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	Author	Plotnik, J.M.; de Waal, F.B.M.; Reiss, D.
	Title	Self-recognition in an Asian elephant			Type	Journal Article
	Year	2006	Publication	Proceedings of the National Academy of Sciences of the United States of America	Abbreviated Journal	Proc. Natl. Acad. Sci. U.S.A.
	Volume	103	Issue	45	Pages	17053-17057
	Keywords	Animals; Asia; Behavior, Animal; Cognition; Elephants/psychology; Female; Photic Stimulation
	Abstract	Considered an indicator of self-awareness, mirror self-recognition (MSR) has long seemed limited to humans and apes. In both phylogeny and human ontogeny, MSR is thought to correlate with higher forms of empathy and altruistic behavior. Apart from humans and apes, dolphins and elephants are also known for such capacities. After the recent discovery of MSR in dolphins (Tursiops truncatus), elephants thus were the next logical candidate species. We exposed three Asian elephants (Elephas maximus) to a large mirror to investigate their responses. Animals that possess MSR typically progress through four stages of behavior when facing a mirror: (i) social responses, (ii) physical inspection (e.g., looking behind the mirror), (iii) repetitive mirror-testing behavior, and (iv) realization of seeing themselves. Visible marks and invisible sham-marks were applied to the elephants' heads to test whether they would pass the litmus “mark test” for MSR in which an individual spontaneously uses a mirror to touch an otherwise imperceptible mark on its own body. Here, we report a successful MSR elephant study and report striking parallels in the progression of responses to mirrors among apes, dolphins, and elephants. These parallels suggest convergent cognitive evolution most likely related to complex sociality and cooperation.
	Address	Living Links, Yerkes National Primate Research Center, and Department of Psychology, Emory University, 532 North Kligo Circle, Atlanta, GA 30322, USA
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0027-8424	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:17075063			Approved	no
	Call Number	refbase @ user @			Serial	408
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	Author	Bonnie, K.E.; Horner, V.; Whiten, A.; de Waal, F.B.M.
	Title	Spread of arbitrary conventions among chimpanzees: a controlled experiment			Type	Journal Article
	Year	2007	Publication	Proceedings. Biological sciences / The Royal Society	Abbreviated Journal	Proc Biol Sci
	Volume	274	Issue	1608	Pages	367-372
	Keywords
	Abstract	Wild chimpanzees (Pan troglodytes) have a rich cultural repertoire--traditions common in some communities are not present in others. The majority of reports describe functional, material traditions, such as tool use. Arbitrary conventions have received far less attention. In the same way that observations of material culture in wild apes led to experiments to confirm social transmission and identify underlying learning mechanisms, experiments investigating how arbitrary habits or conventions arise and spread within a group are also required. The few relevant experimental studies reported thus far have relied on cross-species (i.e. human-ape) interaction offering limited ecological validity, and no study has successfully generated a tradition not involving tool use in an established group. We seeded one of two rewarded alternative endpoints to a complex sequence of behaviour in each of two chimpanzee groups. Each sequence spread in the group in which it was seeded, with many individuals unambiguously adopting the sequence demonstrated by a group member. In one group, the alternative sequence was discovered by a low ranking female, but was not learned by others. Since the action-sequences lacked meaning before the experiment and had no logical connection with reward, chimpanzees must have extracted both the form and benefits of these sequences through observation of others.
	Address	Living Links, Yerkes National Primate Research Center, Atlanta, GA 30329, USA. kebonni@emory.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0962-8452	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:17164200			Approved	no
	Call Number	refbase @ user @			Serial	157
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	Author	Flack, J.C.; Krakauer, D.C.; de Waal, F.B.M.
