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Author |
Judge, P.G.; de Waal, F.B.; Paul, K.S.; Gordon, T.P. |
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Title |
Removal of a trauma-inflicting alpha matriline from a group of rhesus macaques to control severe wounding |
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Journal Article |
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Year |
1994 |
Publication |
Laboratory animal science |
Abbreviated Journal |
Lab Anim Sci |
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Volume |
44 |
Issue |
4 |
Pages |
344-350 |
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*Aggression; Animals; Female; *Macaca mulatta; Male; *Monkey Diseases; *Social Dominance; Wounds and Injuries/epidemiology/prevention & control/*veterinary |
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Wounding in an 83-member group of rhesus macaques (Macaca mulatta) housed at the Yerkes Regional Primate Research Center Field Station became excessive to the point that intervention was deemed necessary. When observations indicated that three females from the group's alpha matriline were principally responsible for the wounding, the matriline (N = 7) was removed from the group. This study was conducted to document an atypical pattern of wounding in this group and to evaluate the effectiveness of removal as a procedure for controlling injuries. The aggression rates of 21 adult subjects and the wounds of all group members were recorded before and after the removal procedure and compared with those in a similar-sized group. Removing the alpha matriline did not alter aggression rates in the group or the rank order among the remaining matrilines. Aggression rates in the experimental group were also not significantly different from those in the comparison group before or after the removal. With the alpha matriline present, wounding levels in the group were significantly higher than those in the comparison group. After removal of the matriline, the frequency of wounds decreased significantly to levels similar to those of the comparison group. The pattern of excess wounding attributed to the extracted alpha females was idiosyncratic, involving removal of large patches of skin from the hindquarters of adult females or removal of the distal portion of the fingers, toes, or tail from juveniles.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Yerkes Regional Primate Research Center, Emory University, Atlanta, GA 30329 |
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0023-6764 |
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PMID:7983846 |
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refbase @ user @ |
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207 |
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Author |
de Waal, F.B.; Aureli, F.; Judge, P.G. |
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Title |
Coping with crowding |
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Journal Article |
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Year |
2000 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
282 |
Issue |
5 |
Pages |
76-81 |
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*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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Living Links Center, Yerkes Regional Primate Research Center, Atlanta, USA |
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0036-8733 |
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PMID:11056991 |
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184 |
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Author |
Weaver, A.; de Waal, F.B.M. |
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Title |
The mother-offspring relationship as a template in social development: reconciliation in captive brown capuchins (Cebus apella) |
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Journal Article |
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Year |
2003 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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117 |
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1 |
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101-110 |
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*Adaptation, Psychological; Animals; Behavior, Animal/*physiology; Cebus; Conflict (Psychology); Female; Male; *Maternal Behavior; Pilot Projects; *Social Behavior; Statistics, Nonparametric |
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Mother-offspring (MO) relationship quality was investigated to determine its influence on the development of reconciliation--affiliation between opponents shortly after a fight--because it influenceswhat distressed youngsters learn about calming down. Data were longitudinal and cross-sectional observational samples of 38 MO pairs of monkeys across 24 months. An MO relationship quality index (RQI) classified each pair as secure or insecure. Reconciliation emerged in infancy.Secure youngsters had an appeasing conciliatory style, and insecure youngsters had an agitated conciliatory style. Conclusions are that reconciliation develops from the attachment behavior system and MO RQI is related to the particular conciliatory style youngsters develop by affecting how aroused they are by conflict and the subsequent socializing they seek to calm down. |
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Living Links, Yerkes Primate Center and Psychology Department, Emory University, Atlanta, Georgia 30322, USA. dazzlingdolphins@cox.net |
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0735-7036 |
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PMID:12735370 |
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refbase @ user @ |
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180 |
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Author |
Bonnie, K.E.; Horner, V.; Whiten, A.; de Waal, F.B.M. |
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Title |
Spread of arbitrary conventions among chimpanzees: a controlled experiment |
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Journal Article |
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Year |
2007 |
Publication |
Proceedings. Biological sciences / The Royal Society |
Abbreviated Journal |
Proc Biol Sci |
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Volume |
274 |
Issue |
1608 |
Pages |
367-372 |
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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. |
