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Author Werhahn, H.; Hessel, E.F.; Van den Weghe, H.F.A. url  doi
openurl 
  Title (up) Competition Horses Housed in Single Stalls (II): Effects of Free Exercise on the Behavior in the Stable, the Behavior during Training, and the Degree of Stress Type Journal Article
  Year 2012 Publication Journal of Equine Veterinary Science Abbreviated Journal  
  Volume 32 Issue 1 Pages 22-31  
  Keywords Horse; Turnout; Single stall; Behavior; Hrv  
  Abstract Although housing horses in single stalls limits their natural behavior to a great extent, this housing system is widespread in Germany, especially for competition horses. To improve the welfare of this system, free exercise on pastures or paddocks is deemed suitable, but it is also feared because of injuries and decreased willingness or motivation to perform. In the present study, three treatments were investigated with regard to their effect on the behavior of six competition horses in the stable, behavior during training, and on their degree of stress: daily training without free exercise (no turnout [NT]), solitary turnout for 2 hours after training, and 2-hour turnout in groups of two after training (group turnout). The horses' behavior in the stable was continuously analyzed through video recordings (2 pm to 6 am) on 3 days at the end of each treatment. The degree of stress was evaluated daily by heart rate variability at rest. The behavior during training was evaluated by a questionnaire answered by the riders, and the distance covered during training was measured by global positioning system. When NT was allowed, the horses showed less lying in the stable compared with the treatments with turnout. Heart rate variability measurements resulted in great individual differences, but generally, there was a higher degree of stress shown with the treatment NT according to the following parameters: standard deviation of inter-beat-intervals (SDNN), square root of the mean of the sum of the squares of differences between successive inter-beat-intervals (RMSSD), and ratio between low frequency and high frequency (LF/HF). The willingness to perform was evaluated as being slightly better in the treatments with turnout than in the treatment without turnout.  
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  ISSN 0737-0806 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 6626  
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Author Treichler, F.R.; Van Tilburg, D. url  doi
openurl 
  Title (up) Concurrent Conditional Discrimination Tests of Transitive Inference by Macaque Monkeys: List Linking Type Journal Article
  Year 1996 Publication Journal of Experimental Psychology: Animal Behavior Processes Abbreviated Journal J Exp Psychol Anim Behav Process  
  Volume 22 Issue 1 Pages 105-117  
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  Abstract Processing of serial information was assessed by training six macaques on a five-item list of objects arranged into the four conditional pairs, A-B+, B-C+, C-D+, and D-E+. An analogous list (F through J) was similarly trained. Subsequently, both lists were linked by training on E-F+, a pair that provided adjacent elements from each list. Then, all unique and trained object pairs from both lists were presented as a test. Results indicated that the objects were retained as a single, linearly organized list with choice accuracy directly related to interitem distance between paired objects. A second experiment explored the consequences of incidence of conflicting information on list organization. In both experiments, selections depended on representational processes and supported the view that monkeys and pigeons retain serial lists in qualitatively different ways.  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 718  
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Author Langbein, J.; Siebert, K.; Nuernberg, G. url  doi
openurl 
  Title (up) Concurrent recall of serially learned visual discrimination problems in dwarf goats (Capra hircus) Type Journal Article
  Year 2008 Publication Behav Proc Abbreviated Journal  
  Volume 79 Issue Pages  
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  Call Number Equine Behaviour @ team @ Langbein2008 Serial 6363  
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Author König, H.E.; Wissdorf, H.; Probst, A.; Macher, R.; Voß, S.; Polsterer, E. url  openurl
  Title (up) Considerations about the function of the mimic muscles and the vomeronasal organ of horses during the Flehmen reaction Type Journal Article
  Year 2005 Publication Pferdeheilkunde Abbreviated Journal  
  Volume 21 Issue 4 Pages 297-300  
  Keywords Anatomy; Behaviour; Flehmen reaction; Horse; Vomeronasal organ  
  Abstract Additional to the olfactory epithelium, the equine vomeronasal organ serves to the perception of odorous substances and specially for pheromones. In a middle-size horse this organ has an extension in length from an imaginary transverse plane about 10 cm caudally the nostrils to a transverse plane through the middle of the second premolar tooth. During the Flehmen reaction the levator labii superior, nasolabial, caninus and lateralis nasi muscles contract. The upper lip and the tip of the nose are lifted. The opening of the nostrils is narrowed, caused by the convergence of the plate and horn of the alar cartilage. In this manner in case of Flehmen reaction air is directly conducted towards the opening of the vomeronasal organ into the nasal cavity during inspiration. During the “Flehmen” horses assume a characteristic posture.  
