Separation from the dam causes negative judgement bias in dairy calves.

Negative emotional states in humans are associated with a negative (pessimistic) response bias towards ambiguous cues in judgement tasks. Every mammalian young is eventually weaned; this period of increasing nutritional and social independence from the dam is associated with a pronounced behavioural...

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Autores principales:	Rolnei R Daros, João H C Costa, Marina A G von Keyserlingk, Maria J Hötzel, Daniel M Weary
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9f64418c86f44ceba7ad9946fe33465f
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spelling	oai:doaj.org-article:9f64418c86f44ceba7ad9946fe33465f2021-11-18T08:18:27ZSeparation from the dam causes negative judgement bias in dairy calves.1932-620310.1371/journal.pone.0098429https://doaj.org/article/9f64418c86f44ceba7ad9946fe33465f2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24848635/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Negative emotional states in humans are associated with a negative (pessimistic) response bias towards ambiguous cues in judgement tasks. Every mammalian young is eventually weaned; this period of increasing nutritional and social independence from the dam is associated with a pronounced behavioural response, especially when weaning is abrupt as commonly occurs in farm animals. The aim of the current study was to test the effect of separation from the cow on the responses of dairy calves in a judgement task. Thirteen Holstein calves were reared with their dams and trained to discriminate between red and white colours displayed on a computer monitor. These colours predicted reward or punishment outcomes using a go/no-go task. A reward was provided when calves approached the white screen and calves were punished with a timeout when they approached the red screen. Calves were then tested with non-reinforced ambiguous probes (screen colours intermediate to the two training colours). "GO" responses to these probes averaged (± SE) 72±3.6% before separation but declined to 62±3.6% after separation from the dam. This bias was similar to that shown by calves experiencing pain in the hours after hot-iron dehorning. These results provide the first evidence of a pessimistic judgement bias in animals following maternal separation and are indicative of low mood.Rolnei R DarosJoão H C CostaMarina A G von KeyserlingkMaria J HötzelDaniel M WearyPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 5, p e98429 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rolnei R Daros João H C Costa Marina A G von Keyserlingk Maria J Hötzel Daniel M Weary Separation from the dam causes negative judgement bias in dairy calves.
description	Negative emotional states in humans are associated with a negative (pessimistic) response bias towards ambiguous cues in judgement tasks. Every mammalian young is eventually weaned; this period of increasing nutritional and social independence from the dam is associated with a pronounced behavioural response, especially when weaning is abrupt as commonly occurs in farm animals. The aim of the current study was to test the effect of separation from the cow on the responses of dairy calves in a judgement task. Thirteen Holstein calves were reared with their dams and trained to discriminate between red and white colours displayed on a computer monitor. These colours predicted reward or punishment outcomes using a go/no-go task. A reward was provided when calves approached the white screen and calves were punished with a timeout when they approached the red screen. Calves were then tested with non-reinforced ambiguous probes (screen colours intermediate to the two training colours). "GO" responses to these probes averaged (± SE) 72±3.6% before separation but declined to 62±3.6% after separation from the dam. This bias was similar to that shown by calves experiencing pain in the hours after hot-iron dehorning. These results provide the first evidence of a pessimistic judgement bias in animals following maternal separation and are indicative of low mood.
format	article
author	Rolnei R Daros João H C Costa Marina A G von Keyserlingk Maria J Hötzel Daniel M Weary
author_facet	Rolnei R Daros João H C Costa Marina A G von Keyserlingk Maria J Hötzel Daniel M Weary
author_sort	Rolnei R Daros
title	Separation from the dam causes negative judgement bias in dairy calves.
title_short	Separation from the dam causes negative judgement bias in dairy calves.
title_full	Separation from the dam causes negative judgement bias in dairy calves.
title_fullStr	Separation from the dam causes negative judgement bias in dairy calves.
title_full_unstemmed	Separation from the dam causes negative judgement bias in dairy calves.
title_sort	separation from the dam causes negative judgement bias in dairy calves.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/9f64418c86f44ceba7ad9946fe33465f
work_keys_str_mv	AT rolneirdaros separationfromthedamcausesnegativejudgementbiasindairycalves AT joaohccosta separationfromthedamcausesnegativejudgementbiasindairycalves AT marinaagvonkeyserlingk separationfromthedamcausesnegativejudgementbiasindairycalves AT mariajhotzel separationfromthedamcausesnegativejudgementbiasindairycalves AT danielmweary separationfromthedamcausesnegativejudgementbiasindairycalves
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Separation from the dam causes negative judgement bias in dairy calves.

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