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Author |
Argue, C.K.; Clayton, H.M. |
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Title |
A preliminary study of transitions between the walk and trot in dressage horses |
Type |
Journal Article |
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Year |
1993 |
Publication |
Acta Anatomica |
Abbreviated Journal |
Acta Anat (Basel) |
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Volume |
146 |
Issue |
2-3 |
Pages |
179-182 |
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Keywords |
Animals; Forelimb/physiology; Gait/*physiology; Hindlimb/physiology; Horses/*physiology; Locomotion/physiology; *Physical Conditioning, Animal |
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Abstract |
The object of this study was to determine the limb support sequence during the transitions from walk to trot and from trot to walk in dressage horses under saddle and to test the null hypothesis that the limb support sequence during the transitions is not related to the level of training. Sixteen dressage horses training at novice to FEI Grand Prix level were videotaped performing an average of 9 transitions each from walk to trot and from trot to walk. The 30-Hz videotapes were viewed in slow motion, and based on the limb support sequence the transitions were categorized into two types. In type 1 transitions there were no intermediate steps between the walk and trot sequences. Type 2 transitions were characterized by intermediate steps, including a single support phase. The Kendall rank-order correlation coefficient showed that a higher level of training was positively associated with an increased percentage of type 1 transitions for both walk-to-trot transitions (p < or = 0.05) and trot-to-walk transitions (p < or = 0.01). No significant preference for initiating or completing the trot on the left or right diagonal was found using the binomial test for individual horses and the Wilcoxon signed-ranks test for the group. |
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Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada |
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0001-5180 |
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PMID:8470463 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3752 |
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Author |
Colahan, P.; Lindsey, E.; Nunier, C. |
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Title |
Determination of the center of pressure of the hoofs of the forelimbs of horses standing on a flat level surface |
Type |
Journal Article |
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Year |
1993 |
Publication |
Acta Anatomica |
Abbreviated Journal |
Acta Anat (Basel) |
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Volume |
146 |
Issue |
2-3 |
Pages |
175-178 |
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Keywords |
Animals; Forelimb/*physiology; Hoof and Claw/*physiology; Horses/*physiology; *Posture; Pressure |
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Abstract |
The pressure exerted on a flat level surface by recently trimmed, unshod hoofs of the front limbs of 23 sound, adult horses was measured using pressure-sensitive film and a specially built cassette. The horses were tranquilized and stood with one foot on the 2.9-cm-thick cassette and the other on a block of equal height. The hoofs were observed for motion during the measurement, and the developed film was examined for improper alignment of the film or slipping of the hoof. The center of pressure was located using the method of weighted proportions of Barrey. This static measurement system with a long measurement time and the number of measurements reduced the influence of variables inherent in the horses' behavior and the measuring system. The calculated point was recorded as falling medial to, lateral to or on a line bisecting the central sulcus of the frog. In the dorsal to palmar orientation the point was classified with reference to a line drawn halfway between the most dorsal and the most palmar mark on the film. Forty-six percent of the calculated centers of pressure were located in the medial heel area. Binomial analysis for large samples indicates that this was a significant variation from a random distribution. Seventy-six percent of the centers were located in or on the borders of the medial heel. |
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College of Veterinary Medicine, University of Florida, Gainesville 32608-0136 |
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0001-5180 |
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PMID:8470462 |
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Call Number |
refbase @ user @ |
Serial |
1946 |
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Author |
Kirkpatrick, J.F.; Wiesner, L.; Kenney, R.M.; Ganjam, V.K.; Turner, J.W. |
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Title |
Seasonal variation in plasma androgens and testosterone in the North American wild horse |
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Journal Article |
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Year |
1977 |
Publication |
The Journal of endocrinology |
Abbreviated Journal |
J Endocrinol |
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Volume |
72 |
Issue |
2 |
Pages |
237-238 |
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Keywords |
Androgens/*blood; Animals; Horses/*blood; Male; *Seasons; Testosterone/*blood |
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0022-0795 |
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PMID:845536 |
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Call Number |
refbase @ user @ |
Serial |
148 |
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Author |
McClure, S.R.; Chaffin, M.K. |
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Title |
Self-mutilative behavior in horses |
Type |
Journal Article |
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Year |
1993 |
Publication |
Journal of the American Veterinary Medical Association |
Abbreviated Journal |
J Am Vet Med Assoc |
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Volume |
202 |
Issue |
2 |
Pages |
179-180 |
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Keywords |
Animals; *Behavior, Animal; *Horse Diseases; Horses; Male; *Self Mutilation |
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0003-1488 |
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Notes |
PMID:8428817 |
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refbase @ user @ |
Serial |
1944 |
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Author |
Forbes, A.B. |
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Title |
A review of regional and temporal use of avermectins in cattle and horses worldwide |
