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Influence of diet in the accumulation of organochlorine compounds in herons breeding in remote riverine environments.
Huertas, David; Grimalt, Joan O; Jover, Lluis; Sanpera, Carola.
Afiliación
  • Huertas D; Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Catalonia, Spain.
  • Grimalt JO; Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Catalonia, Spain. Electronic address: joan.grimalt@idaea.csic.es.
  • Jover L; Department of Public Health, Faculty of Medicine, University of Barcelona, Casanova 143, 08036 Barcelona, Catalonia, Spain.
  • Sanpera C; Department of Animal Biology, Faculty of Biology, University of Barcelona, Av. Diagonal 645, 08028 Barcelona, Catalonia, Spain.
Chemosphere ; 145: 438-44, 2016 Feb.
Article en En | MEDLINE | ID: mdl-26694793
The composition of organochlorine compounds (OCs), pentachlorobenzene (PeCB), hexachlorobenzene (HCB), hexachlorocyclohexanes (HCHs), DDTs and polychlorobiphenyls (PCBs), has been analyzed in eggs from cattle egret (Bubulcus ibis) and little egret (Egretta garzetta), two species of herons (family Ardeidae), nesting at the same remote riverine environment (Aiguabarreig, Ebro River). These two species were selected to evaluate the importance of diet in the accumulation of OCs. Cattle egret essentially feeds on dry grassy habitats and follow cattle or other large animals whereas little egret feeds on fish, amphibians and crustaceans captured in shallow waters. The δ(15)N and δ(13)C isotopic composition of the sampled eggs was studied and the results were consistent with these species feeding habits. In both species, the compounds accumulated the most were the less volatile and more lipophilic, e.g. PCB congeners of higher chlorination, DDT and metabolites. The distinct foraging species preferences were reflected in significant higher concentrations in little egret than cattle egret of all pollutant groups analysed. These differences were statistically significant for DDTs and PCBs (p < 0.015 and p < 0.047, respectively), e.g. the p,p'-DDE and PCB concentrations were 6 and 4.5 times higher, respectively, in the former than the latter. This strong contrast indicates that in remote environments aquatic riverine ecosystems are more efficient OC reservoirs than the terrestrial ecosystem.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Aves / Dieta / Hidrocarburos Clorados Límite: Animals País/Región como asunto: Europa Idioma: En Revista: Chemosphere Año: 2016 Tipo del documento: Article País de afiliación: España Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Aves / Dieta / Hidrocarburos Clorados Límite: Animals País/Región como asunto: Europa Idioma: En Revista: Chemosphere Año: 2016 Tipo del documento: Article País de afiliación: España Pais de publicación: Reino Unido