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Marr, I.; Bauer, T.; Farmer, K.; Krueger, K. |
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Gibt die sensorische Lateralität im Objekttest Aufschluss über das Interieur, den aktuellen Gemütszustand, oder den Trainingszustand der Pferde? |
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2016 |
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33. FFP-Jahrestagung |
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Vor dem obersten Ziel der klassischen Ausbildungsskala für Pferde, die Versammlung, steht das Geraderichten. Ein jedes Pferd ist jedoch von Geburt an asymmetrisch, also schief. Hinter dieser Schiefe verbirgt sich nicht nur die natürliche Schiefe (asymmetrische muskuläre Entwicklung der beiden Körperhälften), die von Geburt an zu beobachten ist, sondern auch die sensorische und motorische Lateralität, also dem ungleichmäßigen Gebrauch der rechten oder linken Sinnesorgane sowie Gliedmaßen, der sich mit der Reifung des Gehirns entwickelt. Alle drei müssen als eigenständige Faktoren, die sich gegenseitig beeinflussen, gesehen werden (Krüger 2014). Um den Weg des Geraderichtens zu erleichtern, sollte in der Ausbildung eines Pferdes nicht nur an der natürlichen Schiefe gearbeitet werden, sondern auch die sensorische und motorische Lateralität beachtet werden um den Prozess des Geraderichtens für das Pferd zu erleichtern. Die sensorische und motorische Lateralität resultiert aus der Aufgabenteilung/Spezialisierung beider Gehirnhälften (Hemisphären) (Rogers 2010). Die rechte Hemisphäre ist dabei für die Verarbeitung von Emotionen (z.B. Angst, Aggression, Freude, Zufriedenheit) sowie für lebenserhaltende Spontanreaktionen zuständig. Die linke Hemisphäre ist für die rationale Verarbeitung von Informationen essentiell (Adolphs et al. 1996, Rogers 2010, Austin und Rogers 2012, De Boyer Des Roches et al. 2008, Demaree et al. 2005, Austin und Rogers 2014). Rückschlüsse auf die Informationsverarbeitung lassen sich über die Beobachtung der verwendeten Sinnesorgane (Ohren und Augen) ziehen, die kontralateral mit den Großhirnhemisphären verbunden sind (Brooks et al. 1999). Es wird vermutet, dass Stress zu einer verstärkten Informationsverarbeitung durch die rechte Großhirnhemisphäre führt (Rogers 2010, Schultheiss et al. 2009). Diese konnte auch in ersten Untersuchungen am Pferd bestätigt werden (unveröffentlichte Daten). Forscher, die den einseitigen Gebrauch von rechten und linken Gliedmaßen (motorische Lateralität) bei Menschen und Tieren untersuchten, zeigten weiterhin Zusammenhänge zur Emotionalität und Reaktivität (McGreevy und Thomson 2006, Rogers 2009, Austin und Rogers 2012, Deesing und Grandin 2014). Die Tendenz zum einseitigen Gebrauch der Gliedmaßen gibt Hinweise auf den „Cognitive Bias“ (= individuelle, kognitive Verzerrung der Wahrnehmung und Verarbeitung von Informationen ins Positive oder Negative) und steht im Zusammenhang mit der persönlichen Neigung auf Stressfaktoren zu reagieren (zusammengefasst von Rogers 2010). Die sensorische Lateralität ändert sich jedoch schneller und situationsgebundener als die motorische Lateralität. Sie wird mittels Objekttests bestimmt, die ebenfalls verwendet werden können um die Reaktivität und Emotionalität zu untersuchen. Für eine objektivere Beurteilung des Interieurs eines Pferdes ist daher zu überlegen, ob die sensorische Lateralität als objektiver Parameter integriert werden kann, welchen Einflüssen diese unterliegt und mit welchen Persönlichkeitsmerkmalen sie korreliert. Wie in der Studie von Farmer et al. (2010) dargestellt werden konnte, zeigten bilateral trainierte Pferde eine weniger stark ausgeprägte Präferenz für die linken Sinnesorgane als traditionell trainierte Pferde in Tests mit Personen (ohne Interaktion). Es stellt sich daher die Frage, ob diese Beobachtung ein Resultat von langjährigem Training ist oder ob es sich bereits nach wenigen Wochen Training einstellt sowie ob solche Entwicklungen auch bei Objekten beobachtet werden können.
