Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/17558
Título: An evaluation of the use of reptile dermal scutes as a non-invasive method to monitor mercury concentrations in the environment
Autor: Schneider, Larissa
Eggins, Sam
Maher, William A.
Vogt, Richard Carl
Krikowa, Frank
Kinsley, Leslie P.J.
Eggins, Stephen M.
Silveira, Ronis da
Palavras-chave: Ablation
Bioaccumulation
Biochemistry
Bone
Keratin
Laser Ablation
Mercury (metal)
Muscle
Noninvasive Medical Procedures
Amazon
Caiman
Carapace
Laser-ablation-icp-ms
Mercury Concentrations
Non-invasive Monitoring
Noninvasive Methods
Turtle
Tissue Engineering
Keratin
Mercury
Fresh Water
Keratin
Mercury
Pollutant
Ablation
Bioaccumulation
Bone
Mercury (element)
Mining Industry
Muscle
Sediment Pollution
Turtle
Animals Tissue
Bioaccumulation
Bone Tissue
Caiman
Caiman Crocodilus
Chemical Analysis
Contamination
Dermis
Melanosuchus Niger
Muscle Tissue
Nonhuman
Podocnemis Expansa
Podocnemis Unifilis
Reptile
Turtle
Analysis
Animals
Bone
Chemistry
Comparative Study
Crocodilian
Environmental Monitoring
Epidermis
Evaluation Study
Mass Spectrometry
Metabolism
Pharmacokinetics
Pollutant
Procedures
Muscle, Skeletal
Amazonia
Caiman
Caiman Crocodilus
Melanosuchus Niger
Podocnemis Expansa
Podocnemis Unifilis
Reptilia
Testudines
Alligators And Crocodiles
Animal
Bone And Bones
Environmental Monitoring
Environmental Pollutants
Epidermis
Fresh Water
Keratins
Mass Spectrometry
Mercury
Muscle, Skeletal
Turtles
Data do documento: 2015
Revista: Chemosphere
É parte de: Volume 119, Pags. 163-170
Abstract: Reptiles are ideal organisms for the non-invasive monitoring of mercury (Hg) contamination. We have investigated Hg bioaccumulation in tissue layers of reptile dermis as a basis for establishing a standardized collection method for Hg analysis. Tissue samples from freshwater turtle species Podocnemis unifilis and Podocnemis expansa and caiman species Melanosuchus niger and Caiman crocodilus, all from the Amazonian region, were analysed in this study. We first tested the relationships between Hg concentrations in keratin and bone to Hg concentrations in muscle to determine the best predictor of Hg concentration in muscle tissue. We then investigated the potential for measuring Hg concentrations across turtle carapace growth rings as an indicator of longer term changes in Hg concentration in the environment. Hg concentrations were significantly lower in bone (120ngg-1 caimans and 1ngg-1 turtles) than keratin (3600ngg-1 caimans and 2200ngg-1 turtles). Keratin was found to be a better predictor of exposure to Hg than muscle and bone tissues for both turtles and caimans and also to be a reliable non-invasive tissue for Hg analysis in turtles. Measurement of Hg in carapace growth rings has significant potential for estimating Hg bioaccumulation by turtles over time, but full quantification awaits development and use of a matrix-matched reference material for laser ablation ICPMS analysis of Hg concentrations in keratin. Realising this potential would make a valuable advance to the study of the history of contamination in mining and industrial sites, which have until now relied on the analysis of Hg concentrations in sediments. © 2014 Elsevier Ltd.
DOI: 10.1016/j.chemosphere.2014.05.065
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