| Records |
| Author |
Gonyou, H.W. |
| Title |
Why the study of animal behavior is associated with the animal welfare issue |
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Journal Article |
| Year |
1994 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
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72 |
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8 |
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2171-2177 |
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Equine Behaviour @ team @ |
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2931 |
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| Author |
Houpt Ka, H.T. |
| Title |
Social and illumination preferences of mares |
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Journal Article |
| Year |
1988 |
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J Anim Sci |
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66 |
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2159-2164 |
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from Professor Hans Klingels Equine Reference List |
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1201 |
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Ginther, O.J.; Lara, A.; Leoni, M.; Bergfelt, D.R. |
| Title |
Herding and snaking by the harem stallion in domestic herds |
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Journal Article |
| Year |
2002 |
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Theriogenology |
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57 |
Issue |
8 |
Pages |
2139-2146 |
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Cited By (since 1996): 1; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4516 |
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| Author |
Biro, D.; Sumpter, D.J.T.; Meade, J.; Guilford, T. |
| Title |
From Compromise to Leadership in Pigeon Homing |
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Journal Article |
| Year |
2006 |
Publication |
Current Biology |
Abbreviated Journal |
Curr Biol |
| Volume |
16 |
Issue |
21 |
Pages |
2123-2128 |
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Animal Migration; Animals; Columbidae/*physiology; Decision Making; *Flight, Animal; *Homing Behavior; Models, Biological; Orientation; *Social Behavior; *Social Dominance |
| Abstract |
Summary A central problem faced by animals traveling in groups is how navigational decisions by group members are integrated, especially when members cannot assess which individuals are best informed or have conflicting information or interests , , , and . Pigeons are now known to recapitulate faithfully their individually distinct habitual routes home , and , and this provides a novel paradigm for investigating collective decisions during flight under varying levels of interindividual conflict. Using high-precision GPS tracking of pairs of pigeons, we found that if conflict between two birds' directional preferences was small, individuals averaged their routes, whereas if conflict rose over a critical threshold, either the pair split or one of the birds became the leader. Modeling such paired decision-making showed that both outcomes--compromise and leadership--could emerge from the same set of simple behavioral rules. Pairs also navigated more efficiently than did the individuals of which they were composed, even though leadership was not necessarily assumed by the more efficient bird. In the context of mass migration of birds and other animals, our results imply that simple self-organizing rules can produce behaviors that improve accuracy in decision-making and thus benefit individuals traveling in groups , and . |
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Department of Zoology, University of Oxford, Oxford OX1 3PS, United Kingdom. daro.biro@zoo.ox.ac.uk |
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Englisch |
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0960-9822 |
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PMID:17084696 |
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2026 |
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| Author |
Tan, H.; Wilson, A.M. |
| Title |
Grip and limb force limits to turning performance in competition horses |
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Journal Article |
| Year |
2011 |
Publication |
Proceedings of the Royal Society B: Biological Sciences |
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278 |
Issue |
1715 |
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2105-2111 |
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Manoeuverability is a key requirement for successful terrestrial locomotion, especially on variable terrain, and is a deciding factor in predator–prey interaction. Compared with straight-line running, bend running requires additional leg force to generate centripetal acceleration. In humans, this results in a reduction in maximum speed during bend running and a published model assuming maximum limb force as a constraint accurately predicts how much a sprinter must slow down on a bend given his maximum straight-line speed. In contrast, greyhounds do not slow down or change stride parameters during bend running, which suggests that their limbs can apply the additional force for this manoeuvre. We collected horizontal speed and angular velocity of heading of horses while they turned in different scenarios during competitive polo and horse racing. The data were used to evaluate the limits of turning performance. During high-speed turns of large radius horizontal speed was lower on the bend, as would be predicted from a model assuming a limb force limit to running speed. During small radius turns the angular velocity of heading decreased with increasing speed in a manner consistent with the coefficient of friction of the hoof–surface interaction setting the limit to centripetal force to avoid slipping. |
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10.1098/rspb.2010.2395 |
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Equine Behaviour @ team @ |
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5701 |
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da Costa, A.P.; Leigh, A.E.; Man, M.-S.; Kendrick, K.M. |
| Title |
Face pictures reduce behavioural, autonomic, endocrine and neural indices of stress and fear in sheep |
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Journal Article |
| Year |
2004 |
Publication |
Proceedings of the Royal Society of London. Series B: Biological Sciences |
Abbreviated Journal |
Proc. R. Soc. Lond. B. |
| Volume |
271 |
Issue |
1552 |
Pages |
2077-2084 |
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Faces are highly emotive stimuli and we find smiling or familiar faces both attractive and comforting, even as young babies. Do other species with sophisticated face recognition skills, such as sheep, also respond to the emotional significance of familiar faces? We report that when sheep experience social isolation, the sight of familiar sheep face pictures compared with those of goats or inverted triangles significantly reduces behavioural (activity and protest vocalizations), autonomic (heart rate) and endocrine (cortisol and adrenaline) indices of stress. They also increase mRNA expression of activity–dependent genes (c–fos and zif/268) in brain regions specialized for processing faces (temporal and medial frontal cortices and basolateral amygdala) and for emotional control (orbitofrontal and cingulate cortex), and reduce their expression in regions associated with stress responses (hypothalamic paraventricular nucleus) and fear (central and lateral amygdala). Effects on face recognition, emotional control and fear centres are restricted to the right brain hemisphere. Results provide evidence that face pictures may be useful for relieving stress caused by unavoidable social isolation in sheep, and possibly other animal species, including humans. The finding that sheep, like humans, appear to have a right brain hemisphere involvement in the control of negative emotional experiences also suggests that functional lateralization of brain emotion systems may be a general feature in mammals. |
