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All Categories (101-120 of 164)

  1. Hormonal release during suckling in the pig in relation to sow and piglet behaviour

    Contributor(s):: Algers, B.

  2. Relationship of circulating estrogen and progesterone concentrations during late pregnancy and the onset phase of maternal behaviour in the ewe

    Contributor(s):: Shipka, M. P., Ford, S. P.

    Five yearling ewes with known breeding dates were accustomed to the presence of the investigator during the gestation period. Each ewe was allowed to lamb in the location of its choice within the small barn and paddock in which it had been housed throughout gestation, and specific maternal...

  3. Stereotypies and cortisol secretion in heifers subjected to tethering

    Contributor(s):: Redbo, I.

    The aims of this study were to assess the effect of tethering on environmentally induced stereotypies and urine cortisol concentrations in Swedish Red and White heifers, and to analyse a possible relationship between the performance of stereotypies and cortisol concentration. Three groups of...

  4. Behavioural patterns and progesterone, cortisol and prolactin levels around parturition in European (Large-White) and Chinese (Meishan) sows

    Contributor(s):: Meunier-Salaun, M. C., Gort, F., Prunier, A., Schouten, W. G. P.

    The behaviour of 7 Large-White (LW) and 7 Meishan (MS) sows was monitored continuously on video from Day 111 of gestation to 24 h post partum (Experiment 1). In a second experiment, plasma levels of progesterone, cortisol and prolactin were measured in 6 LW and 6 MS sows from Day 105 of gestation...

  5. 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...

  6. Comparison of behavioral and physiological responses of dogs wearing two different types of collars

    | Contributor(s):: Ogburn, P., Crouse, S., Martin, F., Houpt, K.

    Physiological and behavioural responses of dogs while wearing two different types of collars were compared. The 2 types of collar were a traditional buckle nylon neck collar, and a newly developed nylon head collar. Before and following tests of obedience training and restraint, measurements were...

  7. Effect of hypothalamic factor treatments on the behaviour of sows during lactation and on their behavioural and cortisol responses to weaning

    | Contributor(s):: Passille, A. M. B. de, Robert, S., Dubreuil, P., Pelletier, G., Brazeau, P.

    The effects of daily treatments between Days 5 and 25 of lactation with growth hormone-releasing factor (GRF:20 micro g/kg) and thyrotropin-releasing factor (TRF: 1 or 9 micro g/kg) on the behaviour of 51 primiparous lactating sows and on their behavioural and cortisol response to weaning...

  8. Effect of hypothalamic factor treatments on the behaviour of sows during lactation and on their response to weaning management

    | Contributor(s):: Passille, A. M. B. de, Robert, S., Pelletier, G., Brazeau, P.

  9. The influence of pleasant and unpleasant handling and the provision of toys on the growth and behaviour of male pigs

    | Contributor(s):: Pearce, G. P., Paterson, A. M., Pearce, A. N.

    This experiment investigated the influence of pleasant or unpleasant handling by humans on the growth, carcass composition, adrenal morphology and behaviour of male pigs, between 40 and 90 kg bodyweight, housed in groups of 8 in barren or enriched pens. Enriched pens were supplied with toys such...

  10. Use of physiological measures to assess individual differences in reactivity

    | Contributor(s):: Manteca, X., Deag, J. M.

  11. A simple method for fostering lambs using anoestrous ewes with artificially induced lactation and maternal behaviour

    | Contributor(s):: Kendrick, K. M., Costa, A. P. da, Hinton, M. R., Keverne, E. B.

    The possibility of a simple method for using anoestrous ewes to foster orphan or triplet lambs was investigated. 22 anoestrous ewes (12 multiparous and 20 multiparous) were given vaginal sponges containing medroxyprogesterone acetate (250 mg) and oestradiol dipropionate (ODP) (25 mg) for 2 wk....

  12. A study of the relative aversiveness of a new daily injection procedure for pigs

    | Contributor(s):: Hemsworth, P. H., Barnett, J. L., Campbell, R. G.

    The aversiveness of a new injection procedure (Injection treatment), developed for daily administration of porcine somatotropin, for pigs over 3 weeks, late in the growing phase, was examined. The injection, via a 13-mm, 16-gauge needle, utilized a low penetration gas injection gun. Observations...

  13. An evaluation of the contribution of isolation, up-ending and wool removal to the stress response to shearing

    | Contributor(s):: Hargreaves, A. L., Hutson, G. D.

    A 2x2x2 factorial experiment examined the effects of 3 components of shearing (isolation, up-ending and wool removal) on the development of a stress response to handling. 10 Merino wethers were allocated to each treatment. Haematocrit, plasma cortisol and plasma glucose were measured in a series...

  14. Behavioural and adrenocortical coping strategies and the effect on eosinophil leucocyte level and heterophil/lymphocyte-ratio in beech marten ( Martes foina )

    | Contributor(s):: Hansen, S. W., Damgaard, B. M.

  15. Changes in heart rate, plasma cortisol and haematocrit of sheep during a shearing procedure

    | Contributor(s):: Hargreaves, A. L., Hutson, G. D.

    Nine Merino wethers were individually subjected to a series of 8 handling treatments of increasing complexity, culminating in partial shearing. The treatments were control, separation from other sheep, isolation, human presence, blood sampling, up-ending, exposure to shearing noise, and wool...

  16. Effects of growth hormone transgenes on the behavior and welfare of aquacultured fishes: a review identifying research needs. (Special issue: Fish Behaviour and Welfare.)

    | Contributor(s):: Hallerman, E. M., McLean, E., Fleming, I. A.

    Expression of a growth hormone (GH) transgene can achieve dramatic impacts upon the performance of aquaculture stocks, for example, increasing the growth rate of coho salmon 11-fold. With the prospect of improved production efficiency, some aquaculturists want to produce transgenic fish...

  17. 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...

  18. Evaluation of the effects of a socialization program in a prison on behavior and pituitary-adrenal hormone levels of shelter dogs

    | Contributor(s):: Hennessy, M. B., Morris, A., Linden, F.

    This study examined outcomes of an ongoing socialization program for shelter dogs conducted at a local prison. Dogs residing at a Humane Society facility were assigned to either a "Control" or "Socialization" treatment. Dogs assigned to both treatments were administered a pretest at the Humane...

  19. Homosexual and social behaviours of young bulls of different geno- and phenotypes and plasma concentrations of some hormones

    | Contributor(s):: Jezierski, T. A., Koziorowski, M., Goszczynski, J., Sieradzka, I.

    13 Polish Black-and-White Lowland (PBWL), 9 Hereford and 12 25% European bison-25% PBWL-50% Hereford bulls aged 12-14 months were studied. Some individuals were classified subjectively as typically [male] or more typically [female] by their conformation. The bulls were observed on 6 occasions at...

  20. Relationship between immune response, liveweight gain, behaviour and adrenal function in red deer ( Cervus elaphus ) calves derived from wild and farmed stock, maintained at two housing densities

    | Contributor(s):: Hanlon, A. J., Rhind, S. M., Reid, H. W., Burrells, C., Lawrence, A. B., Milne, J. A., McMillen, S. R.

    Immune response and other potential measures of stress were assessed in 40 weaned red deer calves in a 2 x 2 factorial experiment. Replicate groups of five calves (aged about 3 months) born to dams from two sources (wild, (W) or farmed, (F)) were housed at weaning at one of two stocking densities...