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  1. Maturation and development of social behaviour during early ontogeny in free-ranging dog puppies in West Bengal, India

    Contributor(s):: Pal, S. K.

    Six bitches and their offspring were observed in the natural environment to study the early ontogeny of certain processes like eye opening, nipple preference, play, sexual activities and locomotion. Thirteen puppies out of 35 survived at the age of 3 months indicating 63% mortality. Eye slits...

  2. 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...

  3. 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...

  4. 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...

  5. 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....

  6. The influence of rearing conditions on the social relationships of young male goats ( Capra hircus )

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

    The aim of the present study was to observe the effect of age at the grouping of male domestic goats on social and sexual interactions. Nineteen young male goats, grouped at birth (n=9) or after puberty (n=10), associated with females (1 female per group after puberty of males), were observed in...

  7. The relationship of male-male mounting to mate choice and sexual performance in male dairy goats

    Contributor(s):: Price, E. O., Smith, V. M.

    14 Alpine, 4 Lamancha, 7 Saanen and 6 Toggenburg [male][male], aged 1.5-4 yr, were observed for the incidence of mounting other [male][male] in their home enclosure, and were tested for choice of mate and mounting performance when exposed to [male] and [female] stimulus animals. 24 of the 31...

  8. 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...

  9. 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...

  10. A proposition for an updated behavioural characterization of the oestrus period in dairy cows

    Contributor(s):: Kerbrat, S., Disenhaus, C.

    In high-yielding dairy herds, the difficulty associated with successfully detecting oestrus is a problem that limits the reproductive performance of the herd. Traditionally, the period when the cow stands to be mounted is taken as the oestrus period. Housing and management factors such as the use...

  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. Development of sexual behavior over several serving capacity tests in male goats

    Contributor(s):: Imwalle, D. B., Katz, L. S.

    Results from previous research suggest that male goats, cattle and swine do not require prior sexual experience as juveniles to exhibit their full potential in serving capacity tests as adults. Preliminary data in our laboratory indicate that juvenile goats exhibit profound separation stress from...

  13. 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...

  14. 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...

  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. 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...

  17. Homosexual and social behaviours of young bulls of different geno- and phenotypes and plasma concentrations of some hormones

    Contributor(s):: Jezierski, T. A., Koziorowski, M., Goszczynski, J., Sieradzka, I.

    13 Polish Black-and-White Lowland (PBWL), 9 Hereford and 12 25% European bison-25% PBWL-50% Hereford bulls aged 12-14 months were studied. Some individuals were classified subjectively as typically [male] or more typically [female] by their conformation. The bulls were observed on 6 occasions at...

  18. 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...

  19. Sexual performance of Awassi ram lambs reared in different sex composition groups

    Contributor(s):: Kridli, R. T., Al-Yacoub, A. N.

    The objective of this study was to evaluate the effect of sex composition of the group of lambs before puberty on later sexual performance in Awassi ram lambs. Thirteen Awassi ram lambs of the same age were raised in either all-male group (n=7) or in a group mixed with females (n=6) from weaning...

  20. Social behaviour at and around oestrus of N'Dama cows treated with prostaglandin F<sub>2 alpha </sub>; analogue, cloprostenol

    Contributor(s):: Kabuga, J. D., Gyawu, P., Asare, K., Karikari, P. K., Appiah, P., Awunyo, K., Kwarteng, F. A.

    14 N'dama cows were given 2 intramuscular injections of a PGF2 alpha analogue (cloprostenol) 11 days apart and were then observed continuously from 18 h after each injection for 7 days. The percentage of cows showing standing oestrus was 85.7 and 92.9 after the 1st and 2nd injections resp....