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Effect of castration method and the provision of local anesthesia on plasma cortisol, scrotal circumference, growth, and feed intake of bull calves.
- A. Fisher, M. Crowe, M. E. Alonso de La Varga, W. Enright
- Journal of animal science
- 1 October 1996
Surgical castration induced a greater plasma cortisol response than burdizzo castration, and the administration of local anesthetic reduced the cortisol response of surgical castrates but was less effective for burdizzi castrates. Expand
Genetics of adaptation and domestication in livestock
The characteristics that favoured domestication are described, especially gregariousness, precocity of young and diet, and major behavioural modifications observed during domestication, including relationships with humans and predators, and social, feeding, reproductive and maternal behaviours as well as morphological changes. Expand
Release from restraint generates a positive judgement bias in sheep
Abstract The study of judgement biases in animals has attracted interest as a way of potentially measuring emotional states by being able to detect pessimistic-like or optimistic-like evaluations of… Expand
Growth, behaviour, adrenal and immune responses of finishing beef heifers housed on slatted floors at 1.5, 2.0, 2.5 or 3.0 m2 space allowance
It was concluded that the 1.5-m2 space allowance was detrimental to animal growth and comfort compared with the other three space allowances. Expand
The effect of repeated testing on judgement biases in sheep
- R. Doyle, Stephanie Vidal, G. Hinch, A. Fisher, A. Boissy, Caroline Lee
- Medicine, Psychology
- Behavioural Processes
- 1 March 2010
The effect of time suggests that sheep learnt that the ambiguous locations were unrewarded, which supplies evidence of a limitation identified in current judgement bias methodology, due to repeated testing, which has the potential to provide misleading results. Expand
The effects of feed restriction and lying deprivation on pituitary–adrenal axis regulation in lactating cows
7 days of moderate feed restriction did not appear to alter pituitary–adrenal axis function, whereas periodic lying deprivation reduced pituitsary responsiveness to CRH and increased plasma cortisol/ACTH ratio following CRH challenge. Expand
Effects of a topical anaesthetic formulation and systemic carprofen, given singly or in combination, on the cortisol and behavioural responses of Merino lambs to castration.
The physiological and behavioural responses suggest that ring castration has less impact on the lamb than knife castration, and the specific analgesic treatments can provide modest amelioration of the pain and discomfort associated with castration. Expand
Genetics of fear in ruminant livestock
An overview of studies on ruminant livestock that emphasises an inter-individual variability and a relative intra-individual consistency in fear responsiveness and evidence that genetic factors underlie fear responsiveness is provided. Expand
The effects of surface type on lying behaviour and stress responses of dairy cows during periodic weather-induced removal from pasture
Abstract In some dairy cow grazing systems, during wet weather, the cows are removed from the pasture to a separate area for most of the day, in order to minimise treading damage to the soil. The… Expand
The effects of 12, 30, or 48 hours of road transport on the physiological and behavioral responses of sheep.
It is indicated that healthy adult sheep, transported under good conditions, can tolerate transport durations of up to 48 h without undue compromise to their welfare. Expand