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Author |
Lanier, J.L.; Grandin, T.; Green, R.D.; Avery, D.; McGee, K. |
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Title |
The relationship between reaction to sudden, intermittent movements and sounds and temperament |
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Journal Article |
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Year |
2000 |
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Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
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78 |
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6 |
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1467-1474 |
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N1 - |
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Equine Behaviour @ team @ |
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2945 |
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Author |
Bickerton, D. |
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Title |
Resolving Discontinuity: A Minimalist Distinction between Human and Non-human Minds |
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Journal Article |
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Year |
2000 |
Publication |
Integr. Comp. Biol. |
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Volume |
40 |
Issue |
6 |
Pages |
862-873 |
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Our genotype is so similar to those of the African apes, and our last common ancestor with them so recent, that it seems impossible that human and non-human cognition should differ qualitatively. But the outputs of human cognition are unique in their limitless creativity and adaptability. Exaption resolves the apparent paradox. Assume that the power to create symbols emerges from stimulus-stimulus linkages and is latent in many animals, and that the structural side of language emerges from the argument structures inherent in the social calculus associated with reciprocal altruism. These adaptations confer the potential for language. However, creating complex messages requires uniquely long-lasting coherence of neural signals, which depends in turn on the large quantities of neurons unique to Homo. The only difference between human and non-human minds is that we can sustain longer and more complex trains of thought. All else (emotions, rational processes, even consciousness) could be exactly the same. |
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10.1093/icb/40.6.862 |
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Equine Behaviour @ team @ |
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2966 |
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Author |
Emery, N.J. |
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Title |
The eyes have it: the neuroethology, function and evolution of social gaze |
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Journal Article |
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Year |
2000 |
Publication |
Neuroscience and Biobehavioral Reviews |
Abbreviated Journal |
Neurosci Biobehav Rev |
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Volume |
24 |
Issue |
6 |
Pages |
581-604 |
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Keywords |
Animals; *Eye; Fixation, Ocular; Humans; *Social Behavior |
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Gaze is an important component of social interaction. The function, evolution and neurobiology of gaze processing are therefore of interest to a number of researchers. This review discusses the evolutionary role of social gaze in vertebrates (focusing on primates), and a hypothesis that this role has changed substantially for primates compared to other animals. This change may have been driven by morphological changes to the face and eyes of primates, limitations in the facial anatomy of other vertebrates, changes in the ecology of the environment in which primates live, and a necessity to communicate information about the environment, emotional and mental states. The eyes represent different levels of signal value depending on the status, disposition and emotional state of the sender and receiver of such signals. There are regions in the monkey and human brain which contain neurons that respond selectively to faces, bodies and eye gaze. The ability to follow another individual's gaze direction is affected in individuals with autism and other psychopathological disorders, and after particular localized brain lesions. The hypothesis that gaze following is “hard-wired” in the brain, and may be localized within a circuit linking the superior temporal sulcus, amygdala and orbitofrontal cortex is discussed. |
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Center for Neuroscience, Department of Psychiatry & California Regional Primate Research Center, University of California, Davis, CA 95616, USA. njemery@ucdavis.edu |
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0149-7634 |
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PMID:10940436 |
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refbase @ user @ |
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3996 |
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Author |
Seyfarth, R.M.; Cheney, D.L. |
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Title |
Social Awareness in Monkeys |
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Journal Article |
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Year |
2000 |
Publication |
Amer. Zool. |
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40 |
Issue |
6 |
Pages |
902-909 |
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Abstract |
Tests of self-awareness in nonhuman primates have to date been concerned almost entirely with the recognition of an animal's reflection in a mirror. By contrast, we know much less about non-human primates' perception of their place within a social network, or of their understanding of themselves as individuals with unique sets of social relationships. Here we review evidence that monkeys who fail the mirror test may nonetheless behave as if they recognize themselves as distinct individuals, each of whom occupies a unique place in society and has a specific set of relations with others. A free-ranging vervet monkey, baboon, or macaque recognizes other members of his group as individuals. He also recognizes matrilineal kin groups, linear dominance rank orders, and behaves as if he recognizes his own unique place within them. This sense of “social self” in monkeys, however, is markedly different from self-awareness in humans. Although monkeys may behave in ways that accurately place themselves within a social network, they are unaware of the knowledge that allows them to do so: they do not know what they know, cannot reflect on what they know, and cannot become the object of their own attention. |
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10.1093/icb/40.6.902 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4934 |
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Author |
Fritz, J.; Bisenberger, A.; Kotrschal, K. |
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Title |
Stimulus enhancement in greylag geese: socially mediated learning of an operant task |
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Journal Article |
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Year |
2000 |
Publication |
Animal Behaviour |
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59 |
Issue |
6 |
Pages |
1119-1125 |
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We recently observed the spreading of a novel tradition in a flock of semiferal greylag geese, Anser anser: an increasing number of individuals began to bite and chew the stems of butterbur, Petasites hybridus. Because this behaviour spread particularly fast within families, social learning seemed to be involved. We therefore designed an experiment with hand-reared goslings, which were socially imprinted on humans, to investigate whether and how the observation of an experienced tutor affects the acquisition of a novel skill. Goslings had to open the gliding lid of a box to get at a food reward. To each of seven hand-reared observers a human tutor demonstrated where and how to open the lid, whereas seven controls remained untutored. All observers learned to perform the task but only one of the controls succeeded. The observers explored more often at the position shown by the tutor than elsewhere and seemingly learned by trial and error. In contrast, control birds explored primarily at positions that did not allow them to open the box. These results indicate that in greylag goslings the observation of an experienced model facilitates the learning of an operant task. We conclude that stimulus enhancement followed by operant conditioning were the mechanisms involved, which may have accounted for the fast spread of the stem-chewing tradition between family members. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5962 |
