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Benz, B.; Münzing, C.; Krueger, K.; Winter, D. |
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Title |
Ethologische Untersuchung von Heuraufen in der Pferdehaltung [Ethological investigation of hayracks in equine husbandry] |
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Journal Article |
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Year  |
2014 |
Publication |
Landtechnik |
Abbreviated Journal |
Landtechnik |
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Volume |
69 |
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5 |
Pages |
239-244 |
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Keywords |
Pferdehaltung, Fressverhalten, Futterraufen [horse keeping, feeding behaviour, roughage racks] |
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Abstract |
Eine tiergerechte, physiologisch und anatomisch auf die Bedürfnisse der Pferde ausgerichtete
Raufutterversorgung sollte die Kaubedürfnisse und die Beschäftigungszeiten von Pferden
ausreichend berücksichtigen. Daher – und auch aufgrund des bestehenden Kostendrucks bei
Raufutter – steigt das Interesse an Raufutterraufen, durch die möglicherweise die Futteraufnahmezeiten
verlängert sowie Futterverluste minimiert werden können.
Die vorliegende Untersuchung vergleicht das Fressverhalten und die Körperhaltung von acht
Pferden beim Einsatz von drei unterschiedlichen Futterraufen mit der Bodenfütterung in Einzelboxenhaltung.
Die Ergebnisse dieser Studie lassen den Schluss zu, dass der Einsatz von
Raufutterraufen die Futteraufnahmezeiten verlängert und somit längere Beschäftigungszeiten
für die Futteraufnahme gewährleistet werden. Außerdem konnte festgestellt werden, dass die
Pferde das Raufutter bei einer der drei untersuchten Raufen überwiegend mit natürlicher Kopf-
Hals-Haltung aufnahmen.
[Regarding the species horse, an appropriate supply of roughage should take into account the
need to chew as well as the need for occupation. In this context, and due to the current cost
pressure for hay, the interest in roughage racks increases. It is assumed that roughage racks
could help to extend the feeding time and reduce food losses.
The present study places the emphasis on the observation of the feeding behaviour of eight
horses in single horse boxes. Three different roughage racks are compared to traditional feeding
on the floor. On the basis of the results it may be concluded that the use of roughage racks
extends the feeding time and thus ensures longer occupation. In one of the three roughage
racks investigated the horses mainly eat in a natural posture of their head and neck.] |
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Equine Behaviour @ team @ |
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5840 |
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Author |
Wolter, R.; Pantel, N.; Stefanski, V.; Möstl, E.; Krueger, K. |
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Title |
The role of an alpha animal in changing environmental conditions |
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Journal Article |
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Year |
2014 |
Publication |
Physiology & Behavior |
Abbreviated Journal |
Physiol. Behav. |
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Volume |
133 |
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236-243 |
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Keywords |
Alpha male; Horse; Equus ferus przewalskii; Bachelor group; Group structure |
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Abstract The maintenance and development of conservation areas by grazing of large herbivores, such as Przewalski's horses, is common practice. Several nature conservation areas house male bachelor groups of this species. When males are needed for breeding they are removed from the groups, often without considering group compositions and individual social positions. However, alpha animals are needed for ensuring group stability and decision making in potentially dangerous situations in several species. To investigate the role of the alpha male in a bachelor group, we observed the behaviour of five Przewalski's horse males during the enlargement of their enclosure. We analyzed the group's social structure and movement orders, as well as the animals' connectedness, activity budgets, and whether they moved with preferred group members and how factors such as social rank influenced the horses' behaviour. We also investigated the excretion of glucocorticoid metabolites (GCM) via faeces of the horses while exploring a new area as a parameter of glucocorticoid production. Our results show that the alpha male is important for a bachelor group in changing environmental conditions. The alpha male had the highest level of connectedness within the group. When exploring the new environment, its position in the group changed from previously being the last to being the first. Furthermore the whole group behaviour changed when exploring the new area. The stallions showed reduced resting behavior, increased feeding and did not stay close to each other. We found that the excretion of glucocorticoid metabolites of most horses rose only marginally during the first days on the new area while only the alpha male showed a significant increased amount of glucocorticoid production during the first day of the enclosure enlargement. |
