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  1. The impact of streetlights on an aquatic invasive species: artificial light at night alters signal crayfish behaviour

    Contributor(s):: Thomas, J. R., James, J., Newman, R. C., Riley, W. D., Griffiths, S. W., Cable, J.

    Artificial light at night (ALAN) can significantly alter the behaviour, communication and orientation of animals, and will potentially interact with other stressors to affect biodiversity. Invasive, non-native species are one of the largest threats to freshwater biodiversity; however, the impact...

  2. 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...

  3. 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....

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

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

  5. 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...

  6. 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...

  7. Effect of light intensity on broiler behaviour and diurnal rhythms

    Contributor(s):: Deep, A., Schwean-Lardner, K., Crowe, T. G., Fancher, B. I., Classen, H. L.

  8. 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...

  9. 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)...

  10. 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...

  11. 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...

  12. 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...

  13. 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...

  14. 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...

  15. 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...

  16. 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...

  17. Feeding strategy in group-housed growing pigs of four different breeds

    Contributor(s):: Fernandez, J., Fabrega, E., Soler, J., Tibau, J., Ruiz, J. L., Puigvert, X., Manteca, X.

    Feeding strategy was studied in 205 growing boars in two blocks of 116 and 89 pigs of four breeds (Large White, Landrace, Duroc and Pietrain) respectively. Pigs were housed in groups of 12-14 individuals, with a single breed in each group. Feeding patterns were recorded with a computerized feed...

  18. Feeding behaviour of cattle when offered grass silage in troughs during winter and summer

    Contributor(s):: Wilson, R. K., Flynn, A. V.

    The same grass silage was group-fed to 400-kg cattle during days with either 9 or 16 h daylight. Time spent eating, ruminating and resting by randomly selected animals was monitored by radio-telemetry. The experiment was repeated with a different silage. Length of daylight had no effect on total...

  19. Stimulation of feeding in neonatal turkeys by flashing lights

    Contributor(s):: Lewis, N. J., Hurnik, J. F.

    400 Large White male and female turkey poults weighing 55 g were exposed to flashing lights (blue, green, yellow and red) for the first 20 min of each hour for the first 6 days after hatching. Poults exposed to flashing lights consumed an average of 9% more feed than 400 non-exposed poults, but...

  20. The influence of environment on daily maintenance behaviour of free-ranging Shorthorn cows in central Australia. I. General introduction and descriptive analysis of day-long activities. II. Multivariate analysis of duration and incidence of activitie

    Contributor(s):: Low, W. A., Tweedie, R. L., Edwards, C. B. H., Hodder, R. M., Malafant, K. W. J., Cunningham, R. B.