	Title	Robustness mechanisms in primate societies: a perturbation study			Type	Journal Article
	Year	2005	Publication	Proceedings. Biological sciences / The Royal Society	Abbreviated Journal	Proc Biol Sci
	Volume	272	Issue	1568	Pages	1091-1099
	Keywords	Aggression/physiology; Animals; Conflict (Psychology); Female; Hierarchy, Social; Macaca nemestrina/physiology; Male; Models, Theoretical; Observation; *Social Behavior
	Abstract	Conflict management mechanisms have a direct, critical effect on system robustness because they mitigate conflict intensity and help repair damaged relationships. However, robustness mechanisms can also have indirect effects on system integrity by facilitating interactions among components. We explore the indirect role that conflict management mechanisms play in the maintenance of social system robustness, using a perturbation technique to 'knockout' components responsible for effective conflict management. We explore the effects of knockout on pigtailed macaque (Macaca nemestrina) social organization, using a captive group of 84 individuals. This system is ideal in addressing this question because there is heterogeneity in performance of conflict management. Consequently, conflict managers can be easily removed without disrupting other control structures. We find that powerful conflict managers are essential in maintaining social order for the benefit of all members of society. We show that knockout of components responsible for conflict management results in system destabilization by significantly increasing mean levels of conflict and aggression, decreasing socio-positive interaction and decreasing the operation of repair mechanisms.
	Address	Santa Fe Institute, NM 87501, USA. jflack@santafe.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0962-8452	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16024369			Approved	no
	Call Number	refbase @ user @			Serial	165
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	Author	Brosnan, S.F.; Schiff, H.C.; de Waal, F.B.M.
	Title	Tolerance for inequity may increase with social closeness in chimpanzees			Type	Journal Article
	Year	2005	Publication	Proceedings. Biological sciences / The Royal Society	Abbreviated Journal	Proc Biol Sci
	Volume	272	Issue	1560	Pages	253-258
	Keywords	Analysis of Variance; Animals; Attitude; Group Processes; Pan troglodytes/psychology; Reward; *Social Behavior; Socioeconomic Factors
	Abstract	Economic decision-making depends on our social environment. Humans tend to respond differently to inequity in close relationships, yet we know little about the potential for such variation in other species. We examine responses to inequity in several groups of chimpanzees (Pan troglodytes) in a paradigm similar to that used previously in capuchin monkeys (Cebus apella). We demonstrate that, like capuchin monkeys, chimpanzees show a response to inequity of rewards that is based upon the partner receiving the reward rather than the presence of the reward alone. However, we also found a great amount of variation between groups tested, indicating that chimpanzees, like people, respond to inequity in a variable manner, which we speculate could be caused by such variables as group size, the social closeness of the group (as reflected in length of time that the group has been together) and group-specific traditions.
	Address	Yerkes National Primate Research Center, Emory University, 954 North Gatewood Drive, Atlanta, GA 30329, USA. sbrosna@emory.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0962-8452	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15705549			Approved	no
	Call Number	refbase @ user @			Serial	169
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	Author	de Waal, F.B.M.; Aureli, F.
	Title	Consolation, reconciliation, and a possible cognitive difference between macaque and chimpanzee			Type	Book Chapter
	Year	1996	Publication	Reaching into Thought: The Minds of the Great Apes	Abbreviated Journal
	Volume		Issue		Pages	80–110.
	Keywords
	Abstract	Russon,A.E.; Bard, K.A.; Parker, S.T.
	Address
	Corporate Author				Thesis
	Publisher	Cambridge University Press	Place of Publication	Cambridge	Editor	Russon,A.E.; Bard, K.A.; Parker, S.T.
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5060
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	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
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0036-8075	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:10915614			Approved	no
	Call Number	refbase @ user @			Serial	187
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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
	Address	Emory University, USA
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0036-8733	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15915815			Approved	no
	Call Number	refbase @ user @			Serial	166
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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
	Abstract
	Address	Living Links Center, Yerkes Regional Primate Research Center, Atlanta, USA
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0036-8733	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:11056991			Approved	no
	Call Number	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
	Address	Living Links Center, Yerkes Regional Primate Research Center, Atlanta, USA
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0036-8733	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:10614071			Approved	no
	Call Number	refbase @ user @			Serial	192
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	Author	de Waal, F.B.
	Title	Bonobo sex and society			Type	Journal Article
	Year	1995	Publication	Scientific American	Abbreviated Journal	Sci Am
	Volume	272	Issue	3	Pages	82-88
	Keywords	Animals; Evolution; Female; Hominidae; Humans; Male; Pan troglodytes/physiology; Sexual Behavior, Animal/physiology; Social Behavior
	Abstract
	Address	Yerkes Regional Primate Research Center, Atlanta
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0036-8733	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:7871411			Approved	no
	Call Number	refbase @ user @			Serial	206
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