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Author Petherick, J.C.; Rutter, S.M. url  doi
openurl 
  Title Quantifying motivation using a computer-controlled push-door Type Journal Article
  Year 1990 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 27 Issue 1 Pages 159-167  
  Keywords  
  Abstract A computer-controlled push-door system was designed and tested as a method for measuring motivation. Eleven domestic hens were trained to use the push-door to gain access to food. They were deprived of food for 12 h or 43 h on 12 occasions and the push-door was used to measure the amount of “work” (measured as force × time) that they performed to gain access to a food reward. When deprived of food for 12 h the hens took significantly longer (P<0.01) to reach the required threshold of work, than when deprived for 43 h. This difference arose from the amount of time that the hens spent not pushing at the door. The problems encountered with this system and such an approach to measuring motivation are discussed.  
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  ISSN 0168-1591 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 6165  
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Author Byrne, R.W.; Whiten, A. openurl 
  Title Tactical deception in primates: the 1990 database Type Book Whole
  Year 1990 Publication Primate Reports Abbreviated Journal Primate Rep.  
  Volume 27 Issue Pages 1-101  
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  Publisher German Primate Center Place of Publication (up) Editor  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 6172  
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Author Tomasello, M. openurl 
  Title Cultural transmission in the tool use and communicatory signalling of chimpanzees? Type Book Chapter
  Year 1990 Publication Language and Intelligence in Monkeys and Apes. Abbreviated Journal  
  Volume Issue Pages 274-311  
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  Publisher Cambridge University Press Place of Publication (up) Cambridge Editor Parker,S.T.;Gibson,K.R.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5267  
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Author Cheney D.L.; Seyfarth, R.M. openurl 
  Title How monkeys see the world: Inside the mind of another species Type Book Whole
  Year 1990 Publication Abbreviated Journal  
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  Publisher University of Chicago Press Place of Publication (up) Chicago Editor  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 706  
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Author Würbel, H. openurl 
  Title The relationship between social structure and mating system in donkeys & Mating strategies of male donkeys in a promiscuous mating system"l structure and mating system in donkeys & Type Manuscript
  Year 1990 Publication Abbreviated Journal  
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  Corporate Author Thesis Diploma thesis  
  Publisher Place of Publication (up) Faculty of Natural Sciences, University of Berne, Switzerland Editor  
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  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1724  
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Author Klingel, H. openurl 
  Title Kalameili – future home of the Przewalski horse? Type Book Chapter
  Year 1990 Publication Proceedings of the 5th International Symposium on the Preservation of the Przewalski Horse, Leipzig Abbreviated Journal  
  Volume Issue Pages 221-224  
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  Publisher Zoolog Garten Place of Publication (up) Leipzig Editor Seifert, S.  
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  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1323  
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Author Schilder, M.B.H. openurl 
  Title Social behaviour and social arganization of a herd of plains zebra in a safari park Type Manuscript
  Year 1990 Publication Abbreviated Journal  
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  Corporate Author Thesis Ph.D. thesis  
  Publisher Place of Publication (up) University of Utrecht Editor  
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  Area Expedition Conference  
  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1566  
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