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Toxicidad en peces de herbicidas formulados con glifosato Toxicity in fishes of herbicides formulated with glyphosate

By Maria Alvarez, Isabel T Gimenez, Hugo Saitua, Ricardo D Enriz and Fernando A Giannini

Abstract

En nuestro país existe una gran extensión de hectáreas cultivadas con soja transgénica, la misma ha sido modificada genéticamente para soportar la acción de un herbicida denominado glifosato. Debido a la gran cantidad de formulaciones comerciales que incluyen glifosato es de importancia analizar el impacto ambiental producido por éstas. La evaluacion de la toxicidad aguda de dos herbicidas comerciales formulados con glifosato y de una solución del mismo; frente a peces de la especie Poecilia reticulata "lebistes" acusa que una de las soluciones produce mortalidad del 100 % de los especimenes a 100 &mu;l/l (equivalente a 48 mg/l de principio activo); la otra a 50 &mu;l/l (equivalente a 24 mg/l de principio activo) y la solución formulada con glifosato puro no produce mortalidad aún a concentraciones de 400 mg/l. Utilizando dosis sub letales en función de los datos obtenidos en el ensayo de toxicidad aguda se determinó que a largo plazo especimenes de Cyprinus carpio haematopterus "carpa koi", manifestaron severas alteraciones hematológicas principalmente frente a una de las formulaciones evaluadas.<br>Nowadays, transgenic soya, modified in order to withstand the impact of the herbicide glyphosate, in one of the main crops grown in Argentina. Due to the large number of commercial formulations that include this drug, is important to analyze both, the acute and chronic environmental impact that they cause. Here the acute toxicity of two commercial herbicides glyphosatebased toward the fish Poecilia reticulate "guppy" was evaluated and compared with pure glyphosate solutions. Interestingly, while commercial herbicides formulations induce a 100% of mortality at concentration ranged between 50 and 100 &mu;l/l, the pure glyphosathe does not present mortality even at doses higher than 400 mg/l. When some long term effects toward Cyprinus carpio haematopterus "koi" were determined by using the sub-lethal doses already calculated it was demonstrated that one of the commercial herbicides induces severe haematological alterations

Topics: Glifosato, Coadyuvantes, Peces, Toxicidad, Glyphosate, Excipients, Fish, Toxicity, Environmental engineering, TA170-171, Engineering (General). Civil engineering (General), TA1-2040, Technology, T, DOAJ:Environmental Engineering, DOAJ:Technology and Engineering, Toxicology. Poisons, RA1190-1270, Public aspects of medicine, RA1-1270, Medicine, R, DOAJ:Public Health, DOAJ:Health Sciences
Publisher: Asociación Toxicológica Argentina
Year: 2012
OAI identifier: oai:doaj.org/article:324aa204b14c48faabb79ade6e5da21e
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