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Tags: Groups + Behavior and behavior mechanisms

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  1. Breed group differences in the unsolvable problem task: Herding dogs prefer their owner, while solitary hunting dogs seek stranger proximity

    Full-text: Available

    | Contributor(s):: Van Poucke, Enya, Höglin, Amanda, Jensen, Per, Roth, Lina S. V.

    The communicating skills of dogs are well documented and especially their contact-seeking behaviours towards humans. The aim of this study was to use the unsolvable problem paradigm to investigate differences between breed groups in their contact-seeking behaviours towards their owner and a...

  2. Effects of grouping piglets and changing sow location on suckling behaviour and performance

    | Contributor(s):: Wattanakul, W., Stewart, A. H., Edwards, S. A., English, P. R.

    36 sows and litters were used to study how suckling behaviour was influenced by grouping of piglets and changing sow location under controlled conditions. Control sows (C) remained in farrowing pens with crates until weaning at 28 days. In treatment 1 (T1), piglets from 3 litters were grouped in...

  3. Group sizes and resting locations of free range pigs when grazing in a natural environment

    | Contributor(s):: Rodriguez-Estevez, V., Sanchez-Rodriguez, M., Gomez-Castro, A. G., Edwards, S. A.

    A herd of 86 Iberian pigs aged 13+or-0.5 months and with an average live weight of 110+or-1.3 kg at the start of the study was followed to monitor their social organisation (spontaneous group size: GS) and resting preferences when free ranging on natural pastures in a dehesa of evergreen oaks...

  4. Space use and agonistic behaviour in relation to sex composition in large flocks of laying hens

    | Contributor(s):: Oden, K., Vestergaard, K. S., Algers, B.

    Experiments were carried out to test the hypothesis that hens in large flocks have home ranges in parts of the pen and that they form subgroups. In a tiered aviary system (density averaged 16 hens/msuperscript 2 of floor area), 8 flocks of 568+or-59 ISA Brown laying hybrids were kept in pens....

  5. The interaction of liveweight and the degree of competition on drinking behaviour in growing pigs at different group sizes

    | Contributor(s):: Turner, S. P., Sinclair, A. G., Edwards, S. A.

    If competition for access to a limited resource is substantial, access to that resource may be allocated disproportionately to different members of a group. Priority may be based on a dominance hierarchy, or on physical characteristics, such as weight. The pattern of drinking behaviour was...

  6. The number of farm mates influences social and maintenance behaviours of Japanese black cows in a communal pasture

    | Contributor(s):: Takeda, K., Sato, S., Sugawara, K.

    A study was performed to investigate optimal group size in cattle in communal pastures where cattle from various farms are turned out: (i) to ascertain if cows derived from each farm form an affiliative group and (ii) to investigate the effect of the number of farm mates on social and maintenance...

  7. 'Subordination style' in pigs? The response of pregnant sows to mixing stress affects their offspring's behaviour and stress reactivity

    | Contributor(s):: Ison, S. H., D'Eath, R. B., Robson, S. K., Baxter, E. M., Ormandy, E., Douglas, A. J., Russell, J. A., Lawrence, A. B., Jarvis, S.

    In various mammals stress during gestation can result in long term effects on the behaviour and physiology of the offspring. The aims of this study were (i) to characterise individual variation among primiparous sows (gilts) in their behavioural and physiological response to a commercially...

  8. Pre-mixing as a technique for facilitating subgroup formation and reducing sow aggression in large dynamic groups

    | Contributor(s):: Durrell, J. L., Beattie, V. E., Sneddon, I. A., Kilpatrick, D.

    The effects of pre-mixing as a technique for facilitating subgroup formation in large dynamic groups was examined. Pre-mixing involved housing small groups of sows together prior to introducing them into an established large dynamic group. Each week, four unfamiliar sows were assigned to either a...

  9. The effect of group housing on feeding patterns and social behaviour of previously individually housed growing pigs

    | Contributor(s):: Bornett, H. L. I., Morgan, C. A., Lawrence, A. B., Mann, J.

    Group housed pigs make less frequent feeder visits of longer duration, and eat at a faster rate than pigs housed individually. They also have lower growth rates which may be due to elevated stress levels resulting from changes in the concentrations of hormones, such as cortisol and adrenaline...

  10. The effects of social exchange between two groups of lactating primiparous heifers on milk production, dominance order, behavior and adrenocortical response

    | Contributor(s):: Hasegawa, N., Nishiwaki, A., Sugawara, K., Ito, I.

    The effects of social hierarchy disturbance by management practice on behaviour and performance of lactating Holstein heifers in a dairy herd in Japan were investigated from 15 October to 10 November 1990. Two groups of 51 primiparous heifers in mid-lactation were used. Almost 50% of the heifers...