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Journal Article |
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Year |
1993 |
Publication |
Veterinary Parasitology |
Abbreviated Journal |
Vet Parasitol |
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Volume |
48 |
Issue |
1-4 |
Pages |
19-28 |
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Keywords |
Animals; Anthelmintics/therapeutic use; Arthropods; Cattle; Cattle Diseases/drug therapy/*prevention & control; Ectoparasitic Infestations/drug therapy/prevention & control/veterinary; Horse Diseases/drug therapy/*prevention & control; Horses; Insecticides; Ivermectin/*analogs & derivatives/*therapeutic use; Nematode Infections/drug therapy/prevention & control/veterinary; Parasitic Diseases/drug therapy/prevention & control; *Parasitic Diseases, Animal |
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Abstract |
Ivermectin and abamectin are two members of the group of parasiticides known as the avermectins; ivermectin was first registered as an injectable treatment for cattle in 1981. Since then, abamectin has been registered for cattle and ivermectin for horses. The relative popularity of the avermectins amongst farmers and veterinarians can be attributed to their spectrum of activity, convenience, wide margin of safety and the improved health and performance of stock following their use. Patterns of use in grazing animals apply equally to the avermectins as to other antiparasitics, particularly anthelmintics; these are based on a knowledge of epidemiology integrated with practical management considerations. For cattle, programs are commonly aimed at control of abomasal nematodes of the genera Ostertagia and Haemonchus. Use of avermectins is largely strategic in cattle, treatments being favored at the end of the period of transmission of these parasites; this frequently coincides with housing, entry into a feedlot or movement to another pasture. Simultaneous control of important ectoparasites at this time is an added benefit. Prophylactic use of avermectins at pasture is primarily targeted at the young first season grazing animal. In horses, a bimonthly treatment schedule during the period of risk has proved effective in helping prevent adverse effects of the main target parasites, including large and small strongyles and stomach bots. These patterns of use can be applied to the evaluation of the potential for avermectin residues in feces to have impact on pasture ecology. The evidence presented suggests that any effects are temporally and spatially limited. After more than a decade of practical use, there is no indication that avermectins have had a significant impact on pasture ecology and the environment. |
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Address |
MERCK AgVet, Rahway, NJ 07065-0912 |
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ISSN |
0304-4017 |
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Notes |
PMID:8346632 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2665 |
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Author |
Stadler, P.; Rewel, A.; Deegen, E. |
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Title |
[M-mode echocardiography in dressage horses, class S jumping horses and untrained horses] |
Type |
Journal Article |
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Year |
1993 |
Publication |
Zentralblatt fur Veterinarmedizin. Reihe A |
Abbreviated Journal |
Zentralbl Veterinarmed A |
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Volume |
40 |
Issue |
4 |
Pages |
292-306 |
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Keywords |
Animals; Echocardiography/*veterinary; Female; Heart Septum/ultrasonography; Heart Ventricles/ultrasonography; Horses/*anatomy & histology; Male; *Physical Conditioning, Animal; Reference Values |
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Abstract |
Heart structures of 45 warmblooded horses were measured by M-mode-echocardiography. The current training level of 15 dressage horses (group I) and 15 show-jumping horses (group II) was category “S”. In the third group were 15 untrained horses. Four standardized transducer positions were determined for the m-mode echobeam, calibrated according to the two-dimensional real time technique. End systolic and end diastolic diameters of left ventricle, right ventricle, aortic root, interventricular septum and left ventricular wall, as well as motion pattern of heart wall, mitral valve and aortic valve of all horses were measured. The dressage horses showed a significant thickening of interventricular septum and left-ventricular wall compared with the show-jumping horses and the untrained horses. The end diastolic left ventricle diameter of the show-jumping horses was significantly larger than in the other groups. Compared to the untrained horses the show-jumping horses showed a significantly larger end systolic left ventricular wall diameter measured at the level of papillary muscle. It can be concluded, that an increase in heart mass in category “S” sport horses is attributed to their level of training. |
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Klinik fur Pferde der Tierarztlichen Hochschule Hannover |
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German |
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Original Title |
Die M-mode-Echokardiographie bei S-Dressur-, S-Springpferden und bei untrainierten Pferden |
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ISSN |
0514-7158 |
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Notes |
PMID:8342361 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3749 |
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Author |
Clayton, H.M. |
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Title |
Development of conditioning programs for dressage horses based on time-motion analysis of competitions |
Type |
Journal Article |
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Year |
1993 |
Publication |
Journal of Applied Physiology (Bethesda, Md. : 1985) |
Abbreviated Journal |
J Appl Physiol |
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Volume |
74 |
Issue |
5 |
Pages |
2325-2329 |
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Keywords |
Animals; Horses/*physiology; *Physical Conditioning, Animal; *Sports; Statistics; Time Factors; *Time and Motion Studies; Videotape Recording |
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Abstract |