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Living Links, Yerkes National Primate Research Center, Atlanta, GA 30329, USA. kebonni@emory.edu |
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0962-8452 |
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PMID:17164200 |
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no |
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refbase @ user @ |
Serial |
157 |
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Author |
Dindo, M.; De Waal, F.B.M. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Partner effects on food consumption in brown capuchin monkeys |
Type |
Journal Article |
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Year |
2007 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
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69 |
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4 |
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448-456 |
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It has been claimed that capuchin monkeys (Cebus apella) show inequity aversion in relation to food rewards for a simple exchange task. However, other factors may affect the willingness of a monkey to consume foods of high or low value in the presence of a conspecific. In this study, pairs of monkeys were presented with unequally valued foods, but without any task-performance: they simply received the food under four experimental conditions. By looking at the rate of collection and consumption of low-valued cucumber slices we expected to see variation dependent on whether the partner either had 1) cucumber (equity), 2) grape (inequity), 3) inaccessible cucumber or 4) inaccessible grape. Testing 12 adult capuchin monkeys, our findings differed from those of other authors in that the monkeys failed to show negative reactions to inequity, but rather responded with scramble competition (i.e., fast food collection) in the presence of a conspecific without access to food. They also showed facilitated consumption in the presence of a conspecific consuming high-valued food. Possibly, (in)equity plays a different role if food serves as a reward for a task rather than if it is simply made available for consumption. Am. J. Primatol. 69:1-9, 2007. (c) 2006 Wiley-Liss, Inc. |
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Living Links, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia |
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0275-2565 |
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PMID:17146793 |
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refbase @ user @ |
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158 |
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Author |
Call, J.; Aureli,F.; de Waal, F.B. M. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Reconciliation patterns among stumptailed macaques: a multivariate approach |
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Journal Article |
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Year |
1999 |
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Animal Behaviour. |
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Anim. Behav. |
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58 |
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1 |
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165-172 |
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This study focused on two aspects of the dynamics of reconciliation in stumptailed macaques, Macaca arctoides. First, we investigated the combined effects of multiple variables (i.e. sex, age, rank, conflict intensity, outcome, or number of participants, interopponent distance, kinship and friendship) on the occurrence of reconciliation. Second, we investigated whether opponents used different behaviour patterns in their postconflict reunions depending on the characteristics of their conflicts or their relationship with their opponents. We studied a multimale, multifemale group of 38 stumptailed macaques housed in a large outdoor compound. Three types of data were collected: (1) instantaneous scan sampling of contact sitting to infer 'friendship'; (2) ad libitum data on bared-teeth and teeth-chattering displays to infer dominance rank; (3) 10-min focal observations during postconflict (PC) and matched control (MC) periods in which we recorded interopponent distance at the beginning of the observation and all aggressive and affiliative behaviours between former opponents. Our study confirmed the high conciliatory tendency of stumptailed macaques previously reported for other groups. A stepwise logistic regression revealed that initial interopponent distance in PC, friendship and kinship were the only factors that independently contributed to explain the occurrence of reconciliation. Two main clusters of postconflict behavioural patterns emerged: allogrooming+contact sitting and sociosexual behaviours (e.g. hold-bottom). It is hypothesized that postconflict allogrooming and contact sitting may be used for the maintenance of valuable relationships, whereas sociosexual behaviours may be used more indiscriminately by any pair of opponents as a buffering mechanism to prevent immediate recurrence of aggression. Copyright 1999 The Association for the Study of Animal Behaviour. |
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School of Biological Sciences, University of Liverpool |
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0003-3472 |
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PMID:10413553 |
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refbase @ user @ |
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194 |
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Parr, L.A.; Matheson, M.D.; Bernstein, I.S.; De Waal, F.B.M. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Grooming down the hierarchy: allogrooming in captive brown capuchin monkeys, Cebus apella |
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Journal Article |
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1997 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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54 |
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2 |
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361-367 |
