| Records |
| Author |
Herbert Gintis; Samuel Bowles; Robert Boyd; Ernst Fehr |
| Title |
Explaining altruistic behavior in humans |
Type |
Journal Article |
| Year |
2003 |
Publication |
Evolution and Human Behaviour |
Abbreviated Journal |
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Volume  |
24 |
Issue |
3 |
Pages |
153-172 |
| Keywords |
Altruism; Reciprocity; Experimental games; Evolution of cooperation |
| Abstract |
Recent experimental research has revealed forms of human behavior involving interaction among unrelated individuals that have proven difficult to explain in terms of kin or reciprocal altruism. One such trait, strong reciprocity is a predisposition to cooperate with others and to punish those who violate the norms of cooperation, at personal cost, even when it is implausible to expect that these costs will be repaid. We present evidence supporting strong reciprocity as a schema for predicting and understanding altruism in humans. We show that under conditions plausibly characteristic of the early stages of human evolution, a small number of strong reciprocators could invade a population of self-regarding types, and strong reciprocity is an evolutionary stable strategy. Although most of the evidence we report is based on behavioral experiments, the same behaviors are regularly described in everyday life, for example, in wage setting by firms, tax compliance, and cooperation in the protection of local environmental public goods. |
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1090-5138 |
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no |
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Equine Behaviour @ team @ S1090-5138(02)00157-5 |
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4943 |
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| Author |
Wilson, D.A.; Stevenson, R.J. |
| Title |
The fundamental role of memory in olfactory perception |
Type |
Journal Article |
| Year |
2003 |
Publication |
Trends in Neurosciences |
Abbreviated Journal |
Trends. Neurosci. |
| Volume |
26 |
Issue |
5 |
Pages |
243-247 |
| Keywords |
olfactory perception mammals |
| Abstract |
Current emphasis on odorant physiochemical features as the basis for perception largely ignores the synthetic and experience-dependent nature of olfaction. Olfaction is synthetic, as mammals have only limited ability to identify elements within even simple odor mixtures. Furthermore, olfaction is experience-bound, as exposure alone can significantly affect the extent to which stimuli can be discriminated. We propose that early analytical processing of odors is inaccessible at the behavioral level and that all odors are initially encoded as `objects' in the piriform cortex. Moreover, we suggest that odor perception is wholly dependent on the integrity of this memory system and that its loss severely impairs normal perception. |
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no |
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refbase @ user @ |
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795 |
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| Author |
Branchi, I.; Bichler, Z.; Berger-Sweeney, J.; Ricceri, L. |
| Title |
Animal models of mental retardation: from gene to cognitive function |
Type |
Journal Article |
| Year |
2003 |
Publication |
Neuroscience and Biobehavioral Reviews |
Abbreviated Journal |
Neurosci Biobehav Rev |
| Volume |
27 |
Issue |
1-2 |
Pages |
141-153 |
| Keywords |
Animals; Animals, Genetically Modified/growth & development; Behavior/physiology; Behavior, Animal; Brain/*growth & development; Cognition/*physiology; *Disease Models, Animal; Environment; Genes; Genetic Diseases, Inborn/physiopathology; Humans; Mental Retardation/classification/*genetics/*physiopathology |
| Abstract |
About 2-3% of all children are affected by mental retardation, and genetic conditions rank among the leading causes of mental retardation. Alterations in the information encoded by genes that regulate critical steps of brain development can disrupt the normal course of development, and have profound consequences on mental processes. Genetically modified mouse models have helped to elucidate the contribution of specific gene alterations and gene-environment interactions to the phenotype of several forms of mental retardation. Mouse models of several neurodevelopmental pathologies, such as Down and Rett syndromes and X-linked forms of mental retardation, have been developed. Because behavior is the ultimate output of brain, behavioral phenotyping of these models provides functional information that may not be detectable using molecular, cellular or histological evaluations. In particular, the study of ontogeny of behavior is recommended in mouse models of disorders having a developmental onset. Identifying the role of specific genes in neuropathologies provides a framework in which to understand key stages of human brain development, and provides a target for potential therapeutic intervention. |
| Address |
Section of Behavioural Pathophysiology, Laboratorio di Fisiopatologia di Organo e di Sistema, Istituto Superiore di Sanita, Viale Regina Elena 299, 00161 Roma, Italy. branchi@iss.it |
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English |
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0149-7634 |
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PMID:12732230 |
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no |
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Equine Behaviour @ team @ |
Serial |
2805 |
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| Author |
Fazio, F.; Assenza, A.; Piccione, G.; Caola, G. |
| Title |
Periodic Monitoring of Some Physiological Parameters during Training in the Athletic Horse |
Type |
Journal Article |
| Year |
2003 |
Publication |
Veterinary Research Communications |
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| Volume |
27 |
Issue |
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Pages |
595-598 |
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no |
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Equine Behaviour @ team @ |
Serial |
4384 |
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| Author |
Fazio, E.; Ferlazzo, A. |
| Title |
Evaluation of Stress During Transport |
Type |
Journal Article |
| Year |
2003 |
Publication |
Veterinary Research Communications |
Abbreviated Journal |
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27 |
Issue |
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Pages |
519-524 |
| Keywords |
hormones – physiological variables – stress – transport procedures |
| Abstract |
Domestic animals are transported for a variety of reasons including breeding, biomedical purposes, slaughter and, in the case of sporting horses, for competitions, pleasure activities or ceremonial proceedings. Studies to determine the amount of stress on farm animals during transport often have highly variable results and are difficult to interpret. The reaction of animals to stressors depends on the duration and intensity of the stressors, the animal's previous experience, its physiological status and the immediate environmental restraints. Behavioural, haematological, haematochemical, physiological and neuro-hormonal (ß-endorphin, ACTH, cortisol, iodothyronines) variables are discussed on the basis of handling, loading and transport procedures of animals. |
