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dc.contributor.authorDickel, Franziska
dc.contributor.authorMünch, Daniel
dc.contributor.authorAmdam, Gro Vang
dc.contributor.authorMappes, Johanna
dc.contributor.authorFreitak, Dalial
dc.date.accessioned2018-02-02T09:48:28Z
dc.date.available2018-02-02T09:48:28Z
dc.date.issued2018
dc.identifier.citationDickel, F., Münch, D., Amdam, G. V., Mappes, J., & Freitak, D. (2018). Increased survival of honeybees in the laboratory after simultaneous exposure to low doses of pesticides and bacteria. <em>PLoS ONE</em>, 13 (1), e0191256. <a href="https://doi.org/10.1371/journal.pone.0191256">doi:10.1371/journal.pone.0191256</a>
dc.identifier.otherTUTKAID_76726
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/56992
dc.description.abstractRecent studies of honeybees and bumblebees have examined combinatory effects of different stressors, as insect pollinators are naturally exposed to multiple stressors. At the same time the potential influences of simultaneously occurring agricultural agents on insect pollinator health remain largely unknown. Due to different farming methods, and the drift of applied agents and manure, pollinators are most probably exposed to insecticides but also bacteria from organic fertilizers at the same time. We orally exposed honeybee workers to sub-lethal doses of the insecticide thiacloprid and two strains of the bacterium Enterococcus faecalis, which can occur in manure from farming animals. Our results show that under laboratory conditions the bees simultaneously exposed to the a bacterium and the pesticide thiacloprid thiacloprid had significant higher survival rates 11 days post exposure than the controls, which surprisingly showed the lowest survival. Bees that were exposed to diet containing thiacloprid showed decreased food intake. General antibacterial activity is increased by the insecticide and the bacteria, resulting in a higher immune response observed in treated individuals compared to control individuals. We thus propose that caloric restriction through behavioural and physiological adaptations may have mediated an improved survival and stress resistance in our tests. However, the decreased food consumption could in long-term also result in possible negative effects at colony level. Our study does not show an additive negative impact of sub-lethal insecticide and bacteria doses, when tested under laboratory conditions. In contrast, we report seemingly beneficial effects of simultaneous exposure of bees to agricultural agents, which might demonstrate a surprising biological capacity for coping with stressors, possibly through hormetic regulation.
dc.language.isoeng
dc.publisherPublic Library of Science
dc.relation.ispartofseriesPLoS ONE
dc.subject.othermehiläiset
dc.subject.otherhenkiinjääminen
dc.subject.othertorjunta-aineet
dc.subject.otherbakteerit
dc.subject.otherimmuunivaste
dc.subject.otherhoneybees
dc.subject.othersurvival
dc.subject.otherimmune response
dc.subject.otherpesticides
dc.subject.otherbacteria
dc.titleIncreased survival of honeybees in the laboratory after simultaneous exposure to low doses of pesticides and bacteria
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201802011407
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosThe Department of Biological and Environmental Scienceen
dc.contributor.oppiaineEkologia ja evoluutiobiologia
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2018-02-01T13:15:17Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.format.pagerangee0191256
dc.relation.issn1932-6203
dc.relation.volume13
dc.type.versionpublishedVersion
dc.rights.copyright© 2018 Dickel et al.This is an open access article distributed under the terms of the Creative Commons License.
dc.rights.accesslevelopenAccessfi
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1371/journal.pone.0191256


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© 2018 Dickel et al.This is an open access article distributed under the terms of the Creative Commons License.
Except where otherwise noted, this item's license is described as © 2018 Dickel et al.This is an open access article distributed under the terms of the Creative Commons License.