Goats work for food in a contrafreeloading task

Abstract Contrafreeloading (CFL) is the phenomenon when animals work for a resource although an identical resource is available for free. Possible explanations for CFL are that animals seek context for species-specific behaviours or to control their environments. We investigated whether goats show C...

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Autores principales:	K. Rosenberger, M. Simmler, C. Nawroth, J. Langbein, N. Keil
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/22cc507d6cfd4f5e8896bc7982d19384
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spelling	oai:doaj.org-article:22cc507d6cfd4f5e8896bc7982d193842021-12-02T13:57:01ZGoats work for food in a contrafreeloading task10.1038/s41598-020-78931-w2045-2322https://doaj.org/article/22cc507d6cfd4f5e8896bc7982d193842020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78931-whttps://doaj.org/toc/2045-2322Abstract Contrafreeloading (CFL) is the phenomenon when animals work for a resource although an identical resource is available for free. Possible explanations for CFL are that animals seek context for species-specific behaviours or to control their environments. We investigated whether goats show CFL and whether breeding for productivity traits has altered its occurrence. In a manipulation task, we compared two selection lines: 27 Nigerian dwarf goats, not bred for productivity traits, and 30 dairy goats, bred for high milk yield. Over 10 trials, each goat could perform one of three behaviours: not participating in the trial, feeding for free from an open door, or opening a sliding door for a feed of similar value. The results were analysed using an Item Response Tree (IRTree) generalized linear mixed model (GLMM). The fitted probabilities to participate were > 0.87 over all trials in both selection lines. For dwarf goats, the probability of choosing the closed door, and thereby demonstrating CFL, increased from 0.30 in Trial 1 to 0.53 in Trial 10. For dairy goats, this probability was constant at approximately 0.43. Unlike dwarf goats, dairy goats were faster to approach the closed compared to the open door. Overall, our results suggest that both selection lines were similarly interested in CFL.K. RosenbergerM. SimmlerC. NawrothJ. LangbeinN. KeilNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-12 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q K. Rosenberger M. Simmler C. Nawroth J. Langbein N. Keil Goats work for food in a contrafreeloading task
description	Abstract Contrafreeloading (CFL) is the phenomenon when animals work for a resource although an identical resource is available for free. Possible explanations for CFL are that animals seek context for species-specific behaviours or to control their environments. We investigated whether goats show CFL and whether breeding for productivity traits has altered its occurrence. In a manipulation task, we compared two selection lines: 27 Nigerian dwarf goats, not bred for productivity traits, and 30 dairy goats, bred for high milk yield. Over 10 trials, each goat could perform one of three behaviours: not participating in the trial, feeding for free from an open door, or opening a sliding door for a feed of similar value. The results were analysed using an Item Response Tree (IRTree) generalized linear mixed model (GLMM). The fitted probabilities to participate were > 0.87 over all trials in both selection lines. For dwarf goats, the probability of choosing the closed door, and thereby demonstrating CFL, increased from 0.30 in Trial 1 to 0.53 in Trial 10. For dairy goats, this probability was constant at approximately 0.43. Unlike dwarf goats, dairy goats were faster to approach the closed compared to the open door. Overall, our results suggest that both selection lines were similarly interested in CFL.
format	article
author	K. Rosenberger M. Simmler C. Nawroth J. Langbein N. Keil
author_facet	K. Rosenberger M. Simmler C. Nawroth J. Langbein N. Keil
author_sort	K. Rosenberger
title	Goats work for food in a contrafreeloading task
title_short	Goats work for food in a contrafreeloading task
title_full	Goats work for food in a contrafreeloading task
title_fullStr	Goats work for food in a contrafreeloading task
title_full_unstemmed	Goats work for food in a contrafreeloading task
title_sort	goats work for food in a contrafreeloading task
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/22cc507d6cfd4f5e8896bc7982d19384
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_version_	1718392309509259264

Goats work for food in a contrafreeloading task

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