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Author Gerber, B.; Hendel, T. doi  openurl
  Title Outcome expectations drive learned behaviour in larval Drosophila Type Journal Article
  Year 2006 Publication Proceedings of the Royal Society B: Biological Sciences Abbreviated Journal Proc. Roy. Soc. Lond. B Biol. Sci.  
  Volume 273 Issue 1604 Pages 2965-2968  
  Keywords  
  Abstract Why does Pavlov's dog salivate? In response to the tone, or in expectation of food? While in vertebrates behaviour can be driven by expected outcomes, it is unknown whether this is true for non-vertebrates as well. We find that, in the Drosophila larva, odour memories are expressed behaviourally only if animals can expect a positive outcome from doing so. The expected outcome of tracking down an odour is determined by comparing the value of the current situation with the value of the memory for that odour. Memory is expressed behaviourally only if the expected outcome is positive. This uncovers a hitherto unrecognized evaluative processing step between an activated memory trace and behaviour control, and argues that learned behaviour reflects the pursuit of its expected outcome. Shown in a system with a simple brain, an apparently cognitive process like representing the expected outcome of behaviour seems to be a basic feature of behaviour control.  
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  Notes Approved no  
  Call Number (down) refbase @ user @ Serial 3525  
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Author Thoren Hellsten, E.; Viklund, A.; Koenen, E.P.C.; Ricard, A.; Bruns, E.; Philipsson, J. url  doi
openurl 
  Title Review of genetic parameters estimated at stallion and young horse performance tests and their correlations with later results in dressage and show-jumping competition Type Journal Article
  Year 2006 Publication Livestock Science Abbreviated Journal  
  Volume 103 Issue 1-2 Pages 1-12  
  Keywords Genetic parameters; Sport horse; Performance test; Competition; Dressage; Show-jumping  
  Abstract Results from performance tests and competitions of young horses are used by major European warmblood horse breeding associations for genetic evaluations. The aim of this review was to compare genetic parameters for various tests of young horses to assess their efficiency in selection for dressage and show-jumping. Improved understanding of genetic information across countries is also necessary, as foreign trade with semen is rapidly increasing. The review is based on inquiries to European breed associations and on (17) scientific publications available, which have analysed genetic parameters of young horse data and/or relationships between young and mature horse results in sport. Despite differences in testing methods of young horses, results for major horse populations were in good agreement. Specially designed young horse performance tests, including stallion tests, showed high heritabilities and high genetic correlations with later competition results. We recommend that test results are encouraged to be used across countries for genetic evaluation of imported stallions and semen. Short station tests are generally preferred when selecting stallions for both dressage and jumping traits, whereas competition data may be used when selecting for only one discipline. We also recommend that extensive field testing of young horses is encouraged and should include both genders.  
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  Call Number (down) refbase @ user @ Serial 3951  
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Author Lewczuk, D.; Sloniewski, K.; Reklewski, Z. url  openurl
  Title Repeatability of the horse's jumping parameters with and without the rider Type Journal Article
  Year 2006 Publication Livestock Science Abbreviated Journal  
  Volume 99 Issue 2-3 Pages 125-130  
  Keywords Via; Jumping; Linear parameters; Stallion's test  
  Abstract The total number of 4323 jumps with and without the rider of 141 young stallions were filmed and measured using video image analysis. Horses were filmed on the doublebarre fence (100, 110 and 120 cm) with the same width of 90 cm. The style of jump was characterised by measurements of taking off and landing distances, as well as some measurements of the silhouette of the horse over the obstacle. The repeatability was 0.40-0.58 for distances of the jump's length, 0.37-0.56 for bascule's measurements and about 0.20 for legs' lifting above the fence. Traits measured under the rider and on the highest fences were more repeatable.  