Für die erste Untersuchung ergaben sich daher in dieser Studie folgende Fragstellungen: Sind die Ergebnisse eines Objekttests mit Evaluierung der sensorischen Lateralität hinsichtlich der Lateralität wiederholbar? Denn, sollte es möglich sein mittels der sensorische Lateralität auf bestimmte
Persönlichkeitsmerkmale rückschließen zu können, so muss diese genauso stabil und reproduzierbar sein, wie die betreffenden Persönlichkeitsmerkmale. Unterscheiden sich Pferde hinsichtlich ihrer Lateralität in Objekttests, die bereits intensiv gleichmäßig beidseitig trainiert wurden, von Pferden, bei denen weniger Augenmerk auf gleichmäßiges beidseitiges Training gelegt wurde? Kann die Lateralität in Objekttests mit einer definierten gleichmäßigen beidseitigen Trainingsmethode beeinflusst werden? In welche Richtung verschiebt sich gegebenenfalls die Lateralität? Beeinflusst das Alter gegebenenfalls das Ausmaß von Veränderungen, da sich die sensorische Lateralität mit der Reifung des Gehirns entwickelt? |
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Equine Behaviour @ team @ |
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5961 |
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Brubaker, L.; Udell, M.A.R. |
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Cognition and learning in horses (Equus caballus): What we know and why we should ask more |
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2016 |
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Behavioural Processes |
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126 |
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121-131 |
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Horse behaviour; Horse welfare; Learning; Social cognition |
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Abstract Horses (Equus caballus) have a rich history in their relationship with humans. Across different cultures and eras they have been utilized for work, show, cultural rituals, consumption, therapy, and companionship and continue to serve in many of these roles today. As one of the most commonly trained domestic animals, understanding how horses learn and how their relationship with humans and other horses impacts their ability to learn has implications for horse welfare, training, husbandry and management. Given that unlike dogs and cats, domesticated horses have evolved from prey animals, the horse-human relationship poses interesting and unique scientific questions of theoretical value. There is still much to be learned about the cognition and behaviour of horses from a scientific perspective. This review explores current research within three related areas of horse cognition: human-horse interactions, social learning and independent learning in horses. Research on these topics is summarized and suggestions for future research are provided. |
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Equine Behaviour @ team @ |
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6021 |
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Rochais, C.; Henry, S.; Fureix, C.; Hausberger, M. |
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Investigating attentional processes in depressive-like domestic horses (Equus caballus) |
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2016 |
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Behavioural Processes |
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124 |
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93-96 |
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Horses; Attention; Cognition; Welfare; Depression |
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Abstract Some captive/domestic animals respond to confinement by becoming inactive and unresponsive to external stimuli. Human inactivity is one of the behavioural markers of clinical depression, a mental disorder diagnosed by the co-occurrence of symptoms including deficit in selective attention. Some riding horses display ‘withdrawn’ states of inactivity and low responsiveness to stimuli that resemble the reduced engagement with their environment of some depressed patients. We hypothesized that ‘withdrawn’ horses experience a depressive-like state and evaluated their level of attention by confronting them with auditory stimuli. Five novel auditory stimuli were broadcasted to 27 horses, including 12 ‘withdrawn’ horses, for 5 days. The horses’ reactions and durations of attention were recorded. Non-withdrawn horses reacted more and their attention lasted longer than that of withdrawn horses on the first day, but their durations of attention decreased over days, but those of withdrawn horses remained stable. These results suggest that the withdrawn horses’ selective attention is altered, adding to already evidenced common features between this horses’ state and human depression. |
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Equine Behaviour @ team @ |
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6023 |
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Löckener, S.; Reese, S.; Erhard, M.; Wöhr, A.-C. |
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Pasturing in herds after housing in horseboxes induces a positive cognitive bias in horses |
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2016 |
