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  1. The effect on social organization and milk production of minor group alteratlons in dairy cattle

    Contributor(s):: Collis, K. A., Kay, S. J., Grant, A. J., Quick, A. J.

    2 groups of 15 and 12 cows resp. were maintained under identical conditions of management. The 2 most dominant cows from the 1st group were transferred to the 2nd group then returned 2 wk later. After a further 4 wk, the 2 most subordinate cows from the 1st group were transferred to the 2nd group...

  2. Effect of social conditions during rearing on mating behaviour of gilts

    Contributor(s):: Soede, N. M., Schouten, W. G. P.

    28 gilts were studied from an av. age of 137 days. Ten gilts were housed individually, having neither tactile nor visual contact with other pigs. The remaining 18 gilts were housed in pairs and had additional contact with gilts in adjacent pens and daily boar contact from 180 days of age. At the...

  3. Importance of behavioural stimuli in ram-induced ovulation in seasonally anovular Corriedale ewes

    Contributor(s):: Rodriguez Inglesias, R. M., Ciccioli, N. H., Irazoqui, H., Rodriguez, B. T.

    Three groups of about 65 seasonally anovular Corriedale ewes were penned and exposed to rams on 4 Nov. A 4th group (n = 64) was maintained in a 3-ha paddock and also exposed to rams on the same date. Sexual behaviour exhibited by rams in contact with penned ewes was recorded during 9 simultaneous...

  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. 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...

  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. 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...

  8. Early exposure to the opposite sex affects mating behaviour in White Leghorn chickens

    Contributor(s):: Leonard, M. L., Zanette, L., Thompson, B. K., Fairfull, R. W.

    White Leghorn fowls were raised from 6 to 18 wk of age with birds of both sexes (mixed-sex) or in single-sex groups (same-sex). Groups of 6 [female][female] and 1 [male] were then assigned to 4 treatments: (1) mixed-sex [female][female] with a mixed-sex [male] (MM), same-sex [female][female] with...

  9. 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...

  10. 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]...

  11. 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...

  12. Sexual preference of mares ( Equus caballus ) for individual stallions

    Contributor(s):: Pickerel, T. M., Crowell-Davies, S. L., Caudle, A. B., Estep, D. Q.

    Eight mares were tested to determine if they remained near 1 of 2 stallions longer than would be expected if association was random. Six stallions were paired in 30 combinations and each mare was tested 30 times. The mares demonstrated a definite preference for individual stallions throughout the...

  13. The effect of early exposure to the opposite sex on mate choice in White Leghorn chickens

    Contributor(s):: Leonard, M. L., Zanette, L., Clinchy, M.

    1000 female and 148 male Leghorn fowls were reared in all-female (140/pen), all-male (50/pen) or mixed pens (12 males and 140 females/pen). Males and females reared in mixed pens were separated at 18 weeks of age to prevent them from gaining adult sexual experience. Mate choice trials were...

  14. 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...

  15. The relationship of male-male mounting to the sexual preferences of young rams

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

    The relationship between the frequency of [male]-[male] mounting in young rams in all-[male] groups and their subsequent preferences for [female] vs. [male] sexual partners was investigated. Mount interactions were monitored in the home pen of 29 rams reared in 1984 and 25 rams reared in 1985. At...

  16. 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...

  17. 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...

  18. 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...

  19. 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...

  20. 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...