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Equine Behaviour @ team @ |
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4391 |
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| Author |
Milgram, N.W. |
| Title |
Cognitive Experience and Its Effect on Age-Dependent Cognitive Decline in Beagle Dogs |
Type |
Journal Article |
| Year |
2003 |
Publication |
Neurochemical Research |
Abbreviated Journal |
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| Volume |
28 |
Issue |
11 |
Pages |
1677-1682 |
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| Abstract |
Test-sophisticated beagle dogs show marked age sensitivity in a size discrimination learning task, with old and senior dogs performing significantly more poorly than young dogs. By contrast, age differences in learning were not seen in dogs naive with respect to neuropsychological test experience. These results indicate that old animals benefit less from prior cognitive experience than young animals, which is an example of an age-dependent loss in plasticity. This finding also suggests that behaviorally experienced animals are a more useful model of human cognitive aging than behaviorally naive animals. We also looked at the effect of a program of behavioral enrichment in aged dogs. One year of enrichment did not lead to significant differences, but after 2 years the behaviorally enriched group performed significantly better than the control group. The effect after 2 years indicates that a prolonged program of cognitive enrichment can serve as an effective intervention in aged dogs. These findings demonstrate that cognitive abilities in aged animals can be modified by providing behavioral experience, indicating that cognitive abilities remain moderately plastic, even in very old animals. |
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no |
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Equine Behaviour @ team @ |
Serial |
3151 |
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| Author |
Gibson, B.M.; Shettleworth, S.J. |
| Title |
Competition among spatial cues in a naturalistic food-carrying task |
Type |
Journal Article |
| Year |
2003 |
Publication |
Learning & behavior : a Psychonomic Society publication |
Abbreviated Journal |
Learn Behav |
| Volume |
31 |
Issue |
2 |
Pages |
143-159 |
| Keywords |
Adaptation, Psychological; Animals; Appetitive Behavior; *Association Learning; *Attention; Choice Behavior; *Cues; *Discrimination Learning; Male; Rats; Rats, Long-Evans; Space Perception; *Spatial Behavior |
| Abstract |
Rats collected nuts from a container in a large arena in four experiments testing how learning about a beacon or cue at a goal interacts with learning about other spatial cues (place learning). Place learning was quick, with little evidence of competition from the beacon (Experiments 1 and 2). Rats trained to approach a beacon regardless of its location were subsequently impaired when the well-learned beacon was removed and other spatial cues identified the location of the goal (Experiment 3). The competition between beacon and place cues reflected learned irrelevance for place cues (Experiment 4). The findings differ from those of some studies of associative interactions between cue and place learning in other paradigms. |
| Address |
University of Toronto, Toronto, Ontario, Canada |
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English |
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Edition |
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1543-4494 |
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| Notes |
PMID:12882373 |
Approved |
no |
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refbase @ user @ |
Serial |
368 |
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| Author |
Vollmerhaus, B.; Roos, H.; Gerhards, H.; Knospe, C. |
| Title |
[Phylogeny, form and function of canine teeth in the horse] |
Type |
Journal Article |
| Year |
2003 |
Publication |
Anatomia, histologia, embryologia |
Abbreviated Journal |
Anat Histol Embryol |
| Volume |
32 |
Issue |
4 |
Pages |
212-217 |
| Keywords |
Animals; Cuspid/*anatomy & histology/radiography; Evolution; Horses/*anatomy & histology; Male; Phylogeny; *Social Dominance |
| Abstract |
The canine teeth of the horse developed phylogenically from the simple, pointed, short-rooted tooth form of the leaf eating, in pairs living, Eocene horse Hyracotherium and served up to the Oligocene as a means of defense (self preservation). In the Miocene the living conditions of the Merychippus changed and they took to eating grass and adopted as a new behavior the life in a herd. The canine teeth possibly played an important role in fights for social ranking; they changed from a crown form to knife-like shape. In the Pliohippus the canine tooth usually remained in male horses and since the Pliocene, it contributed to the fights between stallions, to ensure that the offspring only came from the strongest animals (preservation of the species). Form and construction of the canine tooth are described and discussed in detail under the above mentioned phylogenic and ethologic aspects. |
| Address |
Institut fur Tieranatomie und Chirurgische Tierklinik der Universitat Munchen, Veterinarstrasse 13, D 80539 Munchen, Deutschland. c-neumueller@anat.vetmed.uni-muenchen.de |
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German |
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Original Title |
[Zur Phylogenie, Form und Funktion der Dentes canini des Pferdes] |
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0340-2096 |
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| Notes |
PMID:12919071 |
Approved |
no |
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refbase @ user @ |
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672 |
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| Author |
Couzin, I.D.; Krause, J. |
| Title |
Self-Organization and Collective Behavior in Vertebrates |
Type |
Book Chapter |
| Year |
2003 |
Publication |
Advances in the Study of Behavior |
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| Volume |
32 |
Issue |
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Pages |
1-75 |
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Academic Press |
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Editor |
Peter J. B. Slater, J.S.R., Charles T. Snowdon and Timothy J. Roper |
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0065-3454 |
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no |
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Equine Behaviour @ team @ |
Serial |
5144 |
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| Author |
Sluyter F.; Arseneault L.; Moffitt T.E.; Veenema A.H.; de Boer S.; Koolhaas J.M. |
| Title |
Toward an Animal Model for Antisocial Behavior: Parallels Between Mice and Humans: Aggression |
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Journal Article |
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2003 |
Publication |
Behavior Genetics |
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33 |
Issue |
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Pages |
563-574 |
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refbase @ user @ |
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3497 |
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