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  1. Individual hunting behaviour and prey specialisation in the house cat Felis catus: implications for conservation and management

    Contributor(s):: Dickman, C. R., Newsome, T. M.

    Predators are often classed as prey specialists if they eat a narrow range of prey types, or as generalists if they hunt multiple prey types. Yet, individual predators often exhibit sex, size, age or personality-related differences in their diets that may alter the impacts of predation on...

  2. Dietary fatty acid composition significantly influenced the proactive-reactive behaviour of Senegalese sole ( Solea senegalensis) post-larvae

    Contributor(s):: Ibarra-Zatarain, Z., Morais, S., Bonacic, K., Campoverde, C., Duncan, N.

    Few studies have examined the influence of diet on larval proactive-reactive behavioural dimension of stress coping style responses. The present study evaluated the influence of using different vegetables oils (Linseed; Soybean; Olive) and fish oil (Cod liver) for Artemia metanauplii nutritional...

  3. "Do not choose as I do!" - Dogs avoid the food that is indicated by another dog's gaze in a two-object choice task

    Contributor(s):: Balint, A., Farago, T., Meike, Z., Lenkei, R., Miklosi, A., Pongracz, P.

    Family dogs successfully follow human-given cues in a two-object choice test. However, whether this ability has any roots in dog-dog visual communication, has been seldom investigated. We designed a test where a video-projected, life-sized dog 'demonstrator' provided directional cues for the...

  4. Ontogeny of daily activity and circadian rhythm in the Iberian lynx ( Lynx pardinus)

    Contributor(s):: Yerga, J., Calzada, J., Manteca, X., Vargas, A., Perez, M. J., Palomares, F., Rivas, A.

    The aim of this paper is to describe the ontogeny of the circadian activity rhythms in captive-born Iberian lynx ( Lynx pardinus) from birth to subadult age and to verify if they develop a bimodal circadian pattern similar to the one they show in the wild. The amount of daily activity and the...

  5. A comparison of pet and purpose-bred research dog ( Canis familiaris) performance on human-guided object-choice tasks

    Contributor(s):: Lazarowski, L., Dorman, D. C.

    Several studies have shown that domestic dogs respond to human social cues such as pointing. Some experiments have shown that pet dogs outperformed wolves in following a momentary distal point. These findings have lent support to the hypothesis that domestication is responsible for domestic dogs'...

  6. Contagious yawning in domestic dog puppies ( Canis lupus familiaris): the effect of ontogeny and emotional closeness on low-level imitation in dogs

    Contributor(s):: Madsen, E. A., Persson, T.

    Contagious yawning is a well-documented phenomenon in humans and has recently attracted much attention from developmental and comparative sciences. The function, development and underlying mechanisms of the phenomenon, however, remain largely unclear. Contagious yawning has been demonstrated in...

  7. Developmental instability and light regime in chickens ( Gallus gallus )

    Contributor(s):: Moller, A. P., Sanotra, G. S., Vestergaard, K. S.

    Fluctuating asymmetry, a measure of developmental instability, was measured in 3 skeletal characters in chickens raised under 3 different lighting regimes: (A) a 16:8 light-dark cycle, (B) a changing light regime, and (C) permanent light. Chickens reared under permanent light developed 40% larger...

  8. Effects of feed- and water-based enrichment on activity and cannibalism in Muscovy ducklings

    | Contributor(s):: Riber, A. B., Mench, J. A.

    Cannibalism is a major problem for commercial production of Muscovy ducks (Cairina moschata). Surprisingly little is known about the ontogeny of cannibalism in ducks or how to reduce/prevent the problem in a welfare-friendly way. The preventative method typically used by the industry is...

  9. Stereotypies and compulsive behaviours - causes and possibilities of prevention

    | Contributor(s):: Kuhne, F.

    Despite the fact that livestock animals like companion pets have adapted through domestication to a life with human beings, they have the same demands on their environment as their feral conspecifics. Therefore, animal husbandry means keeping animals under conditions which are appropriate to the...

