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Author |
Russon AE; Galdikas BMF |
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Title |
Imitation in free-ranging rehabilitant orangutans (Pongo pygmaeus) |
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1993 |
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J. Comp. Psychol. |
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107 |
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147 |
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Call Number |
Equine Behaviour @ team @ |
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3036 |
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Author |
Tomasello M; Savage-Rumbaugh S; Kruger AC |
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Title |
Imitative learning of actions on objects by children, chimpanzees, and enculturated chimpanzees |
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Year |
1993 |
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Child Dev. |
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64 |
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1688 |
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Equine Behaviour @ team @ |
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3044 |
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Author |
Timberlake, W. |
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Title |
Animal Behavior: A Continuing Synthesis |
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Year |
1993 |
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Annual Review of Psychology |
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44 |
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1 |
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675-706 |
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refbase @ user @ |
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3537 |
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Author |
Lieberman, D. |
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1993 |
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Learning, Behaviour and Cognition, 2nd Ed. |
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Cited By (since 1996): 8; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4525 |
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Author |
Parelli, P. |
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1993 |
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Natural Horsemanship |
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Cited By (since 1996): 5; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4538 |
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Author |
de Waal, F.B.M. |
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Title |
Animal Social Conflict |
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Miscellaneous |
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1993 |
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no |
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Equine Behaviour @ team @ |
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4894 |
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Title |
Wolves in Europe: status and perspectives |
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1993 |
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Munich Wildlife Society |
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Ettal, Germany |
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Call Number |
Equine Behaviour @ team @ ref8 |
Serial |
6449 |
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Author |
Rutberg, A.T.; Keiper, R.R. |
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Title |
Proximate causes of natal dispersal in feral ponies: some sex differences |
Type |
Journal Article |
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Year |
1993 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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46 |
Issue |
5 |
Pages |
969-975 |
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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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no |
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Call Number |
refbase @ user @ |
Serial |
518 |
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Author |
SYLVAIN GAGNON,FRANCOISY. DORE |
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Title |
Search behavior of dogs (Canis familiaris) in invisible displacement problems |
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Journal Article |
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Year |
1993 |
Publication |
Animal Learning & Behavior |
Abbreviated Journal |
Anim Learn. & Behav. |
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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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no |
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Call Number |
refbase @ user @ |
Serial |
538 |
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Author |
Chalmeau, R.; Gallo, A. |
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Title |
Social constraints determine what is learned in the chimpanzee |
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Year |
1993 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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Volume |
28 |
Issue |
3 |
Pages |
173-179 |
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Keywords |
Operant conditioning; Social influence; Individual strategy; Chimpanzee |
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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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refbase @ user @ |
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569 |
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