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Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees

In cases of acute intoxication, honeybees often lay in front of their hives for several days, exposed to sunlight and weather, before a beekeeper can take a sample. Beekeepers send samples to analytical laboratories, but sometimes no residues can be detected. Temperature and sun light could influenc...

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Autores principales: Schott, Matthias, Bischoff, Gabriela, Eichner, Gerrit, Vilcinskas, Andreas, Büchler, Ralph, Meixner, Marina Doris, Brandt, Annely
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5524747/
https://www.ncbi.nlm.nih.gov/pubmed/28740208
http://dx.doi.org/10.1038/s41598-017-06259-z
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author Schott, Matthias
Bischoff, Gabriela
Eichner, Gerrit
Vilcinskas, Andreas
Büchler, Ralph
Meixner, Marina Doris
Brandt, Annely
author_facet Schott, Matthias
Bischoff, Gabriela
Eichner, Gerrit
Vilcinskas, Andreas
Büchler, Ralph
Meixner, Marina Doris
Brandt, Annely
author_sort Schott, Matthias
collection PubMed
description In cases of acute intoxication, honeybees often lay in front of their hives for several days, exposed to sunlight and weather, before a beekeeper can take a sample. Beekeepers send samples to analytical laboratories, but sometimes no residues can be detected. Temperature and sun light could influence the decrease of pesticides in bee samples and thereby residues left for analysis. Moreover, samples are usually sent via normal postal services without cooling. We investigated the temporal dynamics of whole-body residues of imidacloprid in live or dead honeybees following a single-meal dietary exposure of 41 ng/bee under various environmental conditions, such as freezing, exposure to UV light or transfer of individuals through the mail system. Immobile, “dead” looking honeybees recovered from paralysis after 48 hours. The decrease of residues in living but paralysed bees was stopped by freezing (= killing). UV light significantly reduced residues, but the mode of transport did not affect residue levels. Group feeding increased the variance of residues, which is relevant for acute oral toxicity tests. In conclusion, elapsed time after poisoning is key for detection of neonicotinoids. Freezing before mailing significantly reduced the decrease of imidacloprid residues and may increase the accuracy of laboratory analysis for pesticides.
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spelling pubmed-55247472017-07-26 Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees Schott, Matthias Bischoff, Gabriela Eichner, Gerrit Vilcinskas, Andreas Büchler, Ralph Meixner, Marina Doris Brandt, Annely Sci Rep Article In cases of acute intoxication, honeybees often lay in front of their hives for several days, exposed to sunlight and weather, before a beekeeper can take a sample. Beekeepers send samples to analytical laboratories, but sometimes no residues can be detected. Temperature and sun light could influence the decrease of pesticides in bee samples and thereby residues left for analysis. Moreover, samples are usually sent via normal postal services without cooling. We investigated the temporal dynamics of whole-body residues of imidacloprid in live or dead honeybees following a single-meal dietary exposure of 41 ng/bee under various environmental conditions, such as freezing, exposure to UV light or transfer of individuals through the mail system. Immobile, “dead” looking honeybees recovered from paralysis after 48 hours. The decrease of residues in living but paralysed bees was stopped by freezing (= killing). UV light significantly reduced residues, but the mode of transport did not affect residue levels. Group feeding increased the variance of residues, which is relevant for acute oral toxicity tests. In conclusion, elapsed time after poisoning is key for detection of neonicotinoids. Freezing before mailing significantly reduced the decrease of imidacloprid residues and may increase the accuracy of laboratory analysis for pesticides. Nature Publishing Group UK 2017-07-24 /pmc/articles/PMC5524747/ /pubmed/28740208 http://dx.doi.org/10.1038/s41598-017-06259-z Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Schott, Matthias
Bischoff, Gabriela
Eichner, Gerrit
Vilcinskas, Andreas
Büchler, Ralph
Meixner, Marina Doris
Brandt, Annely
Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_full Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_fullStr Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_full_unstemmed Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_short Temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
title_sort temporal dynamics of whole body residues of the neonicotinoid insecticide imidacloprid in live or dead honeybees
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5524747/
https://www.ncbi.nlm.nih.gov/pubmed/28740208
http://dx.doi.org/10.1038/s41598-017-06259-z
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