  Address Department für Pathobiologie (Institut für Anatomie), Veterinärmedizinische Universität Wien, Veterinärplatz 1, A-1210 Wien, Austria  
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  Notes Export Date: 21 October 2008; Source: Scopus Approved yes  
  Call Number Equine Behaviour @ team @ Serial 4554  
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Author Stanley, C.R.; Dunbar, R.I.M. url  doi
openurl 
  Title (up) Consistent social structure and optimal clique size revealed by social network analysis of feral goats, Capra hircus Type Journal Article
  Year 2013 Publication Anim Behav Abbreviated Journal  
  Volume 85 Issue Pages  
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  Call Number Equine Behaviour @ team @ Stanley2013 Serial 6253  
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Author van de Waal, E.; Bshary, R. url  doi
openurl 
  Title (up) Contact with human facilities appears to enhance technical skills in wild vervet monkeys (Chlorocebus aethiops) Type Journal Article
  Year 2010 Publication Folia Primatol Abbreviated Journal  
  Volume 81 Issue Pages  
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  Call Number Equine Behaviour @ team @ van de Waal2010 Serial 6265  
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Author Van Horik, J.; Clayton, N.; Emery, N. openurl 
  Title (up) Convergent evolution of cognition in Corvids, Apes and other animals Type Book Chapter
  Year 2012 Publication Oxford Handbook of Comparative Evolutionary Psychology Abbreviated Journal  
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  Publisher Oxford University Press Place of Publication New York Editor Vonk, J.; Shackelford, T.  
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  Call Number Equine Behaviour @ team @ Van Horik2012 Serial 6284  
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Author Smolla, M.; Alem, S.; Chittka, L.; Shultz, S. url  doi
openurl 
  Title (up) Copy-when-uncertain: bumblebees rely on social information when rewards are highly variable Type Journal Article
  Year 2016 Publication Biology letters Abbreviated Journal Biol. Lett.  
  Volume 12 Issue 6 Pages  
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  Abstract To understand the relative benefits of social and personal information use in foraging decisions, we developed an agent-based model of social learning that predicts social information should be more adaptive where resources are highly variable and personal information where resources vary little. We tested our predictions with bumblebees and found that foragers relied more on social information when resources were variable than when they were not. We then investigated whether socially salient cues are used preferentially over non-social ones in variable environments. Although bees clearly used social cues in highly variable environments, under the same conditions they did not use non-social cues. These results suggest that bumblebees use a 'copy-when-uncertain' strategy.  
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  Call Number Equine Behaviour @ team @ Serial 6198  
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Author Becker-Birck, M.; Schmidt, A.; Wulf, M.; Aurich, J.; von der Wense, A.; Möstl, E.; Berz, R.; Aurich, C. url  doi
openurl 
  Title (up) Cortisol release, heart rate and heart rate variability, and superficial body temperature, in horses lunged either with hyperflexion of the neck or with an extended head and neck position Type Journal Article
  Year 2013 Publication Journal of Animal Physiology and Animal Nutrition Abbreviated Journal  
  Volume 97 Issue 2 Pages 322-330  
  Keywords animal welfare; equitation; stress; training  
  Abstract Bringing the head and neck of ridden horses into a position of hyperflexion is widely used in equestrian sports. In our study, the hypothesis was tested that hyperflexion is an acute stressor for horses. Salivary cortisol concentrations, heart rate, heart rate variability (HRV) and superficial body temperature were determined in horses (n = 16) lunged on two subsequent days. The head and neck of the horse was fixed with side reins in a position allowing forward extension on day A and fixed in hyperflexion on day B. The order of treatments alternated between horses. In response to lunging, cortisol concentration increased (day A from 0.73 ± 0.06 to 1.41 ± 0.13 ng/ml, p < 0.001; day B from 0.68 ± 0.07 to 1.38 ± 0.13 ng/ml, p < 0.001) but did not differ between days A and B. Beat-to-beat (RR) interval decreased in response to lunging on both days. HRV variables standard deviation of RR interval (SDRR) and RMSSD (root mean square of successive RR differences) decreased (p < 0.001) but did not differ between days. In the cranial region of the neck, the difference between maximum and minimum temperature was increased in hyperflexion (p < 0.01). In conclusion, physiological parameters do not indicate an acute stress response to hyperflexion of the head alone in horses lunged at moderate speed and not touched with the whip. However, if hyperflexion is combined with active intervention of a rider, a stressful experience for the horse cannot be excluded.  
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  Publisher Blackwell Publishing Ltd Place of Publication Editor  
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  ISSN 1439-0396 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 6182  
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Author Healy, S.D.; Rowe, C. url  doi
openurl 
  Title (up) Costs and benefits of evolving a larger brain: doubts over the evidence that large brains lead to better cognition Type Journal Article
  Year 2013 Publication Anim Behav Abbreviated Journal  
  Volume 86 Issue Pages  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Healy2013 Serial 6317  
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