| Blood lead levels and δ-ALAD inhibition in nestlings of Eurasian Eagle Owl (Bubo bubo) to assess lead exposure associated to an abandoned mining area. | |
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MedLine Citation:
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PMID: 21076940 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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In order to biomonitor lead contamination in Southeastern Spain, 218 blood samples from 28 to 30-day old Eurasian Eagle Owl chicks (Bubo bubo) born between 2003 and 2007 were analysed. In general, mean lead levels showed that chicks were exposed to background concentrations. However, mean levels in chicks born in an ancient and abandoned mining site ("Sierra Minera Cartagena-La Union") or in their surroundings (Geometric mean (GM) = 5.83 μg/dl, range 0.49-25.61 μg/dl), an area highly polluted by lead and other metals, were significantly higher (p < 0.001) than the rest of the population (GM = 1.66 μg/dl, range = Non detected-18.37 μg/dl). Because δ-ALAD activity is considered the best biomarker for lead exposure and effect in birds, the activity of this enzyme was also evaluated and correlated with lead levels in blood. In this study, low levels of blood lead inhibited δ-ALAD, even when lead concentrations were lower than the limits described by other authors in raptors. Adverse effects caused by this inhibition may occur when blood lead levels were above 15 μg/dl, although only eight chicks presented these concentrations in their blood. Sampling site also influenced enzymatic activity, since it decreased about 60% in the polluted area in relation to the rest. For all these reasons, further research regarding risk assessment for lead exposure in Eagle Owls nesting in the polluted area is advisable. Our results suggest that the Eurasian Eagle Owl can be considered a suitable sentinel animal for monitoring lead contamination and δ-ALAD activity can be used as a sensitive biomarker for lead exposure and effect in this species. |
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Authors:
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P Gómez-Ramírez; E Martínez-López; P María-Mojica; M León-Ortega; A J García-Fernández |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-11-13 |
Journal Detail:
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Title: Ecotoxicology (London, England) Volume: 20 ISSN: 1573-3017 ISO Abbreviation: Ecotoxicology Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-01-07 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9885956 Medline TA: Ecotoxicology Country: United States |
Other Details:
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Languages: eng Pagination: 131-8 Citation Subset: IM |
Affiliation:
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Department of Toxicology, Faculty of Veterinary Medicine, University of Murcia, Campus de Espinardo, 30100, Murcia, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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