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Author (down) Zeuner Fe, openurl 
  Title Das Pferd Type Journal Article
  Year 1967 Publication Abbreviated Journal In Zeuner; Geschichte der Haustiere  
  Volume Issue Pages 254-287  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1754  
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Author (down) Zeuner Fe, openurl 
  Title Der Halbesel Type Book Chapter
  Year 1967 Publication Abbreviated Journal In: Zeuner; Geschichte der Haustiere  
  Volume Issue Pages 311-316  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1755  
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Author (down) Zeuner Fe, openurl 
  Title Esel und Maultier Type Book Chapter
  Year 1967 Publication Abbreviated Journal In: Zeuner; Geschichte der Haustiere  
  Volume Issue Pages 316-324  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1756  
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Author (down) Zervanos Sm, K.R. openurl 
  Title Seasonal home ranges and activity patterns of feral assateague island ponies Type Conference Volume
  Year 1979 Publication Symposium on the Ecology and Behavior of wild and feral Equids, Laramie Abbreviated Journal  
  Volume Issue Pages 3-14  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1753  
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Author (down) Zenzinger, S. url  doi
openurl 
  Title Experimentelle Untersuchungen zur optischen Kommunikation bei im Zoo gehaltenen Schabracken- und Flachlandtapiren (Tapirus indicus und Tapirus terrestris) Type Journal Article
  Year 2010 Publication Der Zoologische Garten Abbreviated Journal  
  Volume 79 Issue 4-5 Pages 162-174  
  Keywords Tapirus indicus; Tapirus terrestris; communication; optical stimuli; posters; white ear rims; key stimulus  
  Abstract Until now, unlike their relatives, rhinos and horses tapirs have received considerably less attention in studies about communication. Therefore, it was the aim of this study to test which stimuli contain optical information for tapirs. For this purpose, the reactions of tapirs on optical stimuli (posters with edited tapir silhouettes) were examined. Research visits took place at the zoos of Berlin, Dortmund, Heidelberg, Munich, Nuremberg and Osnabrück during the year 2006. A total of 23 individuals, thereof 8 (5.3) Malayan tapirs (Tapirus indicus) and 15 (5.10) Lowland tapirs (Tapirus terrestris) attended the experiment. The results of the optical test with variously intense edited tapir silhouettes speak for the importance of the white ear rims as a family specific key stimulus. But that effect could not be amplified by adding a greater extent of white to the silhouette. Tapirs of both species reacted most strongly to the normal tapir silhouette followed by a silhouette without proboscis.  
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  ISSN 0044-5169 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5321  
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Author (down) Zentall, T.R; Hogan, D.E. doi  openurl
  Title Key pecking in pigeons produced by pairing keylight with inaccessible grain Type Journal Article
  Year 1975 Publication Abbreviated Journal J Exp Anal Behav  
  Volume 23 Issue 2 Pages 199-206  
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  Abstract In Experiment I, keylight was paired with inaccessible grain delivery (under two conditions of keylight intensity) to determine if autoshaping would occur in the absence of primary reinforcement. In Experiment II, the procedure was repeated with accessible grain, for comparison. In Experiment III, the procedures were repeated with explicitly unpaired presentations of keylight and either inaccessible or accessible grain. The results indicated that key pecking occurred as quickly in the presence of keylight pairings with inaccessible grain as with accessible grain, though (except for one bird) key pecking was not maintained with inaccessible grain. Furthermore, compared to the dim keylight, the bright keylight greatly suppressed key pecking when paired with inaccessible grain, and reduced the rate of key pecking when paired with accessible grain. Little key pecking occurred in groups exposed to explicitly unpaired presentations of keylight (whether bright or dim) and grain (whether accessible or inaccessible). When the birds in Experiment III were retested with explicitly paired presentations of keylight and grain, little key pecking was observed, suggesting suppressive effects of prior explicitly unpaired presentations. It is suggested that the effects of key-brightness manipulation were produced by the association of grain with cues other than the response key, or by distraction produced by partial illumination of the grain hopper.  
