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Resources (61-80 of 151)

  1. Influence of the sexual receptive of a teaser ewe on the mating preference in the ram

    Contributor(s):: Signoret, J. P.

    Nine sexually experienced rams were each presented in sexual behaviour tests with 3 restrained, ovariectomised ewes injected with progesterone, oestrogen or androgen. Neither the behavioural status of the female (oestrous or not), nor the hormonal treatment, influenced the orientation of the male...

  2. Effect of changing the teaser ewe on the sexual activity of the ram

    Contributor(s):: Thiery, J. C., Signoret, J. P.

    In an experiment involving 3 Romanov and 6 Ile-de-France rams, changing the teaser ewe during a sexual behaviour test resulted in a significant increase in the level of sexual motivation in the ram, as measured by nudging frequency, compared with rams kept continuously with the same ewe. A...

  3. Sexual behavior of dwarf and normal genotypes in divergent growth lines of chickens

    Contributor(s):: Blohowiak, C. C., Siegel, P. B., Krey, H. P. van

    Comparisons of several reproductive factors were made among dwarf, heterozygous and normal sized birds in lines selected for high (HW) and low (LW) juvenile body weight. Semen concentration (X109/ml) was significantly greater in the HW than in the LW line (5.6 plus or minus 0.3 vs. 4.7 plus or...

  4. The sexual behaviour in experimentally underfed bulls

    Contributor(s):: Wierzbowski, S.

    Of 8 pairs of identical twins, one brother was fed 500 g protein daily and the other bull 700 g, from 18 mth of age. At 5 yr of age, live weight in the underfed bulls was 235 kg lower than in the others. Sexual behaviour, as assessed by total semen collection time, number of mounts/copulation,...

  5. A quantitative study of pre-ovulatory behaviour in cattle (British Friesian heifers)

    Contributor(s):: Esslemont, R. J., Glencross, R. G., Bryant, M. J., Pope, G. S.

    24 British Friesian heifers with normal oestrous cycles were observed continuously for 24 days. The exhibition of 13 components of behaviour was recorded. The 11 most frequently seen components which involved the participation of 2 heifers were classified as aggressive (butting), investigatory...

  6. 'Libido' in the larger farm animals: a review

    Contributor(s):: Wodzicka-Tomaszewska, M., Kilgour, R., Ryan, M.

    The term 'libido', first used by Freud to refer to the force by which the sexual instinct is represented in the mind, has become more and more used to refer to some aspects of sexual behaviour in large domestic animals. From being a wide, rather imprecise term, it has come to be defined in a...

  7. Relationship between the incidence of pre-ovulatory behaviour and the concentrations of oestradiol-17 beta and progesterone in bovine plasma

    Contributor(s):: Glencross, R. G., Esslemont, R. J., Bryant, M. J., Pope, G. S.

    The incidence of 11 components of behaviour exhibited by 24 British Friesian heifers was recorded over a 24-day period. Components were classified into 4 groups: standing, mounting, initiating behaviour (other than mounting), and receiving behaviour (other than standing). There was a peak in the...

  8. Social maturation and productivity in bighorn sheep: are young males incompetent?

    Contributor(s):: Shackleton, D. M.

    Two populations of bighorn sheep (Ovis canadensis canadensis) were studied; one was unhunted, and in the other the 3 oldest [male][male] were removed during the hunting season. One month later, the remaining 9 males (aged 2.5-7.5 yr) courted and successfully copulated with adult oestrous...

  9. Effects of individual vs. group rearing on the sexual behaviour of prepuberal beef bulls: mount orientation and sexual responsiveness

    Contributor(s):: Silver, G. V., Price, E. O.

    Ten Hereford bulls were reared from birth in 2 groups of 5 animals, and 10 bulls were physically isolated in individual pens. At 3, 4.5 and 6 months of age, they were all exposed to adult oestrous [female][female]. Individually-raised bulls initially exhibited a significantly higher proportion of...

