Comparative Toxicity of Two Different Dimethoate Formulations in the Common Toad (Rhinella arenarum) Tadpoles.

Autor: Martinuzzi CS; National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina. candemartinuzzi@live.com.; Faculty of Biochemistry and Biological Sciences (FBCB - UNL), Paraje el Pozo s/n, 3000, Santa Fe, Argentina. candemartinuzzi@live.com., Attademo AM; National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina.; Faculty of Biochemistry and Biological Sciences (FBCB - UNL), Paraje el Pozo s/n, 3000, Santa Fe, Argentina., Peltzer PM; National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina.; Faculty of Biochemistry and Biological Sciences (FBCB - UNL), Paraje el Pozo s/n, 3000, Santa Fe, Argentina., Mac Loughlin TM; National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina.; Centro de Investigaciones del Medio Ambiente CIM (UNLP-CONICET), La Plata, Buenos Aires, Argentina., Marino DJG; National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina.; Centro de Investigaciones del Medio Ambiente CIM (UNLP-CONICET), La Plata, Buenos Aires, Argentina., Lajmanovich RC; National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina.; Faculty of Biochemistry and Biological Sciences (FBCB - UNL), Paraje el Pozo s/n, 3000, Santa Fe, Argentina.
Jazyk: angličtina
Zdroj: Bulletin of environmental contamination and toxicology [Bull Environ Contam Toxicol] 2020 Jan; Vol. 104 (1), pp. 35-40. Date of Electronic Publication: 2019 Nov 18.
DOI: 10.1007/s00128-019-02741-8
Abstrakt: Dimethoate (D) are among the most commonly used organophosphates insecticides in the world. To evaluate the toxicity of two D formulations were selected as test organisms tadpoles of Rhinella arenarum. This toad species has an extensive neotropical distribution and is easy to handle and acclimate to laboratory conditions. The tadpoles were exposed in an acute assay for 48 h to D soluble concentrates (DSC) and emulsifiable concentrates (DEC). The 48 h-LC 50 (95% confidence limits) value of DSC was 57.46 mg L -1 (40.52-81.43) and to DEC was 12.76 mg L -1 (10.39-15.68). These differences in toxicity were statistically significant (p < 0.05). In both formulations, acetylcholinesterase), carboxylesterase, and glutathione-S-transferases enzyme activities varied significantly respect to those of control group (p < 0.05). The DEC formulation was the most toxic. These results would allow the assessment and characterization of potential ecological risks following the application of those formulations.
Databáze: MEDLINE
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