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Author Schnitzer, U. openurl 
  Title Grundsätze der Gymnastizierung des Reitpferdes Type Book Whole
  Year 1998 Publication Abbreviated Journal  
  Volume Issue Pages 16  
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  Publisher Place of Publication Editor  
  Language Deutsch Summary Language Original Title  
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  Notes Approved no  
  Call Number Reiten Lesen Denken @ eberhardhuebener @ Serial 1064  
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Author Bürger, U. isbn  openurl
  Title The Way to perfect Horsemanship Type Book Whole
  Year 1998 Publication Abbreviated Journal  
  Volume Issue Pages 254  
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  Abstract The Way to Perfect Horsemanship is an outstanding work in the vast literature devoted to horsemanship. It provides, for the first time, a clear insight into the psychological makeup of the horse, its muscular system, the mechanics of its movement, and the aids to human-to-horse communication. Udo Burger presents his philosophy of riding in a scientific manner, asserting that no one can no more learn to ride without a knowledge of horse physiology and psychology than one can learn the art of medecine without a background in health and disease. He clearly explains what one should feel and do on horseback--ultimately, as if one is part of the horse, completely united with it in all of its movements. Anyone with a genuine empathy for horses--wether teacher, trainer, competitor, or occasional rider--will benefit enormously from reading this classic work on horsemanship. The late Udo Burger was an accomplished horseman and one of Germany's most esteemed equine veterinarians.  
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  Publisher Trafalgar Square Publishing Place of Publication Editor  
  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN ISBN 978-1570761294 Medium  
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  Notes 1st English cased ed edition (October 1, 1998) Approved no  
  Call Number Reiten Lesen Denken @ eberhardhuebener @ Serial 1594  
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Author Galef, B. G. JR; White, D.J. url  doi
openurl 
  Title Mate-choice copying in Japanese quail, Coturnix coturnix japonica Type Journal Article
  Year 1998 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 55 Issue 3 Pages 545-552  
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  Notes Approved no  
  Call Number Serial 1814  
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Author Stoehr S. doi  openurl
  Title Evolution of mate-choice copying: a dynamic model Type Journal Article
  Year 1998 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 55 Issue 4 Pages 893-903  
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  Abstract Mate-choice copying has recently been demonstrated in several species. Two, not mutually exclusive, explanations for copying have been proposed: it reduces sampling costs and/or error of mate choice. In guppies, Poecilia reticulata, and black grouse, Tetrao tetrix, young females seem most likely to copy. Therefore, copying may teach inexperienced females what attractive males look like. I developed a 2-year dynamic model, to investigate under which conditions a mate-copying strategy might first evolve. An original population of pure choosers was assumed, which was invaded by a mutant female, able to copy during her first mating season, thereby instantly improving her ability to assess male quality. Alternatively, she could either wait and learn by observing males, just as non-copiers may do, but incurring some time costs, or choose, relying on her own abilities. The degree to which copying occurred among these mutant, young, inexperienced females increased with an increasing proportion of old, experienced females in the population, and with decreasing time left until the end of the season. The model demonstrates that mate-choice copying may evolve, when young females are poor at discrimination and need to learn what high-quality males look like. Male quality proved to be unimportant for copying to evolve, as long as there are sufficient differences in quality for mate choice to be meaningful. As with previous models, time constraints are an important assumption for copying to be advantageous over non-copying. Copyright 1998 The Association for the Study of Animal Behaviour. Copyright 1998 The Association for the Study of Animal Behaviour.  
