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Dosing of adult pigeons with as little as one #9 lead pellet caused severe δ-ALAD depression, suggesting potential adverse effects in wild populations.
MedLine Citation:
PMID:  22903291     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Avian wildlife species commonly ingest lead (Pb) spent shot or bullet fragments as grit or mistakenly as food. In previous studies in our laboratory and others, the toxicity varied based on the diet as well as type and quantity of Pb ingested. In the current study, domestic pigeons were gavaged with 1, 2, or 3 Pb pellets and then followed with weekly radiographs and blood physiologic endpoints for 28 days. Pellet retention decreased by roughly 50 % per week as pellets were either absorbed or excreted, except for week 4 where pellet number no longer was diminished. Size of retained pellets visually decreased over retention time. Birds dosed with a single #9 pellet showed mean blood Pb levels over 80 times higher than those of the controls, verifying Pb pellet absorption from the gut. A single Pb pellet also reduced plasma δ-aminolevulinic acid dehydratase (δ-ALAD) activity by over 80 % compared to controls, suggesting the potential for population injury in Pb pellet-exposed pigeons.
Authors:
Jeremy P Holladay; Mandy Nisanian; Susan Williams; R Cary Tuckfield; Richard Kerr; Timothy Jarrett; Lawrence Tannenbaum; Steven D Holladay; Ajay Sharma; Robert M Gogal
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-18
Journal Detail:
Title:  Ecotoxicology (London, England)     Volume:  -     ISSN:  1573-3017     ISO Abbreviation:  Ecotoxicology     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9885956     Medline TA:  Ecotoxicology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Biosciences and Diagnostic Imaging, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA.
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