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The effects of genotype on physiological and behavioural responses related to the welfare of pregnant pigs
Contributor(s):: Barnett, J. L., Hemsworth, P. H., Cronin, G. M., Winfield, C. G., McCallum, T. H., Newman, E. A.
Plasma free-corticosteroid concentrations, aggressive behaviour and levels of motivation to interact socially and explore a novel arena were observed in an experiment to examine whether differences previously observed between pigs in neck-tethers and groups are shown by pigs of different...
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The ethological and physiological characteristics of cribbing and weaving horses
| Contributor(s):: Clegg, H. A., Buckley, P., Friend, M. A., McGreevy, P. D.
Data were gathered on the behavioural and physiological characteristics of five cribbers, six weavers and six non-stereotypic (control) mature Thoroughbred geldings for a period of 16 weeks. The horses were hired from their owners and stabled individually throughout the trial. Cribbers and...
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The use of a second-order schedule to measure feeding motivation in the pig
| Contributor(s):: Day, J. E. L., Kyriazakis, I., Lawrence, A. B.
Feeding motivation is often measured using operant conditioning; however, most of the schedules used change the underlying level of motivation or 'arouse' an individual by repeatedly presenting small quantities of feed. A solution to these problems could lie in the use of a second-order schedule...
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'Pleasures', 'pains' and animal welfare: toward a natural history of affect
| Contributor(s):: Fraser, D., Duncan, I. J. H.
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Assessing the relative aversiveness of two stimuli: single sheep in the arena test
| Contributor(s):: Erhard, H. W.
In the test described here, sheep are exposed to a situation of conflict between the motivation to approach other sheep and the motivation to avoid a human handler. The distance that the test sheep keep from the handler is a reflection of the relative aversiveness of this handler to the sheep....
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The push-door for measuring motivation in hens: an adaptation and a critical discussion of the method
| Contributor(s):: Olsson, I. A. S., Keeling, L. J., McAdie, T. M.
A study was conducted to measure the resource motivation of hens using the push-door technique with varying levels of resistance. Twelve hens were included in the experiment and underwent training with the push-door apparatus. Validation studies using food deprivation were then performed in two...
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The push-door for measuring motivation in hens: laying hens are motivated to perch at night
| Contributor(s):: Olsson, I. A. S., Keeling, L. J.
Free-living hens perch on branches in trees and domestic hens (Gallus gallus domesticus) show signs of unrest if they cannot reach a perch, suggesting that night-time perching is a behaviour that hens are motivated to perform. This motivation was quantified in two experiments using a weighted...
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The value of environmental resources to domestic hens: a comparison of the work-rate for food and for nests as a function of time
| Contributor(s):: Cooper, J. J., Appleby, M. C.
This study was conducted to investigate feeding motivation and perching motivation in laying hens. The importance of a nest box during the prelaying period was compared with the importance of food following a period of deprivation. 12 Isa Brown hens (Gallus gallus domesticus) were trained to open...
