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  1. Low Luminosity Reduces Agonistic Behaviour of Nile Tilapia

    Contributor(s):: Tatemoto, Patricia, Serra, Monica

  2. Improving leg health in broiler chickens: a systematic review of the effect of environmental enrichment

    Contributor(s):: Pedersen, I. J., Forkman, B.

  3. Management of otitis externa with an led-illuminated gel: a randomized controlled clinical trial in dogs

    Contributor(s):: Tambella, A. M., Attili, A. R., Beribè, F., Galosi, M., Marchegiani, A., Cerquetella, M., Palumbo Piccionello, A., Vullo, C., Spaterna, A., Fruganti, A.

  4. 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, Gregory S., Mench, Joy 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...

  5. Impact of daylength on behavioural output in commercial broilers

    Contributor(s):: Schwean-Lardner, Karen, Fancher, Bryan I., Classen, Henry L.

    Monitoring broiler behaviour is a helpful tool in assessing the impact that management systems, such as lighting programs, have on bird welfare. This study examined broiler behaviour at two ages in two separate flocks (27/28 days of age (27d) in flock one and 42/43d (42d) of age in the second...

  6. Exposing avian embryos to light affects post-hatch anti-predator fear responses

    Contributor(s):: Archer, Gregory S., Mench, Joy A.

    Environmental stimuli present during incubation can impact the behavior of birds post-hatch. To determine the effect of exposing broiler chicken embryos to light on fear-related behavior post-hatch, we conducted two experiments in which we incubated eggs under various light schedules, and then...

  7. How does ultraviolet light affect layer production, fear, and stress

    Contributor(s):: Sobotik, Eric B., Nelson, Jill R., Archer, Gregory S.

    The lighting spectrum used in modern poultry production commonly lacks significant amounts of ultraviolet light; however, poultry can perceive the ultraviolet spectrum unlike humans and little research has been done to investigate the importance of this part of the spectrum on bird welfare. To...

  8. Maximum permissible load for Yonaguni ponies (Japanese landrace horses) trotting over a short, straight course

    Contributor(s):: Matsuura, A., Mano, H., Irimajiri, M., Hodate, K.

    This study aimed to determine the load-bearing capacity of trotting Yonaguni ponies using gait analysis. The Yonaguni pony is one of the Japanese landrace horses, and has normal gait characteristics when trotting. As a breed they are small in stature and hence susceptible to the effect of the...

  9. Measuring heart rate variability in horses to investigate the autonomic nervous system activity - pros and cons of different methods

    Contributor(s):: Stucke, D., Ruse, M. G., Lebelt, D.

    Power spectrum analysis of heart rate variability (HRV) may provide insight into the mental state of the animal held in restricted specific experimental conditions. Determining inter-beat-interval (IBI) variations is one way to measure changes in autonomic nervous system (ANS) activity in horses....

  10. Effectiveness of complementary and self-help treatments for depression

    Contributor(s):: Jorm, A. F., Christensen, H., Griffiths, K. M., Rodgers, B.

  11. Shedding ultraviolet light on welfare in laboratory rodents: suggestions for further research and refinement

    Contributor(s):: Sorensen, D. B.

    The welfare of laboratory rats and mice is sought to be optimised through adjustment of a variety of environmental factors, including light intensity and photoperiodicity. However, the fact that rodents are able to perceive ultraviolet (UV) light tends to be ignored. The importance of being able...

  12. The impact of light, noise, cage cleaning and in-house transport on welfare and stress of laboratory rats

    Contributor(s):: Castelhano-Carlos, M. J., Baumans, V.

    Human interaction and physical environmental factors are part of the stimuli presented to laboratory animals everyday, influencing their behaviour and physiology and contributing to their welfare. Certain environmental conditions and routine procedures in the animal facility might induce stress...

  13. 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)...

  14. Accuracy of laying hens in jumping upwards and downwards between perches in different light environments

    Contributor(s):: Moinard, C., Statham, P., Haskell, M. J., McCorquodale, C., Jones, R. B., Green, P. R.

    Eighty Lohmann Brown layer hens were reared in floor pens fitted with perches from 1 day of age. After the peak of lay (25 weeks of age), their ability to jump to and from perches in different light environments was assessed in two experiments using digital video techniques that allowed detailed...

  15. Development of feather pecking in relation to light intensity

    Contributor(s):: Kjaer, J. B., Vestergaard, K. S.

    Medium heavy laying hens (ISA Brown) were reared on litter floor in a cross-over experiment with 4 treatments of age x light intensity: 3 or 30 lux and between 0 and 15 weeks of age and 3 or 30 lux and between 16 and 46 weeks. Feather pecking and behaviour were recorded by focal animal and time...

  16. 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...

  17. Factors affecting stimulus visibility for horses

    Contributor(s):: Saslow, C. A.

    In 2 experiments 11 Morgan horses (1 to 14 years old) were examined for the relative contributions of stimulus size, contrast, and environmental illumination to visibility of stimuli on the ground. Unconstrained horses were tested when walking freely in natural light. Repeated measures analyses...

  18. 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...

  19. The effects of operant control over food and light on the behaviour of domestic hens

    Contributor(s):: Taylor, P. E., Coerse, N. C. A., Haskell, M.

    In intensive farming systems, the animals have little control over important elements in their environments. For instance, food of a pre-set type is delivered at set times, and the lighting schedule is controlled by the farmer. It has been suggested that low levels of environmental control over...

  20. 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...