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| Author | Krueger, K.; Flauger, B. | ||||
| Title | Social learning in horses from a novel perspective | Type | Journal Article | ||
| Year | 2007 | Publication  |
Behavioural Processes | Abbreviated Journal | Behav. Process. |
| Volume | 76 | Issue | 1 | Pages | 37-39 |
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 625 | ||
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| Author | Krueger, K.; Schneider, G.; Flauger, B.; Heinze, J. | ||||
| Title | Context-dependent third-party intervention in agonistic encounters of male Przewalski horses | Type | Journal Article | ||
| Year | 2015 | Publication |
Behavioural Processes | Abbreviated Journal | Behav. Process. |
| Volume | 121 | Issue | Pages | 54-62 | |
| Keywords | Equus ferus przewalskii; Group conflict; Rank orders; Social bonds; Social control; Third-party intervention | ||||
| Abstract | Abstract One mechanism to resolve conflict among group members is third party intervention, for which several functions, such as kin protection, alliance formation, and the promotion of group cohesion have been proposed. Still, empirical research on the function of intervention behaviour is rare. We studied 40 cases of intervention behaviour in a field study on 13 semi-wild bachelor horses (Equus ferus przewalskii) in (a) standard social situations, and (b) when new horses joined the group (i.e. introductions). Only interventions in agonistic encounters were analysed. Eight of 13 animals directed intervention behaviour toward threatening animal in agonistic encounters of group members. One stallion was particularly active. The stallions did not intervene to support former group mates or kin and interventions were not reciprocated. In introduction situations and in standard social situations, the interveners supported animals which were lower in rank, but targeted, threatening animals of comparable social rank. After introductions, stallions received more affiliative behaviour from animals they supported and thus appeared to intervene for alliance formation. In standard social situations, interveners did not receive more affiliative behaviour from animals they supported and may primarily have intervened to promote group cohesion and to reduce social disruption within the group. | ||||
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| ISSN | 0376-6357 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5925 | ||
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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 | Krueger, K.; Flauger, B.; Farmer, K.; Hemelrijk, C. | ||||
| Title | Movement initiation in groups of feral horses | Type | Journal Article | ||
| Year | 2014 | Publication |
Behavioural Processes | Abbreviated Journal | Behav. Process. |
| Volume | 103 | Issue | Pages | 91-101 | |
| Keywords | Horse; Equus ferus caballus; Distributed leadership; Herding; Departure; Rank | ||||
| Abstract | Abstract Herds of ungulates, flocks of birds, swarms of insects and schools of fish move in coordinated groups. Computer models show that only one or very few animals are needed to initiate and direct movement. To investigate initiation mechanisms further, we studied two ways in which movement can be initiated in feral horses: herding, and departure from the group. We examined traits affecting the likelihood of a horse initiating movement i.e. social rank, affiliative relationships, spatial position, and social network. We also investigated whether group members join a movement in dominance rank order. Our results show that whereas herding is exclusive to alpha males, any group member may initiate movement by departure. Social bonds, the number of animals interacted with, and the spatial position were not significantly associated with movement initiation. We did not find movement initiation by departure to be exclusive to any type of individual. Instead we find evidence for a limited form of distributed leadership, with higher ranking animals being followed more often. | ||||
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| ISSN | 0376-6357 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5738 | ||
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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 | Krueger, K.; Marr, I.; Dobler, A.; Palme, R. | ||||
| Title | Preservation of fecal glucocorticoid metabolites and immunoglobulin A through silica gel drying for field studies in horses | Type | Journal Article | ||
| Year | 2019 | Publication |
Conservation Physiology | Abbreviated Journal | conphys |
| Volume | 7 | Issue | 1 | Pages | |