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  Notes Approved no  
  Call Number (down) refbase @ user @ Serial 3969  
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Author Falewee, C.; Gaultier, E.; Lafont, C.; Bougrat, L.; Pageat, P. url  openurl
  Title Effect of a synthetic equine maternal pheromone during a controlled fear-eliciting situation Type Journal Article
  Year 2006 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 101 Issue 1-2 Pages 144-153  
  Keywords Horses; Behaviour; Fear; Pheromone; Heart rate; Performance  
  Abstract Horses are known to show fear reactions when confronted with novelty and this can be a considerable hindrance in the context of working situations such as riding, dressage or racing. The aim of the present study was to measure the potential effects of a synthetic analogue of the Equine Appeasing Pheromone on saddled horses when subjected to a stressful situation using a double-blinded, placebo controlled study design. A group of 40 horses was analyzed during this study and horses were divided by sex, breed and reactivity into two homogenized groups. The test, which consisted of walking the horse through a fringed curtain, was selected from a range of tests which are used to assess behaviour for the selection of French breeding stock. Horses that could have been subjected to the test on a previous occasion, and therefore be familiar with it, were not included. Behavioural and physiological parameters were both taken into account with measures of time to go through the curtain, fear related typical behavioural patterns, based on available literature detailed in the bibliography, and heart rate being recorded. Parameters were analyzed by means of Mann-Whitney U-test. Significant differences were noticed between the two groups concerning heart rate data during the test (UMeanHR = 100.5, pMeanHR = 0.02; UMaxHR = 75, pMaxHR = 0.001) and during the whole measured period (UMeanHR = 67, pMeanHR = 0.005; UMaxHR = 58, pMaxHR = 0.002). Observation of the animals also revealed less behavioural items characteristic of fear within the treated group. As a result, horses performed the test with a better time performance when they received the pheromone analogue (U = 62, p = 0.002). The main parameter, area under the HR graph, is based on heart rate measure and performance. Differences noticed (U = 74, p = 0.002) for this parameter lead to the conclusion that horses who received EAP underwent less stress related consequences in terms of their cardiac physiology. As horses are subjected to a number of foreseeable stressful events this study suggests that the use of Equine Appeasing Pheromone could be a significant factor in improving the welfare of this species.  
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  Call Number (down) refbase @ user @ Serial 3992  
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Author Larose, C.; Richard-Yris, M.-A.; Hausberger, M.; Rogers, L.J. doi  openurl
  Title Laterality of horses associated with emotionality in novel situations Type Journal Article
  Year 2006 Publication Laterality Abbreviated Journal Laterality  
  Volume 11 Issue 4 Pages 355-367  
  Keywords Affect/*physiology; Animals; Brain/*physiology; Female; Functional Laterality/*physiology; Horses; Male; *Social Behavior; *Social Environment  
  Abstract We have established that lateral biases are characteristic of visual behaviour in 65 horses. Two breeds, Trotters and French Saddlebreds aged 2 to 3, were tested on a novel object test. The main finding was a significant correlation between emotionality index and the eye preferred to view the novel stimulus: the higher the emotionality, the more likely that the horse looked with its left eye. The less emotive French Saddlebreds, however, tended to glance at the object using the right eye, a tendency that was not found in the Trotters, although the emotive index was the same for both breeds. The youngest French Saddlebreds did not show this trend. These results are discussed in relation to the different training practices for the breeds and broader findings on lateralisation in different species.  
  Address Universite de Rennes 1, France  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 1357-650X ISBN Medium  
  Area Expedition Conference  
  Notes PMID:16754236 Approved no  
  Call Number (down) Equine Behaviour @ team @ room B 3.029 Serial 1826  
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Author Boogert, N.J.; Reader, S.M.; Laland, K.N. url  doi
openurl 
  Title The relation between social rank, neophobia and individual learning in starlings Type Journal Article
  Year 2006 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 72 Issue 6 Pages 1229-1239  
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  Abstract Researchers with diverse interests in topics ranging from the formation of dominance hierarchies and social intelligence to animal personalities have predicted specific, and often conflicting, relations between social rank, neophobia and learning ability. We investigated the relations between these variables in captive groups of wild-caught starlings, Sturnus vulgaris, adopting a multidimensional approach to social rank and neophobia. Both agonistic and competitive rank orders were determined for each group and we tested individuals in the absence of their groupmates for object neophobia, latency to feed in a novel environment and performance on an extractive foraging task. In each starling group, the fastest learners occupied the highest competitive ranks, supporting the hypothesis that cognitive ability is positively correlated with social dominance. Competitive rank orders, however, did not correlate significantly with agonistic rank orders. Situation-specific foraging neophobia was suggested: individuals showed consistency in their latencies to feed near a variety of novel objects, but no significant correlation was found between this measure of object neophobia and latency to feed in a novel environment. Starlings fastest to feed in the novel environment were fastest in solving the foraging task. We discuss the implications of these findings for researchers studying hierarchy formation in animal groups, social intelligence and animal personalities.  
