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  1. The effect of perches and aviary tiers on the mating behaviour of two hybrids of broiler breeders

    Contributor(s):: Gebhardt-Henrich, Sabine G., Jordan, Anja, Toscano, Michael J., Würbel, Hanno

    Broiler breeders are kept for the production of fertile eggs. They face serious welfare problems like aggressive behaviour of the males towards females during mating. Furthermore, broiler breeders are usually kept without perches which are a highly valued resource in chickens. The aim of the...

  2. The behavioural effects of supplementing diets with synthetic and naturally sourced astaxanthin in an ornamental fish (Puntius titteya)

    Contributor(s):: Eaton, Lewis, Clezy, Kristian, Snellgrove, Donna, Sloman, Katherine

    Carotenoids are routinely incorporated into ornamental fish diets with the aim of enhancing companion fish colouration which may concomitantly affect fish behaviour. Previously, colour enhancement has typically been achieved using synthetic carotenoids, however, there is now growing public demand...

  3. Acoustic characteristics of courtship and agonistic vocalizations in Przwewalskii's wild horse and in domestic horse

    Contributor(s):: Alberghina, Daniela, Caudullo, Eugenia, Chan, Winnie Y., Bandi, Namkhai, Panzera, Michele

    For closely related species living in similar habitats, differences in the acoustic morphology of vocalizations could play a role in mate recognition as well as provide insight into the evolutionary divergence between species. Przwewalski's horses ( Equus Przwewalskii) and Mongolian domestic...

  4. Social behavior of domestic cats in the human home

    Contributor(s):: Bernstein, P. L., Friedmann, Erika, Turner, D. C., Bateson, P.

  5. An integrative analysis of reproduction and stress in free-living male cottonmouths, Agkistrodon piscivorus

    Contributor(s):: Sean Patrick Graham

    I conducted an integrative field study on male cottonmouths (Agkistrodon piscivorus), a common pitviper of the southeastern United States, to investigate the evolution of contrasting mating patterns in North American pitvipers (bimodal and unimodal annual patterns) and resolve conflicting...

  6. Do female broiler breeder fowl display a preference for broiler breeder or laying strain males in a Y-maze test?

    Contributor(s):: Millman, S. T., Duncan, I. J. H.

    In recent years, the commercial broiler breeder industry has reported problems of male aggression towards females. Although this aggression is shown by the males and is apparently a defect in their behaviour, it is also possible that it stems in some way from the females. For example, broiler...

  7. Effect of early fenceline exposure to estrous ewes on the sexual performance of yearling rams

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

    A total of 104 rams, 7-8 months of age, were given either no contact (NC), direct contact (DC) or fenceline (FL) exposure to oestrous ewes during a 3-week period in the autumn breeding season. When initially tested for sexual performance at 18-19 months, a higher proportion of NC rams exhibited...

  8. Exposure to a recently mated male increases ram sexual performance

    Contributor(s):: Maina, D., Katz, L. S.

    Previous studies reported that the sexual performance of rams did not improve following observation of heterosexual behaviour, which was in contrast to effects on male cattle, goats, pigs and horses. The purpose of this study was to investigate the possibility that exposure to a recently mated...

  9. Gender effects on aggression, dominance rank, and affiliative behaviors in a flock of captive adult cockatiels ( Nymphicus hollandicus )

    Contributor(s):: Seibert, L. M., Crowell-Davis, S. L.

    Agonistic and affiliative behaviours and spatial positioning were studied in a small psittacine species, N. hollandicus. Subjects studied were flock-housed breeders including 5 hens and 7 cocks. 15-minute focal animal samples were collected for the entire flock in a randomly distributed order...

  10. Inter- and intra-sexual behaviour of free-ranging dogs ( Canis familiaris )

    Contributor(s):: Pal, S. K., Ghosh, B., Roy, S.

    During March 1994 to February 1997 the sexual behaviour of a total of 292 free-ranging dogs was observed weekly in the town of Katwa in West Bengal. Of all resident females, 20 oestrus females were studied as focal animals. The number of males which courted a female ranged from 6 to 28 (mean...

  11. Mating behavior of bucks and does in goat operations under range conditions

    Contributor(s):: Mellado, M., Cardenas, C., Ruiz, F.

    The objectives of this study were to characterize the mating capacity of bucks under range condition and assess the effect of mating frequency on flock fertility. Two adjacent flocks of crossbred goats (Criollo x dairy goat breeds; n = 70 does, 5 bucks and 141 does, 4 bucks) were used. The mating...

  12. 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...

  13. Reproductive and aggressive behavior in male broiler breeders with varying fertility levels

    Contributor(s):: McGary, S., Estevez, I., Russek-Cohen, E.

    Differential male fertility in naturally mated broiler breeders appears to be an inadvertent negative result of genetic selection for growth and high yield. Identifying male behaviors that reliably indicate fertility could improve production while avoiding artificial insemination procedures. We...

  14. Selection for contrasting adrenocortical responsiveness in Japanese quail ( Coturnix japonica ) influences sexual behaviour in males

    Contributor(s):: Marin, R. H., Satterlee, D. G.

    Selection of Japanese quail for a reduced (low stress, LS) rather than exaggerated (high stress, HS) adrenocortical response to brief restraint is associated with a non-specific reduction in stress responsiveness, decreased fearfulness, greater sociality, and enhanced male reproductive function,...

  15. Yearling rams initially disinterested in estrous ewes subsequently exhibit subnormal sexual performance

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

    Individual 30-min sexual performance (serving capacity) tests were administered to 73 Targhee rams at 18-19 months of age. 41 rams (56

  16. Buller steer syndrome review

    Contributor(s):: Blackshaw, J. K., Blackshaw, A. W., McGlone, J. J.

  17. Impact of male-male competition and morphological traits on mating strategies and reproductive success in broiler breeders

    Contributor(s):: Bilcik, B., Estevez, I.

    The goal of this experiment was to determine the effect of male-male competition on broiler breeder mating strategies and reproductive success and to identify behavioral and morphological traits associated with high fertility. Males were kept in groups with no competition (one male and 10...

  18. Incidence of repeat-breeding among Angus bulls ( Bos taurus ) differing in sexual performance

    Contributor(s):: Araujo, J. W. de, Borgwardt, R. E., Sween, M. L., Yelich, J. V., Price, E. O.

    Rams exhibiting relatively high levels of sexual performance (HP) repeat-breed the same female fewer times than low-performing (LP) rams. The objective of this study was to determine if HP and LP bulls differed in their tendency to repeat-breed individual females. Eighteen sexually experienced...

  19. Male influence on proceptivity in ovariectomized French-Alpine goats ( Capra hircus )

    Contributor(s):: Billings, H. J., Katz, L. S.

    Proceptivity is defined as female sexual behaviours that bring the male into closer proximity and maintain his proximity and sexual motivation for mating to occur. The effect of contact with a male on the display of proceptivity was investigated in 7 progesterone- and estradiol-treated...

  20. Post-copulative guarding: mating behaviour of non-territorial male sika deer ( Cervus nippon ) in an enclosure

    Contributor(s):: Endo, A., Doi, T., Shiraki, A.

    The mating behaviour of 4 captive male sika deer, which had no territory or harem, was studied on Nozaki Island, Japan, during October 1990. The males were housed in an enclosure (0.32 square hectares) with 4 females and 1 male yearling. The dominance hierarchy of the males was recorded....