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dc.contributor.authorPattrick, Jonathan Gen
dc.contributor.authorSymington, Hamishen
dc.contributor.authorFederle, Walteren
dc.contributor.authorGlover, Beverleyen
dc.date.accessioned2020-01-03T00:30:32Z
dc.date.available2020-01-03T00:30:32Z
dc.date.issued2020-01-22en
dc.identifier.issn1742-5689
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/300293
dc.description.abstractNectar is a common reward provided by plants for pollinators. More concentrated nectar is more rewarding, but also more viscous, and hence more time-consuming to drink. Consequently, theory predicts an optimum concentration for maximising energy uptake rate, dependent on the mechanics of feeding. For social pollinators such as bumblebees, another important but little-studied aspect of foraging is nectar offloading upon return to the nest. Studying the bumblebee Bombus terrestris, we found that the relationship between viscosity (μ) and volumetric transfer rates (Q) of sucrose solutions differed between drinking and offloading. For drinking, Q ∝ μ^-0.180, in good agreement with previous work. Although offloading was quicker than drinking, offloading rate decreased faster with viscosity, with Q ∝ μ^-0.502; consistent with constraints imposed by fluid flow through a tube. The difference in mechanics between drinking and offloading nectar leads to a conflict in the optimum concentration for maximising energy transfer rates. Building a model of foraging energetics, we show that including offloading lowers the maximum rate of energy return to the nest and reduces the concentration which maximises this rate by around 3 %. Using our model we show that published values of preferred nectar sugar concentrations suggest that bumblebees maximise the overall energy return rather than the instantaneous energy uptake during drinking.
dc.description.sponsorshipThis work was supported by a Biotechnology and Biological Sciences Research Council PhD Studentship under grant BB/J014540/1 to J.G.P.
dc.format.mediumPrint-Electronicen
dc.languageengen
dc.publisherRoyal Society Publishing
dc.rightsAll rights reserved
dc.rights.uri
dc.titleThe mechanics of nectar offloading in the bumblebee Bombus terrestris and implications for optimal concentrations during nectar foraging.en
dc.typeArticle
prism.issueIdentifier162en
prism.publicationDate2020en
prism.publicationNameJournal of the Royal Society, Interfaceen
prism.startingPage20190632
prism.volume17en
dc.identifier.doi10.17863/CAM.47367
dcterms.dateAccepted2019-12-16en
rioxxterms.versionofrecord10.1098/rsif.2019.0632en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-01-22en
dc.contributor.orcidPattrick, Jonathan G [0000-0001-6587-5500]
dc.contributor.orcidSymington, Hamish [0000-0002-5360-7979]
dc.contributor.orcidFederle, Walter [0000-0002-6375-3005]
dc.contributor.orcidGlover, Beverley [0000-0002-6393-819X]
dc.identifier.eissn1742-5662
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idBBSRC (BB/J014540/1)
cam.orpheus.successTue Mar 31 10:38:26 BST 2020 - Embargo updated*
cam.orpheus.counter2*
rioxxterms.freetoread.startdate2020-01-22


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