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Metals in the caudal scutes of morelet's crocodile (Crocodylus moreletii) from the Southern Gulf of Mexico

Trillanes Flores, Carlos Eduardo | Pérez Jiménez, Juan Carlos [autor/a] | Rosiles Martínez, René [autor/a] | González Jáuregui, M [autor/a].
Tipo de material: Artículo ArtículoTema(s): Crocodylus moreletii | Metales pesados | Contaminación del agua | EcotoxicologíaTema(s) en inglés: Crocodylus moreletii | Heavy metals | Water pollution | Environmental toxicologyDescriptor(es) geográficos: Campeche (México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Bulletin of Environmental Contamination and Toxicology. volumen 93, número 4 (October 2014), páginas 423-428. --ISSN: 1432-0800Número de sistema: 53594Resumen:
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Caudal scutes were collected from 92 Morelet's crocodiles (Crocodylus moreletii) between May and August 2012, in three Wildlife Management and Use Units (UMAs, from its name in Spanish) and three wild sites in Campeche, Mexico. The UMAs are intensive, with an ex situ approach to manage crocodiles in captivity. The concentrations of arsenic, mercury, lead, nickel, cadmium and chromium were analyzed in each sample. As and Pb were detected in all samples, Hg in 86 and Ni in 74. The metal concentrations estimated were higher than most of the concentrations reported for skin, tail tip and caudal scutes in other crocodilians around the world. The concentration of As, Pb and Ni was significantly greater in the freeranging groups than in the captive groups in UMAs (p\0.05). Negative linear relationship was estimated between the snout-vent length and the concentration of Pb (in five groups) and Ni (in three groups). In this region C. moreletii is exposed to metals contamination and more studies are necessary to establish if represents a risk to their populations.
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Disponible para usuarios de ECOSUR con su clave de acceso

Caudal scutes were collected from 92 Morelet's crocodiles (Crocodylus moreletii) between May and August 2012, in three Wildlife Management and Use Units (UMAs, from its name in Spanish) and three wild sites in Campeche, Mexico. The UMAs are intensive, with an ex situ approach to manage crocodiles in captivity. The concentrations of arsenic, mercury, lead, nickel, cadmium and chromium were analyzed in each sample. As and Pb were detected in all samples, Hg in 86 and Ni in 74. The metal concentrations estimated were higher than most of the concentrations reported for skin, tail tip and caudal scutes in other crocodilians around the world. The concentration of As, Pb and Ni was significantly greater in the freeranging groups than in the captive groups in UMAs (p\0.05). Negative linear relationship was estimated between the snout-vent length and the concentration of Pb (in five groups) and Ni (in three groups). In this region C. moreletii is exposed to metals contamination and more studies are necessary to establish if represents a risk to their populations. eng

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