Incidence of organochlorine pesticide and PCB residues in an aquatic ecosystem of river duero in castile and Leon (Spain) |
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| Authors: | J L Bernal Ma J Del Nozal J J Jiménez |
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| Institution: | Department of Analytical Chemistry, Faculty of Sciences , University of Valladolid , Prado de la Magdalena s/n, Valladolid, 47005, Spain |
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| Abstract: | The occurrence of organochlorine pesticides and polychlorinated biphenyls (PCBs) in an aquatic ecosystem of River Duero was checked by means of a bioindicator organism: the grey heron (Ardea cinerea). Analyses of water, sediments, fish fat tissues and heron viscera revealed a marked bioaccumulation of organochlorine compounds, particularly hexa‐ and heptachlorinated biphenyls of industrial origin, which may account for the gradual decline in the number of individuals that make up the heron colonies studied. |
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| Keywords: | Organochlorine compounds grey heron River Duero ecosystem |
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