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0031-9384 |
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Equine Behaviour @ team @ |
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5818 |
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Töpfer, D.; Wolter, R.; Krueger, K. |
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Fallstudie zum Platzangebot, Verhalten und Wohlbefinden der Pferde (Equus caballus) in Mehrraum-Außenlaufställen mit Aus-lauf und Bewegungsställen [A case study to space, behavior and well-being of horses (Equus caballus) in open stables and open active stables] |
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2014 |
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KTBL Schriften |
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Verhaltensbeobachtungen erfolgten an 112 Pferden in Mehrraum-Außenlaufställen mit Auslauf und Bewegungsställen. Bei vermehrtem Platzangebot sinkt das agonistische Verhalten in Bewegungsställen außerhalb des Fressbereiches. Mit zunehmender Stallgröße (überdachte Fläche und Auslauf) steigt in beiden Haltungsverfahren das affiliative Verhalten während das agonistische Verhalten mit Verletzungsrisiko sinkt. Daher wird für beide Haltungsverfahren ein möglichst großzügiger Stall je Pferd empfohlen. Die beobachteten Erkrankungen der letzten zwölf Monate zeigen vermehrt Hautkrankheiten in den Mehrraum-Außenlaufställen mit Auslauf, wohingegen Hufgeschwüre in Bewegungsställen auftraten. Wird der Fütterungsaspekt in den Bewegungsställen betrachtet, so ist die Transponderfütterung in Kombination mit ad libitum Fütterung aufgrund des deutlich geringeren, agonistischen Verhaltens beim Fressen, der reinen Transponderfütterung vorzuziehen. Mehrraum-Außenlaufställe mit Auslauf haben den Vorteil der synchronen Nahrungsaufnahme.
[The behaviour of 112 horses was observed in open stables and open active stables. Horses show less agonistic behaviour outside of the feeding area in open active stables as the space for each horse is augmented. Also the affiliative behaviour increases as a function of more space per horse while agonistic behaviour with a risk for injury decreases. These results are independent from the husbandry system. Due to this fact a stable with a larger area per horse is recommended. Diseases of the last twelve month were recorded and show skin diseases in open stables and abscesses in the hooves in open active stables. To consider the feeding in open active stables it was found that horses which were fed with hay controlled by transponders showed more agonistic behaviour in contrast to horses being fed using transponders but with access to hay ad libitum. Thus transponder feeding in combination with ad libitum feeding is recommended. Open stables have the advantage of synchronized feeding.] |
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KTBL |
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Darmstadt |
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KTBL Schriften |
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Equine Behaviour @ team @ |
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5862 |
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Author |
Krueger, K. |
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Title |
Social learning and innovative behaviour in horses |
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Conference Article |
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Year |
2015 |
Publication |
Proceedings of the 3. International Equine Science Meeting |
Abbreviated Journal |
Proc. 3. Int. Equine. Sci. Mtg |
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social learning, innovative behaviour, Equus caballus, cognitive capacities |
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The evaluation of important parameters for measuring the horses’ cognitive capacities is one of the central topics of the equine behaviour team at Nürtingen-Geislingen University. Social complexity has been said to be one of the settings in which needs for cognitive capacities arise in animals. A variety of studies throughout the last two decades proved the horses’ social complexity to be far more elaborate than previously assumed. Horses form social bonds for the protection of offspring, intervene in encounters of others, identify group mates individually and easily orientate in a fission fusion society.
In such socially complex societies, animals will benefit from learning socially. In many bird and primate species the degree of social complexity correlates nicely with the species abilities for social learning. Social learning was, therefore, argued to be an indicator for elaborate mental capacities in animals. We were delighted to prove that horses actually copy social behaviour and techniques for operating a feeding apparatus from older and higher ranking group members. In a recent study we found young horses, at the age of 3 to 12, to copy the operation of a feeding apparatus from a human demonstrator. Social learning seems to work nicely in horses when the social background of the animals is considered.
