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  1. Behavioral patterns of zebu bulls toward cows previously synchronized with prostaglandin F2 alpha

    Contributor(s):: Orihuela, A., Galina, C. S., Duchateau, A.

    With the objective of comparing the behaviour of synchronized cows in the presence or absence of a bull, 30 Indo-Brazilian cows with a mature corpus luteum, identified by rectal palpation, were injected with 25 mg PGF2 alpha at about day 8 of the cycle for 3 consecutive cycles. Immediately after...

  2. Intrauterine position effects in female swine: subsequent reproductive performance, and social and sexual behavior

    Contributor(s):: Parfet, K. A. P., Ganjam, V. K., Lamberson, W. R., Rieke, A. R., Saal, F. S. vom, Day, B. N.

    The sex of adjacent fetuses has been shown to affect the subsequent behaviour and reproductive performance of rodents. In the present study, sows were slaughtered at day 112 of gestation, and piglets were delivered manually. The piglets' uterine position was recorded as between 2 [female][female]...

  3. Boar-induced puberty in gilts handled pleasantly or unpleasantly during rearing

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

    On 3 days per week, from 80 to 164 days of age, 70 gilts were patted and stroked or were given a brief electric shock when they approached the experimenter during a 3-min handling session. In a 3-min behavioural test at 164 days of age, gilts that had been patted and stroked were quicker to...

  4. An investigation of the roles of boar-component stimuli in the expression of proceptivity in the female pig

    Contributor(s):: Pearce, G. P., Hughes, P. E.

    Combinations of the visual, auditory and/or olfactory cues from boars were presented to 60 Large White X Landrace sows as a choice in the arms of a T-maze. The relative attraction of the sows towards the combinations of stimuli was interpreted as showing that these stimuli elicited proceptive...

  5. The effect of environment and stage of the oestrous cycle on the behaviour of dairy cows

    Contributor(s):: Phillips, C. J. C., Schofield, S. A.

    In a series of 4 experiments, behavioural changes during the perioestrous period of Friesian cows were studied. In the 1st experiment, conducted on 12 cows in cubicles, standing to be mounted was confined to the day of oestrus. Changes in time spent lying or standing in the cubicle or in the...

  6. Behaviour and weight change of red deer calves during different weaning procedures

    Contributor(s):: Pollard, J. C., Littlejohn, R. P., Suttie, J. M.

    In a preliminary pilot trial, 60 [male] and [female] calves were not weaned, or weaned and then confined to a paddock or indoors for 7 days, with or without the presence of 2 hand-reared hinds during confinement. Activities observed over 5 days, starting on the day after weaning, differed among...

  7. Heterosexual experience differentially affects the expression of sexual behavior in 6- and 8-month-old ram lambs

    Contributor(s):: Price, E. O., Borgwardt, R., Dally, M. R.

    201 Targhee ram lambs (6 and 8 months of age) were individually exposed to 4 oestrous ewes for 30 minutes and their behaviour was observed. Rams were exposed to ewes on 4 occasions, 7 days apart. In addition, half of the rams in each age class (experimental rams) were exposed to 16 oestrous ewes...

  8. Rearing bulls with females fails to enhance sexual performance

    Contributor(s):: Price, E. O., Wallach, S. J. R.

    Two groups of 12 Hereford bulls were each reared with 6 ovariectomised [female][female] of the same age from weaning (7 months) to 18 months of age (BMF bulls) while 2 additional groups of 12 [male][male] were reared in the absence of [female][female] (BM bulls). Oestrus was induced in the...

  9. Effects of social environment on welfare status and sexual behaviour of female pigs. II. Effects of space allowance

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

    This study examined the effects of housing groups of adult female pigs (6 pigs per group) with a space allowance of 1, 2 or 3 msuperscript 2 per pig on sexual behaviour and welfare status, determined by plasma free-corticosteroid concentrations. A lower percentage of gilts was detected in oestrus...

  10. Some aspects of the sexual behaviour of stray dogs, Canis familiaris.

    Contributor(s):: Ghosh, B., Choudhuri, D. K., Pal, B.

    Different aspects of sexual behaviour were studied in the stray dog population of Burdwan town. The bitches differed in their degree of attractiveness to [male][male]. There was a positive correlation between the number of [male][male] attempting to mate a given bitch and the duration of their...