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| Abstract | Non-invasive methods enable stress evaluation through measuring fecal glucocorticoid metabolites (FGMs), and immunoglobulin A (IgA) in the feces avoiding stressful blood drawing or stressful restraining of animals in the field. However, FGMs and IgA are mostly analysed in freshly frozen samples, which is difficult when fresh samples cannot be frozen immediately or frozen samples cannot be stored or transported. Good results were also derived from air-dried fecal samples, which are hampered by unstable air humidity in the field. These difficulties may be overcome, when drying of samples could be induced with colorless silica gel (SiO2) granules in a secure set-up, such as an air tight tube. We determined the speed of drying 1.5 g of a fresh fecal sample from six horses on air and on silica gel. Furthermore, FGMs and IgA were analysed in differently stored subsamples from 12 horses: in frozen fecal samples, in air- or silica gel-dried samples stored for 1 day and for 7 days, and in wet fecal samples kept in a tube at room temperature for 7 days. FGM levels remained stable in feces dried on air or on silica gel for 7 days, whereas IgA quantities showed a significant loss. Under field conditions, when freezing or transporting the frozen samples is not possible and humidity hampers air drying, drying samples on silica gel in air tight tubes appears to be very helpful and reliable for analysing FGMs. | ||||
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| ISSN | 2051-1434 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 6594 | ||
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| Author | Hinz, K.; Sennet, S.; Maros, K.; Krueger, K. | ||||
| Title | Waiting behaviour in front of a computerized feeding system in an active stable – Effects on heart rate, heart rate variability and sensory laterality in horses | Type | Book Chapter | ||
| Year | 2015 | Publication |
Current research in applied ethology [Aktuelle Arbeiten zur artgemäßen Tierhaltung | Abbreviated Journal | |
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| Keywords | computerized feeding, waiting situation, stress, horse | ||||
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| Publisher | KTBL-Schrift 510 | Place of Publication | Darmstadt | Editor | |
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| ISSN | ISBN | 978-3-945088-13-5 | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5927 | ||
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| Author | Wolter, R.; Krueger, K. | ||||
| Title | Einflussfaktoren auf das Grooming-Verhalten bei wilden und verwilderten Pferden [Influencing factors on grooming behaviour in wild living horses] | Type | Book Chapter | ||
| Year | 2015 | Publication |
Current research in applied ethology [Aktuelle Arbeiten zur artgemäßen Tierhaltung] KTBL Schrift 510 | Abbreviated Journal | KTBL Schrift 510 |
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| Abstract | Die soziale Fellpflege wurde bei Equiden intensiv erforscht. Es stellte sich heraus, dass diverse Faktoren das Grooming-Verhalten beeinflussen können. Neben saisonalen Gegebenheiten sind dies vor allem soziale Faktoren, wie das Alter und Geschlecht der Tiere, die Hierarchie und Gruppenzusammensetzung sowie die Verwandtschaftsverhältnisse der Tiere untereinander. Diese Faktoren können sowohl bei der Häufigkeit der sozialen Fellpflege, als auch bei der Wahl des Partners eine entscheidende Rolle spielen. Zudem konnte gezeigt werden, dass auch das Aggressivitätslevel in einer Gruppe Einfluss auf das soziale Verhalten und die soziale Fellpflege nehmen kann. Inwiefern zwei Individuen, die sich häufig groomen, auch bevorzugt beieinander stehen, konnte bislang noch nicht eindeutig gezeigt werden, da es hierzu diverse Studien mit konträren Ergebnisse gibt. Dieser Aspekt sollte zukünftig dringend untersucht werden, da die beiden Datensätze häufig gemeinsam verwendet werden, um soziale Bindungen zu berechnen, ohne dass bislang ein eindeutiger Zusammenhang zwischen ihnen ermittelt werden konnte. [Summary Social grooming has been investigated intensively in Equids during the last years and several factors are known to influence the grooming behaviour. Beside seasonal conditions these are especially social factors as age and sex, hierarchy and group composition as well as kinship. These factors can affect the grooming frequencies and influence the choice of the grooming partner. Moreover, it could be demonstrated that the groups’ aggression level can influence the social behaviour and the grooming intensity. If individuals which show an increased grooming frequency often stand in close proximity as well, has not been affirmed, as, so far, no distinct correlation has been demonstrated. This aspect has to be investigated urgently, as both data sets are often used in combination for calculating social bonds.] |
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| Publisher | KTBL-Schrift 510 | Place of Publication | Darmstadt | Editor | |
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| ISSN | ISBN | 978-3-945088-13-5 | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5928 | ||
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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. | ||||
| Title | Perissodactyla Cognition | Type | Book Chapter | ||
| Year | 2017 | Publication |
Encyclopedia of Animal Cognition and Behavior | Abbreviated Journal | |
| Volume | Issue | Pages | 1-10 | ||
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| Publisher | Springer International Publishing | Place of Publication | Cham | Editor | Vonk, J.; Shackelford, T. |
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| ISSN | ISBN | 978-3-319-47829-6 | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ Krueger2017 | Serial | 6187 | ||
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