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Caanitz, H.; O'Leary, L.; Houpt, K.; Petersson, K.; Hintz, H. |
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Title |
Effect of exercise on equine behavior |
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1991 |
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Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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31 |
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1-2 |
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1-12 |
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The effect of short periods of strenuous exertion, in this case treadmill exercise, on the subsequent behavior of Standardbred horses was examined. Six horses were exercised on a high-speed treadmill 4 or 5 days per week, for 3-4 miles (approximately 1.8 m s-1 for 3 min, 5 m s-1 for 12 min, 9 m s-1 for 3 min, 3 m s-1 for 3 min, 1.8 m s-1 for 3 min). The behavior of the horses was observed in the horse's home stall immediately after exercise and 2-7 h after exercise. Focal animal sampling for a total of 150 h revealed that the horses spent significantly more time drinking and less time resting after exercise than they did on control (non-exercise or rest days). The greatest influence on behavior was seen immediately after exercise. The horses spent 13.2+/-2.7 s per 15 min drinking after exercise and 7.2+/-2.3 s per 15 min drinking on non-exercise days. They spent 7.3+/-1.5 min h-1 stand resting after exercise and 9.7+/-2.1 min h-1 on non-exercise days. These changes in behavior may be related to the physiological changes that accompany exercise. Eating, walking, elimination and self-grooming were not significantly influenced by exercise. In a second experiment the activities of two groups of six Standardbred mares were compared. One group was exercised on the treadmill and the other was not. The exercised horses spent more time drinking and lying, but urinated less than the non-exercised group. |
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1989 |
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Kendrick, K.M. |
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How the sheep's brain controls the visual recognition of animals and humans |
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1991 |
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Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
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69 |
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12 |
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5008-5016 |
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Equine Behaviour @ team @ |
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2940 |
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Povinelli DJ; Parks KA; Novak MA |
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Do rhesus monkeys (Macaca mulatta) attribute knowledge and ignorance to others? |
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1991 |
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J. Comp. Psychol. |
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105 |
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318 |
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Equine Behaviour @ team @ |
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3032 |
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Sakura O; Matsuzawa T |
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Flexibility of wild chimpanzees nut-cracking behavior using stone hammers and anvils: an experimental analysis |
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1991 |
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Ethology |
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Ethology |
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87 |
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237 |
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Equine Behaviour @ team @ |
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3038 |
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Dugatkin, L.A.; Alfieri, M. |
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Title |
Guppies and the TIT FOR TAT strategy: preference based on past interaction |
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1991 |
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Behavioral Ecology and Sociobiology |
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Behav. Ecol. Sociobiol. |
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28 |
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4 |
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243-246 |
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The evolution of cooperation requires either (a) nonrandom interactions, such that cooperators preferentially interact with other cooperators, or (b) conditional behaviors, such that individuals act cooperatively primarily towards other cooperators. Although these conditions can be met without assuming sophisticated animal cognition, they are more likely to be met if animals can remember individuals with whom they have interacted, associate past interactions with these individuals, and base future behavior on this information. Here we show that guppies (Poecilia reticulata), in the context of predator inspection behavior, can identify and remember (for at least 4 h) the “more cooperative” among two conspecifics and subsequently choose to be near these individuals in future encounters. |
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Equine Behaviour @ team @ |
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3397 |
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Author |
Huizinga, H.A.; van der Werf, J.H.J.; Korver, S.; van der Meij, G.J.W. |
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Stationary performance testing of stallions from the Dutch Warmblood riding horse population. 1. Estimated genetic parameters of scored traits and the genetic relation with dressage and jumping competition from offspring of breeding stallions |
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Year |
1991 |
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Livestock Production Science |
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27 |
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2-3 |
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231-244 |
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dressage; genetic parameters; horse; jumping; performance; stallion |
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The stationary performance testing (SPT) of stallions as breeding candidates in the Dutch Warmblood riding horse population is evaluated. Genetic and phenotypic parameters of traits scored during SPT and the genetic correlation of these traits with performances in dressage and jumping competition from offspring of breeding stallions are estimated. Data from 1978-1988 are used, covering scores from 337 3-year-old stallions. Eight subjectively scored traits are considered. These traits are: walk; trot; canter; riding ability; show jumping; free jumping; cross country; character. SPT lasts for a period of 100 days. Data from SPT are analysed using an animal model. The relations between SPT of stallions and performances in jumping and dressage competition are analysed with an animal model for SPT data and a sire model for competition data. Variance and covariance components are estimated by restricted maximum likelihood (REML) procedures. Estimates of heritability are high (0.64) for gaits and riding ability, intermediate (0.41) for cross country and medium-high (0.31) for jumping. Estimated genetic correlation between show jumping scored during SPT and jumping in competition from offspring of breeding stallions is 0.84; for dressage this relation is 0.83. Some possible bias due to selection and the subjectivity of scoring is discussed. It is indicated that selection on SPT of stallions before entering breeding service is an effective tool to breed for ability of performance in competition. |
