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Resources (101-120 of 151)

  1. 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...

  2. A review of some factors affecting the expression of libido in beef cattle, and individual bull and herd fertility

    Contributor(s):: Petherick, J. C.

    This paper examines some of the factors that affect the expression of libido in beef cattle, focusing on the male and the free-ranging situation. The ways in which bull libido is assessed and the relationship between libido test results and fertility are discussed. Genetics play a role in...

  3. 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...

  4. Behavioural patterns of zebu bulls towards females synchronised with PGF<sub>2 alpha </sub>; or oestrogens under corral and field conditions

    Contributor(s):: Piccinali, R., Galina, C. S., Navarro-Fierro, R.

    32 zebu bulls were tested to determine their behavioural patterns towards 5 cows previously synchronized with PGF2 alpha or oestrogens. Animals were tested 8 times at intervals of 20 days, for 15 min each time, in a corral (7 x 15 m) and given a score for sexual behaviour (0 = no sexual...

  5. Behavioral responses of bulls kept under artificial breeding conditions to compounds presented for olfaction, taste or with topical nasal application

    Contributor(s):: Presicce, G. A., Brockett, C. C., Cheng, T., Foote, R. H., Rivard, G. F., Klemm, W. R.

    The object of this study was to test practical ways of influencing behaviour of bulls used for artificial insemination. Dairy bulls that were sexually active with regular semen collections were compared with sexually inactive bulls housed elsewhere, after being sampled in artificial breeding as...

  6. 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...

  7. Sexual stimulation in male sheep and goats

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

    Previous research has shown that the sexual performance of male goats is enhanced by viewing the mating activities of other males prior to being placed with sexually receptive females. This same experience has no effect on the sexual performance of male sheep. In this experiment, 14 male goats...

  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. A note on genetic parameters for estrus symptoms in sows

    Contributor(s):: Gade, S., Bennewitz, J., Kirchner, K., Looft, H., Knap, P. W., Thaller, G., Kalm, E.

    Showing clear estrus symptoms contributes to the reproductive effectiveness of a sow. The aim of the study was to estimate genetic parameters and breeding values for estrus symptoms, a trait which included swelling and reddening of the vulva, interest in the boar and strength of the standing...

  11. Bull sexual behaviour tests: stimulus cow affects performance

    Contributor(s):: Garcia, M. C., McDonnell, S. M., Kenney, R. M.

    64 Santa Gertrudis bulls were subjected to 3 series of sexual behaviour tests in which a bull was exposed to a restrained cow in a small pen for 10 min. Forty preovulatory and 22 postovulatory cows were used. Preovulatory cows elicited a significantly greater mount orientation response (sudden...

  12. 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...

  13. The influence of handling by humans on the behaviour, reproduction and corticosteroids of male and female pigs

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

    The influence of three handling treatments was studied in 15 male and 30 female pigs. Two handling treatments, considered as pleasant and unpleasant, were imposed for 5 min, three times a week from 11 weeks of age. The third handling treatment involved minimal contact with humans from 11 weeks of...

  14. The influence of mating conditions on the sexual behaviour of male and female pigs

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

    Sixteen boars, aged 7 months, and 48 ovariectomised gilts, aged 7 months, were randomly allotted to mating in the boar's accommodation pen (boar pen treatment) or in an octagonal mating pen (mating pen treatment). One of 2 groups of gilts was induced into behavioural oestrus on alternate wk...

  15. Frequency of masturbation and time budgets of dairy bulls used for semen production

    Contributor(s):: Houpt, K. A., Wollney, G.

    The behaviour of 9 Holstein bulls used for semen production was analysed from 1-min scan samples of video tape recordings. Bulls, individually stalled in a barn containing many other bulls, masturbated 1.4+or-3 times per 24 h, almost always in the early morning (05.00 h) and late afternoon (16.00...

  16. The effects of superovulation hormone treatments on the frequency of estrous behaviours in cows

    Contributor(s):: Jezierski, T.

    Superovulation was induced in 37 Polish Black-and-White Lowland dairy cows by injections of cloprostenol (a PGF2 alpha analogue) and FSH. 120 untreated herdmates were used as controls. The frequencies of mountings and vulva sniffings during a total of 275 oestrous cycles during which cows...

  17. Harem size and reproductive success of stallions in Misaki feral horses

    Contributor(s):: Kaseda, Y., Khalil, A. M.

    Over a 16-year period (1979-1994) investigations were carried out on 14 Misaki feral stallions to analyse changes in harem size and reproductive success. Between 4 and 6 years of age most stallions formed harem groups with 4 to 5 mares. The number of mares rapidly increased and was at a maximum...

  18. Stimuli-related variation in urination frequency of female white-tailed deer during the estrous cycle

    Contributor(s):: Gassett, J. W., Osborn, D. A., Rickard, J. K., Marchinton, R. L., Miller, K. V.

    Variations in urination frequency of female white-tailed deer (Odocoileus virginianus) that appeared to be dependent on stage of the oestrous cycle and type of disturbance stimuli were observed, and possible causes for this potential chemosensory behaviour were evaluated. Eight does were exposed...

  19. Early differentiation of male and female interactive behaviour as a possible mechanism for sexual segregation in mouflon sheep ( Ovis gmelini )

    Contributor(s):: Guilhem, C., Bideau, E., Gerard, J. F., Maublanc, M. L., Pepin, D.

    Interactive behaviour and the spatial relationships of mouflon lambs with their mothers and peers were studied in an enclosed population to look for possible early differentiation between the sexes in their social behaviour. The acts received (affiliative, sexual and agonistic behaviours) and...

  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...