Hens vary their vocal repertoire and structure when anticipating different types of reward

N McGrath, R Dunlop, CM Dwyer, O Burman, CJC Phillips

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)
3 Downloads (Pure)

Abstract

The vocalizations of nonhuman animals are considered potential indicators of motivational or internal state. In many species, different call types, and structural variation within call types, encode information about physical characteristics such as age or sex, or about variable traits such as motivation. Domestic chickens, Gallus gallus, have an elaborate vocal repertoire, enabling investigation into whether reward related arousal is encoded within their call type and structure. Twelve hens were given a Pavlovian conditioning paradigm using sound cues to signal the availability of two food rewards (mealworms, normal food), one non food reward (a container of substrate suitable for dust bathing), and a sound neutral event (sound cue, no reward). A muted-neutral treatment (no sound cue, no reward) provided a baseline for vocal behaviour. Sound cues preceded a 15 s anticipation period during which vocalizations were recorded. Hens produced a ‘Food call’ (previously defined in other studies) in anticipation of all rewards, including the non food reward. ‘Food calls’ and ‘Fast clucks’ were more prevalent in anticipation of rewards, and most prevalent following the cue signalling the dust bathing substrate, suggesting that this reward induced the most arousal in hens. The peak frequency of ‘Food calls’ made in anticipation of the dust bathing substrate was significantly lower than those made in anticipation of food rewards, potentially reflecting differences in arousal. Vocalizations that reliably indicate hens' motivational state could be used as measures of welfare in on-farm assessment situations. Our study is the first to reveal variation in the frequency-related parameters of the ‘Food call’ in different contexts, and to show the prevalence of different call types in reward and non reward contexts, which may have implications for welfare assessments. © 2017 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)79 - 96
Number of pages18
JournalAnimal Behaviour
Volume130
Early online date8 Jul 2017
DOIs
Publication statusFirst published - 8 Jul 2017

Fingerprint

dust bathing
hens
vocalization
Gallus gallus
animal behavior
containers
farms
gender
animals

Bibliographical note

1031401

Keywords

  • Laying hens
  • Motivation
  • Referential
  • Rewards
  • Vocalizations

Cite this

McGrath, N ; Dunlop, R ; Dwyer, CM ; Burman, O ; Phillips, CJC. / Hens vary their vocal repertoire and structure when anticipating different types of reward. In: Animal Behaviour. 2017 ; Vol. 130. pp. 79 - 96.
@article{ef0b1368ebf04f6e999ba3acaad786e8,
title = "Hens vary their vocal repertoire and structure when anticipating different types of reward",
abstract = "The vocalizations of nonhuman animals are considered potential indicators of motivational or internal state. In many species, different call types, and structural variation within call types, encode information about physical characteristics such as age or sex, or about variable traits such as motivation. Domestic chickens, Gallus gallus, have an elaborate vocal repertoire, enabling investigation into whether reward related arousal is encoded within their call type and structure. Twelve hens were given a Pavlovian conditioning paradigm using sound cues to signal the availability of two food rewards (mealworms, normal food), one non food reward (a container of substrate suitable for dust bathing), and a sound neutral event (sound cue, no reward). A muted-neutral treatment (no sound cue, no reward) provided a baseline for vocal behaviour. Sound cues preceded a 15 s anticipation period during which vocalizations were recorded. Hens produced a ‘Food call’ (previously defined in other studies) in anticipation of all rewards, including the non food reward. ‘Food calls’ and ‘Fast clucks’ were more prevalent in anticipation of rewards, and most prevalent following the cue signalling the dust bathing substrate, suggesting that this reward induced the most arousal in hens. The peak frequency of ‘Food calls’ made in anticipation of the dust bathing substrate was significantly lower than those made in anticipation of food rewards, potentially reflecting differences in arousal. Vocalizations that reliably indicate hens' motivational state could be used as measures of welfare in on-farm assessment situations. Our study is the first to reveal variation in the frequency-related parameters of the ‘Food call’ in different contexts, and to show the prevalence of different call types in reward and non reward contexts, which may have implications for welfare assessments. {\circledC} 2017 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.",
keywords = "Laying hens, Motivation, Referential, Rewards, Vocalizations",
author = "N McGrath and R Dunlop and CM Dwyer and O Burman and CJC Phillips",
note = "1031401",
year = "2017",
month = "7",
day = "8",
doi = "10.1016/j.anbehav.2017.05.025",
language = "English",
volume = "130",
pages = "79 -- 96",
journal = "Animal Behaviour",
issn = "0003-3472",
publisher = "Elsevier",

}

Hens vary their vocal repertoire and structure when anticipating different types of reward. / McGrath, N; Dunlop, R; Dwyer, CM; Burman, O; Phillips, CJC.

