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Author |
Sundaresan, S.R.; Fischhoff, I.R.; Dushoff, J.; Rubenstein, D.I. |
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Title |
Network metrics reveal differences in social organization between two fission-fusion species, Grevy's zebra and onager |
Type |
Journal Article |
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Year |
2007 |
Publication |
Oecologia |
Abbreviated Journal |
Oecologia |
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Volume |
151 |
Issue |
1 |
Pages |
140-149 |
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Keywords |
Analysis of Variance; Animals; Behavior, Animal/*physiology; *Environment; Equidae/*physiology; Female; India; Kenya; Male; *Models, Theoretical; *Social Behavior; *Social Environment |
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Abstract |
For species in which group membership frequently changes, it has been a challenge to characterize variation in individual interactions and social structure. Quantifying this variation is necessary to test hypotheses about ecological determinants of social patterns and to make predictions about how group dynamics affect the development of cooperative relationships and transmission processes. Network models have recently become popular for analyzing individual contacts within a population context. We use network metrics to compare populations of Grevy's zebra (Equus grevyi) and onagers (Equus hemionus khur). These closely related equids, previously described as having the same social system, inhabit environments differing in the distribution of food, water, and predators. Grevy's zebra and onagers are one example of many sets of coarsely similar fission-fusion species and populations, observed elsewhere in other ungulates, primates, and cetaceans. Our analysis of the population association networks reveals contrasts consistent with their distinctive environments. Grevy's zebra individuals are more selective in their association choices. Grevy's zebra form stable cliques, while onager associations are more fluid. We find evidence that females associate assortatively by reproductive state in Grevy's zebra but not in onagers. The current approach demonstrates the utility of network metrics for identifying fine-grained variation among individuals and populations in association patterns. From our analysis, we can make testable predictions about behavioral mechanisms underlying social structure and its effects on transmission processes. |
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Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA. ssundare@princeton.edu |
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English |
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0029-8549 |
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PMID:16964497 |
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no |
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Call Number |
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Serial |
1863 |
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Author |
Peltzer, K.; Mabilu, M.G.; Mathoho, S.F.; Nekhwevha, A.P.; Sikhwivhilu, T.; Sinthumule, T.S. |
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Title |
Trauma history and severity of gambling involvement among horse-race gamblers in a South African gambling setting |
Type |
Journal Article |
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Year |
2006 |
Publication |
Psychological Reports |
Abbreviated Journal |
Psychol Rep |
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Volume |
99 |
Issue |
2 |
Pages |
472-476 |
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Keywords |
Adult; African Continental Ancestry Group/*psychology/statistics & numerical data; Aged; Aged, 80 and over; Cross-Sectional Studies; Female; Gambling/*psychology; Humans; *Life Change Events; Male; Middle Aged; Personality Inventory; Risk Factors; *Social Environment; Socioeconomic Factors; South Africa; Statistics; Stress Disorders, Post-Traumatic/epidemiology/*psychology |
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Abstract |
The purpose of this study was to ascertain the frequency of gambling involvement and the prevalence of problem gambling among horse race gamblers and to discover whether problem gambling in this sample is associated with a history of trauma. Among a sample of 266 South African horse-race gamblers (94% men and 6% women, Mage 46.8 yr., SD = 13.9, range 18-85 years), 31.2% were classified as probable pathological gamblers and 19.9% with problem gambling. Major weekly gambling activities included racetrack betting (82%), purchase of lottery tickets or scratch tickets (35%), purchase of sports lottery tickets (23%), and using casino type games (18%). Trauma history was significantly associated with gambling severity. |
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Human Sciences Research Council, University of Limpopo, Pretoria, South Africa. KPeltzer@hsrc.ac.za |
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0033-2941 |
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PMID:17153816 |
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no |
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Serial |
1850 |
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Author |
de Waal, F.B. |
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Title |
The end of nature versus nurture |
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Journal Article |
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Year |
1999 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
281 |
Issue |
6 |
Pages |
94-99 |
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Keywords |
Animals; *Behavior; Behavior, Animal; Ecology; *Environment; Ethology; Evolution; Female; *Genetics; Humans; Instinct; Learning; Male; Sex Characteristics; Twin Studies |
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Living Links Center, Yerkes Regional Primate Research Center, Atlanta, USA |
