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Author de Waal, F.B.; Johanowicz, D.L. openurl 
  Title Modification of reconciliation behavior through social experience: an experiment with two macaque species Type Journal Article
  Year 1993 Publication Child development Abbreviated Journal Child Dev  
  Volume 64 Issue 3 Pages 897-908  
  Keywords Aggression; Animals; *Behavior, Animal; Female; Grooming; *Macaca; *Macaca mulatta; Male; Play and Playthings; *Socialization; Vocalization, Animal  
  Abstract Reconciliation, defined as a friendly reunion between former opponents shortly after an aggressive encounter, is common in the stumptail macaque (Macaca arctoides) but rare in the rhesus macaque (M. mulatta). Juveniles of the two species were cohoused for 5 months, after which they were observed with conspecifics only. Control rhesus monkeys, matched in age and sex to the experimental subjects, went through the same procedure without exposure to the other species. A threefold increase in the proportion of reconciled fights was measured in the rhesus subjects. The difference emerged gradually during cohousing with the tutor species and was sustained following removal of this species. Other behavior, such as grooming and aggression, decreased over time. It is suggested that the social attitude of the subjects was affected through contact with a species characterized by a more relaxed dominance style.  
  Address Wisconsin Regional Primate Research Center, University of Wisconsin-Madison  
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  ISSN 0009-3920 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:8339702 Approved no  
  Call Number (up) refbase @ user @ Serial 209  
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Author de Waal, F.B.; Luttrell, L.M. openurl 
  Title The similarity principle underlying social bonding among female rhesus monkeys Type Journal Article
  Year 1986 Publication Folia primatologica; international journal of primatology Abbreviated Journal Folia Primatol (Basel)  
  Volume 46 Issue 4 Pages 215-234  
  Keywords Aggression; Animals; Dominance-Subordination; Female; Grooming; *Group Processes; Macaca/*physiology; Macaca mulatta/*physiology; Male; *Object Attachment  
  Abstract Twenty adult female rhesus monkeys (Macaca mulatta) were observed over a three-year period. They lived in a mixed captive group with kinship relations known for three generations. The study's aim was to test Seyfarth's [J. theor. Biol. 65: 671-698, 1977] model of rank-related grooming and to investigate two other possible determinants of social bonding, i.e. relative age and the group's stratification into two social classes. Data on affiliation, coalitions, and social competition were collected by means of both focal observation and instantaneous time sampling. Whereas certain elements of the existing model were confirmed, its explanatory principles were not. Social competition did not result in more contact among close-ranking females (the opposite effect was found), and the relation between affiliative behavior and coalitions was more complex than predicted. Based on multivariate analyses and a comparison of theoretical models, we propose a simpler, more encompassing principle underlying interfemale attraction. According to this 'similarity principle', rhesus females establish bonds with females whom they most resemble. The similarity may concern genetical and social background, age, hierarchical position and social class. Effects of these four factors were independently demonstrated. The most successful model assumed that similarity factors influence female bonding in a cumulative fashion.  
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  Series Volume Series Issue Edition  
  ISSN 0015-5713 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:3557225 Approved no  
  Call Number (up) refbase @ user @ Serial 211  
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Author Brannon, E.M.; Terrace, H.S. openurl 
  Title Ordering of the numerosities 1 to 9 by monkeys Type Journal Article
  Year 1998 Publication Science (New York, N.Y.) Abbreviated Journal Science  
  Volume 282 Issue 5389 Pages 746-749  
  Keywords Animals; *Discrimination (Psychology); Macaca mulatta/*psychology; *Mathematics; *Mental Processes  
  Abstract A fundamental question in cognitive science is whether animals can represent numerosity (a property of a stimulus that is defined by the number of discriminable elements it contains) and use numerical representations computationally. Here, it was shown that rhesus monkeys represent the numerosity of visual stimuli and detect their ordinal disparity. Two monkeys were first trained to respond to exemplars of the numerosities 1 to 4 in an ascending numerical order (1 --> 2 --> 3 --> 4). As a control for non-numerical cues, exemplars were varied with respect to size, shape, and color. The monkeys were later tested, without reward, on their ability to order stimulus pairs composed of the novel numerosities 5 to 9. Both monkeys responded in an ascending order to the novel numerosities. These results show that rhesus monkeys represent the numerosities 1 to 9 on an ordinal scale.  
