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  1. Individual variation in the behaviour of pigs - noise or functional coping strategies?

    Contributor(s):: Jensen, P.

  2. Invention of a forced-air-ventilated micro-isolation cage and rack system environment within cages: temperature and ammonia concentration

    Contributor(s):: Ishii, T., Yoshida, K., Hasegawa, M., Mizuno, S., Okamoto, M., Tajima, M., Kurosawa, T.

  3. Measuring animal preferences: shape of double demand curves and the effect of procedure used for varying workloads on their cross-point

    Contributor(s):: Holm, L., Ritz, C., Ladewig, J.

    Animals' preferences can be measured using cross-points between double demand curves. Animals are required to press concurrently at two levers to obtain two resources. Previously, workload was either kept constant on one lever and alternated on the other (one alternating lever procedure), or...

  4. Non-lethal mouse repellents: evaluation of cinnamamide as a repellent against commensal and field rodents

    Contributor(s):: Gurney, J. E., Watkins, R. W., Gill, E. L., Cowan, D. P.

    The potential of cinnamamide as a repellent for house mice (Mus musculus) and wood mice (Apodemus sylvaticus) was investigated. It is concluded that cinnamamide has the potential for use against the commensal rodent Mus musculus in situations where use of lethal control methods could be hazardous...

  5. Social and husbandry factors affecting the prevalence and severity of barbering ('whisker trimming') by laboratory mice

    Contributor(s):: Garner, J. P., Dufour, B., Gregg, L. E., Weisker, S. M., Mench, J. A.

    Barbering - the plucking of fur or whiskers from cagemates or oneself - is a common form of abnormal repetitive behaviour in laboratory mice. It is often viewed as a 'normal' behaviour of particular strains, primarily because it is assumed to represent a dominance behaviour. Here, we report on a...

  6. Spontaneous stereotypy and environmental enrichment in deer mice ( Peromyscus maniculatus ): reversibility of experience

    Contributor(s):: Hadley, C., Hadley, B., Ephraim, S., Yang, M., Lewis, M. H.

    Spontaneous and persistent stereotypies exhibited by deer mice appear to be prevented by post-weaning rearing in a larger, more complex environment. We sought to determine: (1) if exposure to an enriched environment later in development would still be efficacious in reducing stereotypy, and (2)...

  7. The effect of housing rats in a stimulus rich versus stimulus poor environment on preference measured by sigmoid double demand curves

    Contributor(s):: Holm, L., Ladewig, J.

    The cross-point between double demand curves, obtained by concurrent schedules of reinforcement, provides a measure of resource preference. Studies using operant conditioning have shown that animals may work for unused rewards and work even when not reinforced, which indicates that pressing a...

  8. The feeding pattern of the Norway rat ( Rattus norvegicus ) in two differently structured habitats on a farm

    Contributor(s):: Klemann, N., Pelz, H. J.

    The adaptation of bait uptake behaviour in Norway rats (Rattus norvegicus) to the conditions of particular habitats was investigated on a farm in north-west Germany. Live-trapped rats were fitted with individual PIT tags and were automatically registered at bait stations in two differently...

  9. The importance of exposure to other male scents in determining competitive behaviour among inbred male mice

    Contributor(s):: Lacey, J. C., Beynon, R. J., Hurst, J. L.

    Inbred mouse strains are homozygous at almost all loci, with individuals of the same strain expressing the same genetically determined scents that would normally provide individuals with their own unique scent. As laboratory mice are normally housed with others of the same strain in a simple and...

  10. The influence of bedding depth on behaviour in golden hamsters ( Mesocricetus auratus )

    Contributor(s):: Hauzenberger, A. R., Gebhardt-Henrich, S. G., Steiger, A.

    Although digging was found to be important in captive rodents, most golden hamsters are provided with only little material to dig. In this study, the influence of different bedding depths and acute stressors on the behaviour and welfare of golden hamsters was analysed. Forty-five male golden...

  11. Wheat or barley? feeding preferences affect distribution of three rodent species in agricultural landscape

    Contributor(s):: Heroldova, M., Tkadlec, E., Bryja, J., Zejda, J.

    Spatial distribution of voles and mice and their abundances in agricultural landscape are largely influenced by their food preferences and the distribution of preferred crops. Here we examined the correspondence between food preferences of dominant rodent species (two mice and one vole) for two...

  12. A note on behavioural responses of farm animals to ultrasound

    Contributor(s):: Algers, B.

    Horses, cattle, swine, sheep and poultry all reacted to ultrasound from a device used to clear rats from buildings. Most animals were drawn towards the sound at first and then turned away and kept their ears pointing away from the sound. Poultry showed the least reaction. The device is considered...

  13. Behavioural resistance towards poison baits in brown rats, Rattus norvegicus

    Contributor(s):: Brunton, C. F. A., Macdonald, D. W., Buckle, A. P.

  14. Development and application of a preference test system to evaluate housing conditions for laboratory rats

    Contributor(s):: Blom, H. J. M., Tintelen, G. van, Baumans, V., Broek, J. van den, Beynen, A. C.

    The preferences of rats for various heights and light intensities in cages were studied. Preferences were expressed as relative dwelling times (RDT) per cage. In the first experiment, using 9 female and 9 male Wistar rats, the females prefered lower cages (height 80 mm, RDT 29.9

  15. Effects of housing on social preference and behaviour in male golden hamsters ( Mesocricetus auratus )

    Contributor(s):: Arnold, C. E., Estep, D. Q.

  16. Effects of predictability on the welfare of captive animals. (Special Issue: Conservation, enrichment and animal behavior.)

    Contributor(s):: Bassett, L., Buchanan-Smith, H. M.

    Variations in the predictability of a stressor have pronounced effects on the behavioural and physiological effects of stress in rats. It is reasonable to expect that variations in the predictability of husbandry routines thought to be aversive to animals might have similar effects on stress...

  17. Leaving home: a study of laboratory mouse pup independence

    Contributor(s):: Bechard, A., Mason, G.

    Juvenile wild house mice leave their mothers at 8 weeks (+). In contrast, laboratory strains of mice (lab mice) are typically 'weaned' at postnatal day (PND) 21. Lab mice might mature faster than their wild forebears; but if they do not, standard laboratory weaning likely involves maternal...

  18. Let sleeping rats lie: does the timing of husbandry procedures affect laboratory rat behaviour, physiology and welfare?

    Contributor(s):: Abou-Ismail, U. A., Burman, O. H. P., Nicol, C. J., Mendl, M.

    Research has indicated that chronic stress can reduce sleep quality and quantity. Yet there has been little investigation into whether husbandry procedures carried out during an animal's normal sleeping period affect subsequent sleep behaviour and welfare. We housed 48 rats in enriched cages...

  19. Limitations on the effectiveness of environmental improvement in reducing stereotypic behaviour in bank voles ( Clethrionomys glareolus )

    Contributor(s):: Cooper, J. J., Odberg, F., Nicol, C. J.

  20. Physiological and behavioural responses of laboratory rats housed at different tier levels and levels of visual contact with conspecifics and humans

    Contributor(s):: Cloutier, S., Newberry, R. C.

    Laboratory rats are typically housed in clear or opaque cages on multi-tiered racks. Clear-walled cages allow a view of the room and facilitate visual social contact with neighbouring rats but may induce anxiety due to lack of visual cover. We hypothesized that degree of visibility of humans and...