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Titolo:
Vocalisation in chicks (Gallus gallus dom.) during stepwise social isolation
Autore:
Marx, G; Leppelt, J; Ellendorff, F;
Indirizzi:
Fed Agr Res Ctr, Inst Anim Sci & Anim Behav Mariensee, D-31535 Neustadt, Germany Fed Agr Res Ctr Neustadt Germany D-31535 nsee, D-31535 Neustadt, Germany
Titolo Testata:
APPLIED ANIMAL BEHAVIOUR SCIENCE
fascicolo: 1, volume: 75, anno: 2001,
pagine: 61 - 74
SICI:
0168-1591(200112)75:1<61:VIC(GD>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
DOMESTIC CHICKS; LAYING HEN; OPEN-FIELD; BEHAVIOR; COMMUNICATION; RECOGNITION; MOTIVATION; RESPONSES; CALLS;
Keywords:
chicken; vocalisation; group size; call types; social contacts;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Marx, G Fed Agr Res Ctr, Inst Anim Sci & Anim Behav Mariensee, Holtystr 10, D-31535 Neustadt, Germany Fed Agr Res Ctr Holtystr 10 Neustadt Germany D-31535 adt, Germany
Citazione:
G. Marx et al., "Vocalisation in chicks (Gallus gallus dom.) during stepwise social isolation", APPL ANIM B, 75(1), 2001, pp. 61-74

Abstract

Despite attempts to relate vocalisation of animals to their welfare status, very little is known in farm animals and in precocious birds. We analysedvocal expressions of 50 chicks during step by step social isolation. 91.20% of the recorded vocalisations (n = 21583 calls) consisted of four main call types: distress calls (43.72%) were characterised by declining frequencywith high energy; short peeps (22.04%) by declining frequency, low energy and short duration; warblers (19.36%) by repetitive bow-type elements with low energy; pleasure notes (6.08%) by increasing frequency and low energy. 8.80% of calls were of other undefined nature. In all tests single isolatedanimals showed highest total vocalisation. When two different hatches werecompared, total vocalisation differed significantly (P < 0.001, F-test). Changes of vocalisation during stepwise reduction of group size (beginning with four or more chicks) resulted in significant differences (P < 0.01, F-test) between steps. Low energy vocalisation (short peeps, warblers and pleasure notes) dominated in group sizes of three and more chicks. As group size decreased, the number of distress calls increased. Warblers and pleasure notes were absent when animals were isolated in the final step of the social isolation test indicating that a social target needs to be present for such call types to occur. It is concluded that vocalisation is strongly dependent on social contacts in the chick and that different degrees of social deficits find their expression in discrete changes in the pattern and elements of vocalisation. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 18:57:02