You are here: Home / Tags / Foxes / All Categories

Tags: Foxes

All Categories (61-80 of 92)

  1. Comparison of daytime use between platform types, materials, ceilings and experiences in juvenile blue foxes ( Alopex lagopus )

    Contributor(s):: Korhonen, H., Ketoja, E., Niemela, P.

    264 juvenile blue foxes were housed in cages with side-U platforms or corner flat platforms made from wood or net with ceilings 23 or 30 cm above. The foxes were the offspring of females housed in cages without or with platforms. Platform type significantly affected the amount of time the foxes...

  2. Evaluation of the 'maximum price paid' as an index of motivational strength for farmed silver foxes ( Vulpes vulpes )

    Contributor(s):: Hovland, A. L., Mason, G., Boe, K. E., Steinheim, G., Bakken, M.

    To measure farmed foxes' motivations for full, naturalistic social contact, we constructed an apparatus where they could perform an operant to access stimuli, but then leave freely and thence determine their own bout lengths. Motivational measures based on demand curves can be invalid in such...

  3. Factor analysis of behavioural tests in farmed silver and blue foxes

    Contributor(s):: Harri, M., Rekila, T., Mononen, J.

    The behaviour of farmed silver and blue foxes in the open-field were recorded and analysed with a computer-based system. In addition, the reaction towards humans and the capture time were recorded for animals in their home cage. Factor analysis with VARIMAX rotation produced four independent...

  4. Group housing of adult silver fox ( Vulpes vulpes ) vixens in autumn: agonistic behaviour during the first days subsequent to mixing

    Contributor(s):: Hovland, A. L., Akre, A. K., Bakken, M.

    Due to farmed foxes' (Vulpes vulpes) social flexibility and possible motivation for intraspecific contact, group housing may act as an alternative housing procedure. Because initial social contact between silver foxes usually involves agonistic displays as a part of foxes' social dominance...

  5. Responses of farmed silver foxes ( Vulpes vulpes ) to excessive food availability: implications for using food as a yardstick resource in motivation tests

    Contributor(s):: Hovland, A. L., Mason, G., Ahlstrom, O., Bakken, M.

    Food is frequently used as a 'yardstick' in operant experiments. However, previous work on silver foxes had suggested that how food is presented can affect how they respond to it, with excess food leading to variable consumption rates, and cages containing food being avoided over control cages...

  6. Seasonal changes in platform use by farmed blue foxes ( Alopex lagopus )

    Contributor(s):: Korhonen, H., Niemela, P., Tuuri, H.

    Seasonal changes in platform use were investigated in farm-raised blue foxes (Alopex lagopus) by daytime scan sampling observations and 24-h video recordings. Seasonal comparisons were made in both sexes, but other experimental treatments were applied mainly to females. Platform use was minimal...

  7. Stress and nest-boxes in farmed fox

    Contributor(s):: Jeppesen, L. L.

  8. The nature and strength of social motivations in young farmed silver fox vixens ( Vulpes vulpes )

    Contributor(s):: Hovland, A. L., Mason, G. J., Kirkden, R. D., Bakken, M.

    To investigate the strength of social motivation and the motives underlying social contact in farmed silver foxes (Vulpes vulpes), we housed six young vixens continuously in a closed economy operant apparatus and measured their 'maximum price paid' when required to perform a task to obtain...

  9. Abnormal behaviour in farmed silver fox vixens (Vulpes vulpes L.): tail-biting and infanticide

    Contributor(s):: Braastad, B. O.

  10. Do different competition strategies affect social preference and behaviour in silver fox vixens ( Vulpes vulpes )?

    Contributor(s):: Akre, A. K., Hovland, A. L., Bakken, M.

    Among mammals, social ranking is generally thought to affect the outcome of disputes over preferred, limited or future resources. Therefore, we should expect individuals' preference for conspecifics to be affected by their own and other individuals' competition capacity. Here, we investigated the...

  11. Effects of prenatal handling stress on adrenal weight and function and behaviour in novel situations in blue fox cubs ( Alopex lagopus )

    Contributor(s):: Braastad, B. O., Osadchuk, L. V., Lund, G., Bakken, M.

