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dc.contributor.authorFinkelstein, M. E.
dc.contributor.authorGeorge, D.
dc.contributor.authorScherbinski, S.
dc.contributor.authorGwiazda, R.
dc.contributor.authorJohnson, M.
dc.contributor.authorBurnett, J.
dc.contributor.authorBrandt, J.
dc.contributor.authorLawrey, S.
dc.contributor.authorPessier, Allan P.
dc.contributor.authorClark, M.
dc.contributor.authorWynne, J.
dc.contributor.authorGrantham, J.
dc.contributor.authorSmith, D. R.
dc.contributor.editor
dc.date.accessioned2021-03-26T23:36:38Z
dc.date.available2021-03-26T23:36:38Z
dc.date.issued2010
dc.identifier.issn0013-936X, 1520-5851
dc.identifier.doi10.1021/es903176w
dc.identifier.urihttp://hdl.handle.net/20.500.12634/984
dc.description.abstractLead poisoning is a primary factor impeding the survival and recovery of the critically endangered California Condor (Gymnogyps californianus). However, the frequency and magnitude of lead exposure in condors is not well-known in part because most blood lead monitoring occurs biannually, and biannual blood samples capture only ?10% of a bird’s annual exposure history. We investigated the use of growing feathers from free-flying condors in California to establish a bird’s lead exposure history. We show that lead concentration and stable lead isotopic composition analyses of sequential feather sections and concurrently collected blood samples provided a comprehensive history of lead exposure over the 2?4 month period of feather growth. Feather analyses identified exposure events not evident from blood monitoring efforts, and by fitting an empirically derived timeline to actively growing feathers, we were able to estimate the time frame for specific lead exposure events. Our results demonstrate the utility of using sequentially sampled feathers to reconstruct lead exposure history. Since exposure risk in individuals is one determinant of population health, our findings should increase the understanding of population-level effects from lead poisoning in condors; this information may also be helpful for other avian species potentially impacted by lead poisoning.
dc.language.isoen
dc.relation.urlhttps://doi.org/10.1021/es903176w
dc.rightsCopyright © 2010 American Chemical Society
dc.subjectCALIFORNIA CONDORS
dc.subjectTOXICOLOGY
dc.subjectENDANGERED ANIMALS
dc.subjectHEALTH
dc.subjectFEATHERS
dc.subjectWILDLIFE CONSERVATION
dc.titleFeather lead concentrations and 207Pb/20Ppb ratios reveal lead exposure history of California condors (Gymnogyps californianus)
dc.typeArticle
dc.source.journaltitleEnvironmental Science & Technology
dc.source.volume44
dc.source.issue7
dc.source.beginpage2639
dc.source.endpage2647
html.description.abstractLead poisoning is a primary factor impeding the survival and recovery of the critically endangered California Condor (Gymnogyps californianus). However, the frequency and magnitude of lead exposure in condors is not well-known in part because most blood lead monitoring occurs biannually, and biannual blood samples capture only ?10% of a bird’s annual exposure history. We investigated the use of growing feathers from free-flying condors in California to establish a bird’s lead exposure history. We show that lead concentration and stable lead isotopic composition analyses of sequential feather sections and concurrently collected blood samples provided a comprehensive history of lead exposure over the 2?4 month period of feather growth. Feather analyses identified exposure events not evident from blood monitoring efforts, and by fitting an empirically derived timeline to actively growing feathers, we were able to estimate the time frame for specific lead exposure events. Our results demonstrate the utility of using sequentially sampled feathers to reconstruct lead exposure history. Since exposure risk in individuals is one determinant of population health, our findings should increase the understanding of population-level effects from lead poisoning in condors; this information may also be helpful for other avian species potentially impacted by lead poisoning.


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    Peer reviewed and scientific works by San Diego Zoo Wildlife Alliance staff. Includes books, book sections, articles and conference publications and presentations.

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