Abstract：
:Intermolt crab Carcinus maenas and clam Ruditapes philippinarum were used to determine the toxicity of sediments collected in four Spanish ports (Cádiz, Huelva, Pasajes, and Bilbao) under laboratory conditions during 28 days. Sediment samples were analyzed to determine chemical concentration of metals (As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn), polyaromatic hydrocarbons, polychlorinated biphenyls, grain size distribution, and organic matter content. Different biomarkers of exposure of early biological stress were determined after 28-day exposure in crabs and clams, in the hepatopancreas and in the digestive gland, respectively: metallothionein, ethoxyresorufin O-deethylase (EROD), glutathione peroxidase (GPX), glutathione S-transferase (GST), and glutathione reductase activities (GR). The battery of biomarkers tested resulted in showing and linking the bioavailability of various contaminants and sediment characteristics to the toxicity of the different sediments. Significant induction of MTs was observed when organisms were exposed to metal-contaminated sediments (port of Huelva), and induction of EROD and GPX activities after exposure to sediments containing organic compounds (port of Bilbao and Pasajes). Higher induction was shown in biomarkers tested in crabs; nevertheless, only interspecies significant differences were observed in the induction of GR and GST activities. The present work confirms the necessity of using species with different ecological lifestyles for sediment toxicity assessment and validates the use of this set of biomarkers as a potential tool in sediment toxicity assessment.
journal_name
Arch Environ Contam Toxicoljournal_title
Archives of environmental contamination and toxicologyauthors
Martín-Díaz ML,Blasco J,Sales D,Delvalls TAdoi
10.1007/s00244-006-0121-4subject
Has Abstractpub_date
2007-07-01 00:00:00pages
66-76issue
1eissn
0090-4341issn
1432-0703journal_volume
53pub_type
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