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  1. On-farm evaluation of the Salmon Welfare Index Model (SWIM 1.0): theoretical and practical considerations

    Contributor(s):: Folkedal, O., Pettersen, J. M., Bracke, M., Stien, L. H., Nilsson, J., Martins, C., Breck, O., Midtlyng, P. J., Kristiansen, T.

    The present study investigated the operational feasibility of the recently developed Salmon Welfare Index Model (SWIM 1.0) designed for Atlantic salmon ( Salmo salar L) in production cages. Ten salmon farms containing spring smolts were visited twice, first between May and June the first year in...

  2. Primate location preference in a double-tier cage: the effects of illumination and cage height

    Contributor(s):: Maclean, E. L., Prior, S. R., Platt, M. L., Brannon, E. M.

    Nonhuman primates are frequently housed in double-tier arrangements with significant differences between the environments of the upper and lower-row cages. Although several studies have investigated whether this arrangement alters monkeys' behavior, no studies have addressed the two most notable...

  3. Natural incubation patterns and the effects of exposing eggs to light at various times during incubation on post-hatch fear and stress responses in broiler (meat) chickens

    Contributor(s):: Archer, G. S., Mench, J. A.

    Although environmental conditions during incubation can affect poultry welfare, one factor often overlooked in the commercial incubation of eggs is light. Light stimulation during embryonic development is now known to affect the physiology and behavior of broiler (meat) chickens post-hatch, but...

  4. Differential preference for ultraviolet light among captive birds from three ecological habitats

    Contributor(s):: Ross, M. R., Gillespie, K. L., Hopper, L. M., Bloomsmith, M. A., Maple, T. L.

  5. Impact of daylength on behavioural output in commercial broilers

    Contributor(s):: Schwean-Lardner, K., Fancher, B. I., Classen, H. L.

  6. The psychology of control: effects of control over supplementary light on welfare of marmosets. (Special Issue: The welfare of laboratory primates.)

    Contributor(s):: Buchanan-Smith, H. M., Badihi, I.

  7. A note on simulating the 'observer effect' using constant photoperiod on nursery pigs

    Contributor(s):: Lay, D. C., Jr., Buchanan, H. S., Haussmann, M. F.

    Often, researchers using video cameras to record animal behaviour must resort to illuminating the environment to obtain data during the night hours. This study was designed to determine if the behaviour of pigs is altered by constant illumination. Pigs (24+or-0.95 days of age, 5.58+or-0.18 kg)...

  8. Developmental instability and light regime in chickens ( Gallus gallus )

    Contributor(s):: Moller, A. P., Sanotra, G. S., Vestergaard, K. S.

    Fluctuating asymmetry, a measure of developmental instability, was measured in 3 skeletal characters in chickens raised under 3 different lighting regimes: (A) a 16:8 light-dark cycle, (B) a changing light regime, and (C) permanent light. Chickens reared under permanent light developed 40% larger...

  9. The effects of environmental enrichment and intermittent lighting on the behaviour and welfare of male domestic turkeys

    Contributor(s):: Sherwin, C. M., Lewis, P. D., Perry, G. C.

    The responses to 4 treatments (2 rooms/treatment) of 8 groups of 50 non-beak trimmed, male domestic turkeys was investigated from day-of hatching to 21 weeks of age. One treatment, 'Control' birds, were reared under conditions close to commercial rearing; the other treatments were Enriched (many...

  10. Behavioural time budgets of broiler chickens reared in varying light intensities

    Contributor(s):: Alvino, G. M., Archer, G. S., Mench, J. A.

    Light management is a critical component of production for intensively housed animals. To increase productivity, broiler chickens are often raised commercially in houses that are dimly illuminated on a near-continuous basis. There have been relatively few studies examining the effects of light...

  11. Investigating the importance of vision in poultry: comparing the behaviour of blind and sighted chickens

    Contributor(s):: Collins, S., Forkman, B., Kristensen, H. H., Sandoe, P., Hocking, P. M.

    Behaviour in poultry is predominately visually mediated and vision is important to the welfare of poultry. The relationship between vision, behaviour and welfare has primarily been investigated in relation to artificial lighting. Genetically blind chickens provide an alternative experimental...

  12. Creating a healing environment for critical care

    Contributor(s):: Molter, N. C.

  13. Four types of activities that affect animals: implications for animal welfare science and animal ethics philosophy

    Contributor(s):: Fraser, D., MacRae, A. M.

    People affect animals through four broad types of activity: (1) people keep companion, farm, laboratory and captive wild animals, often while using them for some purpose; (2) people cause deliberate harm to animals through activities such as slaughter, pest control, hunting, and toxicology...

  14. Diurnal feeding patterns in domestic fowls: a review

    Contributor(s):: Savory, C. J.

  15. The effect of light on the choice of nests by domestic hens

    Contributor(s):: Appleby, M. C., McRae, H. E., Peitz, B. E.

  16. The temporal patterns of food intake and allelomimetic feeding by pigs of different ages

    Contributor(s):: Liang Chou, Hsia, Wood-Gush, D. G. M.

    The feeding behaviour of 4 castrated boars was studied over 24 hr using a photoelectric cell and continuous recorder at 4 body-weight stages, viz. 20, 40, 60 and 80 kg. Two of the pigs were on continuous light, and 2 were on 8.5 hr light and 15.5 hr of darkness. The 2 pigs in each treatment were...

  17. Behavioral responses of piglets to darkness and shadows

    Contributor(s):: Tanida, H., Miura, A., Tanaka, T., Yoshimoto, T.

    26 piglets aged 1 week were used to study the effects of dark and shadows on their behavioral responses. In the first test, piglets were held in an enclosure, then allowed access to a like-sized adjacent enclosure. The piglets significantly feared staying in dark. Provision of the light beam...

  18. Light exposure during incubation affects competitive behaviour in domestic chicks

    Contributor(s):: Rogers, L. J., Workman, L.

    Domestic chickens reared from eggs kept in darkness during the last 3 days of incubation developed a more flexible group structure than those which have received light exposure during this period. Position in the social hierarchy was scored in terms of competition for access to a food source on...

  19. Rabbit preference for cages and pens with or without mirrors

    Contributor(s):: Zotte, A. D., Princz, Z., Matics, Z., Gerencser, Z., Metzger, S., Szendro, Z.

    Five-week-old Pannon White rabbits were housed in a closed climatized rabbitry and randomly assigned to either pens (56 rabbits) having a basic area of 1 m2 with a stocking density of 16 and 12 rabbits/m2 or to 18 individual cages (0.24 m2/cage). The pens and the cages were divided into two...

  20. Visual acuity of pigs at different light intensities

    Contributor(s):: Zonderland, J. J., Cornelissen, L., Wolthuis-Fillerup, M., Spoolder, H. A. M.

    In most West European countries pigs are housed indoors under low-light conditions. While former Dutch National legislation for pigs required 12 lx for 8 h per day, EU legislation requires 40 lx, so pigs should be able to distinguish small objects and subtle visual signals. However, limited...