AustralieFrV1, Main, Exploration, bibRecord, 006929

Measuring judgement bias and emotional reactivity in sheep following long-term exposure to unpredictable and aversive events

Identifieur interne : 006929 ( Main/Exploration ); précédent : 006928; suivant : 006930

Measuring judgement bias and emotional reactivity in sheep following long-term exposure to unpredictable and aversive events

Auteurs : Rebecca E. Doyle [Australie] ; Caroline Lee [Australie] ; Veronique Deiss [France] ; Andrew D. Fisher [Australie] ; Geoff N. Hinch [Australie] ; Alain Boissy [France]

Source :

Physiology & behavior [ 0031-9384 ] ; 2011.

RBID : Pascal:11-0151455

Descripteurs français

Pascal (Inist)
- Biais cognitif, Jugement, Emotion émotivité, Réactivité, Mouton, Long terme, Exposition, ACTH, Affect affectivité, Bien être économique, Hydrocortisone, Animal, Antiinflammatoire.
Wicri :
- topic : Jugement.

English descriptors

KwdEn :
- Adrenocorticotropic hormone, Affect affectivity, Animal, Antiinflammatory agent, Cognitive bias, Emotion emotionality, Exposure, Hydrocortisone, Judgment, Long term, Reactivity, Sheep, Welfare.

Abstract

Animal welfare research is now starting to measure the cognitive component of affective states in an effort to improve welfare assessments of animals. Twenty-six Romane ewe lambs were trained to a spatial location task previously demonstrated to test for judgement bias in sheep. This required a go/no-go response according to the location of a bucket in a pen, with one location being positively reinforced (with a feed reward) and the other negatively reinforced (with a fan-forced blower). While training in the judgement bias arena continued, half of the sheep (n = 13) were subjected to a chronic, intermittent treatment that consisted of stressful events common to production systems. After 3 weeks of treatment, all sheep were tested for biases in judgement by placing the bucket in ambiguous locations between the two learnt reference locations. The emotional reactivity, as characterised by behavioural and physiological responses, of all sheep to events that were unexpected, novel or sudden was then tested. A significant treatment x bucket location interaction was seen on day 3 with Stressed sheep approaching the bucket locations less than Control sheep (p = 0.007). This may reflect a bias in judgement, however it is also possibly a treatment-induced difference in learning. Cardiac data did not indicate treatment differences, however the RMSSD of Control sheep in novel and unfamiliar situations was always higher than the Stressed animals. No meaningful treatment differences in emotional reactivity behaviours were evident. This paper provides further evidence that affective states exist and can be measured in animals.

Affiliations:

Australie, France

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Animal welfare research is now starting to measure the cognitive component of affective states in an effort to improve welfare assessments of animals. Twenty-six Romane ewe lambs were trained to a spatial location task previously demonstrated to test for judgement bias in sheep. This required a go/no-go response according to the location of a bucket in a pen, with one location being positively reinforced (with a feed reward) and the other negatively reinforced (with a fan-forced blower). While training in the judgement bias arena continued, half of the sheep (n = 13) were subjected to a chronic, intermittent treatment that consisted of stressful events common to production systems. After 3 weeks of treatment, all sheep were tested for biases in judgement by placing the bucket in ambiguous locations between the two learnt reference locations. The emotional reactivity, as characterised by behavioural and physiological responses, of all sheep to events that were unexpected, novel or sudden was then tested. A significant treatment x bucket location interaction was seen on day 3 with Stressed sheep approaching the bucket locations less than Control sheep (p = 0.007). This may reflect a bias in judgement, however it is also possibly a treatment-induced difference in learning. Cardiac data did not indicate treatment differences, however the RMSSD of Control sheep in novel and unfamiliar situations was always higher than the Stressed animals. No meaningful treatment differences in emotional reactivity behaviours were evident. This paper provides further evidence that affective states exist and can be measured in animals.</div>
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Measuring judgement bias and emotional reactivity in sheep following long-term exposure to unpredictable and aversive events

Measuring judgement bias and emotional reactivity in sheep following long-term exposure to unpredictable and aversive events

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri