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Author Matsuzawa, T. openurl 
  Title Use of numbers by a chimpanzee Type Journal Article
  Year 1985 Publication Nature Abbreviated Journal (up) Nature  
  Volume 315 Issue 6014 Pages 57-59  
  Keywords Animals; Behavior, Animal/physiology; Cognition; Female; Mathematics; Pan troglodytes/*physiology  
  Abstract Recent studies have examined linguistic abilities in apes. However, although human mathematical abilities seem to be derived from the same foundation as those in language, we have little evidence for mathematical abilities in apes (but for exceptions see refs 7-10). In the present study, a 5-yr-old female chimpanzee (Pan troglodytes), 'Ai', was trained to use Arabic numerals to name the number of items in a display. Ai mastered numerical naming from one to six and was able to name the number, colour and object of 300 types of samples. Although no particular sequence of describing samples was required, the chimpanzee favoured two sequences (colour/object/number and object/colour/number). The present study demonstrates that the chimpanzee was able to describe the three attributes of the sample items and spontaneously organized the 'word order'.  
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  ISSN 0028-0836 ISBN Medium  
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  Notes PMID:3990808 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2793  
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Author McGonigle, B. openurl 
  Title Can apes learn to count? Type
  Year 1985 Publication Nature Abbreviated Journal (up) Nature  
  Volume 315 Issue 6014 Pages 16-17  
  Keywords Animals; Behavior, Animal/physiology; Cognition; Pan troglodytes/*physiology  
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  Language English Summary Language Original Title  
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  ISSN 0028-0836 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:3990806 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2794  
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Author Crook, J.H. openurl 
  Title On attributing consciousness to animals Type Journal Article
  Year 1983 Publication Nature Abbreviated Journal (up) Nature  
  Volume 303 Issue 5912 Pages 11-14  
  Keywords Animals; *Behavior, Animal; Cognition; *Consciousness; Evolution; Learning  
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  Series Volume Series Issue Edition  
  ISSN 0028-0836 ISBN Medium  
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  Notes PMID:6843653 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2795  
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Author Goodall J openurl 
  Title Tool-using and aimed throwing in a community of free-living chimpanzees Type Journal Article
  Year 1964 Publication Nature Abbreviated Journal (up) Nature  
  Volume 201 Issue Pages 1264  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3000  
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Author Sugiyama Y openurl 
  Title Tool use by wild chimpanzees Type Journal Article
  Year 1994 Publication Nature Abbreviated Journal (up) Nature  
  Volume 376 Issue Pages 327  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3041  
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Author Novacek, M.J. doi  openurl
  Title Mammalian phylogeny: shaking the tree Type Journal Article
  Year 1992 Publication Nature Abbreviated Journal (up) Nature  
  Volume 356 Issue 6365 Pages 121-125  
  Keywords Animals; Evolution; Fossils; Mammals/classification/*genetics; *Phylogeny  
  Abstract Recent palaeontological discoveries and the correspondence between molecular and morphological results provide fresh insight on the deep structure of mammalian phylogeny. This new wave of research, however, has yet to resolve some important issues.  
