| Assessment of mercury and selenium concentrations in captive bottlenose dolphin's (Tursiops truncatus) diet fish, blood, and tissue. | |
| | |
MedLine Citation:
|
PMID: 22137650 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Concentrations of total mercury (Hg) and selenium (Se) were determined in diet fish and whole blood and tissue samples from seven bottlenose dolphins (Tursiops truncatus) housed at the National Aquarium Baltimore (NAB). In addition, concentrations of monomethylmercury (CH(3)Hg(+)) were determined in diet fish and dolphins' tissue samples. The data were compared with the values found in wild populations to better understand how the dietary Hg and Se uptake rates affect the Hg and Se levels in dolphins. The diet fish total Hg concentrations ranged between 14 and 47ngg(-1) and were markedly lower than for similar fish found in Florida, South Carolina, and other aquaria. CH(3)Hg(+) accounted for 85 to 91% of the total Hg found in diet fish. The diet fish Se concentrations ranged between 270 and 800ngg(-1), indicating excess molar concentrations of Se over Hg. The Hg concentration range in the blood of NAB dolphins was 27-117ngg(-1) and the concentrations were about one order of magnitude and several factors lower than the concentrations found in the blood of wild bottlenose dolphins in Florida and in South Carolina, respectively. The total Hg and CH(3)Hg(+) in tissue samples were also significantly lower than the reported values obtained from wild populations of bottlenose dolphins. The differences in the Hg concentrations in the dolphins' blood may be due to the different levels of Hg atmospheric deposition in the area where the dolphins' diet fish were found. The Se concentration range in the blood of NAB dolphins was 221-297ngg(-1) which was two factors lower than the values found in wild populations. The lower Hg levels, as well as higher Se:Hg molar ratios in the blood of NAB dolphins, suggest that NAB dolphins may be less susceptible to the potential neurotoxicity from the CH(3)Hg(+) in their blood. |
| | |
Authors:
|
Yong Seok Hong; Sue Hunter; Leigh A Clayton; Erik Rifkin; Edward J Bouwer |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-12-1 |
Journal Detail:
|
Title: The Science of the total environment Volume: - ISSN: 1879-1026 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
|
Created Date: 2011-12-5 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0330500 Medline TA: Sci Total Environ Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2011 Elsevier B.V. All rights reserved. |
Affiliation:
|
Department of Geography and Environmental Engineering, Johns Hopkins University, 3400 North Charles Street, Ames Hall 313, Baltimore, MD 21218, USA; National Aquarium Conservation Center in National Aquarium Baltimore, 501 East Pratt Street, Baltimore, MD 21202, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Health impact assessment and monetary valuation of IQ loss in pre-school children due to lead exposu...
Next Document: Nicotine occurrence in bottled mineral water: Analysis of 10 brands of water in Spain.