Social-pair judgment bias testing in slow-growing broiler chickens raised in low- or high-complexity environments

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dc.contributor.authorLourenco-Silva, M. I.en
dc.contributor.authorUlans, A.en
dc.contributor.authorCampbell, A. M.en
dc.contributor.authorPaz, ICL Almeida C. L. A.en
dc.contributor.authorJacobs, Leonieen
dc.date.accessioned2024-01-08T20:39:20Zen
dc.date.available2024-01-08T20:39:20Zen
dc.date.issued2023-06-09en
dc.description.abstractImpacts of environmental complexity on affective states in slow-growing broiler chickens (Gallus gallus domesticus) are unknown. Chickens’ performance in judgment bias tests (JBT) can be limited as they are tested individually, causing fear and anxiety. The objectives were to apply a social-pair JBT to assess the effect of environmental complexity on slow-growing broiler chickens` affective states, and assess the impact of fearfulness, anxiety, and chronic stress on JBT performance. Six-hundred Hubbard Redbro broilers were housed in six low-complexity (similar to commercial) or six high-complexity (permanent and temporary enrichments) pens. Twelve chicken pairs were trained (1 pair/pen, n = 24 chickens) using a multimodal approach (visual and spatial cues), with reward and neutral cues of opposing color and location. Three ambiguous cues were tested: near-positive, middle, and near-neutral cues. Approach and pecking behavior were recorded. Eighty-three percent of chickens (20/24) were successfully trained in 13 days. Fearfulness, anxiety, and chronic stress did not impact chickens’ performance. Chickens successfully discriminated between cues. Low-complexity chickens approached the middle cue faster than high-complexity chickens, indicating that they were in a more positive affective state. The environmental complexity provided in this study did not improve affective states in slow-growing broiler chickens compared to a control. A social-pair JBT resulted in excellent learning and testing outcomes in slow-growing broilers.en
dc.description.versionPublished versionen
dc.format.extent11 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifier9393 (Article number)en
dc.identifier.doihttps://doi.org/10.1038/s41598-023-36275-1en
dc.identifier.eissn2045-2322en
dc.identifier.issn2045-2322en
dc.identifier.issue1en
dc.identifier.orcidJacobs, Leonie [0000-0002-3799-5078]en
dc.identifier.other10.1038/s41598-023-36275-1 (PII)en
dc.identifier.pmid37296295en
dc.identifier.urihttps://hdl.handle.net/10919/117315en
dc.identifier.volume13en
dc.language.isoenen
dc.publisherNature Portfolioen
dc.relation.urihttps://www.ncbi.nlm.nih.gov/pubmed/37296295en
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectCognitive Biasen
dc.subjectSpatial Memoryen
dc.subjectIndividual-Differencesen
dc.subjectTrait Anxietyen
dc.subjectLaying Hensen
dc.subjectWater Mazeen
dc.subjectBehavioren
dc.subjectStressen
dc.subjectDepressionen
dc.subjectEnrichmenten
dc.subject.meshAnimalsen
dc.subject.meshChickensen
dc.subject.meshEmotionsen
dc.subject.meshFearen
dc.subject.meshCuesen
dc.subject.meshJudgmenten
dc.titleSocial-pair judgment bias testing in slow-growing broiler chickens raised in low- or high-complexity environmentsen
dc.title.serialScientific Reportsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
dcterms.dateAccepted2023-05-31en
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciencesen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/School of Animal 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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