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Ronald J. Schusterman; Colleen J. Reichmuth; David Kastak |
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How Animals Classify Friends and Foes |
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2000 |
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Current Directions in Psychological Science |
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Curr. Dir. Psychol. Sci. |
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9 |
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1-6 |
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3477 |
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Guth S.; Guth W. |
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Title |
Morality based on cognition in primates |
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2000 |
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Journal of Consciousness Studies |
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7 |
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43-46 |
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3478 |
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Buchner, H.H.F.; Obermuller, S.; Scheidl, M. |
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Title |
Body Centre of Mass Movement in the Sound Horse |
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2000 |
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The Veterinary Journal |
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160 |
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3 |
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225-234 |
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Horse; centre of mass; kinematics; segment model; locomotion. |
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The body centre of mass (BCM) is a key factor in the analysis of equine locomotion, as its position and movement determines the distribution and magnitude of loads on the limbs. In this study, the three-dimensional (3D) movement of the BCM in walking and trotting horses was assessed using a kinematic, segmental method. Thirty markers representing 20 body segments were recorded in 12 sound horses while standing, walking and trotting on a treadmill using a high-speed video system. Based on segmental inertial data, 3D positions of the segmental centres of mass as well as the total BCM were calculated. The position within the trunk during square standing and the movements of the BCM were determined for the three planes. The position of the BCM in the standing horse is presented relative to external reference points. At the trot, vertical displacement amplitude of the BCM amounted to 53 (6) mm as mean (sd), which was 27% smaller than external trunk movement. Medio-lateral displacement amplitude of the BCM was 19 (4) mm, 34% less than trunk amplitude. Sagittal forward-backward oscillations of the BCM independent from general forward movement were 13 (3) mm, being 24% less than trunk movements. At the walk, vertical, medio-lateral and sagittal BCM movements were smaller than trunk movements by 43, 65 and 65% respectively. The results show reduced and efficient BCM movements compared to the trunk and form a basis for the assessment of various clinical conditions such as lameness, the influence of a rider and various dressage performances. |
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3959 |
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Mohr, E.; Witte, E.; Voss, B. |
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Heart rate variability as stress indicator |
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2000 |
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Archiv fur Tierzucht |
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43 |
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3 Spec. Iss. |
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171-176 |
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Cited By (since 1996): 2; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4534 |
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Riede, T.; Herzel, H.; Mehwald, D.; Seidner, W.; Trumler, E.; Böhme, G. |
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Nonlinear phenomena in the natural howling of a dog-wolf mix |
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2000 |
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J Acoust Soc Am |
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108 |
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Equine Behaviour @ team @ Riede2000 |
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6484 |
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Nicol, C.J |
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Equine Stereotypies. In: Houpt K.A. (Ed.), |
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2000 |
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Recent Advances in Companion Animal Behavior Problems |
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International Veterinary Information Service |
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refbase @ user @ |
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477 |
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Author |
P. K. McGregor,; T. M. Peake, |
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Title |
Communication networks: social environments for receiving and signalling behaviour |
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2000 |
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Acta ethologica |
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Acta. Ethol. |
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2 |
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2 |
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71-81 |
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Communication ? Network ? Eavesdropping ? Audiences ? Information |
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Communication and social behaviour are inextricably linked, with communication mediating important social behaviours such as resource defence and mate attraction. However, the social environment in which communication occurs is often ignored in discussions of communication behaviour. We argue that networks of several individuals are the common social environment for communication behaviour. The consequences for receivers and signallers of communicating in a network environment are the main subjects of this review. Eavesdropping is a receiving behaviour that is only possible in the environment of a network and therefore we concentrate on this behaviour. The main effect of communication networks on signallers is to create competition with other signallers for receiver attention. We discuss the consequences of such competition. To conclude, we explore the role of signals and signalling interactions as sources of information that animals exploit to direct their behaviour. |
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496 |
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WAYNE L. LINKLATER & ELISSA Z. CAMERON |
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Distinguishing cooperation from cohabitation: the feral horse case |
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2000 |
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Animal Behaviour. |
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Anim. Behav. |
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59 |
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F17-F21 |
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514 |
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Author |
Aureli, Filippo; de Waal, F. B. M. |
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Title |
Natural conflict resolution |
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2000 |
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University of California Press |
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University of California Press. |
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Introduction FILIPPO AURELI & FRANS B. M. DE WAAL Menzel, C. R. 1993. van Schaik, C. P., & van Noordwijk, M. A. 1986. Communication by agonistic displays: What can games theory contribute to ethology? Chapais, B. 1995. Alliances as a means of competition in primates: Evolutionary, developmental, and cognitive aspects. Punishment in animal societies. Nature, 373: 209-216. |
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Berkley |
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533 |
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Goncalves, D.M.; Oliveira, R.F.; Korner, K.; Poschadel, J.R.; Schlupp, I. |
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Using video playbacks to study visual communication in a marine fish, Salaria pavo |
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2000 |
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Animal Behaviour. |
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Anim. Behav. |
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60 |
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3 |
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351-357 |
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Video playbacks have been successfully applied to the study of visual communication in several groups of animals. However, this technique is controversial as video monitors are designed with the human visual system in mind. Differences between the visual capabilities of humans and other animals will lead to perceptually different interpretations of video images. We simultaneously presented males and females of the peacock blenny, Salaria pavo, with a live conspecific male and an online video image of the same individual. Video images failed to elicit appropriate responses. Males were aggressive towards the live male but not towards video images of the same male. Similarly, females courted only the live male and spent more time near this stimulus. In contrast, females of the gynogenetic poecilid Poecilia formosa showed an equal preference for a live and video image of a P. mexicana male, suggesting a response to live animals as strong as to video images. We discuss differences between the species that may explain their opposite reaction to video images. |
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refbase @ user @ |
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541 |
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