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Journal of Veterinary Behavior: Clinical Applications and Research |
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11 |
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50-55 |
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judgment bias; affect; environmental enrichment; well-being; discrimination task; horse |
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Abstract Horses are kept in various housing systems, for example, with conspecifics in horse pens or singly in horseboxes, with or without pasturing. To provide appropriate living conditions for horses, it is necessary to know in which conditions they feel well or unwell. Here, a cognitive bias assessment provides information about an individual's affective state and its well-being. When a positive affective state prevails, animals tend to judge optimistically in ambiguous situations. When a negative affective state prevails, animals judge pessimistically in unclear situations. In the present study, we trained horses on a spatial discrimination task and evaluated their judgment of ambiguous locations when they had access to pastures and contact to conspecifics versus when they were kept singly in horseboxes. Ten days of pasturing and contact with conspecifics after being kept singly in horseboxes for 6 months induced a positive cognitive bias in the horses. We suggest that horses need to act out certain behaviors like exploration, social interaction, play, or grooming to fulfill their needs. After a time in which they were individually in horseboxes without pasturing and access to the herd, they seem to have a positive cognitive bias once they have access to pastures and conspecifics. This positive cognitive bias effect seems to disappear over time, as horses appear to adapt to the circumstances. |
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1558-7878 |
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Equine Behaviour @ team @ |
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6024 |
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Ward, A; Webster, M. |
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Sociality: The Behaviour of Group-Living Animals |
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2016 |
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Covers the aspects of social behaviour of animals in comprehensive form Provides a clear overview to up-to-date empirical and theoretical research on social animal behaviour
Discusses collective animal behaviour, social networks and animal personality in detail
The last decade has seen a surge of interest among biologists in a range of social animal phenomena, including collective behaviour and social networks. In ‘Animal Social Behaviour’, authors Ashley Ward and Michael Webster integrate the most up-to-date empirical and theoretical research to provide a new synthesis of the field, which is aimed at fellow researchers and postgraduate students on the topic. ​ |
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Equine Behaviour @ team @ |
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6156 |
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Bailey, D |
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Dominance Hierarchies in Horses: Comparing and Contrasting Different Methods for Assessing Hierarchies |
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2016 |
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Ursidae: The Undergraduate Research Journal at the University of Northern Colorado |
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5 |
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3 |
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Understanding animal social structures is imperative when it comes to the care, housing and handling of large herd animals. Knowing how hierarchies are structured, along with environmental and physiological aspects that may affect them, will allow owners and breeders to house and care for their animals. The aim of my study was to better understand two methods used to assess dominance hierarchies in horses, Equus caballus, and to predict which method would be more useful for owners housing domestic horses. I designed an experiment where I compared a structured method, the paired feeding test, with behavioral observations from the horses’ natural setting. I hypothesized that the structured method would not conclude the same dominance hierarchy as the natural observations. I also hypothesized that traits of the horses, such as size or age, would correlate with the hierarchy ranking within a herd. A herd of six individual horses from a small ranch east of Platteville, Colorado was used to test the two methods. I found that the two methods measured different hierarchies. The paired feeding test showed no correlations to any of the physical measurements, as well as did not provide a hierarchy that was similar to the natural dominance observations of the horses. Natural observations established a more linear hierarchy and had significant correlations with weight and overall body size. The results indicate that the paired feeding test may not be a valid method for establishing dominance hierarchies within domestic horses housed in a small range.
