| Records |
| Author |
de Waal, F.B. |
| Title |
Primates--A natural heritage of conflict resolution |
Type |
Journal Article |
| Year |
2000 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
| Volume |
289 |
Issue |
5479 |
Pages |
586-590 |
| Keywords |
Aggression/*psychology; Animals; Behavior, Animal; *Conflict (Psychology); Female; Humans; Male; *Primates; *Social Behavior; Social Dominance |
| Abstract |
The traditional notion of aggression as an antisocial instinct is being replaced by a framework that considers it a tool of competition and negotiation. When survival depends on mutual assistance, the expression of aggression is constrained by the need to maintain beneficial relationships. Moreover, evolution has produced ways of countering its disruptive consequences. For example, chimpanzees kiss and embrace after fights, and other nonhuman primates engage in similar “reconciliations.” Theoretical developments in this field carry implications for human aggression research. From families to high schools, aggressive conflict is subject to the same constraints known of cooperative animal societies. It is only when social relationships are valued that one can expect the full complement of natural checks and balances. |
Address  |
Living Links, Center for the Advanced Study of Human and Ape Evolution, Yerkes Regional Primate Research Center, and Psychology Department, Emory University, Atlanta, GA 30322, USA. dewaal@emory.edu |
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English |
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| ISSN |
0036-8075 |
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| Notes |
PMID:10915614 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
187 |
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| Author |
Baker, K.C.; Seres, E.; Aureli, F.; De Waal, F.B. |
| Title |
Injury risks among chimpanzees in three housing conditions |
Type |
Journal Article |
| Year |
2000 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
| Volume |
51 |
Issue |
3 |
Pages |
161-175 |
| Keywords |
Aggression; *Animal Welfare; Animals; Female; *Housing, Animal; Male; *Pan troglodytes; Risk Assessment; Wounds and Injuries/*veterinary |
| Abstract |
Meeting the psychological needs of chimpanzees (Pan troglodytes) can be a challenge given their aggressiveness on the one hand and the complexity of their social lives on the other. It is unclear how to balance the need to provide opportunities for species-appropriate behavior against potential risks of injury chimpanzees may inflict on each other. This study evaluates the suggestion that simpler social environments protect chimpanzees from wounding. Over a two-year period all visible injuries to 46 adult males, 64 adult females, and 25 immature chimpanzees were recorded at the Yerkes Regional Primate Research Center. Approximately half of the subjects were mother-reared, and the rest were nursery-reared. Housing included compounds containing about 20 chimpanzees, interconnected indoor-outdoor runs for groups of up to 12 individuals, and smaller indoor-outdoor runs for pairs and trios. Annual wounding rates were calculated for serious wounds (extensive injuries and all those requiring veterinary intervention) as well as for minor wounds. Compound-housed chimpanzees incurred the highest level of minor wounding, but serious wounding levels were not affected by housing condition. Even with a period of dominance instability and elevated levels of wounding in one compound, compound chimpanzees were not injured more than those in smaller social groups over the long term. Nursery-reared females in moderate-sized groups were wounded more than mother-reared females. Also, nursery-reared males and females were wounded less often when paired with mother-reared companions. Overall, this study indicates that maintaining chimpanzees in pairs and trios would not be an effective means for reducing injuries. The management of wounding in chimpanzee colonies is influenced more by the sex and rearing composition of a colony. |
| Address |
Living Links Center, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA. kateb@rmy.emory.edu |
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English |
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| ISSN |
0275-2565 |
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| Notes |
PMID:10902665 |
Approved |
no |
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refbase @ user @ |
Serial |
188 |
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| Author |
de Waal, F.B.; Aureli, F.; Judge, P.G. |
| Title |
Coping with crowding |
Type |
Journal Article |
| Year |
2000 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
| Volume |
282 |
Issue |
5 |
Pages |
76-81 |
| Keywords |
*Adaptation, Psychological; Animals; Behavior, Animal; Emotions; Female; Grooming; Homicide; Humans; Macaca mulatta; Male; Pan troglodytes; *Population Density; Primates; Rodentia; Rural Population; Territoriality; Urban Population; Violence |
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| Address |
Living Links Center, Yerkes Regional Primate Research Center, Atlanta, USA |
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English |
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| ISSN |
0036-8733 |
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| Notes |
PMID:11056991 |
Approved |
no |
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refbase @ user @ |
Serial |
184 |
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| Author |
de Waal, F.B. |
| Title |
The end of nature versus nurture |
Type |
Journal Article |
| Year |
1999 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
| Volume |
281 |
Issue |
6 |
Pages |
94-99 |
| Keywords |
