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Author Voigtlaender-Schnabel, S.; Vogel, L.; Greiner, B.; Wiezorek, S.; Schuette, P.; Solmsen, E.-H.; Martin; H.; Hempel, E.; Gruentjens, T.; Bathen, M.; Herold, P.; Krueger, K. openurl 
  Title Reactions of horses to wildlife and livestock guarding dogs Type Journal Article
  Year 2022 Publication Carnivore Damage Prevention News Abbreviated Journal CDPNews  
  Volume 24 Issue Pages 49-58  
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  Call Number (up) Equine Behaviour @ team @ Serial 6668  
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Author Solmsen, E. - H.; Bathen, M.; Grüntjens, T.; Hempel, E.; Klose, M.; Krüger, K.; Martin, H.; Meyer, A.; Schütte, P.; Vogel, L.; Wiezorek, S.; Wittor, B. openurl 
  Title Protecting horses against wolves in Germany. Type Journal Article
  Year 2021 Publication Carnivore Damage Prevention News Abbreviated Journal CDPNews  
  Volume 23 Issue Pages  
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  Call Number (up) Equine Behaviour @ team @ Serial 6682  
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Author Martin, T.I.; Zentall, T.R. doi  openurl
  Title Post-choice information processing by pigeons Type Journal Article
  Year 2005 Publication Animal cognition Abbreviated Journal Anim. Cogn.  
  Volume 8 Issue 4 Pages 273-278  
  Keywords Animals; *Behavior, Animal; *Choice Behavior; *Columbidae; Discrimination Learning  
  Abstract In a conditional discrimination (matching-to-sample), a sample is followed by two comparison stimuli, one of which is correct, depending on the sample. Evidence from previous research suggests that if the stimulus display is maintained following an incorrect response (the so-called penalty-time procedure), acquisition by pigeons is facilitated. The present research tested the hypothesis that the penalty-time procedure allows the pigeons to review and learn from the maintained stimulus display following an incorrect choice. It did so by including a penalty-time group for which, following an incorrect choice, the sample changed to match the incorrect comparison, thus providing the pigeons with post-choice 'misinformation.' This misinformation group acquired the matching task significantly slower than the standard penalty-time group (that had no change in the sample following an error). Furthermore, acquisition of matching by a control group that received no penalty time fell midway between the other two groups, suggesting that the pigeons did not merely take more care in making choices because of the aversiveness of penalty-time. Thus, it appears that in the acquisition of matching-to-sample, when the stimulus display is maintained following an incorrect choice, the pigeons can review or acquire information from the display. This is the first time that such an effect has been reported for a nonhuman species.  
  Address Department of Psychology, University of Kentucky, Lexington, KY 40506, USA  
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  ISSN 1435-9448 ISBN Medium  
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  Notes PMID:15744507 Approved no  
  Call Number (up) refbase @ user @ Serial 225  
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Author Martin, T.I.; Zentall, T.R.; Lawrence, L. url  doi
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  Title Simple discrimination reversals in the domestic horse (Equus caballus): Effect of discriminative stimulus modality on learning to learn Type Journal Article
  Year 2006 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 101 Issue 3-4 Pages 328-338  
  Keywords Horse; Learning-to-learn; Discrimination Reversal  
  Abstract The cognitive capacity of an organism, relative to that of other species, can be assessed by using a relative measure of learning. One such measure is the ability of an organism to learn about the reversal of a discrimination. The present study compared the performance of two groups of horses on a simple discrimination reversal task when the only difference between the groups was the modality of the relevant cue. For the visual group (absence or presence of a light), the spatial position was irrelevant. For the spatial group, a spatial cue (left/right) was available and the visual cue was irrelevant. Horses in the spatial group learned the original discrimination and six reversals; they also showed evidence of learning to learn. Horses in the visual group did not reach criterion during the study. As a result, there was no evidence of learning to learn.  
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  Call Number (up) refbase @ user @ Serial 289  
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Author Chase, I.D.; Tovey, C.; Spangler-Martin, D.; Manfredonia, M. doi  openurl
  Title Individual differences versus social dynamics in the formation of animal dominance hierarchies Type Journal Article
  Year 2002 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc. Natl. Acad. Sci. U.S.A.  
