Individual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.

<h4>Background</h4>In order to maintain cohesion of groups, social animals need to process social information efficiently. Visual individual recognition, which is distinguished from mere visual discrimination, has been studied in only few mammalian species. In addition, most previous stu...

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Autores principales:	Marjorie Coulon, Bertrand L Deputte, Yvan Heyman, Claude Baudoin
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2009
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/59bd0fe8462243c2ae88125bd2b2a9d5
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spelling	oai:doaj.org-article:59bd0fe8462243c2ae88125bd2b2a9d52021-11-25T06:17:21ZIndividual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.1932-620310.1371/journal.pone.0004441https://doaj.org/article/59bd0fe8462243c2ae88125bd2b2a9d52009-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19212439/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>In order to maintain cohesion of groups, social animals need to process social information efficiently. Visual individual recognition, which is distinguished from mere visual discrimination, has been studied in only few mammalian species. In addition, most previous studies used either a small number of subjects or a few various views as test stimuli. Dairy cattle, as a domestic species allow the testing of a good sample size and provide a large variety of test stimuli due to the morphological diversity of breeds. Hence cattle are a suitable model for studying individual visual recognition. This study demonstrates that cattle display visual individual recognition and shows the effect of both familiarity and coat diversity in discrimination.<h4>Methodology/principal findings</h4>We tested whether 8 Prim'Holstein heifers could recognize 2D-images of heads of one cow (face, profiles, (3/4) views) from those of other cows. Experiments were based on a simultaneous discrimination paradigm through instrumental conditioning using food rewards. In Experiment 1, all images represented familiar cows (belonging to the same social group) from the Prim'Holstein breed. In Experiments 2, 3 and 4, images were from unfamiliar (unknown) individuals either from the same breed or other breeds. All heifers displayed individual recognition of familiar and unfamiliar individuals from their own breed. Subjects reached criterion sooner when recognizing a familiar individual than when recognizing an unfamiliar one (Exp 1: 3.1+/-0.7 vs. Exp 2: 5.2+/-1.2 sessions; Z = 1.99, N = 8, P = 0.046). In addition almost all subjects recognized unknown individuals from different breeds, however with greater difficulty.<h4>Conclusions/significance</h4>Our results demonstrated that cattle have efficient individual recognition based on categorization capacities. Social familiarity improved their performance. The recognition of individuals with very different coat characteristics from the subjects was the most difficult task. These results call for studies exploring the mechanisms involved in face recognition allowing interspecies comparisons, including humans.Marjorie CoulonBertrand L DeputteYvan HeymanClaude BaudoinPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 4, Iss 2, p e4441 (2009)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marjorie Coulon Bertrand L Deputte Yvan Heyman Claude Baudoin Individual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.
description	<h4>Background</h4>In order to maintain cohesion of groups, social animals need to process social information efficiently. Visual individual recognition, which is distinguished from mere visual discrimination, has been studied in only few mammalian species. In addition, most previous studies used either a small number of subjects or a few various views as test stimuli. Dairy cattle, as a domestic species allow the testing of a good sample size and provide a large variety of test stimuli due to the morphological diversity of breeds. Hence cattle are a suitable model for studying individual visual recognition. This study demonstrates that cattle display visual individual recognition and shows the effect of both familiarity and coat diversity in discrimination.<h4>Methodology/principal findings</h4>We tested whether 8 Prim'Holstein heifers could recognize 2D-images of heads of one cow (face, profiles, (3/4) views) from those of other cows. Experiments were based on a simultaneous discrimination paradigm through instrumental conditioning using food rewards. In Experiment 1, all images represented familiar cows (belonging to the same social group) from the Prim'Holstein breed. In Experiments 2, 3 and 4, images were from unfamiliar (unknown) individuals either from the same breed or other breeds. All heifers displayed individual recognition of familiar and unfamiliar individuals from their own breed. Subjects reached criterion sooner when recognizing a familiar individual than when recognizing an unfamiliar one (Exp 1: 3.1+/-0.7 vs. Exp 2: 5.2+/-1.2 sessions; Z = 1.99, N = 8, P = 0.046). In addition almost all subjects recognized unknown individuals from different breeds, however with greater difficulty.<h4>Conclusions/significance</h4>Our results demonstrated that cattle have efficient individual recognition based on categorization capacities. Social familiarity improved their performance. The recognition of individuals with very different coat characteristics from the subjects was the most difficult task. These results call for studies exploring the mechanisms involved in face recognition allowing interspecies comparisons, including humans.
format	article
author	Marjorie Coulon Bertrand L Deputte Yvan Heyman Claude Baudoin
author_facet	Marjorie Coulon Bertrand L Deputte Yvan Heyman Claude Baudoin
author_sort	Marjorie Coulon
title	Individual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.
title_short	Individual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.
title_full	Individual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.
title_fullStr	Individual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.
title_full_unstemmed	Individual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.
title_sort	individual recognition in domestic cattle (bos taurus): evidence from 2d-images of heads from different breeds.
publisher	Public Library of Science (PLoS)
publishDate	2009
url	https://doaj.org/article/59bd0fe8462243c2ae88125bd2b2a9d5
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Individual recognition in domestic cattle (Bos taurus): evidence from 2D-images of heads from different breeds.

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