Animals; *Behavior; Behavior, Animal; Ecology; *Environment; Ethology; Evolution; Female; *Genetics; Humans; Instinct; Learning; Male; Sex Characteristics; Twin Studies |
| Abstract |
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| Address |
Living Links Center, Yerkes Regional Primate Research Center, Atlanta, USA |
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English |
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0036-8733 |
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| Notes |
PMID:10614071 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
192 |
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| Author |
Brosnan, S.F.; Freeman, C.; De Waal, F.B.M. |
| Title |
Partner's behavior, not reward distribution, determines success in an unequal cooperative task in capuchin monkeys |
Type |
Journal Article |
| Year |
2006 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
| Volume |
68 |
Issue |
7 |
Pages |
713-724 |
| Keywords |
Animals; Behavior, Animal/*physiology; Cebus/*physiology; *Cooperative Behavior; Female; Food Preferences/physiology; Male; *Reward |
| Abstract |
It was recently demonstrated that capuchin monkeys notice and respond to distributional inequity, a trait that has been proposed to support the evolution of cooperation in the human species. However, it is unknown how capuchins react to inequitable rewards in an unrestricted cooperative paradigm in which they may freely choose both whether to participate and, within the bounds of their partner's behavior, which reward they will receive for their participation. We tested capuchin monkeys with such a design, using a cooperative barpull, which has been used with great success in the past. Contrary to our expectations, the equity of the reward distribution did not affect success or pulling behavior. However, the behavior of the partner in an unequal situation did affect overall success rates: pairs that had a tendency to alternate which individual received the higher-value food in unequal reward situations were more than twice as successful in obtaining rewards than pairs in which one individual dominated the higher-value food. This ability to equitably distribute rewards in inherently biased cooperative situations has profound implications for activities such as group hunts, in which multiple individuals work together for a single, monopolizable reward. |
| Address |
Living Links Center, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA. sbrosna@emory.edu |
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English |
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Edition |
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| ISSN |
0275-2565 |
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| Notes |
PMID:16786518 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
160 |
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| Author |
Brosnan, S.F.; de Waal, F.B.M. |
| Title |
Socially learned preferences for differentially rewarded tokens in the brown capuchin monkey (Cebus apella) |
Type |
Journal Article |
| Year |
2004 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
| Volume |
118 |
Issue |
2 |
Pages |
133-139 |
| Keywords |
Animals; Behavior, Animal; Cebus; *Choice Behavior; Female; *Learning; Male; *Reward; *Social Behavior |
| Abstract |
Social learning is assumed to underlie traditions, yet evidence indicating social learning in capuchin monkeys (Cebus apella), which exhibit traditions, is sparse. The authors tested capuchins for their ability to learn the value of novel tokens using a previously familiar token-exchange economy. Capuchins change their preferences in favor of a token worth a high-value food reward after watching a conspecific model exchange 2 differentially rewarded tokens, yet they fail to develop a similar preference after watching tokens paired with foods in the absence of a conspecific model. They also fail to learn that the value of familiar tokens has changed. Information about token value is available in all situations, but capuchins seem to pay more attention in a social situation involving novel tokens. |
| Address |
Living Links Center, Yerkes National Primate Research Center, and Graduate Division of Biological and Biomedical Sciences, Emory University, Atlanta, GA 30329, USA. sbrosna@emory.edu |
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English |
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Edition |
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| ISSN |
0735-7036 |
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Conference |
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| Notes |
PMID:15250800 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
173 |
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| Author |
Brosnan, S.F.; de Waal, F.B.M. |
| Title |
A concept of value during experimental exchange in brown capuchin monkeys, Cebus apella |
Type |
Journal Article |
| Year |
2004 |
Publication |
Folia primatologica; international journal of primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
| Volume |
75 |
Issue |
5 |
Pages |
317-330 |
| Keywords |
Animals; Cebus/*psychology; *Choice Behavior; Female; Food Preferences; *Learning; Male; Sex Factors; Statistics, Nonparametric; *Token Economy; Video Recording |
| Abstract |
We evaluated the response of brown capuchin monkeys to two differentially valued tokens in an experimental exchange situation akin to a simple barter. Monkeys were given a series of three tests to evaluate their ability to associate tokens with food, then their responses were examined in a barter situation in which tokens were either limited or unlimited. Capuchins did not perform barter in the typical sense, returning the tokens which were associated with the reward. However, females, but not males, showed a different response, preferring the higher-value token. This may indicate that they learned to prefer one token over the other rather than to associate the tokens with their specific rewards. This sex difference parallels previous findings of greater reciprocity in female brown capuchins than in males. |
