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Author Lieberman, D. openurl 
  Title Type Book Whole
  Year 1993 Publication Learning, Behaviour and Cognition, 2nd Ed. Abbreviated Journal  
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  Notes Cited By (since 1996): 8; Export Date: 21 October 2008 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4525  
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Author Parelli, P. openurl 
  Title Type Book Whole
  Year 1993 Publication Natural Horsemanship Abbreviated Journal  
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  Notes Cited By (since 1996): 5; Export Date: 21 October 2008 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4538  
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Author de Waal, F.B.M. openurl 
  Title Animal Social Conflict Type Miscellaneous
  Year 1993 Publication Abbreviated Journal  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 4894  
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Author openurl 
  Title Wolves in Europe: status and perspectives Type Book Whole
  Year 1993 Publication Abbreviated Journal  
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  Publisher Munich Wildlife Society Place of Publication Ettal, Germany Editor (up)  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ ref8 Serial 6449  
Permanent link to this record
 
 
Author Rutberg, A.T.; Keiper, R.R. url  doi
openurl 
  Title Proximate causes of natal dispersal in feral ponies: some sex differences Type Journal Article
  Year 1993 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 46 Issue 5 Pages 969-975  
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  Abstract Abstract. Fifteen years of data on natal dispersal age and the context of dispersal for the feral ponies of Assateague Island, Maryland are presented. Ninety-seven per cent of males and 81% of females dispersed from their natal groups by 5 years of age. For animals that left their natal group, average age of dispersal was 20[middle dot]8 months for males and 24[middle dot]6 months for females. Male dispersal age was strongly and significantly correlated with number of peers in the natal group, and males dispersing with peers were significantly older than males dispersing without peers, suggesting that males delayed dispersal when peers were available for interaction. Female dispersal age was not influenced by number of peers, but was correlated with age of first reproduction. Factors not influencing dispersal age in either sex were presence of a younger sibling, maternal band transfers, and maternal age and dominance rank. The relatively high frequency of females failing to disperse from their natal groups is puzzling in light of data showing diminished fecundity in non-dispersing pony mares.  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 518  
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Author SYLVAIN GAGNON,FRANCOISY. DORE openurl 
  Title Search behavior of dogs (Canis familiaris) in invisible displacement problems Type Journal Article
  Year 1993 Publication Animal Learning & Behavior Abbreviated Journal Anim Learn. & Behav.  
  Volume 21 Issue 3 Pages 246-254  
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  Abstract Gagnon and Dor (1992) showed that domestic dogs are able to solve a Piagetian object permanence

task called the invisible displacement problem. A toy is hidden in a container which is

moved behind a screen where the toy is removed and left. Dogs make more errors in these problems

than they do in visible displacement tests, in which the object is hidden directly behind

the target screen. In Experiment 1, we examinedcomponents ofthe standard procedure of invisible

displacements that may make encoding or retention of the hiding location more difficult than

it is in visible displacements. In Experiment 2, we compared dogs performances in visible and

invisible displacement problems when delays of 0, 10, and 20 sec were introduced between the

objects final disappearance and the subjects release. The results revealed that dogs poorer performance

in invisible displacement tests is related to the complex sequence of events that have

to be encoded or remembered as well as to a difficulty in representing the position change that

is signaled, but not directly perceived.		  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 538  
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Author Chalmeau, R.; Gallo, A. url  doi
openurl 
  Title Social constraints determine what is learned in the chimpanzee Type Journal Article
  Year 1993 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 28 Issue 3 Pages 173-179  
  Keywords Operant conditioning; Social influence; Individual strategy; Chimpanzee  
  Abstract A group of six chimpanzees was placed in a social learning situation, without training. The learning task was an operant conditioning situation; that is, a subject had to pull two handles simultaneously to cause a piece of fruit to fall into the cage. Only three individuals acquired the operant behaviour. For the operant individuals, social influences on the expression of the learning task were then examined; the dominant chimpanzee during feeding had an inhibiting effect when close to the operant subjects. Depending on the subject, social factors may influence not only the specific expression of what is learnt, but also the nature of what is learnt. Chimpanzees appear to experience situations differently: they develop an individual problem-solving strategy according to their social relationships even if the experimental procedure is the same for all.  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 569  
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Author RÖHRS, M.; EBINGER, P. openurl 
  Title Progressive und regressive Hirngrößenveränderungen bei Equiden Type Journal Article
  Year 1993 Publication Abbreviated Journal Z zool Syst Evolut forsch  
  Volume 31 Issue Pages 233-239  
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  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1513  
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Author Schuhmann K, openurl 
  Title Untersuchung zur Sozialstruktur des persischen Wildesels Type Manuscript
  Year 1993 Publication Abbreviated Journal  
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  Corporate Author Thesis Doctoral thesis  
  Publisher Place of Publication Freiburg Editor (up)  
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  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1578  
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Author Shah Nv, openurl 
  Title Ecology of wild ass in Little Rann of Kutch Type Manuscript
  Year 1993 Publication Abbreviated Journal  
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  Corporate Author Thesis Doctoral thesis  
  Publisher Place of Publication Baroda University, India. Editor (up)  
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  Area Expedition Conference  
  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1587  
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