I recommend use of natural observations over paired feeding tests for ranchers, breeders or owners trying to understand the dominance hierarchies among their herds. |
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Equine Behaviour @ team @ |
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6204 |
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Pick, M.; Pick, J.; Rahn, A.; Wolff, N. |
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Artgerechte Haltung von Pferden: Sachverständige Empfehlungen zur Pferdehaltung aus Sicht des Tierschutzes |
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2016 |
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Tredition GmbH |
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Equine Behaviour @ team @ |
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6616 |
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Imbert, C.; Caniglia, R.; Fabbri, E.; Milanesi, P.; Randi, E.; Serafini, M.; Torretta, E.; Meriggi, A. |
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Why do wolves eat livestock?: Factors influencing wolf diet in northern Italy |
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2016 |
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Biological Conservation |
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195 |
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156-168 |
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Scat analysis; Feeding ecology; Prey selection; Wolf-human conflicts |
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Thanks to protection by law and increasing habitat restoration, wolves (Canis lupus) are currently re-colonizing Europe from the surviving populations of Russia, the Balkan countries, Spain and Italy, raising the need to update conservation strategies. A major conservation issue is to restore connections and gene flow among fragmented populations, thus contrasting the deleterious consequences of isolation. Wolves in Italy are expanding from the Apennines towards the Alps, crossing the Ligurian Mountains (northern Italy) and establishing connections with the Dinaric populations. Wolf expansion is threatened by poaching and incidental killings, mainly due to livestock depredations and conflicts with shepherds, which could limit the establishment of stable populations. Aiming to find out the factors affecting the use of livestock by wolves, in this study we determined the composition of wolf diet in Liguria. We examined 1457 scats collected from 2008 to 2013. Individual scats were genotyped using a non-invasive genetic procedure, and their content was determined using microscopical analyses. Wolves in Liguria consumed mainly wild ungulates (64.4%; in particular wild boar Sus scrofa and roe deer Capreolus capreolus) and, to a lesser extent, livestock (26.3%; in particular goats Capra hircus). We modeled the consumption of livestock using environmental features, wild ungulate community diversity, husbandry characteristics and wolf social organization (stable packs or dispersing individuals). Wolf diet varied according to years and seasons with an overall decrease of livestock and an increase of wild ungulate consumption, but also between packs and dispersing individuals with greater livestock consumption for the latter. The presence of stable packs, instead of dispersing wolves, the adoption of prevention measures on pastures, roe deer abundance, and the percentage of deciduous woods, reduced predation on livestock. Thus, we suggest promoting wild ungulate expansion, the use of prevention tools in pastures, and supporting wolf pack establishment, avoiding lethal control and poaching, to mitigate conflicts between wolf conservation and husbandry. |
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0006-3207 |
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Equine Behaviour @ team @ |
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6621 |
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Hoelker, S. |
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Typologie der deutschen Pferdehaltung – Eine empirische Studie mittels Two-Step-Clusteranalyse |
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2016 |
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Berichte über Landwirtschaft Zeitschrift für Agrarpolitik und Landwirtschaft |
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94 |
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3 |
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BMEL |
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Bonn |
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Equine Behaviour @ team @ |
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6643 |
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Marinsek, N.L.; Gazzaniga, M.S.; Miller, M.B. |
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Chapter 17 – Split-Brain, Split-Mind |
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2016 |
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The Neurology of Conciousness (Second Edition) |
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271-279 |
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Split-brain; consciousness; lateralization; modular; left hemisphere interpreter |
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The corpus callosum anatomically and functionally connects the two cerebral hemispheres. Despite its important role in interhemispheric communication however, severing the corpus callosum produces few--if any--noticeable cognitive or behavioral abnormalities. Incredibly, split-brain patients do not report any drastic changes in their conscious experience even though nearly all interhemispheric communication ceases after surgery. Extensive research has shown that both hemispheres remain conscious following disconnection and the conscious experience of each hemisphere is private and independent of the other. Additionally, the conscious experiences of the hemispheres appear to be qualitatively different, such that the consciousness of the left hemisphere is more enriched than the right. In this chapter, we offer explanations as to why split-brain patients feel unified despite possessing dual conscious experiences and discuss how the divided consciousness of split-brain patients can inform current theories of consciousness. |
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Academic Press |
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San Diego |
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Laureys, S.; Gosseries, O.; Tononi, G. |
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978-0-12-800948-2 |
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Equine Behaviour @ team @ |
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6648 |
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