    This study investigated the effects of a 1-min daily handling stress given to farmed blue fox females in the last third of gestation on adrenal weight and function in male and female offspring and on behaviour in novel situations. In 10-day-old cubs (n=68), records were made of serum...

  12. Learned food aversion with and without an odour cue for protecting untreated baits from wild mammal foraging. (Special Issue: Conservation, enrichment and animal behavior.)

    Contributor(s):: Baker, S. E., Johnson, P. J., Slater, D., Watkins, R. W., Macdonald, D. W.

    Lethal methods of controlling wildlife foraging damage may present difficulties regarding conservation, ethics, welfare, and efficacy, providing an imperative to develop non-lethal alternatives. Learned food aversions offer a benign, targeted alternative to culling. However, food aversions are...

  13. Maternal infanticide and periparturient behaviour in farmed silver foxes Vulpes vulpes

    Contributor(s):: Braastad, B. O., Bakken, M.

    Reproduction and periparturient behaviour were studied in 21 litters of primiparous and 18 litters of multiparous vixens by video-recording inside the breeding box. Of 54 dead cubs, 41 had been bitten and probably killed. The probability that a cub of a primiparous mother would be killed was 37%...

  14. Periparturient behaviour of successfully reproducing farmed silver-fox vixens

    Contributor(s):: Braastad, B. O.

    The behaviour of 19 vixens (8 primiparous, 11 multiparous) kept under traditional management conditions, was video-recorded inside the breeding box day and night, and analysed in 4 phases from 24 h before delivery to 72 h after. Births were distributed uniformly around the clock. True litter size...

  15. The effect of an improved man-animal relationship on sex ratio in litters and on growth and behaviour in cubs among farmed silver fox ( Vulpes vulpes )

    Contributor(s):: Bakken, M.

    Sex ratio and cub growth and behaviour were examined in 28 litters from multiparous silver fox vixens that had been given a titbit twice a week during pregnancy (G1) or received the same amount of human contact without any titbit (G2). Cub activity (number of grid lines crossed [Lc] during 3 min)...

  16. The effects of resource distribution on behaviour in pair housed silver fox vixens ( Vulpes vulpes ) subsequent to mixing

    Contributor(s):: Akre, A. K., Hovland, A. L., Bakken, M.

    In nature, the way essential resources are distributed is recognized as a potentially important factor influencing the frequency of aggressive interactions between animals. This knowledge is rarely taken into consideration when designing housing environments for social groups of farm animals....

  17. Anxiolytic drugs inhibit hyperthermia induced by handling in farmed silver foxes ( Vulpes vulpes )

    Contributor(s):: Moe, R. O., Bakken, M.

    Eighteen silver fox vixens were divided into 3 equal groups and injected i.m with either diazepam (5 mg/kg) or buspirone (10 mg/kg), or sterile saline (control). Foxes were handled before and at 90 min after injection. Rectal temperature (Trec) was measured as an indicator of stress-induced...

  18. Behaviour of silver foxes in traditional breeding boxes and in boxes with an entrance tunnel

    Contributor(s):: Braastad, B. O.

    The periparturient behaviour of silver-fox females inside traditional and modified breeding boxes was recorded on video tape from 24 h before to 72 h after parturition for 3 diurnal periods. 20 litters had the traditional simple breeding box, 14 litters had a box with a narrow entrance tunnel....

  19. Behavioural and physiological differences between silver foxes selected and not selected for domestic behaviour

    Contributor(s):: Harri, M., Mononen, J., Ahola, L., Plyusnina, I., Rekila, T.

    The degree of domestication of an animal is difficult to estimate because the animal's phenotype depends not only on its genetic make-up but also on its experiences during ontogeny. In addition, comparisons between wild and domestic animals suffer from the lack of a proper reference population....

  20. Enrichment value of wooden blocks for farmed blue foxes ( Alopex lagopus )

    Contributor(s):: Korhonen, H., Niemela, P.

    Wooden blocks (30x7 cm) were employed to clarify how such inanimate objects might serve to enrich the barren wire-mesh cages. In experiment 1, behavioural reactions of 8 male blue foxes to wooden blocks were videotaped between January and May. In experiment 2, 16 male blue foxes were housed...