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| Author | Krueger, K. (ed) | ||||
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Proceedings of the 2. International Equine Science Meeting | Type | Book Whole | ||
| Year | 2012 | Publication | IESM 2012 | Abbreviated Journal | |
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| Publisher | Xenophon Publishing | Place of Publication | Wald | Editor | Krueger, K. |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 6008 | ||
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| Author | Krueger, K. (ed) | ||||
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Proceedings of the 3. International Equine Science Meeting | Type | Conference Volume | ||
| Year | 2015 | Publication | IESM 2015 | Abbreviated Journal | |
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| Publisher | Xenophon Publishing | Place of Publication | Wald | Editor | Krueger, K. |
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| Series Editor | Series Title | Abbreviated Series Title | Proc. 3. Int. Equine. Sci. Mtg | ||
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| ISSN | ISBN | 978-3-95625-000-2 | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Id - | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 5906 | ||
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| Author | Krueger, K. (ed) | ||||
| Title |
Proceedings of the International Equine Science Meeting 2008 | Type | Conference Volume | ||
| Year | 2008 | Publication | IESM 2008 | Abbreviated Journal | |
| Volume | Issue | Pages | |||
| Keywords | Equine Ecology; Equine Sociality; Equine Learning; Equine Cognition; Equine Welfare | ||||
| Abstract | Target group: Biologists, Psychologists, Veterinarians and Professionals Meeting target: Because the last international meeting on Equine Science took place a couple years ago, there is an urgent need for equine scientists to exchange scientific knowledge, coordinate research provide knowledge for practical application, and discus research results among themselves and with professionals who work with horses. Additionally, dialog concerning the coordination of the study “Equitation Science” in Europe is urgently needed. Coordination and cooperation shall arise from the meeting, enrich the research, and advance the application of scientific knowledge for the horses` welfare. |
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| Publisher | Xenophon Verlag | Place of Publication | Wald | Editor | Krueger, K. |
| Language | English | Summary Language | Original Title | ||
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| ISSN | ISBN | 978-3-9808134-0-2 | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 4508 | ||
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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. | ||||
| 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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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 6668 | ||
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| Author | Schanz, L.; Krueger, K.; Hintze, S. | ||||
| Title |
Sex and Age Don't Matter, but Breed Type Does--Factors Influencing Eye Wrinkle Expression in Horses | Type | Journal Article | ||
| Year | 2019 | Publication | Frontiers in Veterinary Science | Abbreviated Journal | Front. Vet. Sci. |
| Volume | 6 | Issue | Pages | 154 | |
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| Abstract | Identifying valid indicators to assess animals' emotional states is a critical objective of animal welfare science. In horses, eye wrinkles above the eyeball have been shown to be affected by pain and other emotional states. From other species we know that individual characteristics, e.g. age in humans, affect facial wrinkles, but it has not yet been investigated whether eye wrinkle expression in horses is systematically affected by such characteristics. Therefore, the aim of this study was to assess how age, sex, breed type, body condition and coat colour affect the expression and/or the assessment of eye wrinkles in horses. To this end, we adapted the eye wrinkle assessment scale from Hintze et al. (2016) and assessed eye wrinkle expression in pictures taken from the left and the right eye of 181 horses in a presumably neutral situation, using five outcome measures: a qualitative first impression reflecting how worried the horse is perceived by humans, the extent to which the brow is raised, the number of wrinkles, their markedness and the angle between a line through both corners of the eye and the topmost wrinkle. All measures could be assessed highly reliable with respect to intra- and inter-observer agreement. Breed type affected the width of the angle (F2, 114 = 8.20, p < 0.001), with thoroughbreds having the narrowest angle (M = 23.80, SD = 1.60), followed by warmbloods (M = 28.00, SD = 0.60), and coldbloods (M = 31.00, SD = 0.90). None of the other characteristics affected any of the outcome measures, and eye wrinkle expression did not differ between the left and the right eye area (all p-values > 0.05). In conclusion, horses' eye wrinkle expression and its assessment in neutral situations was not systematically affected by the investigated characteristics, except for 'breed type', which accounted for some variation in 'angle'; how much eye wrinkle expression is affected by emotion or perhaps mood needs further investigation and validation. | ||||
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| ISSN | 2297-1769 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 6578 | ||
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| Author | Flauger, B.; Krueger, K.; Gerhards, H.; Möstl, E. | ||||
| Title |
