Environmentally enriching American mink ( Neovison vison) increases lymphoid organ weight and skeletal symmetry, and reveals differences between two sub-types of stereotypic behaviour
Contributor(s):: Diez-Leon, M., Bursian, S., Galicia, D., Napolitano, A., Palme, R., Mason, G.
Enrichment studies for wild carnivores (e.g., in zoos) are often short-term, use enrichments of unknown motivational significance, and focus on glucocorticoids and stereotypic behaviour (SB), ignoring other stress-relevant variables. Our study assessed the broad behavioural and physiological...
The use of positive reinforcement in training zebra sharks ( Stegostoma fasciatum)
Contributor(s):: Marranzino, A.
Positive reinforcement training (PRT) was used on 4 adult zebra sharks, Stegostoma fasciatum, housed at the Downtown Aquarium, Denver, to determine the ability of zebra sharks to become desensitized to various stimuli associated with veterinary procedures. One male and 3 female sharks were...
Behavioural and physiological consequences of acute social defeat in growing gilts: effects of the social environment
Contributor(s):: Ruis, M. A. W., Groot, J. de, Brake, J. H. A. te, Ekkel, E. D., Burgwal, J. A. van de, Erkens, J. H. F., Engel, B., Buist, W. G., Blokhuis, H. J., Koolhaas, J. M.
Endocrine, behavioural and immunological processes, together with body growth, were evaluated in gilts that were defeated at 10 weeks of age in resident-intruder tests. Immediately after defeat, gilts were either separated from or reunited with a familiar conspecific (litter-mate; always a...
The effects of regular visual contact with human beings on fear, stress, antibody and growth responses in broiler chickens
Contributor(s):: Zulkifli, I., Gilbert, J., Liew, P. K., Ginsos, J.
This study investigated the effects of regular visual contact at various ages on tonic immobility (TI) and heterophil/lymphocyte ratio (HLR) reactions to handling and crating, antibody production, growth performance and feed conversion ratios in commercial broiler chicks. Broiler chicks were...
An investigation of the relationship between adrenal activity, social rank and immunocompetence in pregnant sows kept in different housing conditions
Contributor(s):: Zanella, A. J., Mendl, M. T., Broom, D. M.
Assessment of welfare from physiological and behavioural responses of New Zealand dairy cows exposed to cold and wet conditions
Contributor(s):: Webster, J. R., Stewart, M., Rogers, A. R., Verkerk, G. A.
There is a need to assess the welfare of dairy cows that live outdoors under cold and wet conditions. This study combined a number of techniques to measure stress and make an assessment of welfare in this situation. Two groups often non-pregnant, non-lactating Holstein Friesian cows were exposed...
Quality of life means welfare: how is it related to other concepts and assessed?
Contributor(s):: Broom, D. M.
Our view of which individuals should be the subjects of our moral actions is expanding to include more people and more species. Animal welfare is the subject of rapidly increasing concern in most countries in the world, and this concern is resulting in changes in the ways in which animal users...