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Author |
Kratzer, D.D.; Netherland, W.M.; Pulse, R.E.; Baker, J.P. |
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Title |
Maze Learning in Quarter Horses |
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1977 |
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Journal of Animal Science |
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J. Anim Sci. |
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45 |
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4 |
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896-902 |
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A two-compartment maze providing a single left- or right-side choice was used to test maze-learning ability in 37 quarter horses. Preference for left- or right-side choices varied among the horses. The taller and thinner horses tended to go left. The horses showed learning ability based on decreases in latency and decreases in errors as trials progressed in a right-side escape pattern. The rate of learning an opposite escape pattern, left-side escape, was faster but owing to the large number of errors occurring when the pattern was reversed, the level of errors did not reduce to a level comparable to that achieved in the right-side escape pattern until adverse stimuli were presented in the blind compartment. Heavier horses took longer to escape from the maze when adverse stimuli were presented. Differences in learning ability for horses fed various levels of dietary protein were not consistent. N1 - |
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Equine Behaviour @ team @ |
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3574 |
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Author |
Bailey, D |
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Title |
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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Author |
Klingel H, |
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Title |
The behavior of horses (Equidae) |
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1972 |
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Handbuch der Zoologie |
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Handb. Zoolog. |
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8 |
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1-68 |
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McDonnel, S. (Translator) |
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from Professor Hans Klingels Equine Reference List |
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1298 |
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Moons, C.; Heleski, C.R.; Leece, C.M.; Zanella, A.J. |
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Title |
Conflicting Results in the Association Between Plasma and Salivary Cortisol Levels in Foals |
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2002 |
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Havemeier Workshop |
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Introduction
Glucocorticoids are present in many biological fluids as a free fraction or bound to Corticoid
Binding Globulins (CBG) (Matteri et al, 2000). There are conflicting claims regarding the validity of
saliva as a biological fluid to measure cortisol in horses (Lebelt et al, 1996; McGreevy and Pell, 1998;
van der Kolk et al, 2001). Measuring changes in salivary cortisol levels in normal horses and horses
with Cushing`s disease van der Kolk and collaborators (2001) demonstrated the validity of saliva to
assess adrenal function. Puzzling results were reported by McGreevy and Pell (1998) who suggested
that plasma and salivary cortisol concentrations in horses showing oral stereotypies were correlated
but this association was non-existent in control animals. Investigating the responses of foals to
branding and foot-trimming Zanella et al (unpublished results) were unable to identify a relationship
between plasma and salivary cortisol levels in foals. In several species, levels of cortisol in plasma and
saliva are tightly correlated (Fenske, 1996). Cortisol found in blood consists of a fraction bound to
corticoid binding globulin (CBG) and a free, unbound fraction. Free cortisol represents the
biologically active fraction of this steroid hormone. Salivary cortisol reflects the unbound fraction
found in plasma or serum and it passes readily through the parotid membrane (Riad-Fahmy, 1983;
Horning Walker et al,1977). Unbound steroids transfer rapidly between plasma and saliva
(Walker,1989; Scott et al 1990). Saliva flow-rate does not appear to influence saliva cortisol levels in
different species (Hubert and de Jong-Meyer, 1989; Walker 1989, Scott et a, 1990). In horses, Lebelt
et al (1996) reported that salivary and plasma total cortisol in stallions were correlated. We
hypothesized that changes in salivary cortisol in foals would show a pattern that is correlated to that of
plasma free and plasma total cortisol concentrations in foals. In addition, we anticipated that the lack
of good sampling techniques provides an explanation for the failure in determining the association
between salivary and plasma cortisol in foals. |
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refbase @ user @ |
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470 |
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Author |
McGreevy, P.D. |
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Title |
Development and Resolution of Behavioural Problems with the |
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Havemeier Workshop |
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The ideals of equestrian technique combine art and science. Therefore students of equitation
encounter measurable variables such as rhythm, tempo and impulsion alongside more ethereal ones
such as outline and harmony. This mixture accounts for many of the idiosyncrasies of equestrianism
including the subjective scoring of performance in dressage tests, the elusiveness of perfection even at
an elite level of competition and the difficulty of expressing equestrian technique in empirical terms
(Roberts, 1992).