  Address American Museum of Natural History, New York 10024  
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  ISSN 0028-0836 ISBN Medium  
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  Notes PMID:1545862 Approved no  
  Call Number Equine Behaviour @ team @ Serial 3546  
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Author Wolf, M.; van Doorn, G.S.; Leimar, O.; Weissing, F.J. doi  openurl
  Title Life-history trade-offs favour the evolution of animal personalities Type Journal Article
  Year 2007 Publication Nature Abbreviated Journal (up) Nature  
  Volume 447 Issue 7144 Pages 581-584  
  Keywords Aggression/physiology/psychology; Animals; Behavior, Animal/*physiology; *Evolution; Exploratory Behavior/physiology; Models, Biological; Personality/*physiology; Predatory Behavior/physiology; Reproduction/physiology; Risk-Taking; Selection (Genetics)  
  Abstract In recent years evidence has been accumulating that personalities are not only found in humans but also in a wide range of other animal species. Individuals differ consistently in their behavioural tendencies and the behaviour in one context is correlated with the behaviour in multiple other contexts. From an adaptive perspective, the evolution of animal personalities is still a mystery, because a more flexible structure of behaviour should provide a selective advantage. Accordingly, many researchers view personalities as resulting from constraints imposed by the architecture of behaviour (but see ref. 12). In contrast, we show here that animal personalities can be given an adaptive explanation. Our argument is based on the insight that the trade-off between current and future reproduction often results in polymorphic populations in which some individuals put more emphasis on future fitness returns than others. Life-history theory predicts that such differences in fitness expectations should result in systematic differences in risk-taking behaviour. Individuals with high future expectations (who have much to lose) should be more risk-averse than individuals with low expectations. This applies to all kinds of risky situations, so individuals should consistently differ in their behaviour. By means of an evolutionary model we demonstrate that this basic principle results in the evolution of animal personalities. It simultaneously explains the coexistence of behavioural types, the consistency of behaviour through time and the structure of behavioural correlations across contexts. Moreover, it explains the common finding that explorative behaviour and risk-related traits like boldness and aggressiveness are common characteristics of animal personalities.  
  Address Theoretical Biology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands  
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  Series Volume Series Issue Edition  
  ISSN 1476-4687 ISBN Medium  
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  Notes PMID:17538618 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4098  
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Author Bell, A.M. doi  openurl
  Title Evolutionary biology: animal personalities Type
  Year 2007 Publication Nature Abbreviated Journal (up) Nature  
  Volume 447 Issue 7144 Pages 539-540  
  Keywords Aggression/physiology/psychology; Animals; Behavior, Animal/*physiology; *Evolution; Humans; *Models, Biological; Personality/genetics/*physiology; Reproduction/genetics/physiology; Risk-Taking; Selection (Genetics)  
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  ISSN 1476-4687 ISBN Medium  
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  Notes PMID:17538607 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4099  
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Author Berger, J. openurl 
  Title Induced abortion and social factors in wild horses Type Journal Article
  Year 1983 Publication Nature Abbreviated Journal (up) Nature  
  Volume 303 Issue 5912 Pages 59-61  
  Keywords Abortion, Induced/*veterinary; Abortion, Veterinary/*etiology; Aggression/physiology; Animals; Evolution; Female; Horses/*physiology; Humans; Pregnancy; Sexual Behavior, Animal/*physiology  
  Abstract Much evidence now suggests that the postnatal killing of young in primates and carnivores, and induced abortions in some rodents, are evolved traits exerting strong selective pressures on adult male and female behaviour. Among ungulates it is perplexing that either no species have developed convergent tactics or that these behaviours are not reported, especially as ungulates have social systems similar to those of members of the above groups. Only in captive horses (Equus caballus) has infant killing been reported. It has been estimated that 40,000 wild horses live in remote areas of the Great Basin Desert of North America (US Department of Interior (Bureau of Land Management), unpublished report), where they occur in harems (females and young) defended by males. Here I present evidence that, rather than killing infants directly, invading males induce abortions in females unprotected by their resident stallions and these females are then inseminated by the new males.  
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  Notes PMID:6682487 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4365  
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Author Franks, N.R.; Richardson, T. url  doi
openurl 
  Title Teaching in tandem-running ants Type Journal Article
  Year 2006 Publication Nature Abbreviated Journal (up) Nature  
  Volume 439 Issue 7073 Pages 153  
  Keywords *Animal Communication; Animals; Ants/*physiology; Feedback/physiology; Learning/*physiology; *Teaching  
  Abstract The ant Temnothorax albipennis uses a technique known as tandem running to lead another ant from the nest to food--with signals between the two ants controlling both the speed and course of the run. Here we analyse the results of this communication and show that tandem running is an example of teaching, to our knowledge the first in a non-human animal, that involves bidirectional feedback between teacher and pupil. This behaviour indicates that it could be the value of information, rather than the constraint of brain size, that has influenced the evolution of teaching.  
  Address School of Biological Sciences, University of Bristol, Bristol BS8 IUG, UK. nigel.franks@bristol.ac.uk  
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  ISSN 1476-4687 ISBN Medium  
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  Notes PMID:16407943 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4651  
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