Blood lead levels, δ-ALAD inhibition, and hemoglobin content in blood of giant toad (Rhinella marina) to assess lead exposure in three areas surrounding an industrial complex in Coatzacoalcos, Veracruz, Mexico.

Environmental Monitoring and Assessment
César A Ilizaliturri-HernándezIván Pérez-Maldonado

Abstract

The Coatzacoalcos Region in Veracruz, Mexico houses one of the most important industrial complexes in Mexico and Latin America. Lead is an ubiquitous environmental pollutant which represents a great risk to human health and ecosystems. Amphibian populations have been recognized as biomonitors of changes in environmental conditions. The purpose of this research is to measure exposure to lead and evaluate hematological and biochemical effects in specimens of giant toads (Rhinella marina) taken from three areas surrounding an industrial complex in the Coatzacoalcos River downstream. Lead levels in toads' blood are between 10.8 and 70.6 μg/dL and are significantly higher in industrial sites. We have found a significant decrease in the delta-aminolevulinic acid dehydratase (δ-ALAD) activity in blood from 35.3 to 78 % for the urban-industrial and industrial sites, respectively. In addition, we have identified a strong inverse relationship between the δ-ALAD activity and the blood lead levels (r = -0.84, p < 0.001). Hemoglobin and mean corpuscular hemoglobin levels, as well as the condition factor, are found to be lower at industrial sites compared with the reference sites. Our results suggest that the R. marina can be considered a go...Continue Reading

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Citations

May 23, 2014·Environmental Science and Pollution Research International·M A Morales-MoraC Nolasco-Hipólito
Dec 22, 2014·Ecotoxicology and Environmental Safety·Andrés Maximiliano AttademoPaula Grenón
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Oct 1, 2013·Environmental Monitoring and Assessment·Andrés Maximiliano AttademoAgustín Basso
Jul 11, 2016·Environmental Monitoring and Assessment·María Selene BabiniAdolfo Ludovico Martino
Dec 12, 2020·Environmental Toxicology and Pharmacology·Omar Cruz-SantiagoCésar Arturo Ilizaliturri-Hernández
Mar 17, 2021·Bulletin of Environmental Contamination and Toxicology·Omar Cruz-SantiagoCésar A Ilizaliturri-Hernández

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