You are here: Home / Tags / models / All Categories

Tags: models

All Categories (281-300 of 311)

  1. Decision support system with semantic model to assess the risk of tail biting in pigs. 1. Modelling

    Contributor(s):: Bracke, M. B. M., Hulsegge, B., Keeling, L., Blokhuis, H. J.

    Tail biting is a multifactorial problem with important welfare as well as economic consequences. Different stakeholders in the pig production chain, such as farmers, consumers and policy makers are interested in reducing the level of tail biting, because tail biting may affect productivity,...

  2. Decision support system with semantic model to assess the risk of tail biting in pigs. 2. 'Validation'

    Contributor(s):: Bracke, M. B. M., Hulsegge, B., Keeling, L., Blokhuis, H. J.

    Tail biting is a multifactorial problem with important welfare as well as economic consequences. Different stakeholders in the pig production chain, such as farmers, consumers and policy makers are interested in the level of tail biting, because tail biting may affect productivity, profit and...

  3. Expert consultation on weighting factors of criteria for assessing environmental enrichment materials for pigs

    Contributor(s):: Bracke, M. B. M., Zonderland, J. J., Bleumer, E. J. B.

    EC directive 2001/93/EC states that pigs must have permanent access to a sufficient quantity of material to enable proper investigation and manipulation activities. This directive requires further interpretation. In order to facilitate the further implementation of the directive into national,...

  4. Expert judgement on enrichment materials for pigs validates preliminary RICHPIG model

    Contributor(s):: Bracke, M. B. M., Zonderland, J. J., Bleumer, E. J. B.

    EC directive 2001/93/EC states that pigs must have permanent access to a sufficient quantity of material to enable proper investigation and manipulation activities. This directive requires further interpretation. In order to facilitate the further implementation of the directive into national,...

  5. Foraging in a heterogeneous environment - an experimental study of the trade-off between intake rate and diet quality

    Contributor(s):: Edouard, N., Duncan, P., Dumont, B., Baumont, R., Fleurance, G.

    Among the factors determining the choice of feeding sites by herbivores, the rate of intake of net energy and nutrients is a major one. For grazers, patches of tall grasses are ingested faster, but are digested less fully because of their high fibre contents; conversely, short grass is highly...

  6. Formalised review of environmental enrichment for pigs in relation to political decision making

    Contributor(s):: Bracke, M. B. M., Zonderland, J. J., Lenskens, P., Schouten, W. G. P., Vermeer, H., Spoolder, H. A. M., Hendriks, H. J. M., Hopster, H.

    The EC Directive 2001/93/EC states that: "Pigs must have permanent access to a sufficient quantity of material to enable proper investigation and manipulation activities, such as straw, hay, wood, sawdust, mushroom compost, peat or a mixture of such, which does not compromise the health of the...

  7. 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...

  8. Multifactorial testing of enrichment criteria: pigs 'demand' hygiene and destructibility more than sound

    Contributor(s):: Bracke, M. B. M.

    To validate (further) a semantic model called RICHPIG, which was designed to assess enrichment materials for pigs, a study was conducted to examine the importance of three assessment criteria, namely destructibility, hygiene and sound. These material properties were studied using a specially...

  9. 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...

  10. Preschoolers' adherence to instructions as a function of presence of a dog and motor skills task

    Contributor(s):: Gee, N. R., Sherlock, T. R., Bennett, E. A., Harris, S. L.

    The purpose of this study was to examine preschoolers' (n=11) ability to follow instructions in the presence or absence of a real dog while executing a variety of motor skills tasks. These tasks were divided into one of three general classifications: (1) Modeling Tasks: the children were asked to...

  11. 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...

  12. Animal welfare and economic optimisation of farrowing systems. (Special Issue: Knowing animals.)

    Contributor(s):: Ahmadi, B. V., Stott, A. W., Baxter, E. M., Lawrence, A. B., Edwards, S. A.

    In many countries, including the UK, the majority of domestic sows are housed in farrowing crates during the farrowing and lactation periods. Such systems raise welfare problems due to the close confinement of the sow. Despite the fact that many alternative housing systems have been developed, no...

  13. 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,...

  14. Can environmental variables replace some animal-based parameters in welfare assessment of dairy cows?

    Contributor(s):: Mulleder, C., Troxler, J., Laaha, G., Waiblinger, S.

    Animal-related parameters best fulfil the requirements of a valid welfare assessment, but often they are less feasible than other parameters. Therefore, this paper examines whether animal-based parameters are connected with each other and with environmental factors in order to find out if some...

  15. Clinical pathology and cardiovascular parameters are not influenced by housing rats under increased environmental complexity

    Contributor(s):: Mikkelsen, L. F., Sorensen, D. B., Krohn, T., Lauritzen, B., Dragsted, N., Hansen, A. K., Ottesen, J. L.

    Since the release of the revised Appendix A from the Council of Europe for housing of laboratory animals there have been claims that laboratory animals should be housed under more complex conditions; known popularly as enrichment. A number of studies have expressed concerns that this may increase...

  16. Consumer decision-making for animal-friendly products: synthesis and implications. (Special Issue: Knowing animals.)

    Contributor(s):: Ingenbleek, P. T. M., Immink, V. M.

    Understanding how consumers' concerns affect the consumer decision-making process is important for developing a market for animal-friendly products. This paper presents a synthesis of research on the role of animal welfare in consumer decision-making. Drawing on basic models and concepts from...

  17. Corticosterone differences rather than social housing predict performance of T-maze alternation in male CD-1 mice

    Contributor(s):: Fitchett, A. E., Barnard, C. J., Cassaday, H. J.

    This study examined the effects of social housing manipulations on bodyweight, corticosterone levels, and performance of T-maze alternation in male CD-1 mice. Males that adopted a dominant social rank were heavier than those that adopted a subordinate social rank. Dominant males also had lower...

  18. COWEL: a decision support system to assess welfare of husbandry systems for dairy cattle

    Contributor(s):: Ursinus, W. W., Schepers, F., Mol, R. M. de, Bracke, M. B. M., Metz, J. H. M., Koerkamp, P. W. G. G.

    Animals have various behavioural and physiological needs that are important for welfare. Fulfilment of these needs depends on the quality of housing, management and animal characteristics. The objective of this study was to develop a model to assign welfare scores to husbandry systems for dairy...

  19. Effects of physical activity and group size on animal welfare in laboratory rats

    Contributor(s):: Spangenberg, E., Dahlborn, K., Essen-Gustavsson, B., Cvek, K.

    The aim of this study was to investigate whether moderate physical activity and group size influence physical fitness, the level of social interactions in the home cage and rats' performance in the Elevated Plus Maze and a handling test. Forty-eight male Sprague Dawley rats were kept in groups of...

  20. Neonate rats demonstrate high levels of retention for odour preference when a substantially reduced training trial of two minutes is used

    Contributor(s):: Ogeil, R. P., Edwards, T. M.

    Neonate rats have played an important and unique role within the memory literature. Specifically, they are relatively naive to experience, can be trained in an ethologically-valid way, using a single trial, which is not aversive and can demonstrate retention for at least 24 h, post-training. As...