Effects of agricultural pond eutrophication on survival and health status of Scinax nasicus tadpoles.
Ecotoxicol Environ Saf
; 70(1): 185-97, 2008 May.
Article
em En
| MEDLINE
| ID: mdl-17658602
To test the hypothesis that eutrophication ponds modulate some aspects of the health responses and survival of anuran tadpoles, we conducted field experiments using Scinax nasicus as sentinel organism to evaluate the quality of two ponds filled with agricultural runoff in a dominant agricultural landscape of Mid-Western Entre Ríos Province (Argentina). The survival, growth and development rates, erythrocytes nuclei aberrations, parasite infection, and brain cholinesterase activity were monitored after seven days of exposure. Water samples from the ponds were also analyzed for physico-chemical variables and levels of pesticide residues. Residues of organochlorine pesticides and nutrients were higher in the agricultural ponds with respect to those from the control pond. We suggest that the interactions among washed-off nutrients and pesticides from agriculture and environmental factors account for deleterious effects on S. nasicus survival, growth and development rate, thereby compromising their health status. These effects can lead, in turn, to an increase in tadpole vulnerability to opportunistic parasites, erythrocytes nuclei aberrations or hemolysis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Anuros
/
Poluentes Químicos da Água
/
Agricultura
/
Eutrofização
Tipo de estudo:
Screening_studies
Aspecto:
Patient_preference
Limite:
Animals
País/Região como assunto:
America do sul
/
Argentina
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Argentina
País de publicação:
Holanda