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Tags: Group size + Animal rights

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  1. Aggression and welfare in a common aquarium fish, the Midas cichlid

    Contributor(s):: Oldfield, R. G.

    Many species of fishes are aggressive when placed in small aquaria. Aggression can negatively affect the welfare of those individuals toward whom it is directed. Animals may behave aggressively in order to defend resources such as food, shelter, mates, and offspring. The decision to defend...

  2. Dairy cow behavior and welfare implications of time waiting before entry into the milking parlor

    Contributor(s):: Dijkstra, C., Veermae, I., Praks, J., Poikalainen, V., Arney, D. R.

    The objective of this study was to investigate dairy cows' time spent in the possibly stressful waiting area (WA) of the milking parlor (MP) and their behavioral patterns while there and thereby investigate comparative effects on their welfare. The experiments were carried out in 3 loose-housing...

  3. Rat's demand for group size

    Contributor(s):: Patterson-Kane, E. P., Hunt, M., Harper, D.

    Social isolation compromises the welfare of rats. However, it is not clear how many rats should be housed together under laboratory conditions. Pair housing, sometimes recommended over group housing, may help avoid aggression and disease transmission. Female rats, however, showed the highest...

  4. A survey of the attitudes of stakeholders in the zoo industry towards the husbandry requirements of captive Great Apes

    Contributor(s):: Fernie, A. C., Tribe, A., Murray, P. J., Lisle, A., Phillips, C. J. C.

  5. Assessing pig welfare at stunning in Swedish commercial abattoirs using CO<sub>2</sub> group-stun methods

    Contributor(s):: Atkinson, S., Velarde, A., Llonch, P., Algers, B.

  6. Keeping horses in groups: a review

    Contributor(s):: Hartmann, E., Sondergaard, E., Keeling, L. J.

  7. The effect of group size and stocking density on the welfare and performance of hens housed in furnished cages during summer

    Contributor(s):: Guo, Y. Y., Song, Z. G., Jiao, H. C., Song, Q. Q., Lin, H.

  8. The effect of housing system on the behaviour and growth parameters of fattening rabbits

    Contributor(s):: Postollec, G., Boilletot, E., Maurice, R., Michel, V.

  9. Familiarity and group size affect emotional stress in Japanese Black heifers

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

    We compared behavioural and cardiac responses to emotional stresses between familiar and unfamiliar heifers in groups of two or five. Fourteen Japanese Black heifers were divided into two experimental groups of two individuals (F2) and two groups of five individuals (F5) that were familiar with...

  10. Human-cattle interactions in group housing. (Special Issue: Behaviour and welfare of cattle)

    Contributor(s):: Raussi, S.

    In traditional European tie stall barns the stockperson has close interaction with the cattle several times a day. New barns are, however, mostly loose housing units where the animals are group housed and normally have space to evade people. As group housed cattle can be less habituated to...

  11. Welfare implications of captive primate population management: behavioural and psycho-social effects of female-based contraception, oestrus and male removal in hamadryas baboons ( Papio hamadryas ). (Special issue: Primates in zoos)

    Contributor(s):: Plowman, A. B., Jordan, N. R., Anderson, N., Condon, E., Fraser, O.

    In response to overpopulation, management actions were taken over a 5-year period to reduce group size and slow the population growth rate of hamadryas baboons at Paignton Zoo Environmental Park. Management involved three planned removals of several individuals and implantation of all adult...

  12. Spatial distribution and behaviour of laying hens housed in an alternative system

    Contributor(s):: Channing, C. E., Hughes, B. O., Walker, A. W.

    The spatial distribution and behaviour of perchery housed laying hens were compared at a constant stocking density (18.5 birds/m2) in eight pens with colonies of five different sizes (323 birds (N=1), 374 birds (N=2), 431 birds (N=2), 572 birds (N=1) and 912 birds (N=2)). The birds were placed in...

  13. Selfish animals and robot ethology: using artificial animals to investigate social and spatial behavior

    Contributor(s):: Stricklin, W. R., Zhou, J. Z., Gonyou, H. W.

  14. The effect of group size on the behaviour and welfare of four fish species commonly kept in home aquaria

    Contributor(s):: Saxby, A., Adams, L., Snellgrove, D., Wilson, R. W., Sloman, K. A.

    Previous research into fish welfare has focussed particularly on commercially important aquaculture species. However, with over 350 million fishes traded annually within the ornamental fish industry, surprisingly little consideration has been given to the welfare of fish kept in home aquaria....

  15. The impact of group size on damaging behaviours, aggression, fear and stress in farm animals. (Special issue: Too many, too few: the effects of group size and density in captive animals.)

    Contributor(s):: Rodenburg, T. B., Koene, P.

    The aim of this review is to discuss the impact of group size on damaging behaviours, aggression, fear and stress in farm animals and to identify housing- and management options that can help to reduce problems caused by suboptimal group sizes. Increasing group size was found to increase the risk...

  16. Group size: determinants in the wild and implications for the captive housing of wild mammals in zoos. (Special issue: Too many, too few: the effects of group size and density in captive animals.)

    Contributor(s):: Price, E. E., Stoinski, T. S.

    Group size is one of the most important factors influencing the formation and maintenance of successful social groups in captivity. For zoos, appropriate social groupings are of the utmost importance to provide examples of species-typical behaviors, as well as attain captive breeding goals. In...

  17. More than numbers matter: the effect of social factors on behaviour and welfare of laboratory rodents and non-human primates. (Special issue: Too many, too few: the effects of group size and density in captive animals.)

    Contributor(s):: Olsson, I. A. S., Westlund, K.

    With the development of laboratory animal science, increasing attention has been given to the possible influence of housing and husbandry on the behaviour and welfare of laboratory animals as well as on the scientific integrity. With the present paper, we aim to contribute to this knowledge by...

  18. The welfare of gestating sows in conventional stalls and large groups on deep litter

    Contributor(s):: Karlen, G. A. M., Hemsworth, P. H., Gonyou, H. W., Fabrega, E., Strom, A. D., Smits, R. J.

    Confinement of breeding sows and gilts is a controversial welfare issue in livestock production and there is worldwide interest in finding alternative housing systems for gestating pigs. This study measured aspects of the welfare of gestating sows housed in either large groups on deep litter...

  19. Effects of social environment on welfare status and sexual behaviour of female pigs. I. Effects of group size

    Contributor(s):: Barnett, J. L., Hemsworth, P. H., Winfield, C. G., Hansen, C.

    The study examined the effects of housing 24 adult female pigs in groups of 2, 4 or 8 with a space allowance of 1.4msuperscript 2 per pig on welfare status, as indicated by plasma free-corticosteroid concentrations and behaviour patterns, and sexual behaviour. Housing gilts in pairs resulted in...

  20. Group size and cognitive processes. (Special issue: Too many, too few: the effects of group size and density in captive animals.)

    Contributor(s):: Croney, C. C., Newberry, R. C.

    Animal group sizes may exert important effects on various cognitive mechanisms. Group size is believed to exert pressures on fundamental brain structures that correlate with the increased social demands placed on animals living in relatively large, complex and dynamic social organizations. There...