the CYP1A system and oxidative stress markers to have the highest potential for discriminating among different oil types and to monitor the environmental consequences of spills.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00190/30131/28593.pdf

DOI:10.1016/j.aquatox.2014.05.013

http://archimer.ifremer.fr/doc/00190/30131/	
Editor: 	Elsevier Science Bv	
Formato: 	application/pdf	
Fonte: 	Aquatic Toxicology (0166-445X) (Elsevier Science Bv), 2014-09 , Vol. 154 , P. 240-252	
Fonte: 	2014 Elsevier B.V. All rights reserved.

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