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No. de sistema: 000058682

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040 _ _ a| ECO
c| ECO
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100 1 _ a| Buenfil Rojas, Asela Marisol
245 1 0 a| Mercury and metallothioneins in blood fractions and tissues of captive Morelet's crocodiles in Quintana Roo, Mexico
506 _ _ a| Acceso electrónico sólo para usuarios de ECOSUR
520 1 _ a| Even though studies of heavy metals and their relation with metallothioneins (MTs) in reptile tissues have been conducted, research on heavy metals and MTs in organs and blood fractions of crocodylians is limited. To date there are no studies on the distribution of MTs in organs and their relation with mercury (Hg), or the concentration of MTs in plasma and erythrocytes of crocodylians. In order to understand the role of MTs in crocodiles, our aim was to assess the detoxification mechanisms for exposure to metals in Morelet's crocodile (Crocodylus moreletii) by using two biomarkers (Hg and MTs) in blood fractions and tissues, and comparing them with concentrations between two populations of crocodiles, one previously wild and currently captive (Theme Park) and another raised in a Wildlife Management Unit (WMU). The caudal scutes from the Theme Park showed higher concentrations of Hg than those from the skin in the WMU samples, and significant negative relationships were observed between the total length (TL) and Hg in the scutes. The significant negative relationship between Hg and hemoglobin (Hb) may be due to disorders in the oxidation process and even denature of this protein, while the positive trend observed between MTs and Hb is consistent with the detoxifying functions and the protection against oxidative damage. This study is the first to report Hg in the erythrocytes of crocodylians and the use of MTs for testing the potential of these biomarkers as a tool to assess Hg exposure in crocodile's habitats.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Crocodylus moreletii
650 _ 4 a| Metalotioneína
650 _ 4 a| Mercurio
650 _ 4 a| Metales pesados
650 _ 4 a| Marcadores bioquímicos
650 _ 4 a| Plasma sanguíneo
651 _ 4 a| Quintana Roo (México)
700 1 _ a| Álvarez Legorreta, Teresa
c| Doctora
e| coaut.
n| 6507518328
700 1 _ a| Cedeño-Vázquez, J.R.
c| Doctor
e| coaut.
773 0 _
t| Chemosphere
g| Vol, 199 (May 2018), p. 630–636
x| 0045-6535
900 _ _ a| Solicítelo con su bibliotecario/a
902 _ _ a| GOG / MM
904 _ _ a| Febrero 2018
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Biblioelectrónica
LNG eng
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*Solicítelo con su bibliotecario/a
Mercury and metallothioneins in blood fractions and tissues of captive Morelet's crocodiles in Quintana Roo, Mexico
Buenfil Rojas, Asela Marisol (autor)
Álvarez Legorreta, Teresa (autor)
Cedeño-Vázquez, J.R. (autor)
Nota: Acceso electrónico sólo para usuarios de ECOSUR
Contenido en: Chemosphere. Vol, 199 (May 2018), p. 630–636. ISSN: 0045-6535
No. de sistema: 58682
Tipo: Artículo
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Inglés

"Even though studies of heavy metals and their relation with metallothioneins (MTs) in reptile tissues have been conducted, research on heavy metals and MTs in organs and blood fractions of crocodylians is limited. To date there are no studies on the distribution of MTs in organs and their relation with mercury (Hg), or the concentration of MTs in plasma and erythrocytes of crocodylians. In order to understand the role of MTs in crocodiles, our aim was to assess the detoxification mechanisms for exposure to metals in Morelet's crocodile (Crocodylus moreletii) by using two biomarkers (Hg and MTs) in blood fractions and tissues, and comparing them with concentrations between two populations of crocodiles, one previously wild and currently captive (Theme Park) and another raised in a Wildlife Management Unit (WMU). The caudal scutes from the Theme Park showed higher concentrations of Hg than those from the skin in the WMU samples, and significant negative relationships were observed between the total length (TL) and Hg in the scutes. The significant negative relationship between Hg and hemoglobin (Hb) may be due to disorders in the oxidation process and even denature of this protein, while the positive trend observed between MTs and Hb is consistent with the detoxifying functions and the protection against oxidative damage. This study is the first to report Hg in the erythrocytes of crocodylians and the use of MTs for testing the potential of these biomarkers as a tool to assess Hg exposure in crocodile's habitats."


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