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  1. Evaluation of the sexual behavior and testosterone concentrations of Mangalarga Marchador stallions

    Contributor(s):: Rua, M. A. S., Quirino, C. R., Bastos, R., Bartholazzi Junior, A., Santoro, P. N., Ribeiro, M. da S., Matos, L. F., Barreto, M. A. P.

    Assessing the sexual behavior of stallions is extremely important because sexual behavior is linked to reproductive efficiency. The objective of this study was to evaluate the sexual behavior, testosterone concentration and libido of Mangalarga Marchador stallions from northern Rio de Janeiro...

  2. Training large macaws for artificial insemination procedures

    Contributor(s):: Leblanc, F., Pothet, G., Jalme, M. S., Dorval, M., Bovet, D.

    For some endangered parrot species, captive breeding may be the only insurance for their survival. However, many individuals in captivity do not reproduce. Artificial insemination (AI) may help overcome reproductive failures or geographic distance. For semen collection in birds, massage is the...

  3. Sexual behavior and semen characteristics of rams exposed to their own semen or semen from a different ram on the vulva of the ewe

    Contributor(s):: Lezama, V., Orihuela, A., Angulo, R.

    Eighteen Katahdin yearling males were used to evaluate sexual behaviours, inter-ejaculation intervals and semen characteristics of rams exposed to their own semen or semen from a different ram in the vulva of the ewe. Each ram participated in three experimental sessions spaced 8 days apart. In...

  4. An ethicist's commentary on the case of collecting semen from a crippled bull

    Contributor(s):: Rollin, B. E.

  5. An ethicist's commentary on the reproductively unsound bull

    Contributor(s):: Rollin, B. E.

  6. 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...

  7. The sexual behaviour of experimentally underfed bulls

    Contributor(s):: Wierzbowski, S.

    Bulls (18 months old) from each of eight pairs of twins were divided into two groups which were fed a diet containing either 700 g (controls) or 500 g (experimental) crude protein. Sexual behaviour and semen columes were noted every two months until the bulls were five years old. At five years...

  8. 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...

  9. Sexual stimulation of male dairy goats

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

    Males (6 Saanen, 1 Toggenburg and 1 Nubian [Anglo-Nubian]) were individually exposed to a single restrained oestrous Saanen [female] which served as a natural-mating stimulus or as a teaser [female] for semen collection. Tests were conducted on [male][male] with another [male] watching in a...

  10. 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...

  11. Behavioural reactions, semen quality and testosterone levels in cocks: genetic implications

    Contributor(s):: Ferrante, V., Verga, M., Mangiagalli, M. G., Carenzi, C.

    Intense selection for productivity may have indirectly affected some behavioural traits in poultry. Intensive husbandry systems change rapidly, and the animals may have difficulties in coping with their environment and management. The aims of this study are to examine the fear reactions of two...

  12. Genotype rather than non-genetic behavioural transmission determines the temperament of Merino lambs

    Contributor(s):: Bickell, S., Poindron, P., Nowak, R., Chadwick, A., Ferguson, D., Blache, D.

    Merino ewes have been selected, over 18 generations, for calm (C) or nervous (N) temperament using an arena test and an isolation box test. We investigated the relative contributions of genotype versus the post-partum behaviour of the dam on the temperament of the lambs using a cross-fostering...

  13. An international gene bank for guide dogs: organisation, utilization and potential

    Contributor(s):: Kolosi, J., Gunn, I. M.

    The Royal Guide Dogs Association of Australia (RGDAA) has a breeding population of Labrador Retrievers consisting of 30 females and 11 stud males. Frozen semen from guide dog centres in UK and USA is used in its breeding programme to minimize inbreeding. The RGDAA is establishing an international...