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Titolo:
The aversion of broiler chickens to concurrent vibrational and thermal stressors
Autore:
Abeyesinghe, SM; Wathes, CM; Nicol, CJ; Randall, JM;
Indirizzi:
Silsoe Res Inst, Bioengn Div, Silsoe MK45 4HS, Beds, England Silsoe Res Inst Silsoe Beds England MK45 4HS lsoe MK45 4HS, Beds, England Univ Bristol, Dept Vet Clin Sci, Langford BS40 5DU, Somerset, England UnivBristol Langford Somerset England BS40 5DU 40 5DU, Somerset, England
Titolo Testata:
APPLIED ANIMAL BEHAVIOUR SCIENCE
fascicolo: 3, volume: 73, anno: 2001,
pagine: 199 - 215
SICI:
0168-1591(20010801)73:3<199:TAOBCT>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
DOMESTIC-FOWL; PREFERENCES; TRANSIT; POULTRY; AVOIDANCE; TRANSPORT; WELFARE; ANIMALS; MEMORY; MOTION;
Keywords:
concurrent stressors; aversion; chickens; transport; vibration; hyperthermia;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Abeyesinghe, SM Silsoe Res Inst, Bioengn Div, Wrest Pk, Silsoe MK45 4HS, Beds, England Silsoe Res Inst Wrest Pk Silsoe Beds England MK45 4HS land
Citazione:
S.M. Abeyesinghe et al., "The aversion of broiler chickens to concurrent vibrational and thermal stressors", APPL ANIM B, 73(3), 2001, pp. 199-215

Abstract

The requirement for assessing the effects of multiple concurrent stressorsin improving the welfare of broiler chickens during transport has not beenwidely recognised. A discrete-choice technique was used to investigate theaversion of broiler chickens to concurrent vibrational and thermal transport stressors. In experiment 1, 12 female broiler chickens, aged 42 +/- 3 days were studied individually using two choice-chambers. Each chamber had four compartments connected via a central zone and offered four treatments; thermal (T: air temperature; 40 degreesC, 21% RH), vibrational (V: frequency; 2 Hz, acceleration; 1 m s(-2)), concurrent vibrational and thermal (VT) and no applied stressors (N). Coloured compartment wall panels, allocated atrandom, assisted chickens' identification of compartments. Birds were fasted overnight and were required to make five consecutive choices on each of four consecutive days. A choice was defined as entering a compartment and feeding (5 g pellets), whereupon confinement for 60 min was initiated. Choices were totalled over all birds and analysed using a log-linear generalisedlinear model. The vibration was significantly avoided (V and VT versus N and T; P < 0.05) but the thermal stresser was not (T and VT versus N and V; P > 0.05) and there was no interaction. In experiment 2, the procedure was repeated with 12 more birds and modifications to increase method sensitivity and maximise bird learning. Choices were more disparate than before with vibration avoided to a greater extent (V and VT versus T and N; P < 0.01) but there was still no main effect of the thermal treatment or a significantinteraction. Substantial differences between individuals were observed in both experiments. The overall response to vibration supported previous findings for short-term exposure, however, non-avoidance of the thermal treatment was unexpected. Possibly, the birds were unable to associate the delayedheat stress with the compartment. Alternatively, the thermal conditions were not perceived as aversive either initially or throughout the 60 min confinement. The preference method provides a useful starting point for assessing combinations of stressors which affect broiler welfare, allowing relative ranking of treatments from an animal-centred perspective, (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 06/04/20 alle ore 08:33:49