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Author Brannon, E.M.; Terrace, H.S. openurl 
  Title Representation of the numerosities 1-9 by rhesus macaques (Macaca mulatta) Type Journal Article
  Year 2000 Publication Journal of Experimental Psychology. Animal Behavior Processes Abbreviated Journal J Exp Psychol Anim Behav Process  
  Volume 26 Issue 1 Pages 31-49  
  Keywords Animals; *Cognition; Macaca mulatta/*psychology; *Mathematics; Perception; Reaction Time  
  Abstract Three rhesus monkeys (Macaca mulatta) were trained to respond to exemplars of 1, 2, 3, and 4 in an ascending, descending, or a nonmonotonic numerical order (1-->2-->3-->4, 4-->3-->2--1, 3-->1-->4-->2). The monkeys were then tested on their ability to order pairs of the novel numerosities 5-9. In Experiment 1, all 3 monkeys ordered novel exemplars of the numerosities 1-4 in ascending or descending order. The attempt to train a nonmonotonic order (3-->1-->4-->2) failed. In Experiment 2A, the 2 monkeys who learned the ascending numerical rule ordered pairs of the novel numerosities 5-9 on unreinforced trials. The monkey who learned the descending numerical rule failed to extrapolate the descending rule to new numerosities. In Experiment 2B all 3 monkeys ordered novel exemplars of pairs of the numerosities 5-9. Accuracy and latency of responding revealed distance and magnitude effects analogous to previous findings with human participants (R. S. Moyer & T. K. Landaeur, 1967). Collectively these studies show that monkeys represent the numerosities 1-9 on at least an ordinal scale.  
  Address Department of Psychology, Columbia University, New York, New York 10027, USA. liz@psych.columbia.edu  
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  Language English Summary Language Original Title (up)  
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  Series Volume Series Issue Edition  
  ISSN 0097-7403 ISBN Medium  
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  Notes PMID:10650542 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2775  
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Author Kirkwood, J.K. openurl 
  Title Animal minds and animal welfare Type Journal Article
  Year 2000 Publication The Veterinary Record Abbreviated Journal Vet. Rec.  
  Volume 146 Issue 11 Pages 327  
  Keywords *Animal Welfare; Animals; Animals, Domestic/*psychology; *Cognition; Consciousness; Veterinary Medicine/standards  
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  Language English Summary Language Original Title (up)  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0042-4900 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:10766123 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2856  
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Author Pereira, M.E.; Schill, J.L.; Charles, E.P. doi  openurl
  Title Reconciliation in captive Guyanese squirrel monkeys (Saimiri sciureus) Type Journal Article
  Year 2000 Publication American journal of primatology Abbreviated Journal Am. J. Primatol.  
  Volume 50 Issue 2 Pages 159-167  
  Keywords Aggression; Agonistic Behavior; Animals; Conflict (Psychology); Female; Guyana; Male; Saimiri/*psychology; *Social Behavior; Social Dominance  
  Abstract The tendency for agonistic interaction to increase the probability of friendly interaction between social partners has been demonstrated across a range of Old World primates. While research on such post-conflict behavior proceeds into an hypothesis-testing phase, new comparative information must accumulate to provide full phylogenetic perspective on primate social behavior. Data from New World and prosimian primates are yet extremely limited. We studied captive squirrel monkeys (Saimiri sciureus) via post-conflict (PC) and matched control (MC) observations and analyzed results using both the PC-MC and time-rule methods. Former opponents maintaining affiliative relationships soon engaged in friendly interaction following large proportions of agonistic interactions, whereas non-affiliated individuals, including virtually all male-female pairs, reconciled conflicts rarely. Close-proximity approaching and huddling contact constituted the principal modes of post-conflict amicability. Agonistic interactions of relatively high intensity were most likely to be reconciled and most likely to be reconciled via physical contact. High vulnerability of Saimiri to predation may have favored this species' strong inclination to reconcile soon after agonistic interaction. Research on free-living populations of this and other primate species is needed to illuminate similarities and differences across taxa.  
  Address Department of Biology and Program in Animal Behavior, Bucknell University, Lewisburg, Pennsylvania 17837, USA. mpereira@bucknell.edu  
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  Series Volume Series Issue Edition  
  ISSN 0275-2565 ISBN Medium  
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  Notes PMID:10676712 Approved no  
  Call Number refbase @ user @ Serial 2878  
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Author Hohmann, G.; Fruth, B. doi  openurl
  Title Use and function of genital contacts among female bonobos Type Journal Article
  Year 2000 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 60 Issue 1 Pages 107-120  
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  Abstract Female bonobos, Pan paniscus, show a mounting behaviour that differs physically from that in other primate species. They embrace each other ventroventrally and rub their genital swellings against each other. We investigated five hypotheses on the function of ventroventral mounting (genital contacts) that derive from previous studies of both primate and nonprimate species: (1) reconciliation; (2) mate attraction; (3) tension regulation; (4) expression of social status; and (5) social bonding. We collected data in six field seasons (1993-1998) from members of a habituated, unprovisioned community of wild bonobos at Lomako, Democratic Republic of Congo. No single hypothesis could account for the use of genital contacts, which appeared to be multifunctional. We found support for hypotheses 1 and 3. Rates of postconflict genital contacts exceeded preconflict rates suggesting that the display is used in the context of reconciliation. Rates of genital contacts were high when food could be monopolized and tension was high. However, genital contacts also occurred independently of agonistic encounters. Our study shows rank-related asymmetries in initiation and performance of genital contacts supporting the social status hypothesis: low-ranking females solicited genital contacts more often than high-ranking females while the latter were more often mounter than mountee. Although subordinates took more initiative to achieve genital contact, dominants mostly responded to the solicitation (ventral presentation) with mounting, indicating that the performance benefits both individuals. We suggest that genital contacts can be used to investigate both quality and dynamics of dyadic social relationships among female bonobos. Copyright 2000 The Association for the Study of Animal Behaviour.  
