| Autor: |
Macagnan N; Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, ERS 135 - Km 72, no 200, Erechim, RS, Brazil., Rutkoski CF; Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, ERS 135 - Km 72, no 200, Erechim, RS, Brazil., Kolcenti C; Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, ERS 135 - Km 72, no 200, Erechim, RS, Brazil., Vanzetto GV; Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, ERS 135 - Km 72, no 200, Erechim, RS, Brazil., Macagnan LP; Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, ERS 135 - Km 72, no 200, Erechim, RS, Brazil., Sturza PF; Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, ERS 135 - Km 72, no 200, Erechim, RS, Brazil., Hartmann PA; Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, ERS 135 - Km 72, no 200, Erechim, RS, Brazil., Hartmann MT; Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, ERS 135 - Km 72, no 200, Erechim, RS, Brazil. marilia.hartmann@gmail.com. |
| Abstrakt: |
It is important to establish the toxicity pesticides against non-target species, especially those pesticides used in commercial formulations. Pyrethroid insecticides are widely used in agriculture despite their toxicity to aquatic animals. In this study, we determine the toxicity of commercial formulation of two pyrethroid insecticides, cypermethrin and deltamethrin, in two life stages of Physalaemus gracilis, a frog that breeds in agricultural ecosystems and has potential contact with pyrethroid pesticides. The acute toxicity test (96 h) was carried out with embryos of stage 17:18 and larvae of stages 24:25. Embryos were more resistant to both pesticides than larvae. In embryo mobility assays, we found that both pesticides caused spasmodic contractions, suggestive of neurological effects. In acute toxicity assays, we found that P. gracilis is more resistant to these insecticides than other studied species. |
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