  10. Behaviour test for eight-week old puppies - heritabilities of tested behaviour traits and its correspondence to later behaviour

    | Contributor(s):: Wilsson, E., Sundgren, P. E.

    Play and exploratory behaviour, and behaviour when isolated (total of 10 tests) was tested in 630 German Shepherd puppies at 8 weeks of age. All dogs were also tested at 450-600 days of age using to regimen for selection of service dogs. Significant sex differences were found in 4 of the 10 puppy...

  11. Effect of cage size on the ontogeny of stereotyped behaviour in gerbils

    | Contributor(s):: Wiedenmayer, C.

  12. Effect of feed and environmental enrichment on development of stereotypic wire-gnawing in laboratory mice

    | Contributor(s):: Wurbel, H., Chapman, R., Rutland, C.

    At 21 days of age, 16 pairs of male ICR laboratory mice were weaned and allocated to 4 treatment groups in a 2 x 2 factorial design matched for genetic background (litter) and body weight. Factor one was the hardness of feed pellets with a significant 2.5-fold difference between soft and hard...

  13. Ontogeny of social awareness in domestic herbivores

    | Contributor(s):: Veissier, I., Biossy, A., Nowak, R., Orgeur, P., Poindron, P.

  14. Exposure to video images between 3 and 5 weeks of age decreases neophobia in domestic dogs

    | Contributor(s):: Pluijmakers, J. J. T. M., Appleby, D. L., Bradshaw, J. W. S.

    Restricted experience in early life is known to contribute to long-lasting predispositions to fear and anxiety in mammals. It is commonplace for young domestic dogs not to experience many features of the environment in which they will spend their adult lives until after 8 weeks of age:...

  15. 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...

  16. Play behaviour during early ontogeny in free-ranging dogs ( Canis familiaris )

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

    Twenty-four free-ranging dog puppies belonging to six litters were observed from birth to 13 weeks of age to study the play behaviour in early ontogeny. Only a single annual breeding cycle with synchronized breeding season was recorded in this study. Mean litter size was 6.67 ranging from 5 to 8...

  17. The effect of early exposure to the opposite sex on mate choice in White Leghorn chickens

    | Contributor(s):: Leonard, M. L., Zanette, L., Clinchy, M.

    1000 female and 148 male Leghorn fowls were reared in all-female (140/pen), all-male (50/pen) or mixed pens (12 males and 140 females/pen). Males and females reared in mixed pens were separated at 18 weeks of age to prevent them from gaining adult sexual experience. Mate choice trials were...

  18. Why in earth? Dustbathing behaviour in jungle and domestic fowl reviewed from a Tinbergian and animal welfare perspective

    | Contributor(s):: Olsson, I. A. S., Keeling, L. J.

    Dustbathing has been the subject of much research in captive birds. In the present review we bring together the studies of domestic fowl (Gallus gallus domesticus) and jungle fowl (G. gallus) to provide a more complete picture of the behaviour. Dustbathing is discussed from the four aspects...

  19. Ontogeny of response to humans in handled and non-handled female domestic chicks

    | Contributor(s):: Jones, R. B.

    The present study compared the responses of handled and non-handled female chicks to a visible experimenter at 1 of 5 ages (2, 3, 4, 6 or 9 days). Fear of humans was functionally measured in terms of the chicks' approach/avoidance tendencies towards a visible experimenter. Handling, which...

  20. Tonic immobility and open field responses in domestic fowl chicks during the first week of life

    | Contributor(s):: Heiblum, R., Aizenstein, O., Gvaryahu, G., Voet, H., Robinzon, B., Snapir, N.

    The tonic immobility (TI) response of naive White-Leghorn male chicks was tested at the age of 1, 2, 3, 5 and 7 days (5-9 chicks per group). TI was induced dorsally and its duration, the number of induction trials and the latency of peeping were recorded. The TI response was strongly affected by...