In: Animal Behaviour, Vol. 130, 08.07.2017, p. 79 - 96.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Hens vary their vocal repertoire and structure when anticipating different types of reward

AU - McGrath, N

AU - Dunlop, R

AU - Dwyer, CM

AU - Burman, O

AU - Phillips, CJC

N1 - 1031401

PY - 2017/7/8

Y1 - 2017/7/8

N2 - The vocalizations of nonhuman animals are considered potential indicators of motivational or internal state. In many species, different call types, and structural variation within call types, encode information about physical characteristics such as age or sex, or about variable traits such as motivation. Domestic chickens, Gallus gallus, have an elaborate vocal repertoire, enabling investigation into whether reward related arousal is encoded within their call type and structure. Twelve hens were given a Pavlovian conditioning paradigm using sound cues to signal the availability of two food rewards (mealworms, normal food), one non food reward (a container of substrate suitable for dust bathing), and a sound neutral event (sound cue, no reward). A muted-neutral treatment (no sound cue, no reward) provided a baseline for vocal behaviour. Sound cues preceded a 15 s anticipation period during which vocalizations were recorded. Hens produced a ‘Food call’ (previously defined in other studies) in anticipation of all rewards, including the non food reward. ‘Food calls’ and ‘Fast clucks’ were more prevalent in anticipation of rewards, and most prevalent following the cue signalling the dust bathing substrate, suggesting that this reward induced the most arousal in hens. The peak frequency of ‘Food calls’ made in anticipation of the dust bathing substrate was significantly lower than those made in anticipation of food rewards, potentially reflecting differences in arousal. Vocalizations that reliably indicate hens' motivational state could be used as measures of welfare in on-farm assessment situations. Our study is the first to reveal variation in the frequency-related parameters of the ‘Food call’ in different contexts, and to show the prevalence of different call types in reward and non reward contexts, which may have implications for welfare assessments. © 2017 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.

AB - The vocalizations of nonhuman animals are considered potential indicators of motivational or internal state. In many species, different call types, and structural variation within call types, encode information about physical characteristics such as age or sex, or about variable traits such as motivation. Domestic chickens, Gallus gallus, have an elaborate vocal repertoire, enabling investigation into whether reward related arousal is encoded within their call type and structure. Twelve hens were given a Pavlovian conditioning paradigm using sound cues to signal the availability of two food rewards (mealworms, normal food), one non food reward (a container of substrate suitable for dust bathing), and a sound neutral event (sound cue, no reward). A muted-neutral treatment (no sound cue, no reward) provided a baseline for vocal behaviour. Sound cues preceded a 15 s anticipation period during which vocalizations were recorded. Hens produced a ‘Food call’ (previously defined in other studies) in anticipation of all rewards, including the non food reward. ‘Food calls’ and ‘Fast clucks’ were more prevalent in anticipation of rewards, and most prevalent following the cue signalling the dust bathing substrate, suggesting that this reward induced the most arousal in hens. The peak frequency of ‘Food calls’ made in anticipation of the dust bathing substrate was significantly lower than those made in anticipation of food rewards, potentially reflecting differences in arousal. Vocalizations that reliably indicate hens' motivational state could be used as measures of welfare in on-farm assessment situations. Our study is the first to reveal variation in the frequency-related parameters of the ‘Food call’ in different contexts, and to show the prevalence of different call types in reward and non reward contexts, which may have implications for welfare assessments. © 2017 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.

KW - Laying hens

KW - Motivation

KW - Referential

KW - Rewards

KW - Vocalizations

U2 - 10.1016/j.anbehav.2017.05.025

DO - 10.1016/j.anbehav.2017.05.025

M3 - Article

VL - 130

SP - 79

EP - 96

JO - Animal Behaviour

JF - Animal Behaviour

SN - 0003-3472

ER -