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  1. Sex differences in rhesus monkey toy preferences parallel those of children

    Contributor(s):: Hassett, Janice M., Siebert, Erin R., Wallen, Kim

  2. Gender differences in owners interacting with pet dogs: an observational study

    Contributor(s):: Prato-Previde, E., Fallani, G., Valsecchi, P.

    Many studies show that people form strong affectional bonds with their dogs, treating them like family members or children. The present study investigates differences between women and men owners during interactions with their dogs, in a situation designed to investigate attachment and, thus, to...

  3. Stretched until it snaps: Attachment and close relationships

    Contributor(s):: van Ijzendoorn, Marinus H., Bakermans?Kranenburg, Marian J.

  4. A behaviour test on German Shepherd dogs: heritability of seven different traits

    Contributor(s):: Ruefenacht, S., Gebhardt-Henrich, S., Miyake, T., Gaillard, C.

    In this study, genetic and non-genetic effects on behavioural traits were estimated, based on records of the field behaviour test of the Swiss German Shepherd Dog breeding club. This standardized test has been applied since 1949 and comprised the following seven traits: self-confidence, nerve...

  5. A note on behavioural laterality in neonatal lambs

    Contributor(s):: Lane, A., Phillips, C.

    In some mammals behavioural laterality is influenced by the perinatal environment, through stress effects on brain lateralisation, and by gender through variation in testosterone secretion. Therefore, a study was conducted on 54 neonatal lambs to determine whether laterality existed at birth and...

  6. Breed and sex differences in the behavioural attributes of specialist search dogs - a questionnaire survey of trainers and handlers

    Contributor(s):: Rooney, N. J., Bradshaw, J. W. S.

    The behavioural characteristics of specialist search dogs were examined using a survey of 244 dog handlers and trainers. The English Springer Spaniel was the most common breed, followed by the Labrador Retriever, cross breeds and the Border Collie. Individuals of these four breeds varied...

  7. Day-old chicks categorised on latency to peck, exhibit a stable fear pattern until 15 days of age

    Contributor(s):: Salvatierra, N. A., Arce, A.

    Day-old chicks (n=24) of both sexes were individually categorized on the latency to peck pebbles and termed as high latency (HL), moderate latency (ML) or low latency (LL). Anxiolytic doses of diazepam diminished the latency only in the HL category, suggesting that it is the most anxious...

  8. Differences in background and outcome of three behavior problems of dogs

    Contributor(s):: Takeuchi, Y., Ogata, N., Houpt, K. A., Scarlett, J. M.

    In order to characterize the three major behaviour problems, aggression toward owners, aggression toward strangers and separation anxiety, backgrounds of dogs and general outcomes of the behavioural treatments were analyzed retrospectively. There were 169 cases of aggression toward owners, 84...

  9. Directional tracking in the domestic dog, Canis familiaris

    Contributor(s):: Wells, D. L., Hepper, P. G.

    The ability of dogs to determine the direction of a track has been subject to little study. We conducted two experiments to examine the ability of dogs to identify the direction of human-laid trails and explore the mechanisms by which dogs determine directionality. Experiment 1 investigated the...

  10. Domestication effects on foraging strategy, social behaviour and different fear responses: a comparison between the red junglefowl ( Gallus gallus ) and a modern layer strain

    Contributor(s):: Schutz, K. E., Forkman, B., Jensen, P.

    According to the resource allocation theory, behaviours that have high energetic costs should decrease in frequency in breeds that are selected to invest a higher proportion of energy into production traits. We studied differences between red junglefowl, the ancestor of domesticated breeds, and a...

  11. Effects of gender and group size on the time-activity budgets of adult breeding ostriches ( Struthio camelus ) in a farming environment

    Contributor(s):: McKeegan, D. E. F., Deeming, D. C.

    Twenty-six adult ostriches in breeding condition, maintained outdoors, were studied to determine their diurnal time-activity budget in the UK during the months of July and August. Males and females from pairs (1 male, 1 female), trios (1 male, 2 females), a small group (group 1: 3 males 8...

  12. Factors affecting feeding order and social tolerance to kittens in the group-living feral cat ( Felis catus )

    Contributor(s):: Yamane, A., Emoto, J., Ota, N.

    Three feeding sites on Ainoshima Island, located 7 km off the coast of Shingu (Fukuoka Prefecture) and 3 feeding groups of feral cats (Felis catus) were used in experiments conducted from 23 November to 29 December 1993 from 05.00 to 07.00 h and 16.00 to 18.00 h. Members of each feeding group...

  13. Factors associated with the prevalence of stereotypic behaviour amongst Thoroughbred horses passing through auctioneer sales

    Contributor(s):: Mills, D. S., Alston, R. D., Rogers, V., Longford, N. T.

    The objective of this study was to evaluate whether sex, age and/or coat colour were associated with the occurrence of stereotypic behaviour in the horse and to assess whether the occurrence of one type of stereotypy in an individual was associated with the occurrence of another specific type of...

  14. Further evaluation of the developmental asynchrony hypothesis of sex ratio variation

    Contributor(s):: Krackow, S.

    A discussion of differences in the speed of development of male and female blastocysts up to the stage of uterine implantation compared with the developmental stage of the uterus may cause sex ratio biases in response to environmental, physiological and psychological cues. It may also cause sub...

  15. 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...

  16. Long-term effects of tryptophan on behavioural response and growing-furring performance in silver fox ( Vulpes vulpes )

    Contributor(s):: Rouvinen, K., Archbold, S., Laffin, S., Harri, M.

    The effects of dietary tryptophan (TRP) supplementation on behavioural response, body weight, feed intake and winter fur development were assessed in silver fox pups from 28 July until 5 December 1997. Ten males and 10 females received a commercial fox ration (control) and 10 males and 10 females...

  17. Preliminary study of the development of the Flehmen response in Equus caballus

    Contributor(s):: Weeks, J. W., Crowell-Davis, S. L., Heusner, G.

    The flehmen response is commonly seen in most ungulates as well as in several other species (e.g. felids). The behaviour is most often thought to be part of the sexual behavioural repertoire of males. One reigning hypothesis suggests that this behaviour allows the male to determine the oestrous...

  18. Selection for more confident foxes in Finland and Norway: heritability and selection response for confident behaviour in blue foxes ( Alopex lagopus )

    Contributor(s):: Kenttamies, H., Nordrum, N. V., Brenoe, U. T., Smeds, K., Johannessen, K. R., Bakken, M.

    As a part of a Nordic project, 'Selection for more confident foxes', selection experiments with blue foxes lasting 4 years (1995-98) were arranged in Finland and Norway. In Finland, the study was carried out on a private farm with closed selection and production lines. In Norway, the experiment...

  19. Sex influences rat personality more than geographical origin

    Contributor(s):: Korpela, K.

    The Norway rat is an indispensable model organism. Behavioral studies on rats usually concentrate on a single trait without considering how different behaviors are linked to each other and whether there are differences in this respect between rat strains or sexes. This study aims to describe the...

  20. Shyness-boldness predicts performance in working dogs

    Contributor(s):: Svartberg, K.

    This study investigates if there are relationships between personality and performance of dogs (Canis familiaris) in working dog trials. Data from 2655 dogs of the two breeds German Shepherd dog (GSD) and Belgian Tervuren (BT) in Sweden obtained between 1989 and 1997 were used. The breeds were...