Simplified method to measure glucocorticoid metabolites in faeces of horses | Type | Journal Article | ||
| Year | 2010 | Publication | Veterinary Research Communications | Abbreviated Journal | Vet Res Comm |
| Volume | 34 | Issue | 2 | Pages | 185-195 |
| Keywords | ACTH challenge; enzyme immunoassay; stress behaviour; cortisol | ||||
| Abstract | Glucocorticoids or their metabolites can be measured in several body fluids or excreta, including plasma, saliva, urine and faeces. In recent years the measurement of glucocorticoid metabolites (GCMs) in faeces has gained increasing attention, because of its suitability for wild populations. In horses, however, the group-specific enzyme immunoassay described so far has a limited racticability due to its complex extraction procedure. Therefore, we tested the applicability of other enzyme immunoassays for glucocorticoid metabolites. The present study clearly proved that an enzyme immunoassay (EIA) for 11-oxoetiocholanolone using 11-oxoetiocholanolone-17-CMO: BSA (3α,11-oxo-A EIA) as antigen showed high amounts of immunoreactive substances. Therefore it was possible to use just a small amount of the supernatant of a methanolic suspension of faeces. The results correlated well with the already described method for measuring GCMs in horse faeces, i.e. analysing the samples with an EIA after a two step clean up procedure of the samples (Merl et al. 2000). In addition, the 3α,11-oxo-A EIA has the advantage of providing a bigger difference between baseline values and peak values after ACTH stimulation. The new assay increased the accuracy of the test, lowered the expenses per sample, and storing samples at room temperature after collection was less critical than with other assays investigated in our study. This is a big advantage both in the field of wildlife management of equids and in the field of equestrian sports and it shows the importance of choosing an assay which is in good accordance with the metabolites excreted in a given species. |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5073 | ||
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| Author | Krueger, K. | ||||
| Title |
Social cognition and social learning in horses | Type | Conference Article | ||
| Year | 2008 | Publication | IESM 2008 | Abbreviated Journal | |
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| Abstract | In comparison to other social animals it appears to be far more difficult to show social learning in horses, although the social background of the animals prompts the prediction that social learning should be verifiable. This demands for a thorough analysis of conditions, context and effects of social learning which might not be as obvious in horses than in other social animals. Moreover, the horse“s social cognition in general, i.e. the processing, encoding, storage, retrieval, and application of social information, needs to be examined. In previous studies we addressed the horse”s perception of it“s social environment. Our results indicate that domestic horses are not only capable of distinguishing between familiar and unfamiliar horses but also of recognizing the social status of familiar horses relative to their own. Furthermore, they extract information from observing interactions between a familiar horse and a human experimenter, and adjust their behaviour according to the observed horse”s reaction and relative dominance status when they are themselves later confronted with the experimenter in a similar situation. Additionally, we showed in pilot experiments that horses paid more attention to the gaze of dominant horses from their own social group than to that of unknown or subordinate horses. In another study we suggested that horses of both sexes are capable of determining the social affiliation, the sex and, for their own group members, the identity of individuals, by sniffing their faeces. Hence, social affiliation and dominance relationships seemed to have a major influence on the horses` motivation to pay attention to their conspecifics. In the future we will take another step towards linking the horse“s social cognitive capacities with its social ecology, social structure, and individuality. In the context of comparative cognition research on the socially complex primates, or on a range of carnivores such as corvids, canids or dolphins, horses are particularly interesting, because they are highly social, but do not rely on social hunting or cooperative raising of offspring. Also foraging is simple for horses, predator avoidance is demanding and this may be the main reason for the horse”s complex social lives and their choice of learning tactics. Hence, we will investigate the horse"s investigative behaviour towards neutral, fear-eliciting and food related novel objects. We propose that, as in other species, sociality and distinct personalities are key features for the understanding of cognitive capacities and the choice of learning strategies. | ||||
| Address | University of Regensburg – Biology I | ||||
| Corporate Author | Krueger, K. | Thesis | |||
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| Area | Expedition | Conference | IESM 2008 | ||
| Notes | Talk 15 min IESM 2008 | Approved | yes | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4462 | ||
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| Author | Krueger, K. | ||||
| Title |
Social Ecology of Horses | Type | Book Chapter | ||
| Year | 2008 | Publication | Ecology of Social Evolution | Abbreviated Journal | |
| Volume | Issue | Pages | 195-206 | ||
