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Environmental complexity buffers against stress-induced negative judgement bias in female chickens
Linköpings universitet, Institutionen för fysik, kemi och biologi, Biologi. Linköpings universitet, Tekniska fakulteten. (Lovlie)
Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Uppsala, Sweden; Neiker-Tecnalia, Department of Animal Production, Vitoria-Gasteiz, Spain.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Biologi. Linköpings universitet, Tekniska fakulteten.
Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Uppsala, Sweden.
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2018 (Engelska)Ingår i: Scientific Reports, E-ISSN 2045-2322, Vol. 8, nr 5404Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Cognitive processes are often biased by emotions. In humans, affective disorders are accompanied by pessimistic judgement, while optimistic judgement is linked to emotional stability. Similar to humans, animals tend to interpret ambiguous stimuli negatively after experiencing stressful events, although the long-lasting impact on judgement bias has rarely been investigated. We measure judgement bias in female chicks (Gallus gallus domesticus) after exposure to cold stress, and before and after exposure to additional unpredictable stressors. Additionally, we explore if brain monoamines can explain differences in judgement bias. Chicks exposed to cold stress did not differ in judgement bias compared to controls, but showed sensitivity to additional stressors by having higher motivation for social reinstatement. Environmental complexity reduced stress-induced negative judgement bias, by maintaining an optimistic bias in individuals housed in complex conditions even after stress exposure. Moreover, judgement bias was related to dopamine turnover rate in mesencephalon, with higher activity in individuals that had a more optimistic response. These results demonstrate that environmental complexity can buffer against negative effects of additive stress and that dopamine relates to judgement bias in chicks. These results reveal that both internal and external factors can mediate emotionally biased judgement in animals, thus showing similarities to findings in humans.

Ort, förlag, år, upplaga, sidor
Nature Publishing Group, 2018. Vol. 8, nr 5404
Nationell ämneskategori
Biologiska vetenskaper
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URN: urn:nbn:se:liu:diva-147303DOI: 10.1038/s41598-018-23545-6ISI: 000428618900047PubMedID: 29599444Scopus ID: 2-s2.0-85044596460OAI: oai:DiVA.org:liu-147303DiVA, id: diva2:1198016
Tillgänglig från: 2018-04-16 Skapad: 2018-04-16 Senast uppdaterad: 2022-09-15Bibliografiskt granskad

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Zidar, JosefinaLøvlie, Hanne

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