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Title

Evaluation of Heavy Metal SedimentToxicity in Littoral Ecosystems Using Juveniles of the Fish Sparus aurata

AuthorsDel Valls, T. A.; Blasco, Julián ; Sarasquete, Carmen ; Forja, Jesús M.; Gómez-Parra, Abelardo
KeywordsHeavy metal sediment
Toxicity
Littoral ecosystems
Sparus aurata
Gulf of Cadiz
Issue DateOct-1998
PublisherElsevier
Academic Press
CitationEcotoxicology and Environmental Safety 41(2): 157-167 (1998)
AbstractThe toxicity of sediments from two littoral ecosystems of the Gulf of Cadiz was tested using juveniles of the fishSparusaurata(seabream). Concentrations of total carbon and nitrogen, organic carbon, 14 heavy metals (Fe, Mn, Cu, Zn, Pb, Cd, Ag, Hg, As, Sn, V, Ni, Co, Cr), and the surfactant linear alkyl benzenesulfonate (LAS) in the sediments were measured. Chemical analysis was performed in the stations to determine the degree and nature of contamination. Four different endpoints were selected in the toxicity test: survival, superficial alteration, hematocrit analysis, and histological damage. After 14 days, survival, superficial alteration, and hematocrit analysis did not reveal effects of the different sediments tested. The histological and cellular damage revealed a more sensitive response to measured chemicals in sediments and they were found to be a powerful tool to evaluate sedimenttoxicity effects. Semiquantitative evaluation of the histological damage demonstrated correlation with sediment concentrations of some of the heavy metals (Cr, Cd, Pb, Ag, Cu) and the surfactant (LAS). Data derived from chemical concentrations and toxicity tests were assembled by multivariate statistical techniques (principal components analysis) to identify the ranges of chemical concentrations associated with an adverse effect. The results obtained, as suggested by site-specific sediment quality values, were the following: Cr≥90.2; Cd≥1.24; Pb≥52.5; Ag≥0.68; Cu≥71.2; LAS≥8.7 mg kg−1of dry sediment. These results are mainly in concordance with studies performed in other areas of the world and therefore support wide application of the method.
Description11 páginas, 6 figuras, 6 tablas.
Publisher version (URL)http://dx.doi.org/10.1006/eesa.1998.1680
URIhttp://hdl.handle.net/10261/43235
DOI10.1006/eesa.1998.1680
ISSN0147-6513
E-ISSN1090-2414
Appears in Collections:(ICMAN) Artículos
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