PROBIEN   20416
INSTITUTO DE INVESTIGACION Y DESARROLLO EN INGENIERIA DE PROCESOS, BIOTECNOLOGIA Y ENERGIAS ALTERNATIVAS
Unidad Ejecutora - UE
artículos
Título:
As bioaccumulation in Argentinean toad (Rhinella arenarum) larvae by SR-TXRF
Autor/es:
MARDIROSIAN, MARIANA N; PEREZ, ROBERTO D.; VENTURINO, ANDRÉS; BONGIOVANNI, GUILLERMINA A.
Revista:
Activity Report 2011/Brazilian Synchrotron Light Laboratory
Editorial:
Brazilian Synchrotron Light Laboratory
Referencias:
Lugar: Campinas; Año: 2012 vol. 2011 p. 1 - 2
ISSN:
1518-0204
Resumen:
Throughout Argentina, As is a natural contaminant of many groundwater and some river beds where many species and about 4 million people are exposed to arsenic concentrations much higher than 0.010 mg/L. Although arsenic toxicology is well described for mammal models and humans, studies in other environments such as those affecting aquatic organisms are rare in Argentina. Despite the influence that amphibians have on the flow of energy and nutrients in ecological systems, the role that amphibians play in transporting contaminants through food webs has received very little attention. Amphibians have moist, permeable skin and unshelled eggs that are directly exposed to soil, water and sunlight and that can readily absorb toxic substances. Argentinian toad (Rhinella arenarum) is an interesting biomarker of ecological impact of freshwater contamination because, as most of the amphibians, they are in close contact with water during the early stages of life and have contact with land as adults. So, theymay serve as a critical link in the biotransfer of arsenic within both, aquatic and terrestrial communities. Here, we examined As concentration up to larval stage, as well as the effect of As exposure on the concentrations of mayor elements as Fe, Cu, Zn, Br, and As, in Argentinian toad (Rhinella arenarum) along development.