  Address Department of Zoology, Uppsala University, Sweden  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 0003-3472 ISBN Medium  
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  Notes PMID:9632476 Approved no  
  Call Number Serial 1822  
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Author Coleman, K.; Wilson, D.S. url  doi
openurl 
  Title Shyness and boldness in pumpkinseed sunfish: individual differences are context-specific Type Journal Article
  Year 1998 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 56 Issue 4 Pages 927-936  
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  Abstract Natural selection often promotes a mix of behavioural phenotypes in a population. Adaptive variation in the propensity to take risks might explain individual differences in shyness and boldness in humans and other species. It is often implicitly assumed that shyness and boldness are general personality traits expressed across many situations. From the evolutionary standpoint, however, individual differences that are adaptive in one context (e.g. predator defence) may not be adaptive in other contexts (e.g. exploration of the physical environment or intraspecific social interactions). We measured the context specificity of shyness and boldness in a natural population of juvenile pumpkinseed sunfish,Lepomis gibbosus, by exposing the fish to a potentially threatening stimulus (a red-tipped metrestick extended towards the individual) and a nonthreatening stimulus (a novel food source). We also related these measures of shyness and boldness to behaviours observed during focal observations, both before and after the introduction of a predator (largemouth bass,Micropterus salmoides). Consistent individual differences were found within both contexts, but individual differences did not correlate across contexts. Furthermore, fish that were scored as intermediate in their response to the metrestick behaved most boldly as foragers and in response to the bass predators. These results suggest that shyness and boldness are context-specific and may not exist as a one-dimensional behavioural continuum even within a single context.  
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  Notes Approved no  
  Call Number Serial 2094  
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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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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2168  
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Author Bouman, I. openurl 
  Title The reintroduction of Przewalski horses in the Hustain Nuruu Mountain Forest Steppe Reserve in Mongolia Type Journal Article
  Year 1998 Publication Mededelingen: Netherlands Commission for International Nature Protection Abbreviated Journal  
  Volume 32 Issue Pages  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2241  
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Author Johnsson, J.I.; Akerman, A. url  doi
openurl 
  Title Watch and learn: preview of the fighting ability of opponents alters contest behaviour in rainbow trout Type Journal Article
  Year 1998 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 56 Issue 3 Pages 771-776  
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  Abstract The costs associated with initial conflicts could be reduced if animals can assess the fighting ability of possible future opponents by watching their contest success against other individuals. We tested this hypothesis by conducting repeated dyadic dominance trials on size-matched juvenile rainbow trout,Oncorhynchus mykiss. In the first trial a dyadic contest was `observed' by a single fish separated by a transparent divider. In the second trial, the observer was paired against either the `familiar' dominant fish or an unfamiliar dominant fish from the first trial. We predicted that observers should settle conflicts with previewed opponents faster and with less aggression than those with unfamiliar fish. This prediction was supported for observers that lost against a previewed competitor, since these fish reduced their aggression more rapidly than did unfamiliar observers. Familiar observers that won, however, showed a more rapid increase in aggression compared with unfamiliar winning observers. This suggests that, regardless of whether an observer challenges the initial dominant, this `decision' is taken more rapidly in conflicts with preassessed contestants, because of the a priori information about their fighting ability. Since preassessment could save energy and allow effort to be concentrated on contests with a high payoff/probability of winning, selection may favour preview strategies when contest competition over resources is important for fitness.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2869  
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Author Czeschlik, T. doi  openurl
  Title Animal cognition – the phylogeny and ontogeny of cognitive abilities Type Journal Article
  Year 1998 Publication Animal Cognition Abbreviated Journal Anim. Cogn.  
  Volume 1 Issue 1 Pages 1-2  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3100  
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Author Astié, A.A.; Kacelnik, A.; Reboreda, J.C. doi  openurl
  Title Sexual differences in memory in shiny cowbirds Type Journal Article
  Year 1998 Publication Animal Cognition Abbreviated Journal Anim. Cogn.  
  Volume 1 Issue 2 Pages 77-82  
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  Abstract Avian brood parasites depend on other species, the hosts, to raise their offspring. During the breeding season, parasitic cowbirds (Molothrus sp.) search for potential host nests to which they return for laying a few days after first locating them. Parasitic cowbirds have a larger hippocampus/telencephalon volume than non-parasitic species; this volume is larger in the sex involved in nest searching (females) and it is also larger in the breeding than in the non-breeding season. In nature, female shiny cowbirds Molothrus bonariensis search for nests without the male's assistance. Here we test whether, in association with these neuroanatomical and behavioural differences, shiny cowbirds display sexual differences in a memory task in the laboratory. We used a task consisting of finding food whose location was indicated either by the appearance or the location of a covering disk. Females learnt to retrieve food faster than males when food was associated with appearance cues, but we found no sexual differences when food was associated with a specific location. Our results are consistent with the view that parasitism and its neuroanatomical correlates affect performance in memory tasks, but the effects we found were not in the expected direction, emphasising that the nature of avian hippocampal function and its sexual differences are not yet understood.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3158  
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