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no |
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Equine Behaviour @ team @ |
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5354 |
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Pennisi, E. |
| Title |
Are out primate cousins 'conscious'? |
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1999 |
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Science (New York, N.Y.) |
Abbreviated Journal |
Science |
| Volume |
284 |
Issue |
5423 |
Pages |
2073-2076 |
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Animals; *Behavior, Animal; Cebus; *Consciousness; Empathy; Humans; Instinct; Intelligence; Learning; *Mental Processes; Pan troglodytes; *Primates |
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English |
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0036-8075 |
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PMID:10409060 |
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no |
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Equine Behaviour @ team @ |
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2843 |
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Davis, S.L.; Cheeke, P.R. |
| Title |
Do domestic animals have minds and the ability to think? A provisional sample of opinions on the question |
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Journal Article |
| Year |
1998 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
| Volume |
76 |
Issue |
8 |
Pages |
2072-2079 |
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Equine Behaviour @ team @ |
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2930 |
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Brennan, P.A.; Kendrick, K.M. |
| Title |
Mammalian social odours: attraction and individual recognition |
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Journal Article |
| Year |
2006 |
Publication |
Philosophical Transactions of the Royal Society B: Biological Sciences |
Abbreviated Journal |
Phil. Trans. Biol. Sci. |
| Volume |
361 |
Issue |
1476 |
Pages |
2061-2078 |
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amygdala, maternal bonding, olfactory bulb, pregnancy block, social recognition, vomeronasal |
| Abstract |
Mammalian social systems rely on signals passed between individuals conveying information including sex, reproductive status, individual identity, ownership, competitive ability and health status. Many of these signals take the form of complex mixtures of molecules sensed by chemosensory systems and have important influences on a variety of behaviours that are vital for reproductive success, such as parent-offspring attachment, mate choice and territorial marking. This article aims to review the nature of these chemosensory cues and the neural pathways mediating their physiological and behavioural effects. Despite the complexities of mammalian societies, there are instances where single molecules can act as classical pheromones attracting interest and approach behaviour. Chemosignals with relatively high volatility can be used to signal at a distance and are sensed by the main olfactory system. Most mammals also possess a vomeronasal system, which is specialized to detect relatively non-volatile chemosensory cues following direct contact. Single attractant molecules are sensed by highly specific receptors using a labelled line pathway. These act alongside more complex mixtures of signals that are required to signal individual identity. There are multiple sources of such individuality chemosignals, based on the highly polymorphic genes of the major histocompatibility complex (MHC) or lipocalins such as the mouse major urinary proteins. The individual profile of volatile components that make up an individual odour signature can be sensed by the main olfactory system, as the pattern of activity across an array of broadly tuned receptor types. In addition, the vomeronasal system can respond highly selectively to non-volatile peptide ligands associated with the MHC, acting at the V2r class of vomeronasal receptor.The ability to recognize individuals or their genetic relatedness plays an important role in mammalian social behaviour. Thus robust systems for olfactory learning and recognition of chemosensory individuality have evolved, often associated with major life events, such as mating, parturition or neonatal development. These forms of learning share common features, such as increased noradrenaline evoked by somatosensory stimulation, which results in neural changes at the level of the olfactory bulb. In the main olfactory bulb, these changes are likely to refine the pattern of activity in response to the learned odour, enhancing its discrimination from those of similar odours. In the accessory olfactory bulb, memory formation is hypothesized to involve a selective inhibition, which disrupts the transmission of the learned chemosignal from the mating male. Information from the main olfactory and vomeronasal systems is integrated at the level of the corticomedial amygdala, which forms the most important pathway by which social odours mediate their behavioural and physiological effects. Recent evidence suggests that this region may also play an important role in the learning and recognition of social chemosignals. |
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Equine Behaviour @ team @ |
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4334 |
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Dickens, M.J.; Delehanty, D.J.; Romero, L.M. |
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Stress and translocation: alterations in the stress physiology of translocated birds |
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Journal Article |
| Year |
2009 |
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Proceedings of the Royal Society B: Biological Sciences |
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276 |
Issue |
1664 |
Pages |
2051-2056 |
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Translocation and reintroduction have become major conservation actions in attempts to create self-sustaining wild populations of threatened species. However, avian translocations have a high failure rate and causes for failure are poorly understood. While ‘stress’ is often cited as an important factor in translocation failure, empirical evidence of physiological stress is lacking. Here we show that experimental translocation leads to changes in the physiological stress response in chukar partridge, Alectoris chukar. We found that capture alone significantly decreased the acute glucocorticoid (corticosterone, CORT) response, but adding exposure to captivity and transport further altered the stress response axis (the hypothalamic–pituitary–adrenal axis) as evident from a decreased sensitivity of the negative feedback system. Animals that were exposed to the entire translocation procedure, in addition to the reduced acute stress response and disrupted negative feedback, had significantly lower baseline CORT concentrations and significantly reduced body weight. These data indicate that translocation alters stress physiology and that chronic stress is potentially a major factor in translocation failure. Under current practices, the restoration of threatened species through translocation may unwittingly depend on the success of chronically stressed individuals. This conclusion emphasizes the need for understanding and alleviating translocation-induced chronic stress in order to use most effectively this important conservation tool. |
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Equine Behaviour @ team @ |
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5582 |
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