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| Abstract | Horses (Equidae ) are believed to clearly demonstrate the links between ecology and social organization. Their social cognitive abilities enable them to succeed in many different environments, including those provided for them by humans, or the ones domestic horses encounter when escaping from their human care takers. Living in groups takes different shapes in equids. Their aggregation and group cohesion can be explained by Hamilton“s selfish herd theory. However, when an individual joins and to which group it joins appears to be an active individual decision depending on predation pressure, intra group harassment and resource availability. The latest research concerning the social knowledge horses display in eavesdropping experiments affirms the need for an extension of simple herd concepts in horses for a cognitive component. Horses obviously realize the social composition of their group and determine their own position in it. The horses exceedingly flexible social behavior demands for explanations about the cognitive mechanisms, which allow them to make individual decisions. ”Ecology conditions like those that favour the evolution of open behavioural programs sometimes also favour the evolution of the beginnings of consciousness, by favouring conscious choice. Or in other words, consciousness originates with the choice that are left open by open behavioural programs." Popper (1977) | ||||
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| Publisher | Springer Verlag | Place of Publication | Heidelberg | Editor | j. Korb and J. Heinze |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 4387 | ||
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| Author | Krueger, K.; Flauger, B. | ||||
| Title |
Social feeding decisions in horses (Equus caballus) | Type | Journal Article | ||
| Year | 2008 | Publication | Behavioural Processes | Abbreviated Journal | Behav. Process. |
| Volume | 78 | Issue | 1 | Pages | 76-83 |
| Keywords | Feeding decision; Horse; Rank; Social behaviour | ||||
| Abstract | Like many other herbivores, in a natural environment equids feed on rather evenly distributed resources. However, the vegetation in their vast habitats constantly changes. If food is plentiful only little competition occurs over food, and in non-competitive situations domestic horses tend to return to the same feeding site until it is overgrazed. In contrast, they compete over limited food for which the social status of the individuals appears to be important. Especially in ruminants several studies have proved an influence of social organisations, rank, sex and the depletion of feeding sites on the feeding behaviour of individuals. However, it is not yet understood whether and how social aspects affect horses“ feeding decisions. Curiosity about the influence of social rank on the horses” feeding decisions between two, equally with high-quality surplus food-filled buckets placed in different social feeding conditions, led us to create the test below. The observer horses were alternately tested with a dominant and a subordinate demonstrator placed in one of the three different positions. We conclude that domestic horses use social cognition and strategic decision making in order to decide where to feed in a social feeding situation. When possible they tend to return to the same, continuously supplied feeding site and switch to an “avoidance tendency” in the presence of dominant horses or when another horse is already feeding there. Thus, the social rank and the position of conspecifics affect the feeding strategy of horses. | ||||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 4394 | ||
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| Author | Flauger, B.; Krueger, K. | ||||
| Title |
Social feeding decisions in horses (Equus caballus) | Type | Conference Article | ||
| Year | 2012 | Publication | Proceedings of the 2. International Equine Science Meeting | Abbreviated Journal | Proc. 2. Int. Equine. Sci. Mtg |
| Volume | in press | Issue | Pages | ||
| Keywords | Feeding decision; Horse; Rank; Social behaviour | ||||
| Abstract | Like many other herbivores equids feed on rather evenly distributed resources. Especially in ruminants several studies have proved the influence of social organisations, rank, sex and the depletion of feeding sites on the feeding behaviour of individuals. However, it is not yet understood whether social aspects affect horses´ feeding decisions. Horses roam on vast habitats with constantly changing vegetation. In non-competitive situations domestic horses tend to return to the same feeding site until it is overgrazed. Whereas, for competition over limited food the social status of the individuals appears to be important. Curiosity about the influence of social rank and different social feeding conditions on the horses´ feeding decisions between two buckets, equally filled with high-quality surplus food, led us to create the test situation described here. The observer horses were alternately tested with a dominant and a subordinate demonstrator placed in one of three different positions. We conclude that domestic horses use cognitive strategic decision making in order to decide where to feed in a social feeding situation. When possible they tend to return to the same, continuously supplied feeding site and switch to an “avoidance tendency” when another horse is already feeding from it or in the presence of a dominant horse. Thus the position and the social rank of conspecifics affect the feeding strategy of horses. | ||||
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| Corporate Author | Flauger, B. | Thesis | |||
| Publisher | Xenophon Publishing | Place of Publication | Wald | Editor | |
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| ISSN | 978-3-9808134-26 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5581 | ||
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