| Address |
Living Links Center, Emory University, Yerkes National Primate Research Center, 954 N. Gatewood Drive, Atlanta, GA 30329, USA. sbrosna@emory.edu |
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English |
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Edition |
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0015-5713 |
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| Notes |
PMID:15486443 |
Approved |
no |
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refbase @ user @ |
Serial |
170 |
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| Author |
de Waal, F.B.M.; Dindo, M.; Freeman, C.A.; Hall, M.J. |
| Title |
The monkey in the mirror: hardly a stranger |
Type |
Journal Article |
| Year |
2005 |
Publication |
Proceedings of the National Academy of Sciences of the United States of America |
Abbreviated Journal |
Proc. Natl. Acad. Sci. U.S.A. |
| Volume |
102 |
Issue |
32 |
Pages |
11140-11147 |
| Keywords |
Analysis of Variance; Animals; Cebus/*physiology; *Discrimination (Psychology); Empathy; Female; Male; Observation; *Recognition (Psychology); *Self Concept; Sex Factors |
| Abstract |
It is widely assumed that monkeys see a stranger in the mirror, whereas apes and humans recognize themselves. In this study, we question the former assumption by using a detailed comparison of how monkeys respond to mirrors versus live individuals. Eight adult female and six adult male brown capuchin monkeys (Cebus apella) were exposed twice to three conditions: (i) a familiar same-sex partner, (ii) an unfamiliar same-sex partner, and (iii) a mirror. Females showed more eye contact and friendly behavior and fewer signs of anxiety in front of a mirror than they did when exposed to an unfamiliar partner. Males showed greater ambiguity, but they too reacted differently to mirrors and strangers. Discrimination between conditions was immediate, and blind coders were able to tell the difference between monkeys under the three conditions. Capuchins thus seem to recognize their reflection in the mirror as special, and they may not confuse it with an actual conspecific. Possibly, they reach a level of self-other distinction intermediate between seeing their mirror image as other and recognizing it as self. |
| Address |
Living Links Center, Emory University, Atlanta, GA 30322, USA. dewaal@emory.edu |
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English |
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0027-8424 |
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| Notes |
PMID:16055557 |
Approved |
no |
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refbase @ user @ |
Serial |
164 |
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| Author |
de Waal, F.B.M. |
| Title |
How animals do business |
Type |
Journal Article |
| Year |
2005 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
| Volume |
292 |
Issue |
4 |
Pages |
54-61 |
| Keywords |
Animals; Attitude; *Behavior, Animal; Cebus; Cooperative Behavior; *Economics; Emotions; Fishes; Food; Humans; Pan troglodytes; Papio; Social Behavior |
| Abstract |
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Emory University, USA |
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English |
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Edition |
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0036-8733 |
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| Notes |
PMID:15915815 |
Approved |
no |
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refbase @ user @ |
Serial |
166 |
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| Author |
Parr, L.A.; Hopkins, W.D.; de Waal, F.B. |
| Title |
Haptic discrimination in capuchin monkeys (Cebus apella): evidence of manual specialization |
Type |
Journal Article |
| Year |
1997 |
Publication |
Neuropsychologia |
Abbreviated Journal |
Neuropsychologia |
| Volume |
35 |
Issue |
2 |
Pages |
143-152 |
| Keywords |
Aging/psychology; Animals; Cebus; Cues; Discrimination (Psychology)/*physiology; Female; Functional Laterality/*physiology; Male; Psychomotor Performance/physiology; Sex Characteristics; Touch/physiology |
| Abstract |
Two experiments investigated the effects of haptic and visual discrimination on hand preference in 22 brown capuchin monkeys (Cebus apella). The percentage of left-handed subjects in Experiment 1 were 63.6%, 45.5%, and 18.2% for haptic, bipedal, and quadrupedal reaching, respectively. In Experiment 2, the haptic demands of the task were manipulated by using additional food types and another tactile medium. Left-hand preferences were further strengthened when reaching into water compared to pineshavings in Experiment 1. Reaching with no tactile interference resulted in equal numbers of lateralized and nonlateralized subjects. These results show that when reaching demands the use of haptic cues, as opposed to visual ones, monkeys shift towards greater left hand use. This is consistent with what is known about right hemisphere superiority for haptic discrimination in humans. |
| Address |
Division of Psychobiology, Yerkes Regional Primate Research Center, Atlanta, GA 30329, USA. parr@rmy.-emory.edu |
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0028-3932 |
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| Notes |
PMID:9025118 |
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no |
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refbase @ user @ |
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201 |
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