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0036-8733 |
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PMID:10614071 |
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no |
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Call Number |
refbase @ user @ |
Serial |
192 |
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Author |
Moehlman, P.D. |
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Title |
Endangered wild equids |
Type |
Journal Article |
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Year |
2005 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
292 |
Issue |
3 |
Pages |
74-81 |
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Keywords |
Africa; Americas; Animals; *Animals, Wild/physiology; Asia; *Conservation of Energy Resources; Environment; *Equidae/physiology; Food Chain; Humans; Male; Reproduction |
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IUCN-The World Conservation Union/Species Survival Commission Equid Specialist Group |
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0036-8733 |
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PMID:15859216 |
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no |
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Call Number |
refbase @ user @ |
Serial |
551 |
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Author |
Van Schaik, C. |
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Title |
Why are some animals so smart? |
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Journal Article |
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Year |
2006 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
294 |
Issue |
4 |
Pages |
64-71 |
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Keywords |
Animals; *Behavior, Animal; Cognition; Conditioning (Psychology); Culture; Environment; Equipment and Supplies; Evolution; Indonesia; *Intelligence; Learning; Pongo pygmaeus/*physiology; Social Behavior |
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Anthropological Institute and Museum, University of Zurich, Switzerland |
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ISSN |
0036-8733 |
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Notes |
PMID:16596881 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2830 |
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Permanent link to this record |
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Author |
Heinrich, B.; Bugnyar, T. |
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Title |
Just how smart are ravens? |
Type |
Journal Article |
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Year |
2007 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
296 |
Issue |
4 |
Pages |
64-71 |
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Keywords |
Animals; *Behavior, Animal; Crows/*physiology; Environment; *Intelligence; Predatory Behavior; Problem Solving; Thinking |
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University of Vermont, USA |
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0036-8733 |
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Notes |
PMID:17479632 |
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Call Number |
Equine Behaviour @ team @ |
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4101 |
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Author |
Cancedda, M. |
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Title |
[Social and behavioral organization of horses on the Giara (Sardinia): distribution and aggregation] |
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Journal Article |
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Year |
1990 |
Publication |
Bollettino della Societa italiana di biologia sperimentale |
Abbreviated Journal |
Boll Soc Ital Biol Sper |
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Volume |
66 |
Issue |
11 |
Pages |
1089-1096 |
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Keywords |
Animals; *Animals, Wild/physiology/psychology; Environment; Female; *Horses/physiology/psychology; Italy; Male; Population Density; Sexual Behavior, Animal; *Social Behavior; Social Dominance; Water |
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Abstract |
In this paper some considerations on the environment of the 42 Kmq of the volcanic-basaltic Giara tableland are discussed. Conditioning by the environment and its effect on the distribution of a population of 712 horses is illustrated in view of their social and behavioural organization. |
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Istituto di Fisiologia Generale e Speciale, Universita di Sassari |
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Italian |
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Original Title |
Introduzione all'organizzazione sociale e comportamentale dei cavallini sulla Giara (Sardegna): distribuzione ed aggregazione |
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ISSN |
0037-8771 |
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Notes |
PMID:2095819 |
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no |
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Call Number |
refbase @ user @ |
Serial |
673 |
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Author |
Seyfarth, R.M.; Cheney, D.L. |
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Title |
Signalers and receivers in animal communication |
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Journal Article |
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Year |
2003 |
Publication |
Annual review of psychology |
Abbreviated Journal |
Annu Rev Psychol |
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Volume |
54 |
Issue |
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Pages |
145-173 |
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Keywords |
Affect; *Animal Communication; Animals; Arousal; Auditory Perception; Motivation; *Social Behavior; Social Environment; Species Specificity; *Vocalization, Animal |