  Address Department of Psychology, Columbia University, New York, NY 10027, USA. liz@psych.columbia.edu  
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  Series Volume Series Issue Edition  
  ISSN 0036-8075 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:9784133 Approved no  
  Call Number (up) refbase @ user @ Serial 606  
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Author Owren, M.J.; Dieter, J.A.; Seyfarth, R.M.; Cheney, D.L. doi  openurl
  Title Vocalizations of rhesus (Macaca mulatta) and Japanese (M. fuscata) macaques cross-fostered between species show evidence of only limited modification Type Journal Article
  Year 1993 Publication Developmental psychobiology Abbreviated Journal Dev Psychobiol  
  Volume 26 Issue 7 Pages 389-406  
  Keywords Animals; Animals, Newborn; Behavior, Animal; Discrimination Learning; Environment; Female; *Macaca; *Macaca mulatta; Male; Sound Spectrography; *Vocalization, Animal  
  Abstract Two rhesus and two Japanese macaque infants were cross-fostered between species in order to study the effects of auditory experience on vocal development. Both the cross-fostered and normally raised control subjects were observed over the first 2 years of life and their vocalizations were tape-recorded. We classified 8053 calls by ear, placed each call in one of six acoustic categories, and calculated the rates at which different call-types were used in different social contexts. Species differences were found in the use of “coo” and “gruff” vocalizations among control subjects. Japanese macaques invariably produced coos almost exclusively. In contrast, rhesus macaques produced a mixture of coos and gruffs and showed considerable interindividual variation in the relative use of one call type or the other. Cross-fostered Japanese macaques adhered to their species-typical behavior, rarely using gruffs. Cross-fostered rhesus subjects also exhibited species-typical behavior in many contexts, but in some situations produced coos and gruffs at rates that were intermediate between those shown by normally raised animals of the two species. This outcome suggests that environmentally mediated modification of vocal behavior may have occurred, but that the resulting changes were quite limited.  
  Address California Regional Primate Research Center, University of California, Davis  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 0012-1630 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:8270122 Approved no  
  Call Number (up) refbase @ user @ Serial 700  
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Author Cook, M.; Mineka, S.; Wolkenstein, B.; Laitsch, K. openurl 
  Title Observational conditioning of snake fear in unrelated rhesus monkeys Type Journal Article
  Year 1985 Publication Journal of abnormal psychology Abbreviated Journal J Abnorm Psychol  
  Volume 94 Issue 4 Pages 591-610  
  Keywords Animals; *Conditioning, Classical; *Fear; Female; Macaca mulatta; Male; Snakes  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0021-843X ISBN Medium  
  Area Expedition Conference  
  Notes PMID:4078162 Approved no  
  Call Number (up) refbase @ user @ Serial 707  
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Author Brennan, J.; Anderson, J. doi  openurl
  Title Varying responses to feeding competition in a group of rhesus monkeys (Macaca mulatta) Type Journal Article
  Year 1988 Publication Primates Abbreviated Journal Primates  
  Volume 29 Issue 3 Pages 353-360  
  Keywords Macaca mulatta – Dominance – Feeding – Agonistic behaviour – Snakes  
  Abstract The behaviour of members of a group of rhesus monkeys was observed in experimentally created, competitive feeding situations. Socially dominant members of the group tended to start eating before lower-ranking subjects, and generally ate more. Dominants sometimes used aggression to control access to food, but overall, intermediate-ranking monkeys were involved in most agonistic episodes. Non-dominant subjects improved their feeding performance when food was presented in three piles rather than one pile, often by snatching food and consuming it away from the pile. These general patterns were less evident when realistic snake models were placed on some of the food piles. Feeding was disrupted by the presence of snakes, but notably, subordinates risked feeding in these conditions. Piles containing preferred foods and snakes were eaten from, but a low-preference food (carrot) under snakes went untouched by all subjects. The results suggest that group-members evaluate potential risks and benefits of competing for a restricted resource, and that dominance status, while an important factor, is only one element in the equation.  
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  Notes Approved no  
  Call Number (up) refbase @ user @ Serial 809  
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