  Address Max Planck Institute of Evolutionary Anthropology, Leipzig  
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  ISSN 0003-3472 ISBN Medium  
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  Notes PMID:10924210 Approved no  
  Call Number refbase @ user @ Serial 2879  
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Author Lanier, J.L.; Grandin, T.; Green, R.D.; Avery, D.; McGee, K. url  openurl
  Title The relationship between reaction to sudden, intermittent movements and sounds and temperament Type Journal Article
  Year 2000 Publication Journal of Animal Science Abbreviated Journal J. Anim Sci.  
  Volume 78 Issue 6 Pages 1467-1474  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2945  
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Author Olesen, I.; Groen, A.F.; Gjerde, B. url  openurl
  Title Definition of animal breeding goals for sustainable production systems Type Journal Article
  Year 2000 Publication Journal of Animal Science Abbreviated Journal J. Anim Sci.  
  Volume 78 Issue 3 Pages 570-582  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2934  
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Author Sprigge, T.L.S. url  openurl
  Title Darwinian Dominion: Animal Welfare and Human Interests: Lewis Petrinovich, Cambridge, Mass, London, England, MIT Press, 1999, ix + 431 pages, {pound}31.50 (hc) Type Journal Article
  Year 2000 Publication J. Med. Ethics Abbreviated Journal  
  Volume 26 Issue 5 Pages 412-  
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  Notes 10.1136/jme.26.5.412 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2958  
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Author Bickerton, D. url  openurl
  Title Resolving Discontinuity: A Minimalist Distinction between Human and Non-human Minds Type Journal Article
  Year 2000 Publication Integr. Comp. Biol. Abbreviated Journal  
  Volume 40 Issue 6 Pages 862-873  
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  Abstract Our genotype is so similar to those of the African apes, and our last common ancestor with them so recent, that it seems impossible that human and non-human cognition should differ qualitatively. But the outputs of human cognition are unique in their limitless creativity and adaptability. Exaption resolves the apparent paradox. Assume that the power to create symbols emerges from stimulus-stimulus linkages and is latent in many animals, and that the structural side of language emerges from the argument structures inherent in the social calculus associated with reciprocal altruism. These adaptations confer the potential for language. However, creating complex messages requires uniquely long-lasting coherence of neural signals, which depends in turn on the large quantities of neurons unique to Homo. The only difference between human and non-human minds is that we can sustain longer and more complex trains of thought. All else (emotions, rational processes, even consciousness) could be exactly the same.  
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  Notes 10.1093/icb/40.6.862 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2966  
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Author Forkman, B. doi  openurl
  Title Domestic hens have declarative representations Type Journal Article
  Year 2000 Publication Animal Cognition Abbreviated Journal Anim. Cogn.  
  Volume 3 Issue 3 Pages 135-137  
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  Abstract It is generally considered that information can be stored either as a procedural or as a declarative representation. A devaluation technique was used to determine whether hens have declarative representations. Individual hens (Gallus gallus domesticus) were fed in an enclosure with two containers, each with a new food type. One of the food types was devalued by pre-feeding with that food, after which the hens were tested with empty food containers. The pre-feeding should only affect the choice of the hens if they have learned where a particular food type was (declarative representation) rather than “go left when coming into the enclosure” (procedural representation). A significant proportion of the hens went to the location previously occupied by the non-devalued food (seven out of eight). This supports the hypothesis that domestic hens can form declarative representations.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3143  
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Author Xia, L.; Siemann, M.; Delius, J.D. doi  openurl
  Title Matching of numerical symbols with number of responses by pigeons Type Journal Article
  Year 2000 Publication Animal Cognition Abbreviated Journal Anim. Cogn.  
  Volume 3 Issue 1 Pages 35-43  
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  Abstract Pigeons were trained to peck a certain number of times on a key that displayed one of several possible numerical symbols. The particular symbol displayed indicated the number of times that the key had to be pecked. The pigeons signalled the completion of the requirement by operating a separate key. They received a food reward for correct response sequences and time-out penalties for incorrect response sequences. In the first experiment nine pigeons learned to allocate 1, 2, 3 or 4 pecks to the corresponding numerosity symbols s1, s2, s3 and s4 with levels of accuracy well above chance. The second experiment explored the maximum set of numerosities that the pigeons were capable of handling concurrently. Six of the pigeons coped with an s1-s5 task and four pigeons even managed an s1-s6 task with performances that were significantly above chance. Analysis of response times suggested that the pigeons were mainly relying on a number-based rather than on a time-based strategy.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3163  
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