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dc.contributor.author
Brodeur, Celine Marie Julie
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dc.contributor.author
Sassone, Alina Grisel
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dc.contributor.author
Hermida, Gladys Noemí
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dc.contributor.author
Codugnello, Nadia Beatriz
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dc.date.available
2017-11-13T15:50:01Z
dc.date.issued
2013-03
dc.identifier.citation
Brodeur, Celine Marie Julie; Sassone, Alina Grisel; Hermida, Gladys Noemí; Codugnello, Nadia Beatriz; Environmentally-relevant concentrations of atrazine induce non-monotonic acceleration of developmental rate and increades size metamorphosis in Rhinella arenarum tadpoles; Elsevier; Ecotoxicology and Environmental Safety; 92; 3-2013; 10-17
dc.identifier.issn
0147-6513
dc.identifier.uri
http://hdl.handle.net/11336/28012
dc.description.abstract
Despite of the various studies reporting on the subject, anticipating the impacts of the widely-used herbicide atrazine on anuran tadpoles metamorphosis remains complex as increases or decreases of larval period duration are almost as frequently reported as an absence of effect. The aim of the present study was to examine the effects of environmentally-relevant concentrations of atrazine (0.1, 1, 10, 100, and 1000 μg/L) on the timings of metamorphosis and body size at metamorphosis in the common South American toad, Rhinella arenarum (Anura: bufonidae). None of the atrazine concentrations tested significantly altered survival. Low atrazine concentrations in the range of 1–100 μg/L were found to accelerate developmental rate in a non-monotonic U-shaped concentration–response relationship. This observed acceleration of the metamorphic process occurred entirely between stages 25 and 39; treated tadpoles proceeding through metamorphosis as control animals beyond this point. Together with proceeding through metamorphosis at a faster rate, tadpoles exposed to atrazine concentrations in the range of 1–100 μg/L furthermore transformed into significantly larger metamorphs than controls, the concentration–response curve taking the form of an inverted U in this case. The no observed effect concentration (NOEC) was 0.1 μg atrazine/L for both size at metamorphosis and timings of metamorphosis. Tadpoles exposed to 100 μg/L 17β-estradiol presented the exact same alterations of developmental rate and body size as those treated with 1, 10 and 100 μg/L of atrazine. Elements of the experimental design that facilitated the detection of alterations of metamorphosis at low concentrations of atrazine are discussed, together with the ecological significance of those findings.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Amphibian
dc.subject
Atrazine
dc.subject
Agriculture
dc.subject
Pesticide
dc.subject
Hormesis
dc.subject.classification
Otras Ciencias Biológicas
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Environmentally-relevant concentrations of atrazine induce non-monotonic acceleration of developmental rate and increades size metamorphosis in Rhinella arenarum tadpoles
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-11-13T11:33:38Z
dc.journal.volume
92
dc.journal.pagination
10-17
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Hoboken
dc.description.fil
Fil: Brodeur, Celine Marie Julie. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales. Instituto de Recursos Biológicos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Sassone, Alina Grisel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Hermida, Gladys Noemí. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Codugnello, Nadia Beatriz. Universidad Nacional de Luján. Departamento de Ciencias Básicas. Laboratorio de Ecología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Ecotoxicology and Environmental Safety
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.ecoenv.2013.01.019
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0147651313000353
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