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  1. Repellency and choice: feeding responses of wild rats ( Rattus norvegicus ) to cinnamic acid derivatives

    Contributor(s):: Crocker, D. R., Scanlon, C. B., Perry, S. M.

    Plant secondary compounds and other chemical compounds known to deter feeding in birds were tested for their repellency against wild rats under two-choice and no-choice conditions. In two-choice tests, where treated food was presented with a control diet, rats avoided eating cinnamamide, ferulic...

  2. Social influences on daily rhythms of guineapigs and possible explanations by refuge behaviour

    Contributor(s):: Buttner, D.

  3. Social structure and welfare in all-male groups of guinea pigs

    Contributor(s):: Beer, R., Sachser, N.

  4. Special Issue: Early Weaning. (Special Issue: Early Weaning.)

    Contributor(s):: Dybkjaer, L.

    This special issue includes review papers as well as research papers dealing with many aspects of early weaning. The first five review papers include descriptions of theories and mechanisms behind social attachment and separation, progress of natural weaning process, responses to early weaning...

  5. Special issue: Too many, too few: the effects of group size and density in captive animals. (Special issue: Too many, too few: the effects of group size and density in captive animals.)

    Contributor(s):: Estevez, I.

    For captive animals, group sizes and/or densities are established by humans based on criteria that range from enclosure size to experimental needs or economic reasons. Because group sizes in farm, zoo and laboratory animals are the result of human decisions, it is important to highlight the...

  6. Ultrasonic vocalizations as indicators of welfare for laboratory rats ( Rattus norvegicus )

    Contributor(s):: Burman, O. H. P., Ilyat, A., Jones, G., Mendl, M.

    Adult laboratory rats produce two distinct types of ultrasonic vocalization (USV) that appear to reflect the caller's emotional state, either positive (50 kHz) or negative (22 kHz). If these calls can influence the emotional state and related behaviour of group-mates, then such calls may act as...

  7. Use of a conditioning technique to reduce stress associated with repeated intra-peritoneal injections in laboratory rats

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

    We hypothesized that using classical conditioning to pair a stressful procedure such as injection with a rewarding experience decreases the stress associated with repeated exposure to this procedure. We investigated the effectiveness of pairing repeated intra-peritoneal injections with a positive...

  8. What is it like to be a rat? Rat sensory perception and its implications for experimental design and rat welfare

    Contributor(s):: Burn, C. C.

    This review of rat sensory perception spans eight decades of work conducted across diverse research fields. It covers rat vision, audition, olfaction, gustation, and somatosensation, and describes how rat perception differs from and coincides with ours. As Nagel's seminal work (1974) implies, we...

  9. An archaeological and historical review of the relationships between felids and people

    Contributor(s):: Faure, E., Kitchener, A. C.

    A review of the archaeological and historical records reveals several lines of evidence that people have had close relationships with felids. Almost 40% of felid species have been tamed on all continents, excluding Europe and Oceania, but only one species was domesticated. However, taming...

  10. Animal-assisted therapy in psychiatric rehabilitation

    Contributor(s):: Marr, C. A., French, L., Thompson, D., Drum, L., Greening, G., Mormon, J., Henderson, I., Hughes, C. W.

    Reviews of animal-assisted therapy (AAT) research suggest the need for better controlled and designed research studies to supplement the many case studies and anecdotal reports. This study reports the results of such an investigation where sixty-nine male and female psychiatric inpatients were...

  11. Human-pet dynamics in cross-cultural perspective

    Contributor(s):: Gray, P. B., Young, S. M.

    Pets increasingly serve the function as emotional surrogates of children, with tremendous resources poured into their care. However, this function of pets may be quite different from the typical human-pet dynamics characterizing a wider array of societies. To help fill a gap in the cross-cultural...

  12. The sympathetic imagination and the human-animal bond: fostering empathy through reading imaginative literature

    Contributor(s):: Beierl, B. H.

    This article is an exploration of human attitudes toward animals as depicted in literature, with special emphasis on enhancing the human-animal bond - a psychological and emotional link generated in the text when empathy develops among humans, animals, and readers. Imaginative literature,...

  13. A cage without a view increases stress and impairs cognitive performance in rats

    Contributor(s):: Harris, A. P., D'Eath, R. B., Healy, S. D.

    Single housing is believed to be chronically stressful and to have a negative impact on welfare and cognition in rats (Rattus norvegicus). However, single housing does not consistently evoke stress-like responses nor does it consistently impair cognitive performance. In an experiment in which all...

  14. A mouse is not just a mouse

    Contributor(s):: Sluyter, F., Oortmerssen, G. A. van

    In this review, we describe the existence and consequences of subspecific and individual variation in the genetic make-up of house mice. The purpose is to illustrate forms of variation that are often neglected in discussions about animal care and experimental design. Different inbred mouse...

  15. A survey assessment of the incidence of fur-chewing in commercial chinchilla ( Chinchilla lanigera ) farms

    Contributor(s):: Ponzio, M. F., Busso, J. M., Ruiz, R. D., Cuneo, F. M. de

    Chinchilla lanigera intensive breeding programmes are affected by an abnormal repetitive behaviour called 'fur-chewing', yet the aetiology is still unknown and little scientific work has been published on this condition. Recent studies have supported the idea that fur-chewing is a stress-related...

  16. An assessment of laboratory mouse welfare in UK animal units

    Contributor(s):: Leach, M. C., Main, D. C. J.

    The welfare of conventional stock laboratory mice has been assessed in 46 UK animal units using an expert-defined welfare assessment protocol containing 119 measures of mouse welfare. These were recorded using a questionnaire and observations made during a one-day visit to each unit. The standard...

  17. An illustration that statistical design mitigates environmental variation and ensures unambiguous study conclusions

    Contributor(s):: Gore, K. H., Stanley, P. J.

    This paper highlights the essential need for appropriate statistical design and randomisation in laboratory animal studies. Using an example of a 21 day weight gain study in mice, we show that without the use of an appropriate statistical design and randomisation, incorrect conclusions may have...

  18. Behaviour of golden hamsters ( Mesocricetus auratus ) kept in four different cage sizes

    Contributor(s):: Fischer, K., Gebhardt-Henrich, S. G., Steiger, A.

    Cages for laboratory and pet hamsters are usually small. Using video recordings, the behaviour of sixty female golden hamsters (Mesocricetus auratus), housed individually in four different cage sizes, was compared in order to draw conclusions about their welfare. The cage sizes were 1,800 cm2,...

  19. Body weight change as a measure of stress: a practical test

    Contributor(s):: McLaren, G. W., Mathews, F., Fell, R., Gelling, M., Macdonald, D. W.

    We report on the efficacy of body weight change as a measure of trapping and handling stress in two species of wild small mammal: bank voles (Clethrionomys glareolus) and wood mice (Apodemus sylvaticus). We tested two hypotheses: (1) that weight change after capture and handling is related to the...

  20. Can sleep behaviour be used as an indicator of stress in group-housed rats ( Rattus norvegicus )?

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

    We assessed the value of sleep behaviour as a novel measure of stress in group-housed animals. We observed, non-invasively, sleep behaviour in 144 group-housed rats, and related it to other physiological and physical indicators of stress and welfare. Sleep frequency and duration correlated...