This chapter will describe and offer examples of the unwelcome behavioural responses horses
produce under saddle. Two broad sections are then proposed to allow the reader to consider
unwelcome behavioural responses caused directly by humans as distinct from those attributable more
to the horse than the rider. Ultimately the responsibility for problems in the ridden horse lies with
humans since we have undertaken the domestication and exploitation of equids. Therefore it is
accepted that the dichotomy is not absolute. The chapter closes with a |
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471 |
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Author |
Feh, C. |
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Title |
Relationships and Communication in Socially Natural Horse Herds |
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2005 |
Publication |
The domestic horse : the origins, development, and management of its behaviour |
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The domestic horse : the origins, development, and management of its behaviour |
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Horses are quite unique. In most mammals, sexes segregate and maintain bonds only during the breeding season (Clutton-Brock, 1989). Some canids, a few rodents and primate species such as gorillas, hamadryas baboons and red howler monkeys are the exception, where the same males stay with the same females all year round and over many breeding seasons. Typically, both sexes disperse at puberty in these species. In horses, it was clearly shown that the causes for female dispersal were incest avoidance and not intra-specific competition (Monard, 1996). As a rule, this is confirmed for mammal species where tenure length by males exceeds the age at first reproduction in females (Clutton-Brock, 1989). When horses are allowed to choose their mating partner freely, the inbreeding coefficient of the offspring is lower than expected should they mate randomly (Duncan et al, 1984). |
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Cambridge University Press 2005 |
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Cambridge |
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Mills, D. S. ; McDonnell, , S. M. |
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13 978-0-521-81414-6 |
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refbase @ user @; Equine Behaviour @ team @ room B 3.092 |
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472 |
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Author |
Hausberger, M.; Richard-Yris, M.-A. |
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Title |
Individual differences in the domestic horse, origins, development and stability |
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2005 |
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The domestic horse : the origins, development, and management of its behaviour |
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33-52 |
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Cambridge University Press 2005 |
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Cambridge |
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Mills, D.S.; McDonnell, |
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13 978-0-521-81414-6 |
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Equine Behaviour @ team @ Feh2005 |
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4819 |
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Author |
Feh, C. |
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Title |
Alliances between stallions are more than just multimale groups: reply to Linklater & Cameron (2000) |
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2001 |
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Animal Behaviour. |
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Anim. Behav. |
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61 |
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F27-F30 |
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513 |
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WAYNE L. LINKLATER & ELISSA Z. CAMERON |
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Title |
Distinguishing cooperation from cohabitation: the feral horse case |
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2000 |
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Animal Behaviour. |
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Anim. Behav. |
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59 |
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F17-F21 |
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514 |
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Author |
Nathan J. Emery |
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Title |
The Evolution of Social Cognition |
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2005 |
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The Cognitive Neuroscience of Social BehaviourGarten |
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Although this bookis focusedon the cognitive neuroscience ofhuman social behaviour, an
understandingofsocial cognition in non-human animals is critical for unravellingthe neural basis of
social cognition in humans as well as the selective pressures that have shapedthe evolution ofcomplex
social cognition. Thanks to methodological limitations, we know little about the relationships between
certain biochemical andelectrophysiological properties ofthe human brain andhow theycompute the
behaviour andmental states ofother individuals. Traditional techniques for examiningneural function
in humans, such as event-relatedpotentials (ERP),positron emission tomography(PET),and
functional magnetic resonance imaging(fMRI),are constrainedbythe fact that subjects are placed
either into an immoveable scanner with a lot ofbackgroundnoise or wiredup with dozens of
electrodes that are sensitive to slight movements. The possibilityofscanningor recordingbrain waves
from two individuals that are physicallyinteractingsociallyis technicallyimpossible at present
(however, see Montague et al, 2002 for a new methodfor simultaneouslyscanningtwo individuals
interactingvia a computer).
The onlywayto understandthe neurocognitive architecture ofhuman social behaviour is to examine
similar social processes in both human andnon-human animal minds andmake comparisons at the
species level. An additional argument is that traditional human socio-cognitive tasks are dependent on
the use ofstories, cartoons andverbal cues andinstructions (Heberlein & Adolphs, this volume)which
themselves will elicit specific neural responses that have to be eliminatedfrom neural responses
specificallyrelatedto mindreading. Therefore, the development ofnon-verbal tasks wouldprovide a
breakthrough for studies in non-linguistic animals, pre-verbal human infants andhuman cognitive
neuroimaging. |
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Psychology Press |
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