IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
As bioaccumulation in Argentinean toad (Rhinella arenarum) larvae by SR-TXRF
Autor/es:
MARDIROSIAN, M.N.; VENTURINO, A.; PEREZ, R.D; BONGIOVANNI G. A.
Lugar:
Campinas
Reunión:
Workshop; XXIII Reuniao Anual de Usuários; 2013
Institución organizadora:
Brazilian Synchrotron Light Laboratory
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.