Assessment of non-invasive techniques for monitoring mercury concentrations in species of Amazon turtles

Larissa Guilhon, L Belger, Joanna Burger, Richard Vogt, Christian Jeitner, Jose Pacheco Peleja

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    This study determined the concentrations of mercury (Hg) in four tissues of six species of turtles from the Rio Negro in the Amazon Basin. For two species, blood and carapace tissues were correlated with concentrations in internal tissues to establish whether blood or carapace could serve as a non-lethal indicator of internal metal exposure or body burden. The four tissues' Hg levels were also correlated to turtle size and gender. The liver in five species of turtles had the highest concentration, followed by carapace, muscle, and blood. The exception was Chelus fimbriatus, which had a higher metal concentration in the muscle than carapace. Regarding the correlation between total Hg concentrations in tissues of the two species, no significant correlation was noted for Podocnemis erythrocephala. However, for Podocnemis sextuberculata significant correlation was found between muscle ÿ liver, muscle ÿ blood, and liver ÿ blood. For P. erythrocephala, there was a correlation between Hg concentration in carapace and turtle size. For P. sextuberculata, there was no marked correlation between Hg concentration and size, but concentration in muscle was significantly influenced by gender. The patterns of Hg accumulation in tissues of the five species followed those described for freshwater species and some species of sea turtles. The difference in C. fimbriatus may be a result of a different pattern of non-living keratin layers on the carapace tissue. The use of carapace to infer internal concentrations of Hg is common in freshwater and sea turtles, but in this study it was found that only blood might be a reliable indicator of Hg concentrations in liver and muscle tissues for P. sextuberculata. Thus blood may be used as a non-invasive method to study concentrations of Hg in liver and muscle of P. sextuberculata.
    Original languageEnglish
    Pages (from-to)238-250
    Number of pages13
    JournalToxicological and Environmental Chemistry
    Volume93
    Issue number2
    DOIs
    Publication statusPublished - 2011

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    Animal Shells
    Turtles
    Mercury
    turtle
    Muscle
    muscle
    Blood
    Tissue
    blood
    Muscles
    Liver
    Monitoring
    monitoring
    Fresh Water
    Metals
    gender
    Body Burden
    Keratin
    Keratins
    mercury

    Cite this

    Guilhon, Larissa ; Belger, L ; Burger, Joanna ; Vogt, Richard ; Jeitner, Christian ; Pacheco Peleja, Jose. / Assessment of non-invasive techniques for monitoring mercury concentrations in species of Amazon turtles. In: Toxicological and Environmental Chemistry. 2011 ; Vol. 93, No. 2. pp. 238-250.
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    Assessment of non-invasive techniques for monitoring mercury concentrations in species of Amazon turtles. / Guilhon, Larissa; Belger, L; Burger, Joanna; Vogt, Richard; Jeitner, Christian; Pacheco Peleja, Jose.

    In: Toxicological and Environmental Chemistry, Vol. 93, No. 2, 2011, p. 238-250.

    Research output: Contribution to journalArticle

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    T1 - Assessment of non-invasive techniques for monitoring mercury concentrations in species of Amazon turtles

    AU - Guilhon, Larissa

    AU - Belger, L

    AU - Burger, Joanna

    AU - Vogt, Richard

    AU - Jeitner, Christian

    AU - Pacheco Peleja, Jose

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    N2 - This study determined the concentrations of mercury (Hg) in four tissues of six species of turtles from the Rio Negro in the Amazon Basin. For two species, blood and carapace tissues were correlated with concentrations in internal tissues to establish whether blood or carapace could serve as a non-lethal indicator of internal metal exposure or body burden. The four tissues' Hg levels were also correlated to turtle size and gender. The liver in five species of turtles had the highest concentration, followed by carapace, muscle, and blood. The exception was Chelus fimbriatus, which had a higher metal concentration in the muscle than carapace. Regarding the correlation between total Hg concentrations in tissues of the two species, no significant correlation was noted for Podocnemis erythrocephala. However, for Podocnemis sextuberculata significant correlation was found between muscle ÿ liver, muscle ÿ blood, and liver ÿ blood. For P. erythrocephala, there was a correlation between Hg concentration in carapace and turtle size. For P. sextuberculata, there was no marked correlation between Hg concentration and size, but concentration in muscle was significantly influenced by gender. The patterns of Hg accumulation in tissues of the five species followed those described for freshwater species and some species of sea turtles. The difference in C. fimbriatus may be a result of a different pattern of non-living keratin layers on the carapace tissue. The use of carapace to infer internal concentrations of Hg is common in freshwater and sea turtles, but in this study it was found that only blood might be a reliable indicator of Hg concentrations in liver and muscle tissues for P. sextuberculata. Thus blood may be used as a non-invasive method to study concentrations of Hg in liver and muscle of P. sextuberculata.

    AB - This study determined the concentrations of mercury (Hg) in four tissues of six species of turtles from the Rio Negro in the Amazon Basin. For two species, blood and carapace tissues were correlated with concentrations in internal tissues to establish whether blood or carapace could serve as a non-lethal indicator of internal metal exposure or body burden. The four tissues' Hg levels were also correlated to turtle size and gender. The liver in five species of turtles had the highest concentration, followed by carapace, muscle, and blood. The exception was Chelus fimbriatus, which had a higher metal concentration in the muscle than carapace. Regarding the correlation between total Hg concentrations in tissues of the two species, no significant correlation was noted for Podocnemis erythrocephala. However, for Podocnemis sextuberculata significant correlation was found between muscle ÿ liver, muscle ÿ blood, and liver ÿ blood. For P. erythrocephala, there was a correlation between Hg concentration in carapace and turtle size. For P. sextuberculata, there was no marked correlation between Hg concentration and size, but concentration in muscle was significantly influenced by gender. The patterns of Hg accumulation in tissues of the five species followed those described for freshwater species and some species of sea turtles. The difference in C. fimbriatus may be a result of a different pattern of non-living keratin layers on the carapace tissue. The use of carapace to infer internal concentrations of Hg is common in freshwater and sea turtles, but in this study it was found that only blood might be a reliable indicator of Hg concentrations in liver and muscle tissues for P. sextuberculata. Thus blood may be used as a non-invasive method to study concentrations of Hg in liver and muscle of P. sextuberculata.

    KW - Hg

    KW - turtle

    KW - Amazon

    KW - non-lethal monitoring

    KW - non-invasive monitoring Podocnemididae

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    JO - Toxicological and Environmental Chemistry Reviews

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