  10. Relationships between social behaviour and mounting activity of Zebu cattle ( Bos indicus )

    Contributor(s):: Solano, J., Orihuela, A., Galina, C. S., Montiel, F., Galindo, F.

    To identify which of the behavioural signs occurring around oestrus might be relevant for improving oestrous detection and to identify a possible pattern among these signs for use in predicting mounting behaviour in Bos indicus, a herd of 18 Brahman cows were continuously observed for 40 days....

  11. Effect of training ram hoggets on their adult sexual behaviour

    Contributor(s):: Srivastava, R. S., Mathur, A. K., Kalra, D. B.

    Male and [female] lambs were weaned at 3 months of age and kept in separate flocks. Rams were trained for semen collection at regular intervals between 6 and 18 months of age, using an artificial vagina on an oestrogen-injected ewe (group 1), or screened for semen quality but not trained (group...

  12. Mounting efficiencies, courtship behaviour and mate preference of boars under multi-sire mating

    Contributor(s):: Tanida, H., Murata, Y., Tanaka, T., Yoshimoto, T.

    The mating behaviour of boars over a 72-h period in summer was studied. Four groups, each of 2-4 boars, were placed in a pen with 4 oestrous and 4 anoestrous sows. Boars often mounted sows in oestrus, but rarely attempted to mount anoestrous sows. The number of mounts varied among boars in a pen....

  13. Disruptive mating behaviour by subadult Armenian wild sheep in Iran

    Contributor(s):: Valdez, R., Cardenas, M., Sanchez, J.

    The mating behaviour of isolated populations of Armenian wild sheep (Ovis orientalis gmelini) and Transcaspian urial (Ovis orientalis arkal) was studied during the rutting season in Dec. 1972, and Nov. and Dec. 1973 resp. Males were grouped into 2 age classes, =5 yr. Typically, older rams...

  14. Sexual activities and oestrus detection in lactating Holstein cows

    Contributor(s):: Vliet, J. H. van, Eerdenburg, F. J. C. M. van

    During 6 weeks, the oestrous behaviour of all non-pregnant cows on 2 dairy farms was observed for periods of 30 min at 2 h intervals. Cows were housed in a free stall with cubicles and a concrete slatted floor. Pedometers were used to measure the physical activity of the cows throughout the...

  15. Activity in a hunted and an unhunted herd of Dall sheep

    Contributor(s):: Singer, F. J., Murphy, E. C., Cooper, B. A., Laing, K. K.

    The activity patterns of Dall sheep rams (Ovis dalli) of various horn size were studied during the rut in 3 herds (1 hunted and 2 unhunted). In all 3 herds, rams with horns that were superscript 3/4-curled and smaller rams were less frequently seen in ewe bands as the rut progressed. In 1 herd in...

  16. Genetic correlation of ram sexual performance with ewe reproductive traits of four sheep breeds

    Contributor(s):: Snowder, G. D., Stellflug, J. N., Vleck, L. D. van

    Rams express differences in sexual performance during the breeding season. Breeding rams with high sexual performance scores as measured during a sexual performance test can improve flock fertility. Whether selecting rams for high sexual performance score will indirectly improve ewe reproductive...

  17. 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...

  18. 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...

  19. The influence of factors associated with oestrus on the sexual "attractiveness" of ewes to rams

    Contributor(s):: Tilbrook, A. J.

    The influence on sexual attractiveness of ewes of the stage of oestrus of the ewes, the dose of oestradiol benzoate (ODB) used to induce oestrus, the oestrous state of the ewes, and the order that the ewes had been detected in oestrus were considered in 4 experiments. In the 1st experiment, 12...

  20. Physical and behavioural factors affecting the sexual "attractiveness" of the ewe

    Contributor(s):: Tilbrook, A. J.

    In the 1st of 2 experiments, groups of 6 oestrous ewes that had been assigned to 1 of 3 mating treatments were presented to 10 rams and ranked for sexual attractiveness. Two ewes in each group were new, unmated and were recently in oestrus (U), another 2 were new and had been mated by some other...