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refbase @ user @ |
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3962 |
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Huizinga, H.A.; Korver, S.; van der Meij, G.J.W. |
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Stationary performance testing of stallions from the Dutch Warmblood riding horse population. 2. Estimated heritabilities of and correlations between successive judgements of performance traits |
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1991 |
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Livestock Production Science |
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27 |
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2-3 |
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245-254 |
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dressage; genetic parameters; horse; jumping; performance; stallion |
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The length of test period of stationary performance testing (SPT) of stallions of the Dutch Warmblood riding horse population is evaluated. Heritability of successive judgements of traits and the phenotypic and genetic relations between successive judgements are estimated. Data from 1983-1988 are used, covering scores from 206 mostly 3-year-old stallions. Ten subjectively scored traits are considered: walk, trot, canter, riding ability, jumping ability, free jumping, cross country, character, stable behaviour, training report. Traits are successively scored at about 25, 50, 80 and 100 days in SPT. Missing scores are predicted on basis of the available scores using multiple partial regression coefficients. Validity of this method is checked in an independent data set for walk, trot and canter. The correlations between predicted and realized scores average 0.74, 0.77 and 0.79 when first, first and second, and first, second and third judgements are available, respectively. Variance and covariance components are estimated by restricted maximum likelihood (REML) procedures. Data from SPT are analysed using an animal model. Estimates of heritability are high and constant for gaits during the successive judgements. Except for stable behaviour estimates of heritability, the traits decrease slightly during the successive judgements. Estimates of the phenotypic and genetic correlations between successive judgements are high. It is concluded that length of SPT can be shortened and selection during SPT can be intensified. |
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3963 |
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Author |
Denoix, J.M. |
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Title |
Approche mecanique des allures et du saut chez le cheval |
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1991 |
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Science & Sports |
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6 |
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2 |
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117-124 |
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cheval; locomotion; biomecanique; horse; locomotion; biomechanics |
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Resume La locomotion du cheval implique des contraintes mecaniques elevees sur les os, les articulations, les muscles et les tendons. Son etude permet de mieux connaitre les interventions actives ou passives de ces organes au cours des allures et du saut. Ces elements sont utiles pour la mise en oeuvre rationnelle d'exercices d'entrainement chez le cheval de sport ou de courses, en fonction des exigences de la discipline et des eventuels problemes locomoteurs du sujet. L'etude mecanique de la locomotion du cheval est par ailleurs indispensable pour l'amelioration de la connaissance des boiteries. Elle permet de preciser la genese des lesions osteoarticulaires et musculo-tendineuses et contribue a ameliorer leur traitement.Summary Locomotion of the horse is correlated with a great variety of mechanical stresses on bones, joints, muscles and tendons. Research on locomotion increases the knowledge of passive and active interventions of these structures during gaits and jump. These data are useful to manage the training of sport and jump horses, especially to fit with the particularities of the sport speciality and individual locomotor problems of horses. Beside, studies of locomotion in the horse are of importance to improve the knowledge of lamenesses. They contribute to precise the pathogenesis of osteoarticular and musculotendinous injuries and improve their treatment. |
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3976 |
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Marinier, S.L.; Alexander, A.J. |
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Selective grazing behaviour in horses: development of methodology and preliminary use of tests to measure individual grazing ability |
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1991 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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30 |
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3-4 |
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203-221 |
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Methods are described to assess horses' selective grazing ability that includes choosing, sorting and the adaptive value of this behaviour. Choosing ability was tested by the experimenter presenting pairs of cut plant species that were then alternated at each presentation until the test horse had taken three bites of one of the plant pair. The results were analysed in relation to five measures of choosing behaviour: (1) the strength of the choice; (2) correspondence between first bite and the final choice; (3) constancy of the choice over a number of trials; (4) the comparison of the horses' ranking of the species over a number of trials; (5) the constancy of the linear arrangement of the plants over a number of trials. Sorting ability was tested using two methods. A mixture of two plant species was presented either in a clamp or loose in a trough. Results were based on number and weight of plant residues. The adaptive value of the behaviour related to the bitterness of toxic plants. This bitterness was represented in testing by quinine sulphate and a poisonous Senecio species. An extremely bitter substance “Bitrex” was also used in this context but was totally accepted by the horses. The horses' reactions to these substances were monitored using a behavioural score chart. The results from 12 horses revealed that the horses differed individually in their grazing ability. On this basis, the horses were classified as efficient, semi-efficient, or inefficient grazers. This finding has practical implications in deciding which horses may safely graze on pastures infested with toxic plants. |
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Equine Behaviour @ team @ |
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4230 |
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Luescher, U.A.; McKeown, D.B.; Halip, J. |
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Reviewing the causes of obsessive-compulsive disorders in horses |
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1991 |
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Vet. Med. |
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86 |
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527-530 |
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Cited By (since 1996): 17; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4526 |
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