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  ISSN 0022-5002 ISBN Medium  
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  Notes PMID:16811840 Approved no  
  Call Number refbase @ user @ Serial 273  
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Author (down) Zentall, T.R.;Hogan, D.E.. doi  openurl
  Title Same/different concept learning in the pigeon: the effect of negative instances and prior adaptation to transfer stimuli Type Journal Article
  Year 1978 Publication Abbreviated Journal J Exp Anal Behav  
  Volume 30 Issue 2 Pages 177-186  
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  Abstract Pigeons were trained on a matching-to-sample or oddity-from-sample task with shapes (circle and plus). Half of each group was exposed to “negative instance” trials i.e., for matching birds, neither comparison key matched the sample, and for oddity birds both comparison keys matched the sample. When all birds were transferred to a new task involving colors (red and green), nonshifted birds (transferred from matching to matching, or oddity to oddity) performed significantly better than shifted birds (transferred from matching to oddity, or oddity to matching), but only if they had experienced negative instances of the training concept. When all birds were exposed to negative instances of the transfer task and then transferred to a new color task (yellow and blue), dramatic transfer effects were observed. The effect of pre-exposure to the yellow and blue colors, in order to reduce transfer-stimulus novelty, had a minor effect on transfer.  
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  ISSN 0022-5002 ISBN Medium  
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  Notes PMID:16812097 Approved no  
  Call Number refbase @ user @ Serial 271  
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Author (down) Zentall, T.R.; Weaver, J.E.; Clement, T.S. openurl 
  Title Pigeons group time intervals according to their relative duration Type Journal Article
  Year 2004 Publication Psychonomic bulletin & review Abbreviated Journal Psychon Bull Rev  
  Volume 11 Issue 1 Pages 113-117  
  Keywords Animals; Columbidae; *Discrimination (Psychology); Reinforcement (Psychology); Time Factors; Time Perception  
  Abstract In the present research, we asked whether pigeons tended to judge time intervals not only in terms of their absolute value but also relative to a duration from which they must be discriminated (i.e., longer or shorter). Pigeons were trained on two independent temporal discriminations. In one discrimination, sample durations of 2 and 8 sec were associated with, for example, red and green hue comparisons, respectively, and in the other discrimination, sample durations of 4 and 16 sec were associated with vertical and horizontal line comparisons, respectively. If pigeons are trained on a temporal discrimination and tested with intermediate durations, the subjective midpoint typically occurs close to the geometric mean of the two trained values. The 4- and 8-sec values were selected to be the geometric mean of the two values in the other discrimination. When a 4-sec test sample was presented with the comparisons from the 2- and 8-sec discrimination, the pigeons preferred the comparison associated with the shorter sample. Similarly, when an 8-sec test sample was presented with the comparisons from the 4- and 16-sec discrimination, the pigeons preferred the comparison associated with the longer sample. Thus, a relative grouping effect was found. That is, durations that should have produced indifferent choice were influenced by their relative durations (shorter than or longer than the alternative) during training.  
  Address Department of Psychology, University of Kentucky, Lexington, Kentucky 40506-0044, USA. zentall@pop.uky.edu  
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  Series Volume Series Issue Edition  
  ISSN 1069-9384 ISBN Medium  
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  Notes PMID:15116995 Approved no  
  Call Number refbase @ user @ Serial 231  
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Author (down) Zentall, T.R.; Sutton, J.E.; Sherburne, L.M. url  doi
openurl 
  Title True imitative learning in pigeons Type Journal Article
  Year 1996 Publication Psychol Sci Abbreviated Journal  
  Volume 7 Issue Pages  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Zentall1996 Serial 6292  
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Author (down) Zentall, T.R.; Sutton, J.E.; Sherburne, L.M. url  doi
openurl 
  Title True imitative learning in pigeons Type Journal Article
  Year 1996 Publication Psychol Sci Abbreviated Journal  
  Volume 7 Issue Pages  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Zentall1996 Serial 6372  
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