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  1. Oestrus and mating behaviour in gilts during boar induced puberty in relation to stress and housing

    Contributor(s):: Pedersen, L. J., Jensen, K. H., Giersing Linder, A.

    The effect of intermittent electroshock and individual vs. pair housing on sexual proceptive behaviour was studied in 48 large White x Danish Landrace gilts. In addition, the effect of intermittent electroshock on the behavioural response to boar stimulation and on sexual receptivity during first...

  2. Agonistic and mating behavior of adult chickens modified by social and physical environments

    Contributor(s):: Craig, J. V., Bhagwat, A. L.

    Agonistic and mating behaviour in 48 flocks of adult White Leghorn fowls was observed for 8 wk. A factorial experimental design allowed evaluation of behaviour as affected by genetic strain, presence or absence of males , age group (initial ages of 32 or 48 wk), and less crowded floor pens...

  3. The effect of two post-weaning management systems on the social and sexual behaviour of zebu bulls

    Contributor(s):: Macfarlane, J. S.

    Over a 4-yr period, 200 Boran X Sahiwal bulls were reared on an unrestricted system (in a ranch herd of 400 head, comprising mature stud bulls) and 100 on a restricted system (in paddocks and in groups of 4-5 bulls, both remaining unchanged throughout). At about 3 yr of age and 450 kg live...

  4. Detection of oestrus in gilts housed adjacent or opposite boars or exposed to exogenous boar stimuli

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

    24 twelve-month-old gilts, housed in groups of 6, were studied in a 4 x 4 Latin square experiment. Gilts were housed opposite to boars, separated by a corridor 1 m wide ('opposite' group); adjacent to boars, separated by a wire mesh wall ('adjacent' group), isolated from boars and exposed to boar...

  5. 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...

  6. 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...

  7. Selection of mating partners in boars and sows under multi-sire mating

    Contributor(s):: Tanida, H., Miyazaki, N., Tanaka, T., Yoshimoto, T.

    In the 1st of 2 experiments on a commercial farm, 3 sire groups and 9 sow groups were used to study courtship behaviour between boars and sows. The flow diagram of the behaviours, constructed by sequence analysis, revealed that nosing by boars played an important role in inducing sows to stand...

  8. The influence of different social and physical environments on the incidence of lactational oestrus in sows

    Contributor(s):: Stolba, A., Henderson, R., Wechsler, B.

    The behaviour of sows and their litters housed in different environments of increasing social and physical complexity was observed. Lactational oestrus occurred only in the most complex housing system (4 sows grouped, full boar contact, four indoor pens with four connected outside yards). The...

  9. 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...

  10. Effects of sexual stimulation on the sexual performance of rams

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

    In the 1st of 2 experiments, 11 sexually experienced ram lambs (about 9 months of age) and 18 sexually experienced yearling and 2-yr-old rams were individually exposed to 4 unrestrained, hormone-induced oestrous ewes for 60 min. Before exposure to [female][female], the rams had been allowed or...

  11. 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...

  12. 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...

  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 effects of long-term individual vs. group housing on the sexual behavior of beef bulls

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

    Hereford bulls which had been hand reared from birth and maintained in individual (N=7) or group pens (N=9) until testing at 19 months of age were given sexual performance tests 2 to 3 days apart which consisted of exposing individual bulls to 3 restrained oestrous females for 40 minutes....

  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. A study of the relationships between the attitudinal and behavioural profiles of stockpersons and the level of fear of human and reproductive performance of commercial pigs

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

    Animals on 19 commercial farms were studied. The level of fear of humans by sows was assessed by observing their approach behaviour to an experimenter in a standard 3-min test.The time taken to enter an area within 0.5 m of the experimenter was related to farrowing rate (P

  17. Habituation to boar stimuli: possible mechanism responsible for the reduced detection rate of oestrous gilts housed adjacent to boars

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

    Three experiments are described that examined the effects of housing gilts near or adjacent to boars on the oestrus detection rate and proceptive behaviour of gilts. In the 1st experiment, a higher (P

  18. The effects of continuous boar contact on the oestrus detection rate of weaned sows

    Contributor(s):: Hemsworth, P. H., Hansen, C.

    A study was conducted over an 8-month period at a commercial pig farm to examine the effects of housing weaned sows adjacent to or away from boars on the occurrence of oestrus. 188 sows were studied; boars were used for oestrus detection. A high percentage of sows was detected in oestrus in both...

  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. The influence of conditions at the time of mating on reproduction of commercial pigs

    Contributor(s):: Hemsworth, P. H., Hansen, C., Coleman, G. J., Jongman, E.

    Two mating systems, the Detection-Mating Area (DM) and a conventional mating system, were compared. The DM system involved detecting oestrous [female][female] in an arena closely surrounded on 2 sides by boars and mating these [female][female] in this arena. The system was designed to improve the...