| field validation of a battery of biomarkers to assess sediment quality in spanish ports. | two marine invertebrates, the crab carcinus maenas and the clam ruditapes philippinarum, were used as bioindicator species to assess contamination when exposed in situ to sediment from different sites from four spanish ports cadiz (sw spain), huelva (sw spain), bilbao (ne spain) and pasajes (ne spain). in an attempt to determine sediments toxicity, a combination of exposure biomarkers was analyzed in both species: metallothionein-like-proteins (mtlps), ethoxyresorufin o-deethylase (erod), glutat ... | 2008 | 17582664 |
| the influence of ph and salinity on the toxicity of heavy metals in sediment to the estuarine clam ruditapes philippinarum. | an approach is presented for determining the influence of two key variables, ph and salinity (s), on the toxicity of four common heavy metals bound to sediments in estuaries. two samples of environmental sediment taken from two estuaries in southern spain (the huelva estuary and the guadalquivir river estuary), together with a dilution of toxic mud from the aznalcóllar (spain) mining spill (april 1998) were used to determine their toxicity at different values of ph (6.5, 7.5, and 8.5) and salini ... | 2004 | 15180359 |
| sediment quality in the atlantic coast of spain. | sediments from the atlantic coast of spain have been studied to evaluate environmental quality by using an integrated approach including chemical and toxicological data. sediment samples were collected in four littoral ecosystems located in spain, bay of cádiz, guadalquivir river estuary, ría of huelva, and ría of coruña. to characterize the sediments, organic carbon, granulometric content, total sulfide, eight trace metals (hg, cd, pb, cu, zn, as, ni, and cr), polychlorinated biphenyls (pcbs), ... | 2004 | 14982372 |
| seasonality of contamination, toxicity, and quality values in sediments from littoral ecosystems in the gulf of cádiz (sw spain). | to seasonally evaluate littoral contamination, toxicity and quality values of sediments from the gulf of cádiz, we measured chemical concentrations and conducted toxicity tests in winter and summer and linked these results by means of multivariate analysis. sediment samples were subjected to two separate, replicated sediment toxicity tests (microdeutopus gryllotalpa amphipod survival, and ruditapes philippinarum clam reburial), and to comprehensive sediment chemistry analyses (grain size, organi ... | 2002 | 11999767 |
| accumulation and histopathological damage in the clam ruditapes philippinarum and the crab carcinus maenas to assess sediment toxicity in spanish ports. | the degree of contamination and toxicity in sediment from four spanish ports (cádiz, huelva, pasajes and bilbao) was assessed in the present study. two marine invertebrate species, the shore crab carcinus maenas and the clam ruditapes philippinarum, were exposed to the different sediments under laboratory conditions for 28 days. relationships were developed among metal contamination (as, cd, cr, cu, fe, hg, mn, ni, pb and zn) in sediments, metal accumulation in gill tissues and histopathological ... | 2008 | 18313100 |
| biomarkers study for sediment quality assessment in spanish ports using the crab carcinus maenas and the clam ruditapes philippinarum. | 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 bi ... | 2007 | 17502980 |
| distribution of butyltins (tbt, dbt, mbt) in sediments of gulf of cádiz (spain) and its bioaccumulation in the clam ruditapes philippinarum. | surface sediment samples were analyzed for organotins namely tributyltin (tbt), dibutyltin and monobutyltin from six areas located in the gulf of cádiz (14 stations), spain. the total butyltin ranged between undetected and 1,580 ng sn g(-1). tbt generally prevailed in most of the samples, suggesting fresh inputs of butyltin compounds and/or less degradation of tbt. the observed levels of butyltins at several sites are much higher than that required to induce toxic effect on marine organisms, sug ... | 2009 | 19618267 |