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Abstract |
In animal communication natural selection favors callers who vocalize to affect the behavior of listeners and listeners who acquire information from vocalizations, using this information to represent their environment. The acquisition of information in the wild is similar to the learning that occurs in laboratory conditioning experiments. It also has some parallels with language. The dichotomous view that animal signals must be either referential or emotional is false, because they can easily be both: The mechanisms that cause a signaler to vocalize do not limit a listener's ability to extract information from the call. The inability of most animals to recognize the mental states of others distinguishes animal communication most clearly from human language. Whereas signalers may vocalize to change a listener's behavior, they do not call to inform others. Listeners acquire information from signalers who do not, in the human sense, intend to provide it. |
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Address |
Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. seyfarth@psych.upenn.edu |
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ISSN |
0066-4308 |
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Notes |
PMID:12359915 |
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no |
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Call Number |
refbase @ user @ |
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690 |
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Author |
Kalin, N.H.; Shelton, S.E. |
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Title |
Nonhuman primate models to study anxiety, emotion regulation, and psychopathology |
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Journal Article |
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Year |
2003 |
Publication |
Annals of the New York Academy of Sciences |
Abbreviated Journal |
Ann N Y Acad Sci |
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Volume |
1008 |
Issue |
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Pages |
189-200 |
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Keywords |
Affect/*physiology; Amygdala/blood supply; Animals; Anxiety/genetics/*psychology; Brain/*blood supply; Brain Stem/blood supply; Carrier Proteins/genetics; Electroencephalography; *Inhibition (Psychology); Macaca mulatta; Membrane Glycoproteins/genetics; *Membrane Transport Proteins; *Nerve Tissue Proteins; Prefrontal Cortex/blood supply; Serotonin Plasma Membrane Transport Proteins; Social Environment; Temperament; Tomography, Emission-Computed |
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Abstract |
This paper demonstrates that the rhesus monkey provides an excellent model to study mechanisms underlying human anxiety and fear and emotion regulation. In previous studies with rhesus monkeys, stable, brain, endocrine, and behavioral characteristics related to individual differences in anxiety were found. It was suggested that, when extreme, these features characterize an anxious endophenotype and that these findings in the monkey are particularly relevant to understanding adaptive and maladaptive anxiety responses in humans. The monkey model is also relevant to understanding the development of human psychopathology. For example, children with extremely inhibited temperament are at increased risk to develop anxiety disorders, and these children have behavioral and biological alterations that are similar to those described in the monkey anxious endophenotype. It is likely that different aspects of the anxious endophenotype are mediated by the interactions of limbic, brain stem, and cortical regions. To understand the brain mechanisms underlying adaptive anxiety responses and their physiological concomitants, a series of studies in monkeys lesioning components of the neural circuitry (amygdala, central nucleus of the amygdala and orbitofrontal cortex) hypothesized to play a role are currently being performed. Initial findings suggest that the central nucleus of the amygdala modulates the expression of behavioral inhibition, a key feature of the endophenotype. In preliminary FDG positron emission tomography (PET) studies, functional linkages were established between the amygdala and prefrontal cortical regions that are associated with the activation of anxiety. |
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Address |
Department of Psychiatry, University of Wisconsin-Madison Medical School, 6001 Research Park Boulevard, Madison, WI 53711, USA. nkalin@facstaff.wisc.edu |
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ISSN |
0077-8923 |
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Notes |
PMID:14998885 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4133 |
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Permanent link to this record |
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Author |
[No authors listed] |
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Title |
International Conference on Environmental Cadmium: an overview |
Type |
Conference Article |
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Year |
1979 |
Publication |
Environmental Health Perspectives |
Abbreviated Journal |
Environ Health Perspect |
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Volume |
28 |
Issue |
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Pages |
297-30 |
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Keywords |
Animals; Cadmium/*toxicity; Cadmium Poisoning/metabolism; Congresses; Ecology; Environmental Exposure; Environmental Pollutants/*toxicity; Female; Forecasting; Haplorhini; Horses; Humans; Rats; Waste Disposal, Fluid |
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ISSN |
0091-6765 |
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Notes |
PMID:39745 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2694 |
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