The time-motion characteristics of Canadian basic- and medium-level dressage competitions are described, and the results are applied in formulating sport-specific conditioning programs. One competition was analyzed at the six levels from basic 1 to medium 3. Each test was divided into a series of sequences based on the type and speed of activity. The durations of the sequences were measured from videotapes. The basic-level tests had fewer sequences, and they were shorter in distance and duration than the medium tests (P < 0.10), but the average speed did not differ between the two levels. It is recommended that horses competing at the basic levels be conditioned using 5-min exercise periods, with short (10-s) bursts of lengthened trot and canter included at basic 2 and above. In preparation for medium-level competitions, the duration of the work periods increases to 7 min, 10- to 12-s bursts of medium or extended trot and canter are included, and transitions are performed frequently to simulate the energy expenditure in overcoming inertia. |
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Department of Veterinary Anatomy, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada |
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ISSN |
8750-7587 |
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PMID:8335563 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3750 |
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Author |
Dougherty, D.M.; Lewis, P. |
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Title |
Generalization of a tactile stimulus in horses |
Type |
Journal Article |
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Year |
1993 |
Publication |
Journal of the Experimental Analysis of Behavior |
Abbreviated Journal |
J Exp Anal Behav |
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Volume |
59 |
Issue |
3 |
Pages |
521-528 |
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Keywords |
Animals; Behavior, Animal; Female; *Horses; Male; Reinforcement (Psychology); *Touch |
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Abstract |
Using horses, we investigated the control of operant behavior by a tactile stimulus (the training stimulus) and the generalization of behavior to six other similar test stimuli. In a stall, the experimenters mounted a response panel in the doorway. Located on this panel were a response lever and a grain dispenser. The experimenters secured a tactile-stimulus belt to the horse's back. The stimulus belt was constructed by mounting seven solenoids along a piece of burlap in a manner that allowed each to provide the delivery of a tactile stimulus, a repetitive light tapping, at different locations (spaced 10.0 cm apart) along the horse's back. Two preliminary steps were necessary before generalization testing: training a measurable response (lip pressing) and training on several reinforcement schedules in the presence of a training stimulus (tapping by one of the solenoids). We then gave each horse two generalization test sessions. Results indicated that the horses' behavior was effectively controlled by the training stimulus. Horses made the greatest number of responses to the training stimulus, and the tendency to respond to the other test stimuli diminished as the stimuli became farther away from the training stimulus. These findings are discussed in the context of behavioral principles and their relevance to the training of horses. |
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Human Behavioral Pharmacology Laboratory, University of Texas Health Science Center, Houston 77030 |
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ISSN |
0022-5002 |
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PMID:8315368 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3571 |
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Author |
Beveridge, W.I. |
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Title |
Unravelling the ecology of influenza A virus |
Type |
Journal Article |
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Year |
1993 |
Publication |
History and Philosophy of the Life Sciences |
Abbreviated Journal |
Hist Philos Life Sci |
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Volume |
15 |
Issue |
1 |
Pages |
23-32 |
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Keywords |
Animals; Bird Diseases/epidemiology/*history/microbiology; Birds; Ecology; History, 20th Century; Horse Diseases/epidemiology/*history/microbiology; Horses; Humans; Influenza A virus/*isolation & purification; Influenza, Human/epidemiology/*history/microbiology/*veterinary; Swine; Swine Diseases/epidemiology/*history/microbiology; Zoonoses/history |
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Abstract |
For 20 years after the influenza A virus was discovered in the early 1930s, it was believed to be almost exclusively a human virus. But in the 1950s closely related viruses were discovered in diseases of horses, pigs and birds. Subsequently influenza A viruses were found to occur frequently in many species of birds, particularly ducks, usually without causing disease. Researchers showed that human and animal strains can hybridise thus producing new strains. Such hybrids may be the cause of pandemics in man. Most pandemics have started in China or eastern Russia where many people are in intimate association with animals. This situation provides a breeding ground for new strains of influenza A virus. |
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ISSN |
0391-9714 |
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PMID:8310117 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2667 |
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Permanent link to this record |
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Author |
Houpt, K.A.; Feldman, J. |
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Title |
Animal behavior case of the month. Aggression toward a neonatal foal by its dam |
Type |
Journal Article |
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Year |
1993 |
Publication |
Journal of the American Veterinary Medical Association |
Abbreviated Journal |
J Am Vet Med Assoc |
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Volume |
203 |
Issue |
9 |
Pages |
1279-1280 |
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Keywords |
Animals; Animals, Newborn; *Behavior, Animal; Female; Follow-Up Studies; Horses/*psychology; *Maternal Behavior; Rejection (Psychology); Restraint, Physical/veterinary |
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Abstract |
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Address |
Department of Physiology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853-6401 |
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0003-1488 |
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Notes |
PMID:8253618 |
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no |
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Call Number |
refbase @ user @ |
Serial |
36 |
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