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  Call Number (down) Equine Behaviour @ team @ room B 3.029 Serial 2074  
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Author Nowak, S.; Jedrzejewski, W.; Schmidt, K.; Theuerkauf, J.; Myslajek, R.W.; Jedrzejewska, B. url  doi
openurl 
  Title Howling activity of free-ranging wolves (Canis lupus) in the Bialowieza Primeval Forest and the Western Beskidy Mountains (Poland) Type Journal Article
  Year 2006 Publication J Ethol Abbreviated Journal  
  Volume 25 Issue Pages  
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  Call Number (down) Equine Behaviour @ team @ Nowak2006 Serial 6459  
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Author Grange, S.; Duncan, P. url  doi
openurl 
  Title Bottom-up and top-down processes in African ungulate communities: resources and predation acting on the relative abundance of zebra and grazing bovids Type Journal Article
  Year 2006 Publication Ecography Abbreviated Journal  
  Volume 29 Issue 6 Pages 899-907  
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  Abstract African ungulate populations appear to be limited principally by their food resources. Within ungulate communities, plains zebras coexist with grazing bovids of similar body size, but rarely are the dominant species. Given the highly effective nutritional strategy of the equids and the resistance of zebras to drought, this is unexpected and suggests that zebra populations may commonly be limited by other mechanisms. Long-term research in the Serengeti ecosystem and in the Kruger National Park suggests that zebra could be less sensitive to food shortage, and more sensitive to predation, than grazing bovids: if this is a general principle, then, at a larger scale, resource availability should have a weaker effect on the abundance of zebra than on grazing ruminants of similar body size (wildebeest and buffalo), and zebras should be relatively more abundant in ecosystems where predators are rare or absent. We test these expectations using data on 23 near-natural ecosystems in east and southern Africa. The abundance of wildebeest is more closely related to resources than is that of zebra; buffalo are intermediate. We show that hyena densities are closely correlated with those of lions, and use the abundance of lions as an index of predation by large predators. The numerical response of lions to increases in the abundance of their prey was linear for mesoherbivores, and apparently so for the three species alone. Finally, the abundance of zebra relative to grazing bovids is lower in ecosystems with high biomasses of lions. These results indicate that zebras may commonly be more sensitive to top-down processes than grazing bovids: the mechanism(s) have not been demonstrated, but predation could play a role. If it is true, then when numbers of the large mammalian predators decline, zebra populations should increase faster than buffalo and wildebeest.  
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  Call Number (down) Equine Behaviour @ team @ Grange2006 Serial 2313  
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Author Fagot, J.; Cook, R.G. url  doi
openurl 
  Title Evidence for large long-term memory capacities in baboons and pigeons and its implications for learning and the evolution of cognition Type Journal Article
  Year 2006 Publication Proc Natl Acad Sci U S A Abbreviated Journal  
  Volume 103 Issue Pages  
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  Call Number (down) Equine Behaviour @ team @ Fagot2006 Serial 6278  
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Author Berger, K.M. url  doi
openurl 
  Title Carnivore-Livestock conflicts: effects of subsidized predator control and economic correlates on the sheep industry Type Journal Article
  Year 2006 Publication Conserv Biol Abbreviated Journal  
  Volume 20 Issue Pages  
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  Call Number (down) Equine Behaviour @ team @ Berger2006 Serial 6448  
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