Assessment of acute toxicity of carbofuran in Macrobrachium olfersii (Wiegmann, 1836) at different temperature levels
artículo original
Fecha
2013-07-11Autor
Barbieri, Edison
Moreira, Priscila
Luchini, Luiz Alberto
Ruiz Hidalgo, Karla María
Muñoz Rivera, Alejandro
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Carbofuran (2,3-dihydro-2,2-dimethyl-7-benzofuranyl methylcarbamate; C12H15NO3) is one of the most toxic
carbamate pesticides. For acute toxicity of carbofuran, juveniles of Macrobrachium olfersii were exposed to different concentrations of carbofuran using the static renewal method at different temperature levels (15, 20 and
25C) at pH 7.0. The main purpose of the present study was to detect the acute toxicity of carbofuran to
M. olfersii and investigate its effects on oxygen consumption and ammonium excretion; these tests have not
been carried out in this species before. First, the acute toxicity – median lethal concentration – of carbofuran
to M. olfersii for 24, 48, 72 and 96 h was examined, which resulted in the following values: 1.64, 1.22, 0.86
and 0.42 mg L1
, respectively. Furthermore, we also found that carbofuran caused an inhibition in oxygen
consumption of 60.6, 65.3 and 66.2% with respect to the control. In addition, after separate exposures to
carbofuran, elevations in ammonium excretion were more than 500% with respect to the control.
External link to the item
10.1177/074823371348465Colecciones
- Microbiología [1171]