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Observations of captive female brown capuchin monkeys in five groups revealed that grooming is primarily the occupation of dominant females at both the individual and dyadic levels. When categorized according to rank class, alpha females were the only class to perform significantly more grooming than they received. These results are inconsistent with reports on vervets, baboons and macaques, and suggest that grooming in capuchin monkeys may have different functions from those reported for cercopithecine primates. A dyadic analysis revealed, however, that grooming occurred more often between closely ranked females, similar to what is seen in several Old World monkey species. Therefore, some aspects of grooming in capuchins are similar to that seen in Old World monkeys, but the way they distribute grooming is different, which may prompt a re-evaluation of current theories regarding the social function of allogrooming in non-human primates. |
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Yerkes Regional Primate Research Center and Department of Psychology, Emory University |
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0003-3472 |
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PMID:9268468 |
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refbase @ user @ |
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200 |
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Call, J.; Aureli, F.; de Waal, F.B.M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Postconflict third-party affiliation in stumptailed macaques |
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Journal Article |
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2002 |
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Animal Behaviour. |
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Anim. Behav. |
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63 |
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2 |
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209-216 |
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Stumptailed macaques, Macaca arctoides, are characterized by high levels of postconflict affiliative contacts between opponents. We investigated the occurrence of postconflict affiliative contacts between opponents and third parties that were not involved in the original conflict. We collected 10-min focal observations during postconflict and control periods in which we recorded all aggressive and affiliative behaviours between opponents and third parties. We distinguished three types of third parties depending on the relationship with the focal animal: own kin, opponent's kin and individuals unrelated to both opponents. We analysed the interactions with third parties separately, while distinguishing two classes of affiliative behaviours: (1) allogrooming and contact sitting and (2) sociosexual behaviours (e.g. genital inspection). The macaques showed differences between postconflict and control periods in their affiliative contacts with third parties. Aggressors received more postconflict grooming and contact sitting from their opponents' kin, received more sociosexual behaviour from their own kin and unrelated individuals, and directed more sociosexual behaviour to unrelated individuals. Victims received and directed less postconflict grooming from and towards their own kin. They received more postconflict sociosexual behaviour from all partners except their own kin and directed more sociosexual behaviour to all partners except the opponent's kin. This study establishes the occurrence of multiple postconflict triadic affiliation in stumptailed macaques, and is the first to show that victims receive contacts from third parties in a cercopithecine species, a behaviour previously described only in chimpanzees. It also highlights the importance of analysing the different affiliative behaviours separately in postconflict situations. Otherwise, many of the patterns we report, especially those involving victims, would have been missed. |
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de Waal, F.B.M. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Chimpanzee politics:power and sex among apes. |
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1982 |
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Johns Hopkins University Press |
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Baltimore |
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Equine Behaviour @ team @ |
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4857 |
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Author |
de Waal, F.B.M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Putting the Altruism Back into Altruism: The Evolution of Empathy |
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Journal Article |
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2008 |
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Annual Review of Psychology |
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Annu Rev Psychol |
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59 |
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1 |
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279-300 |
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Evolutionary theory postulates that altruistic behavior evolved for the return-benefits it bears the performer. For return-benefits to play a motivational role, however, they need to be experienced by the organism. Motivational analyses should restrict themselves, therefore, to the altruistic impulse and its knowable consequences. Empathy is an ideal candidate mechanism to underlie so-called directed altruism, i.e., altruism in response to anothers's pain, need, or distress. Evidence is accumulating that this mechanism is phylogenetically ancient, probably as old as mammals and birds. Perception of the emotional state of another automatically activates shared representations causing a matching emotional state in the observer. With increasing cognition, state-matching evolved into more complex forms, including concern for the other and perspective-taking. Empathy-induced altruism derives its strength from the emotional stake it offers the self in the other's welfare. The dynamics of the empathy mechanism agree with predictions from kin selection and reciprocal altruism theory. |
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Annual Reviews |
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doi: 10.1146/annurev.psych.59.103006.093625 |
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Equine Behaviour @ team @ |
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5058 |
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