  Volume 99 Issue 8 Pages 5744-5749  
  Keywords Animals; *Behavior, Animal; Fishes; Humans; *Social Behavior; *Social Dominance  
  Abstract Linear hierarchies, the classical pecking-order structures, are formed readily in both nature and the laboratory in a great range of species including humans. However, the probability of getting linear structures by chance alone is quite low. In this paper we investigate the two hypotheses that are proposed most often to explain linear hierarchies: they are predetermined by differences in the attributes of animals, or they are produced by the dynamics of social interaction, i.e., they are self-organizing. We evaluate these hypotheses using cichlid fish as model animals, and although differences in attributes play a significant part, we find that social interaction is necessary for high proportions of groups with linear hierarchies. Our results suggest that dominance hierarchy formation is a much richer and more complex phenomenon than previously thought, and we explore the implications of these results for evolutionary biology, the social sciences, and the use of animal models in understanding human social organization.  
  Address Department of Sociology, State University of New York, Stony Brook, NY 11794-4356, USA. Ichase@notes.cc.sunysb.edu  
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  ISSN 0027-8424 ISBN Medium  
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  Notes PMID:11960030 Approved no  
  Call Number (up) refbase @ user @ Serial 442  
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Author Houpt, K.A.; Law, K.; Martinisi, V. url  doi
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  Title Dominance hierarchies in domestic horses Type Journal Article
  Year 1978 Publication Applied Animal Ethology Abbreviated Journal Appl. Animal. Ethol.  
  Volume 4 Issue 3 Pages 273-283  
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  Abstract Dominance hierarchies were studied in 11 herds of domestic horses and ponies (Equus caballus). A paired feeding test was utilized to establish the dominance--subordination relationship between each pair of animals in a herd. Aggressive actions, threats, bites, kicks and chases were also recorded. In small herds linear hierarchies were formed, but in large herds triangular relationships were observed. Aggression was correlated with dominance rank. Body weight, but not age, appear to affect rank in the equine hierarchy. Juvenile horses were more likely to share feed with each other than were adult horses and were usually subordinate to adult horses. The daughters of a dominant mare were dominant within their own herds.  
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  Call Number (up) refbase @ user @ Serial 682  
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Author Lloyd, A.S.; Martin, J.E.; Bornett-Gauci, H.L.I.; Wilkinson, R.G. url  doi
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  Title Evaluation of a novel method of horse personality assessment: Rater-agreement and links to behaviour Type Journal Article
  Year 2007 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 105 Issue 1-3 Pages 205-222  
  Keywords Personality; Horse; Individual differences; Behaviour; Reliability  
  Abstract The efficacy of questionnaire-based personality assessment has been shown in a variety of animal and human personality studies. There has been a recent increase in questionnaire-based studies focussing on equine personality but with a lack of comparability to studies on other species. The aim of this study was to test the reliability of an assessment method originally developed for primates and demonstrate reliability using three criteria (1) assessments by independent observers must agree with one another, (2) these assessments must predict behaviours and real-world outcomes and (3) observer ratings must be shown to reflect genuine attributes of the individuals rated, not merely the observer's implicit personality theories about how traits co-vary. The personality of 61 horses (Equus caballus) was assessed using a questionnaire constructed of 30 behaviourally defined adjectives (BDAs). Horses were each assessed by three judges, in addition to a total of 2 h behaviour observations recorded per horse. Rater agreement was demonstrated for 72.1% of the horses and 25 of the BDAs. Principal component analysis was carried out on the rating data and revealed six underlying personality components that were labelled “dominance”, “anxiousness”, “excitability”, “protection”, “sociability” and “inquisitiveness”. Component scores for horses were correlated against behavioural observations for the same horses and revealed significant correlations with 20 of the recorded behaviour variables. Correlations between specific components and their associated behaviours were logical and consistent with the types of behaviours that would be expected to be linked with such personality types. The data were shown to meet all three criteria and provided strong evidence that the assessment method was reliably measuring horse personality.  
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  Notes Approved no  
  Call Number (up) refbase @ user @ Serial 1981  
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