The degree to which individual animals adapt to changes in their social or physical environment by finding innovative solution appears to be the other side of the coin, of whether animals adjust to challenges by social learning. It is not very astonishing, that along with the animals’ social complexity and their ability to learn socially also the degree to which they show innovative behaviour was claimed to be one of the most important demonstrations of advanced cognitive capacities. In a recent approach, we started to ask horse owners and horse keepers in many countries to tell us about unusual behaviour of their horses via a web site (http://innovative-behaviour.org). To date, we received 204 cases of innovative behaviour descriptions from which six cases were clear examples of tool use or borderline tool use. We categorized the innovative behaviours into the classes, a) innovations to gain food, b) innovations to gain freedom, c) social innovations, d) innovations to increase maintenance, and e) innovations that could not be clearly assigned to a category. About 20% of the innovative horses showed more than one innovation. These animals could be termed “true innovators”. Again, young horses were more innovative than older ones with the age group 5 – 9 showing the highest number of innovative behaviour descriptions.
In a nutshell, the horses’ cognitive capacities appear to be underestimated throughout the last decades. The horses’ social complexity is far more elaborate than previously assumed, horses learn socially from conspecific and humans, some of them demonstrate innovative behaviour adaptations to their environment and even simple forms of tool use. |
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Corporate Author |
Krueger, K. |
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Xenophon Publishing |
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Wald |
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in prep |
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978-3-95625-000-2 |
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Equine Behaviour @ team @ |
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5848 |
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Author |
Krueger, K.; Schneider, G.; Flauger, B.; Heinze, J. |
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Title |
Context-dependent third-party intervention in agonistic encounters of male Przewalski horses |
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Journal Article |
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Year |
2015 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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121 |
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54-62 |
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Keywords |
Equus ferus przewalskii; Group conflict; Rank orders; Social bonds; Social control; Third-party intervention |
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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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0376-6357 |
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Equine Behaviour @ team @ |
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5925 |
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Hinz, K.; Sennet, S.; Maros, K.; Krueger, K. |
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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 |
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2015 |
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Current research in applied ethology [Aktuelle Arbeiten zur artgemäßen Tierhaltung |
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computerized feeding, waiting situation, stress, horse |
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KTBL-Schrift 510 |
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Darmstadt |
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978-3-945088-13-5 |
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Equine Behaviour @ team @ |
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5927 |
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Wolter, R.; Krueger, K. |
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Einflussfaktoren auf das Grooming-Verhalten bei wilden und verwilderten Pferden [Influencing factors on grooming behaviour in wild living horses] |
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Book Chapter |
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2015 |
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Current research in applied ethology [Aktuelle Arbeiten zur artgemäßen Tierhaltung] KTBL Schrift 510 |
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KTBL Schrift 510 |
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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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KTBL-Schrift 510 |
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Darmstadt |
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978-3-945088-13-5 |
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Equine Behaviour @ team @ |
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5928 |
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Author |
Krueger, K.; Hollenhorst, H.; Schuetz, A.; Weil, S. |
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Title |
Social learning and innovative learning in horses. |
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Conference Article |
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2015 |
Publication |
Proceedings of the 3. International Equine Science Meeting |
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3 |
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Xenophon Publishing |
Place of Publication |
Wald |
Editor |
K. Krueger |
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978-3-95625-000-2 |
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Equine Behaviour @ team @ |
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5956 |
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Author |
Wolter, R.; Krueger, K. |
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Title |
The analysis of social bonds in feral horses |
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Conference Article |
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Year |
2015 |
Publication |
Proceedings of the 3. International Equine Science Meeting |
Abbreviated Journal |
Proc. 3. Int. Equine. Sci. Mtg |
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social bonds, grooming, nearest neighborhood, rank |
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In many social mammals, individuals preferentially affiliate with a small subset of available partners instead of distributing their social behaviors equally among all group members. The resulting social bonds have been investigated in several mammalian taxa, especially in primate societies, but also in other taxa such as birds, dolphins, rodents and ungulates. In feral horses, a great number of studies on social bonds can be found, but with a huge variety between methods for the analysis. There seems to be a lack of a clear and common definition of social bonds in horses and of comparable analyses. For example, there are irregularities between the studies regarding the research designs, the selection of recording methods and the interpretation of the measurements. Mutual grooming is used most often for the analysis of social relationships in many species. As mutual grooming is rare in horses, especially measurements of spatial proximity are commonly used for the analysis of social bonds in addition to other behavioral patterns. However, the combination of mutual grooming and nearest neighborhood analyses for the analysis of social bond is debatable, as in contrast to mutual grooming, which must occur deliberately by both grooming partners, the spatial distribution can be influenced by one partner alone, which may even force the other horse to keep a certain distance or to stay in close proximity.
