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Tags: Circadian rhythm

All Categories (1-20 of 36)

  1. Drinking behaviour in sows kept outdoors during the winter months

    Contributor(s):: Andersen, Heidi Mai-Lis, Pedersen, Lene Juul

    In the light of the EU regulation, “pigs must have permanent access to a sufficient quantity of fresh water” and the practical problems it provides farmers during winter to keep water free of ice, the aim of this study was to investigate the influence of periods with frost on the diurnal pattern...

  2. Difference of social motivation in quail selected for divergent circadian activity

    Contributor(s):: Formanek, Laureline, Richard-Yris, Marie-Annick, Petton, Christophe, Houdelier, Cécilia, Lumineau, Sophie

    Endogenous rhythms are adaptive responses to predictable changes of the environment, like the day/night cycle. Some researches demonstrated that social cycles can influence the circadian rhythm, while no study investigated the effect of endogenous rhythmicity on the sociability in Vertebrates....

  3. Ontogeny of daily activity and circadian rhythm in the Iberian lynx ( Lynx pardinus)

    Contributor(s):: Yerga, J., Calzada, J., Manteca, X., Vargas, A., Perez, M. J., Palomares, F., Rivas, A.

    The aim of this paper is to describe the ontogeny of the circadian activity rhythms in captive-born Iberian lynx ( Lynx pardinus) from birth to subadult age and to verify if they develop a bimodal circadian pattern similar to the one they show in the wild. The amount of daily activity and the...

  4. The power of automated behavioural homecage technologies in characterizing disease progression in laboratory mice: a review

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

    Behavioural changes that occur as animals become sick have been characterized in a number of species and include the less frequent occurrence of 'luxury behaviours' such as playing, grooming and socialization. 'Sickness behaviours' or behavioural changes following exposure to infectious agents,...

  5. Circadian rhythm of salivary cortisol in Asian elephants (Elephas maximus): a factor to consider during welfare assessment

    Contributor(s):: Menargues, A., Urios, V., Liminana, R., Mauri, M.

    Elevated glucocorticoid levels during an extended time period might be a stress indicator in nonhuman animals. Therefore, knowledge of the circadian pattern of cortisol secretion is very important to correctly interpret data obtained for welfare assessment of animals in captivity through salivary...

  6. Daily rhythm of total activity pattern in domestic cats ( Felis silvestris catus) maintained in two different housing conditions

    Contributor(s):: Piccione, G., Marafioti, S., Giannetto, C., Panzera, M., Fazio, F.

    Housing conditions and human presence have been shown to have an influence on daily amount of activity in herbivores. Only few studies on the behavior of cats and interactions between cat and human were conducted, and these few works are referred to cats housed in laboratories. At the same way,...

  7. Effect of service dogs on salivary cortisol secretion in autistic children

    Contributor(s):: Viau, R., Arsenault-Lapierre, G., Fecteau, S., Champagne, N., Walker, C. D., Lupien, S.

  8. Response of cats to familiar and unfamiliar human contact using continuous direct arterial blood pressure measurement

    Contributor(s):: Slingerland, L. I., Robben, J. H., Schaafsma, I., Kooistra, H. S.

  9. Circadian drinking during ad libitum and restricted feeding in pygmy goats

    Contributor(s):: Rossi, R., Prete, E. del, Rokitzky, J., Scharrer, E.

    Eating and drinking of 8 pygmy goats, 3-8 years old, 30-42 kg liveweight, were recorded during ad libitum and restricted feeding conditions. During ad libitum conditions, water and feed intake occurred throughout the day with a circadian distribution of feed and water intake showing peaks at the...

  10. Diurnal and seasonal variations of roaring activity of farmed red deer stags

    Contributor(s):: Pepin, D., Cargnelutti, B., Gonzalez, G., Joachim, J., Reby, D.

    Various environmental and social parameters are known to affect the roaring activity of the red deer (Cervus elaphus) stags, but their influence is difficult to estimate in the field. We consequently studied the diurnal changes in roaring activity of three adult stags kept in separate paddocks...

  11. Seasonal changes in circadian grazing patterns of Kerry cows ( Bos Taurus ) in semi-feral conditions in Killarney National Park, Co. Kerry, Ireland

    Contributor(s):: Linnane, M. I., Brereton, A. J., Giller, P. S.

    Domestic cattle generally graze during the day although some night-time grazing also occurs. However, questions remain as to the effect of management on circadian grazing patterns. This study provides for the first time a quantification of seasonal, circadian and animal variation in grazing...

  12. The effect of a total solar eclipse on the grazing behaviour of dairy cattle

    Contributor(s):: Rutter, S. M., Tainton, V., Champion, R. A., Grice, P. le

    Studies of the grazing behaviour of ruminants show that there is a recurrent daily pattern of grazing behaviour. Various researchers have hypothesised that this pattern is controlled by daylight, but this theory is difficult to test with grazing animals under field conditions. The total solar...

  13. Diurnal behavioural patterns in the houbara bustard ( Chlamydotis undulata ) in captivity: effects of temperature and daylength

    Contributor(s):: Jacquet, J. M., Launay, F.

    Twenty adult male houbara were allocated to 4 groups: 12 h light, 12 h dark (12L:12D) at 20 degrees C or 30 degrees C, 8L:16D at 20 degrees C and 16L:8D at 20 degrees C. The temperature was constant and food and water were available ad libitum. The birds were observed for 96 h and behaviour was...

  14. Individual behavioural rhythmicity is linked to social motivation in Japanese quail

    Contributor(s):: Formanek, L., Richard-Yris, M. A., Arnould, C., Houdelier, C., Lumineau, S.

    This experiment explored links between individual social traits and behavioural rhythms by comparing the feeding activity rhythms of HSR (high social reinstatement) Japanese quail that will cover long distances to reach conspecifics, to those of LSR (low social reinstatement) quail that will...

  15. Individual differences in behaviour, physiology and pathology in breeding gilts housed in groups or stalls

    Contributor(s):: Geverink, N. A., Schouten, W. G. P., Gort, G., Wiegant, V. M.

    A number of studies in young pigs have demonstrated a relation between a variety of behavioural and physiological features and the degree of resistance displayed early in life in a so-called "backtest". The current study aimed at investigating the relation between the backtest response and the...

  16. Estrous synchrony in a group of African elephants (Loxodonta africana) under human care

    Contributor(s):: Weissenbock, N. M., Schwammer, H. M., Ruf, T.

  17. Diurnal feeding patterns in domestic fowls: a review

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

  18. Dust-bathing in the domestic--diurnal rhythm and dust deprivation

    Contributor(s):: Vestergaard, K.

    The diurnal rhythm of dust-bathing and the effect of dust deprivation on this behaviour were studied in a flock of 14 White Leghorn egg-layers. Increasing deprivation time lowered latency and raised duration of dust-bathing. Latency was longer when measured in the morning (09.15 h) than in the...

  19. Ingestive behaviour in sheep under field conditions

    Contributor(s):: Bueno, L., Ruckebusch, Y.

  20. Patterns and frequency of social interactions in young grazing bulls and steers

    Contributor(s):: Hinch, G. N., Lynch, J. J., Thwaites, C. J.

    Two herds of Hereford cattle, each containing bulls and steers, were observed at ages between 10 and 18 months. Bulls showed higher frequencies of all interactions except grooming and running, but the differences between bulls and steers were significant only at ages greater than 14 months. A...