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Equine and Animal Cognition Reference Database

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Author Keil, N.M., Sambraus, H.H. url  openurl
  Title “Intervenors” in agonistic interactions amongst domesticated goats Type Journal Article
  Year 1998 Publication Zeitschrift fur Säugetierkunde Abbreviated Journal Z. Säugetierk.  
  Volume 63 Issue 5 Pages 266-272  
  Keywords Behaviour; Domestication; Goat; Intervention; Rank order  
  Abstract Social behaviour was observed in individually marked goats in two herds. The goats from one herd (n = 98) were horned, those of the other herd (n = 83) were polled. By recording agonistic interactions within the herds, a dominance index was determined for each animal. In both herds, intervention took place. Intervention is defined as one animal pushing in between two fighters, and thus ending the fight. More cases of intervention took place per individual animal amongst the horned goats than amongst the polled ones. Goats which intervened in fights on several occasions usually had a high dominance index. Members of the herd which were observed intervening only once had an average dominance index in both herds of almost 0.5. In some cases, goats very low in the rank order intervened a fight. Only rarely did the intervenors have a lower dominance index than the two fighters. In 103 cases, the direct dominance relationship between a fighting animal and the intervenor was known. In 95 cases (92.2%), the intervenor was dominant to the herd member in this fight and in just eight cases (7.8%), it was subordinate. It could not be determined what advantage the intervenor gained from its activity. It is possible that, at least in certain cases, a particularly relationship existed between the intervenor and one of the fighters.  
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  Call Number Equine Behaviour @ team @ Serial 5236  
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Author Oakenfull, E.A.; Ryder, O.A. doi  openurl
  Title Mitochondrial control region and 12S rRNA variation in Przewalski's horse (Equus przewalskii) Type Journal Article
  Year 1998 Publication Animal Genetics Abbreviated Journal Anim Genet  
  Volume 29 Issue 6 Pages 456-459  
  Keywords Animals; DNA, Mitochondrial/*genetics; Female; *Genetic Variation; Horses/*genetics; Male; Pedigree; RNA, Ribosomal/*genetics  
  Abstract Variation in the control region and the 12S rRNA gene of all surviving mitochondrial lineages of Przewalski's horse was investigated. Variation is low despite the present day population being descended from 13 individuals probably representing animals from three different regions of its range. Phylogenetic comparison of these sequences, with sequences for the domestic horse, does not resolve the ancestral status of either horse.  
  Address Center for Reproduction of Endangered Species, Zoological Society of San Diego, CA 92112, USA  
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  Language English Summary Language Original Title  
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  ISSN 0268-9146 ISBN Medium  
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  Notes PMID:9883508 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5040  
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Author Oliveira, R. F.; McGregor, P.K.; Latruffe, C. doi  openurl
  Title Know thine enemy: fighting fish gather information from observing conspecific interactions Type Journal Article
  Year 1998 Publication Proceedings of the Royal Society B: Biological Sciences Abbreviated Journal Proc. Roy. Soc. Lond. B Biol. Sci.  
  Volume 265 Issue 1401 Pages 1045-1049  
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  Abstract Many of the signals that animals use to communicate transmit relatively large distances and therefore encompass several potential signallers and receivers. This observation challenges the common characterization of animal communication systems as consisting of one signaller and one receiver. Furthermore, it suggests that the evolution of communication behaviour must be considered as occurring in the context of communication networks rather than dyads. Although considerations of selection pressures acting upon signallers in the context of communication networks have rarely been expressed in such terms, it has been noted that many signals exchanged during aggressive interactions will transmit far further than required for information transfer between the individuals directly involved, suggesting that these signals have been designed to be received by other, more distant, individuals. Here we consider the potential for receivers in communication networks to gather information, one aspect of which has been termed eavesdropping. We show that male Betta splendens monitor aggressive interactions between neighbouring conspecifics and use the information on relative fighting ability in subsequent aggressive interactions with the males they have observed.  
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  Call Number Equine Behaviour @ team @ Serial 2168  
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Author Barton, N. doi  openurl
  Title Evolutionary biology: The geometry of adaptation Type Journal Article
  Year 1998 Publication Nature Abbreviated Journal Nature  
  Volume 395 Issue 6704 Pages 751-752  
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  ISSN 0028-0836 ISBN Medium  
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  Notes 10.1038/27338 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5469  
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Author Clayton, N.S.; Dickinson, A. doi  openurl
  Title Episodic-like memory during cache recovery by scrub jays Type Journal Article
  Year 1998 Publication Abbreviated Journal Nature  
  Volume 395 Issue 6699 Pages 272-274  
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  Abstract The recollection of past experiences allows us to recall what a particular event was, and where and when it occurred1,2, a form of memory that is thought to be unique to humans3. It is known, however, that food-storing birds remember the spatial location4, 5, 6 and contents6, 7, 8, 9 of their caches. Furthermore, food-storing animals adapt their caching and recovery strategies to the perishability of food stores10, 11, 12, 13, which suggests that they are sensitive to temporal factors. Here we show that scrub jays (Aphelocoma coerulescens) remember 'when' food items are stored by allowing them to recover perishable 'wax worms' (wax-moth larvae) and non-perishable peanuts which they had previously cached in visuospatially distinct sites. Jays searched preferentially for fresh wax worms, their favoured food, when allowed to recover them shortly after caching. However, they rapidly learned to avoid searching for worms after a longer interval during which the worms had decayed. The recovery preference of jays demonstrates memory of where and when particular food items were cached, thereby fulfilling the behavioural criteria for episodic-like memory in non-human animals.  
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  Notes 10.1038/26216 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4788  
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Author Redbo, I.; Redbo-Torstensson, P.; Ödberg, F.O.; Hedendahl, A.; Holm, J. doi  openurl
  Title Factors affecting behavioural disturbances in race-horses Type Journal Article
  Year 1998 Publication Animal Science Abbreviated Journal  
  Volume 66 Issue 2 Pages 475-481  
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  Notes Cited By (since 1996): 30; Export Date: 21 October 2008 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4541  
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Author Byrne, R. W.; Russon, A. E. doi  openurl
  Title Learning by imitation: a hierachical approach Type Journal Article
  Year 1998 Publication Abbreviated Journal Behav. Brain Sci.  
  Volume 21 Issue Pages 667-721  
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  Call Number Equine Behaviour @ team @ Serial 5598  
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Author McLaren I.P.L. doi  openurl
  Title Animal Learning and Cognition: A neural network approach Type Journal Article
  Year 1998 Publication Trends in Cognitive Sciences Abbreviated Journal Trends. Cognit. Sci.  
  Volume 2 Issue Pages 236-236  
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  Call Number refbase @ user @ Serial 3464  
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Author Vallortigara G. doi  openurl
  Title Minds of Their Own Type Journal Article
  Year 1998 Publication Trends in Cognitive Sciences Abbreviated Journal Trends. Cognit. Sci.  
  Volume 2 Issue Pages 118-118  
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  Call Number refbase @ user @ Serial 3466  
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Author Sutton J.E.; Roberts W.A. doi  openurl
  Title Do pigeons show incidental timing? Some experiments and a suggested hierarchical framework for the study of attention in animal cognition Type Journal Article
  Year 1998 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 44 Issue Pages 263-275  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 3463  
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