In this study, we investigated the comparability of mutual grooming and nearest neighborhood data for social bond analyses in feral horses. Therefore, we observed five groups of semi-wild living Przewalski’s horses and six groups of feral horses.
We analysed the horses’ social ranks by applying an Average Dominance Index, we recorded the distances between the animals and observed the number of mutual grooming events as well as friendly approaches.
Our results show that there was only a weak correlation between the frequency of staying in nearest neighborhood and mutual grooming in all observed horse groups. In contrast to this, the correlation between the number of friendly approaches and mutual grooming events was higher in most groups.
Hierarchies did not affect social bonds, as mutual grooming was similarly induced by higher and lower ranking animals and the social rank did not affect the choice of the grooming partner. Similarly, likelihoods of staying in the neighborhood of particular animals were not affected by the animals’ social rank.
The grooming frequencies differed between the different horse groups and between the individual horses living in the particular groups. They seem to be effected by individual predisposition.
Altogether we suggest that the ratio of mutual grooming seems to be a better indicator for social bonds in feral horses than the frequency of staying in the nearest neighborhood. Mutual grooming occurs deliberately and is bidirectional, whereas nearest neighborhoods could be enforced and unidirectional. For the calculation of social bonds in horses, we consider it to be more reliable to combine the frequency of mutual grooming with the frequency of friendly approaches. |
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Corporate Author |
Wolter, R. |
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978-3-95625-000-2 |
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Equine Behaviour @ team @ |
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5882 |
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Author |
Hollenhorst, H.; Weil, S.; Krueger, K. |
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Title |
Innovative behavour in horses (Equus caballus) |
Type |
Conference Article |
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Year |
2015 |
Publication |
Proceedings of the 3. International Equine Science Meeting |
Abbreviated Journal |
Proc. 3. Int. Equine. Sci. Mtg |
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Keywords |
innovative behavior, age, housing system, horse (Equus caballus) |
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Abstract |
Contrary to the widely-spread assumption that horses just have restricted cognitive capacities and are not very flexible in their behaviors, we showed that horses display innovative behavior and even make use of tools (Krueger 2015, Krueger et al. 2015). These findings derive from a database (http://innovative-behaviour.org/) the Equine behavior team managed in the past two years. Some horses did not only show single innovations, but several different innovations. The number of innovations per individual varied from 1 to 10. 20 % of all innovative horses in the database showed more than one innovation. These individuals can be called the ‘true innovators’. Moreover innovations were dependent on age. Young horses were more innovative than older ones, whereby horses at the age of five to nine years were the most innovative. When considering the housing system innovative horses in a single housing (inside box, outside box, paddock box) had a slight majority towards horses in group housing (open stable, active stable, pasture day and night). But given the fact that ratings on housing system frequencies state 95% of the horses to be kept in individual housing, innovations in individual housing are rare. Nevertheless, horses kept in inside boxes without a window, opened doors more often than all other horses. Aside from this effect, housing systems did not trigger the frequency of innovative behavior. Innovations for gaining freedom and innovations in general were widespread among horses with daily access to pasture and daily contact with conspecifics. Innovations for gaining food were not more likely to occur in horses that were fed little amounts of roughage. In conclusion, the housing of horses does not seem to be the primary catalyst for developing innovative behavior in horses. What makes a “true innovator” in horses, in addition to age, remains to be seen. |
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Corporate Author |
Hollenhorst, H. |
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Publisher |
Xenophon Publishing |
Place of Publication |
Wald |
Editor |
; Krueger, K. |
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Abbreviated Series Title |
Proc. 3. Int. Equine. Sci. Mtg |
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ISBN |
978-3-95625-000-2 |
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Notes |
Id - |
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no |
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Call Number |
Equine Behaviour @ team @ |
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5896 |
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