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Tags: Behavior and behavior mechanisms

All Categories (2601-2620 of 2631)

  1. Relinquishing dog owners' ability to predict behavioural problems in shelter dogs post adoption

    Contributor(s):: Stephen, J., Ledger, R.

    The aim of this paper is to investigate whether relinquishing owners' reports of their dogs' behaviour corresponds with how these dogs behave in their new homes 2 and 6 weeks post-adoption. In this longitudinal study, information on dog behaviour was collected using a 20-item questionnaire. The...

  2. A counterbalanced version of Ainsworth's Strange Situation Procedure reveals secure-base effects in dog-human relationships

    | Contributor(s):: Palmer, R., Custance, D.

    It has been proposed that the dog-human relationship constitutes an infantile-like attachment. However, previous empirical support based on Ainsworth's Strange Situation test has proved inconclusive due to order effects inherent in the original procedure. In particular, these order effects...

  3. Behavioural responses of heifers to ACTH injections

    | Contributor(s):: Negrao, J. A., Porcionato, M. A. de F., Passille, A. M. de, Rushen, J.

    The objective of this study was to investigate behavioural changes in Holstein heifers caused by exogenous adrenocorticotropic hormone (ACTH) administration. Twelve 11-month-old heifers were submitted to either a single saline or ACTH injection and then the treatments were switched after 3 days...

  4. Genetic variation in aggression-related traits in Golden Retriever dogs

    | Contributor(s):: Liinamo, A. E., Berg, L. van den, Leegwater, P. A. J., Schilder, M. B. H., Arendonk, J. A. M. van, Oost, B. A. van

    In this study, heritabilities of several measures of aggression were estimated in a group of 325 Golden Retrievers, using the Restricted Maximum Likelihood method. The studied measures were obtained either through owner opinions or by using the Canine Behavioural Assessment and Research...

  5. A review of the behavioral and neurochemical consequences of early weaning in rodents. (Special Issue: Early Weaning.)

    | Contributor(s):: Kikusui, T., Nakamura, K., Mori, Y.

    In mammals, mother-infant bonding is based on the dependence of the infant on the mother for sustenance, i.e., the infant suckles milk, but also involving a need for physical contact. Weaning is one of the most important events that occur in developing animals and the timing of natural weaning is...

  6. Behavioural differences between two captive populations of red jungle fowl ( Gallus gallus ) with different genetic background, raised under identical conditions

    | Contributor(s):: Hakansson, J., Bratt, C., Jensen, P.

    Ex situ conservation of threatened species may lead to behavioural adaptation, which can affect success of reintroduction attempts. In previous studies, we investigated the effects of captivity on the behaviour of red jungle fowl (Gallus gallus) and found that captive populations differed...

  7. Comparison of time-based frequencies, fractal analysis and T-patterns for assessing behavioural changes in broiler breeders fed on two diets at two levels of feed restriction: a case study

    | Contributor(s):: Hocking, P. M., Rutherford, K. M. D., Picard, M.

    Three methods of describing behavioural activity - conventional statistics (number of bouts, mean bout length and total duration), detrended fluctuation analysis (DFA) and T-patterns (THEME) - were compared. Behavioural observations were obtained by focal sampling of feed restricted broiler...

  8. Effects of embryonic corticosterone exposure and post-hatch handling on tonic immobility and willingness to compete in chicks

    | Contributor(s):: Janczak, A. M., Heikkila, M., Valros, A., Torjesen, P., Andersen, I. L., Bakken, M.

    Previous experiments indicate that artificial elevation of egg corticosterone content prior to incubation may increase fear of humans, reduce the willingness to compete with conspecifics and reduce the growth rate of chicks hatching from these eggs. It can also be hypothesized that...

  9. Effects of weaning age on the behavioural and neuroendocrine development of piglets. (Special Issue: Early Weaning.)

    | Contributor(s):: Jarvis, S., Moinard, C., Robson, S. K., Sumner, B. E. H., Douglas, A. J., Seckl, J. R., Russell, J. A., Lawrence, A. B.

    Adverse early life experiences can permanently "programme" increases in stress reactivity in adulthood. We investigated whether weaning, which involves maternal separation, at different ages, altered subsequent behaviour, physiology and neuroendocrine function in young pigs. The litters...

