Environmental complexity positively impacts affective states of broiler chickens

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dc.contributor.authorAnderson, Mallory G.en
dc.contributor.authorCampbell, Andrew M.en
dc.contributor.authorCrump, Andrewen
dc.contributor.authorArnott, Garethen
dc.contributor.authorJacobs, Leonieen
dc.date.accessioned2022-01-07T18:27:04Zen
dc.date.available2022-01-07T18:27:04Zen
dc.date.issued2021-08-20en
dc.date.updated2022-01-07T18:27:00Zen
dc.description.abstractAffective state can bias an animal’s judgement. Animals in positive affective states can interpret ambiguous cues more positively (“optimistically”) than animals in negative affective states. Thus, judgement bias tests can determine an animal’s affective state through their responses to ambiguous cues. We tested the effects of environmental complexity and stocking density on affective states of broiler chickens through a multimodal judgement bias test. Broilers were trained to approach reinforced locations signaled by one color and not to approach unreinforced locations signaled by a different color. Trained birds were tested for latencies to approach three ambiguous cues of intermediate color and location. Broilers discriminated between cues, with shorter latencies to approach ambiguous cues closest to the reinforced cue than cues closest to the unreinforced cue, validating the use of the test in this context. Broilers housed in high-complexity pens approached ambiguous cues faster than birds in low-complexity pens–an optimistic judgement bias, suggesting the former were in a more positive affective state. Broilers from high-density pens tended to approach all cues faster than birds from low-density pens, possibly because resource competition in their home pen increased food motivation. Overall, our study suggests that environmental complexity improves broilers’ affective states, implying animal welfare benefits of environmental enrichment.en
dc.description.versionPublished versionen
dc.format.extent9 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifierARTN 16966 (Article number)en
dc.identifier.doihttps://doi.org/10.1038/s41598-021-95280-4en
dc.identifier.eissn2045-2322en
dc.identifier.issn2045-2322en
dc.identifier.issue1en
dc.identifier.orcidJacobs, Leonie [0000-0002-3799-5078]en
dc.identifier.other10.1038/s41598-021-95280-4 (PII)en
dc.identifier.pmid34417475en
dc.identifier.urihttp://hdl.handle.net/10919/107461en
dc.identifier.volume11en
dc.language.isoenen
dc.publisherNature Portfolioen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000687326500013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectslow-growing broilersen
dc.subjectstocking densityen
dc.subjectcognitive biasen
dc.subjectjudgment biasen
dc.subjectcontact-dermatitisen
dc.subjectperching behavioren
dc.subjectwalking abilityen
dc.subjectanimal emotionen
dc.subjectred junglefowlen
dc.subjectlaying hensen
dc.subject.meshAnimalsen
dc.subject.meshChickensen
dc.subject.meshGaiten
dc.subject.meshLeast-Squares Analysisen
dc.subject.meshAffecten
dc.subject.meshJudgmenten
dc.subject.meshEnvironmenten
dc.subject.meshMaleen
dc.subject.meshBiasen
dc.titleEnvironmental complexity positively impacts affective states of broiler chickensen
dc.title.serialScientific Reportsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
dcterms.dateAccepted2021-07-16en
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciencesen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/Animal and Poultry Sciencesen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen

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