Ecotoxicological effects of the insecticide fipronil in Brazilian native stingless bees Melipona scutellaris (Apidae: Meliponini)

Chemosphere
Cássio Resende de MoraisAna Maria Bonetti

Abstract

Melipona scutellaris Latreille, 1811 (Hymenoptera, Apidae) is a pollinator of various native and cultivated plants. Because of the expansion of agriculture and the need to ensure pest control, the use of insecticides such as fipronil (FP) has increased. This study aimed to evaluate the effects of sublethal doses of FP insecticide on M. scutellaris at different time intervals (6, 12, and 24 h) after exposure, via individually analyzed behavioral biomarkers (locomotor activity, behavioral change) as well as the effect of FP on different brain structures of bees (mushroom bodies, antennal cells, and optic cells), using sub-individual cell biomarkers (heterochromatin dispersion, total nuclear and heterochromatic volume). Forager bees were collected when they were returning to the nest and were exposed to three different concentrations of FP (0.40, 0.040, and 0.0040 ng a.i/bee) by topical application. The results revealed a reduction in the mean velocity, lethargy, motor difficulty, paralysis, and hyperexcitation in all groups of bees treated with FP. A modification of the heterochromatic dispersion pattern and changes in the total volume of the nucleus and heterochromatin were also observed in the mushroom bodies (6, 12, and 24 h o...Continue Reading

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Citations

Apr 18, 2020·Die Naturwissenschaften·Lubiane Guimarães-CestaroÉrica Weinstein Teixeira
Nov 13, 2020·Journal of Insect Science·Annelise de Souza Rosa-FontanaOsmar Malaspina
Oct 13, 2020·Environmental Pollution·Lucas MioteloThaisa Cristina Roat
Oct 9, 2020·Ecotoxicology and Environmental Safety·Caio Eduardo da Costa DominguesOsmar Malaspina
Jul 6, 2021·The Science of the Total Environment·Cliver Fernandes Farder-GomesJosé Eduardo Serrão

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