title: Biochemical responses of the shore crab (Carcinus maenas) in a eutrophic and metal-contaminated coastal system (Obidos lagoon, Portugal).
abstract: A eutrophic and metal-contaminated coastal system (Obidos lagoon, Portugal) was monitored combining water/sediment quality parameters and Carcinus maenas biomarkers (accumulated metals, oxidative stress and biotransformation responses). Two confined branches (Barrosa and Bom-Sucesso) were surveyed and compared with a reference area. Both crab genders from Barrosa exhibited activation of hepatopancreas CAT, GPx and GST, pointing out this area as the major impacted in the lagoon. Females captured at Barrosa were more vulnerable to peroxidative damage while only males showed decreased EROD activity, reinforcing gender specificities. In general, responses were not directly attributed to metals in hepatopancreas, as supported by Principal Component Analysis (PCA). However, higher metals (Ni, Cu, Cd) and nutrients levels registered in Barrosa water were associated with the observed oxidative stress responses by PCA. Despite the difficulty to establish cause-effect relationships due to the co-occurrence of various stressors and their interactions, the adopted integrated monitoring strategy appears to be promising.
authors.affiliation: IPIMAR and National Institute of Biological Resources, Lisbon, Portugal. patbio@ipimar.pt
authors.forename: Patrícia
authors.initials: P
authors.lastname: Pereira
authors.forename: Hilda
authors.initials: H
authors.lastname: de Pablo
authors.forename: Maria
authors.initials: M
authors.lastname: Dulce Subida
authors.forename: Carlos
authors.initials: C
authors.lastname: Vale
authors.forename: Mário
authors.initials: M
authors.lastname: Pacheco
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D001711:Biotransformation; D001822:Body Burden; D003386:Brachyura / Q000187:drug effects* / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D019363:Cytochrome P-450 CYP1A1 / Q000378:metabolism; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods; D005068:Eutrophication; D005260:Female; D019015:Geologic Sediments / Q000737:chemistry; D005979:Glutathione Peroxidase / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D043143:Hepatopancreas / Q000187:drug effects / Q000201:enzymology; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D008670:Metals / Q000378:metabolism / Q000633:toxicity*; D018384:Oxidative Stress / Q000187:drug effects; D011174:Portugal; D025341:Principal Component Analysis; D012623:Seawater / Q000737:chemistry; D012727:Sex Characteristics; D014873:Water Pollutants / Q000378:metabolism / Q000633:toxicity*
chemical_list: D015415:Biomarkers; D008670:Metals; D014873:Water Pollutants; D002374:Catalase; D005979:Glutathione Peroxidase; D019363:Cytochrome P-450 CYP1A1; D005982:Glutathione Transferase