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Author |
de Waal, F.B.; Berger, M.L. |
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Title |
Payment for labour in monkeys |
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Journal Article |
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Year |
2000 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
404 |
Issue |
6778 |
Pages |
563 |
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Keywords |
Animals; Cebus/*physiology; *Cooperative Behavior; Evolution; *Feeding Behavior; Female; Male; Reward |
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Living Links, Yerkes Regional Primate Research Center, and Department of Psychology, Emory University, Atlanta, Georgia 30329, USA. dewaal@emory.edu |
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0028-0836 |
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PMID:10766228 |
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refbase @ user @ |
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190 |
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Author |
Foster, K.R.; Ratnieks, F.L.W. |
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Title |
Social insects: Facultative worker policing in a wasp |
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Journal Article |
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Year |
2000 |
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Nature |
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407 |
Issue |
6805 |
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692-693 |
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Kin-selection theory predicts that in social-insect colonies where the queen has mated multiple times, the workers will enforce cooperation by policing each other's reproduction1, 2, 3, 4. We have discovered a species, the wasp Dolichovespula saxonica, in which some queens mate once and others mate many times, and in which workers frequently attempt reproduction, allowing this prediction to be tested directly. We find that multiple mating by the queen leads to mutual policing by workers, whereas single mating does not. |
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Macmillan Magazines Ltd. |
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0028-0836 |
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10.1038/35037665 |
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Equine Behaviour @ team @ |
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4940 |
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Author |
Marc, M.; Parvizi, N.; Ellendorff, F.; Kallweit, E.; Elsaesser, F. |
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Title |
Plasma cortisol and ACTH concentrations in the warmblood horse in response to a standardized treadmill exercise test as physiological markers for evaluation of training status |
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Journal Article |
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Year |
2000 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
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78 |
Issue |
7 |
Pages |
1936-1946 |
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Adrenocorticotropic Hormone/*blood/diagnostic use; Animals; Catheterization/veterinary; Exercise Test; Horses/*blood; Hydrocortisone/*blood; Male; *Physical Conditioning, Animal |
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Reliable physiological markers for performance evaluation in sport horses are missing. To determine the diagnostic value of plasma ACTH and cortisol measurements in the warmblood horse, 10 initially 3-yr-old geldings of the Hannovarian breed were either exposed to a training schedule or served as controls. During experimental Phase 1, horses were group-housed, and half of the horses were trained for 20 wk on a high-speed treadmill. During Phase 2, groups were switched and one group was trained for 10 wk as during Phase 1, whereas the control group was confined to boxes. During Phase 3 horses were initially schooled for riding. Thereafter, all horses were regularly schooled for dressage and jumping, and half of the horses received an additional endurance training for 24 wk. During all phases horses were exposed at regular intervals to various standardized treadmill exercise tests. During and after the tests frequent blood samples were taken from an indwelling jugular catheter for determination of ACTH and cortisol. Treadmill exercise increased both hormones. Maximum ACTH concentrations were recorded at the end of exercise, and maximum cortisol levels were recorded 20 to 30 min later. Except for one test there were no differences in ACTH levels between trained horses and controls. There was no significant effect of training on the cortisol response (net increase) to treadmill exercise in any of the tests during Phase 1. During Phase 2 higher cortisol responses were recorded in controls than in trained horses (P < .05) after 10 wk of training (controls confined to boxes). During Phase 3 plasma cortisol responses were also higher in controls than in trained horses (P < .05 after 6, 18, and 24, P < or = .07 after 12 wk of training) when the inclination of the treadmill was 5%, but not at 3%. There was no overlap in net cortisol responses at 30 min between trained and untrained horses. An ACTH application after 24 wk of training resulted in higher cortisol responses in controls than in trained horses (P < or = .05), without any overlap between the groups at 30 min after ACTH. Plasma cortisol responses to either treadmill exercise or ACTH injection may be a reliable physiological marker for performance evaluation. Prerequisites are sufficient differences in training status and sufficient intensity of exercise test conditions. |
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Institute of Animal Science and Animal Behaviour, Federal Agricultural Research Center (FAL) Mariensee, Neustadt, Germany |
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0021-8812 |
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PMID:10907837 |
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Equine Behaviour @ team @ |
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3732 |
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Author |
Miller, R.M. |
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Title |
The revolution in horsemanship |
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Journal Article |
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Year |
2000 |
Publication |
Journal of the American Veterinary Medical Association |
Abbreviated Journal |
J Am Vet Med Assoc |
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Volume |
216 |
Issue |
8 |
Pages |
1232-1233 |
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*Animal Welfare; Animals; *Behavior, Animal; *Bonding, Human-Pet; *Horses/psychology; Humans; *Physical Conditioning, Animal |
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0003-1488 |
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PMID:10767957 |
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refbase @ user @ |
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1925 |
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Author |
Madigan, J.E.; Whittemore, J. |
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Title |
The role of the equine practitioner in disasters |
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Journal Article |
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Year |
2000 |
Publication |
Journal of the American Veterinary Medical Association |
Abbreviated Journal |
J Am Vet Med Assoc |
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216 |
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8 |
Pages |
1238-1239 |
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*Animal Husbandry/education; *Animal Welfare; Animals; Disaster Planning; *Horses; *Natural Disasters; United States; *Veterinary Medicine |
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Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis 95616, USA |
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0003-1488 |
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PMID:10767959 |
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Equine Behaviour @ team @ |
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4055 |
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