  11. The effects of two oestrus detection procedures and intense boar stimulation near the time of oestrus on mating efficiency of the female pig

    Contributor(s):: Hemsworth, P. H., Cronin, G. M., Hansen, C., Winfield, C. G.

    In the 1st of 2 experiments, 32 crossbred gilts, aged 12-14 months and which had exhibited >=6 regular oestrous cycles, were checked each morning for oestrus in the corridor adjacent to boar pens (group 1) or in their own pens, which were separated from the boars pens by a 1.0-m wide corridor...

  12. Influence of the sexual motivation of the boar on the sexual partner preferences of oestrous gilts

    Contributor(s):: Hemsworth, P. H., Price, E. O., Tilbrook, A. J.

    Twelve 1-yr-old boars were ranked on the basis of the total number of copulations achieved and the av. interval to 1st mount in 3 weekly 15-min mating tests. The 4 top-ranking (H) and 4 bottom-ranking (L) boars were assigned to form test pairs. The relative preference of 15-17 ovariectomised...

  13. Olfactory and vomeronasal chemoreception and the discrimination of oestrous and non-oestrous ewe urine odours by the ram

    Contributor(s):: Blissitt, M. J., Bland, K. P., Cottrell, D. F.

    Evidence was obtained that odour access to the vomeronasal organs is not necessary for adult rams to discriminate between oestrous and non-oestrous ewe urine odours. The chemoreceptors mediating this discrimination are located intranasally, probably in the main olfactory epithelium. Zinc sulphate...

  14. Effects of rearing conditions on sexual performance in the ram: practical use

    Contributor(s):: Casteilla, L., Orgeur, P., Signoret, J. P.

    The effects of heterosexual contact during development on early semen production in young rams and on mating capacity in yearlings was examined in 2 experiments. In the 1st experiment, 172 [male] Lacaune lambs were reared in unisexual groups or kept permanently or temporarily with...

  15. Social preferences of domestic ewes for rams ( Ovis aries )

    Contributor(s):: Estep, D. Q., Price, E. O., Wallach, S. J. R., Dally, M. R.

    Four experiments were performed to investigate the social preferences of 16 ewes for potential mating partners. Ewe preferences were assessed by measuring the time spent in proximity to each of 2 restrained rams and/or 1 or 2 restrained ewes in 5- or 20-min tests. In the 1st experiment, oestrous...

  16. 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...

  17. Discrimination between the odours of fresh oestrous and non-oestrous ewe urine by rams

    Contributor(s):: Blissitt, M. J., Bland, K. P., Cottrell, D. F.

    Four sexually experienced adult Suffolk and Cheviot rams were trained by operant conditioning to discriminate between oestrous and non-oestrous ewe urine odours. Fresh oestrous and non-oestrous urine was collected from pairs of ewes during standing oestrus and days 6-11 of the cycle resp., within...

  18. Effects of the peri-pubertal rearing environment on endocrine and behavioural responses to oestrous female exposure in the mature bull

    Contributor(s):: Borg, K. E., Esbenshade, K. L., Johnson, B. H.

    30 American Angus bulls, aged 10-11 months, were reared on (1) pasture without contact with [female][female] (controls), (2) pasture with [female] contact for 2 h at 28-day intervals ([female]-exposed group), or (3) penned individually to restrict direct physical contact with other animals. After...

  19. Effects of composition and density of the group on the performance, behaviour and age at puberty in swine

    Contributor(s):: Clark, J. R., Bell, R. W., Tribble, L. F., Lennon, A. M.

    218 crossbred pigs (Duroc-Hampshire-Landrace-Yorkshire) were assigned to a 2 x 3 factorial experiment, the factors being group composition and density. The group-composition factor consisted of pigs not re-aggregated (group 1), re-aggregated below the median body weight (group 2), and...

  20. The significance of horns and other male secondary sexual characters in female bovids

    Contributor(s):: Estes, R. D.

    A hypothesis is presented which states that [female][female] mimic [male] secondary sexual characters (e.g. through the evolution of horns) to buffer their [male] offspring against the aggression of dominant [male][male], thereby prolonging the presence of their sons in the natal herd and home...