  10. Feeding behaviour in turkeys with a change-over from crumbs to pellets

    | Contributor(s):: Lecuelle, S., Bouvarel, I., Chagneau, A. M., Lescoat, P., Laviron, F., Leterrier, C.

    Poultry receive different diets during their rearing but these changes can result in a major reduction in feed intake and subsequently in growth. This problem is widespread in turkeys, especially with feed changes from crumbs to pellets. This experiment aimed to analyse behaviour during this...

  11. Maternal deprivation and the development of stereotypic behaviour. (Special Issue: Early Weaning.)

    | Contributor(s):: Latham, N. R., Mason, G. J.

    Many farm, laboratory, zoo and companion animals experience some form of maternal deprivation. This is typically via separation from their mothers earlier than would happen in free-living populations, in some cases even while young are still dependent upon milk. Maternal deprivation may also...

  12. Temperament, stereotypies and anticipatory behaviour as measures of welfare in mink

    | Contributor(s):: Hansen, S. W., Jeppesen, L. L.

    A farm mink population of 290 1-year-old wild-coloured females was scanned for stereotyped behaviour in October 2003. At the same time the temperament of the individuals was established with a stick test. Some of the females performed no stereotypies in 54 scans and this fraction of the...

  13. The feeding pattern of the Norway rat ( Rattus norvegicus ) in two differently structured habitats on a farm

    | Contributor(s):: Klemann, N., Pelz, H. J.

    The adaptation of bait uptake behaviour in Norway rats (Rattus norvegicus) to the conditions of particular habitats was investigated on a farm in north-west Germany. Live-trapped rats were fitted with individual PIT tags and were automatically registered at bait stations in two differently...

  14. Weaning distress in dairy calves: acute behavioural responses by limit-fed calves. (Special Issue: Early Weaning.)

    | Contributor(s):: Jasper, J., Budzynska, M., Weary, D. M.

    Weaning typically involves both dietary and social changes as the transition from milk to solid feed is normally accompanied by reduced contact with the dam. Dairy calves provide a model to study the effect of weaning from milk independent of separation, as calves are typically separated from the...

  15. Addressing nonhuman primate behavioral problems through the application of operant conditioning: is the human treatment approach a useful model? (Special Issue: Conservation, enrichment and animal behavior.)

    | Contributor(s):: Bloomsmith, M. A., Marr, M. J., Maple, T. L.

    Training by the systematic application of operant conditioning has been widely applied in the care, management, exhibition, and study of nonhuman primates and many other species, but is less often used to control problematic animal behavior such as stereotyped behavior or self-injurious behavior....

  16. Habituation and extinction in an approach-avoidance test: an example with sheep

    | Contributor(s):: Erhard, H. W., Elston, D. A., Davidson, G. C.

    During a behavioural test, the test animal's perception of the test situation may change, e.g. as a result of habituation. This change can occur within a test or between repetitions of a test. It is particularly important in the arena test because in an approach-avoidance situation, the negative...

  17. Special Issue: Early Weaning. (Special Issue: Early Weaning.)

    | Contributor(s):: Dybkjaer, L.

    This special issue includes review papers as well as research papers dealing with many aspects of early weaning. The first five review papers include descriptions of theories and mechanisms behind social attachment and separation, progress of natural weaning process, responses to early weaning...

  18. Specificity of early handling: are rabbit pups able to distinguish between people?

    | Contributor(s):: Csatadi, K., Agnes, B., Vilmos, A.

    Rabbits' early life contains a short period when pups are extremely sensitive to novel stimuli and become accustomed to it. If they are handled by the hand during this period their avoidance toward humans decreases. The present study investigated whether pups could distinguish between humans by...

  19. The ethological and physiological characteristics of cribbing and weaving horses

    | Contributor(s):: Clegg, H. A., Buckley, P., Friend, M. A., McGreevy, P. D.

    Data were gathered on the behavioural and physiological characteristics of five cribbers, six weavers and six non-stereotypic (control) mature Thoroughbred geldings for a period of 16 weeks. The horses were hired from their owners and stabled individually throughout the trial. Cribbers and...

  20. An exploratory model of dog disciplining

    | Contributor(s):: Ben-Michael, J., Korzilius, H., Felling, A., Vossen, J.

    This study examines the possible relationships among dog owners' perceptions of, and emotional and behavioral responses to, problematic situations involving their dogs, and investigates differences in these in different subgroups of owners. The dominant sequence of the interaction is defined as...