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Author |
Schiffman, S.S. |
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Title |
Livestock odors: implications for human health and well-being |
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Journal Article |
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1998 |
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Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
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76 |
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5 |
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1343-1355 |
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Equine Behaviour @ team @ |
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2949 |
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Author |
Heird, J.C.; Lennon, A.M.; Bell, R.W. |
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Title |
Effects of early experience on the learning ability of yearling horses |
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Journal Article |
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Year |
1981 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
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Volume |
53 |
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5 |
Pages |
1204-1209 |
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Animals; Conditioning (Psychology); Female; *Handling (Psychology); Horses/*physiology; *Learning |
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Twenty-four yearling Quarter Horse fillies were divided into three groups (I) very limited handling, (II) intermediate handling and (III) extensive handling. At about 14 months of age, each horse was preconditioned for 2 weeks and then run in a simple place-learning T-maze test in which it had to locate its feed. Thirty trials were run daily for 20 days, with the location of the feed changed each day. To retire from the maze, a horse had to meet the criterion: 11 correct responses in 12 tries, with the last eight being consecutive. Horses in Group II required the fewest trials to reach criterion. These horses also learned more and had the highest percentage of correct responses (P less than .05). Mean trainability tended to predict learning ability; however, trainability and trials to criterion were not significantly correlated. Mean emotionality scores indicated a tendency for horses in the intermediately handled group to be less emotional than those in Group I or III. Results indicated that horses with an intermediate amount of handling scored higher on an intermediate test of learning. All handled horses scored higher on learning tests than those not handled. |
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0021-8812 |
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PMID:7319966 |
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Equine Behaviour @ team @ |
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3577 |
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Author |
Peham, C.; Licka, T.; Schobesberger, H.; Meschan, E. |
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Title |
Influence of the rider on the variability of the equine gait |
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Journal Article |
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Year |
2004 |
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Human Movement Science |
Abbreviated Journal |
European Workshop on Movement Science |
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23 |
Issue |
5 |
Pages |
663-671 |
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The aim of this study was to show that the motion pattern of a well-ridden horse varies less than the motion pattern of an unridden horse. In order to do so, we recorded the motion of two markers, one attached to the dorsal spinous processus of lumbar vertebra L4, the other to the right fore hoof. In total, we measured 21 horses in trot, ridden and unridden, with a fitting and with a non-fitting saddle. After breaking down the entire time series of the three-dimensional motion of the markers into their respective motion cycles, we computed a measure of motion pattern variability for the motion as well as for the derivatives (velocity and acceleration) along each of the three principal dimensions. Two of six variables (velocity and acceleration in the forward direction) displayed a significant discrimination between the ridden and the unridden case, and demonstrated the beneficial effect of a rider on the horse's motion pattern variability. Saddle fit was shown to have also an influence on motion variability: variability of two variables (velocity and of acceleration in forward direction) was significantly lower with a fitting saddle compared to a non-fitting saddle, a third variable (acceleration in the transversal direction) showed a significant difference also. This new method offers an objective evaluation of saddle fit, and a sensitive assessment of the quality of the rider in the moving horse. |
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Equine Behaviour @ team @ |
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3670 |
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Author |
Uzawa, T.; Akiyama, S.; Kimura, T.; Takahashi, S.; Ishimori, K.; Morishima, I.; Fujisawa, T. |
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Title |
Collapse and search dynamics of apomyoglobin folding revealed by submillisecond observations of alpha-helical content and compactness |
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Journal Article |
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Year |
2004 |
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Proceedings of the National Academy of Sciences of the United States of America |
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Proc. Natl. Acad. Sci. U.S.A. |
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101 |
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5 |
Pages |
1171-1176 |
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Animals; Apoproteins/*chemistry; Circular Dichroism; Cytochromes c/chemistry; Horses; Myoglobin/*chemistry; *Protein Folding; *Protein Structure, Secondary; Scattering, Radiation |
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Abstract |
The characterization of protein folding dynamics in terms of secondary and tertiary structures is important in elucidating the features of intraprotein interactions that lead to specific folded structures. Apomyoglobin (apoMb), possessing seven helices termed A-E, G, and H in the native state, has a folding intermediate composed of the A, G, and H helices, whose formation in the submillisecond time domain has not been clearly characterized. In this study, we used a rapid-mixing device combined with circular dichroism and small-angle x-ray scattering to observe the submillisecond folding dynamics of apoMb in terms of helical content (f(H)) and radius of gyration (R(g)), respectively. The folding of apoMb from the acid-unfolded state at pH 2.2 was initiated by a pH jump to 6.0. A significant collapse, corresponding to approximately 50% of the overall change in R(g) from the unfolded to native conformation, was observed within 300 micros after the pH jump. The collapsed intermediate has a f(H) of 33% and a globular shape that involves >80% of all its atoms. Subsequently, a stepwise helix formation was detected, which was interpreted to be associated with a conformational search for the correct tertiary contacts. The characterized folding dynamics of apoMb indicates the importance of the initial collapse event, which is suggested to facilitate the subsequent conformational search and the helix formation leading to the native structure. |
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Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo, Kyoto 615-8510, Japan |
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0027-8424 |
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PMID:14711991 |
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Equine Behaviour @ team @ |
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3779 |
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Author |
Bruns, E. |
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Title |
Estimation of the breeding value of stallions from the tournament performance of their offspring |
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Journal Article |
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Year |
1981 |
Publication |
Livestock Production Science |
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8 |
Issue |
5 |
Pages |
465-473 |
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Data from horse-riding competitions recorded in Germany in 1976 and 1977 have been analysed to estimate genetic parameters for performance traits of riding horses measured in dressage, jumping competitions and trials. The performance traits analysed were logarithmic earnings per start, relative place number, and place value. The results are the following. 1. (1) Heritability and repeatability estimates for performance in dressage shows are 0.2 and 0.4 respectively. Corresponding estimates for performance in jumping competitions are 20% less. No genetic differences are found between stallions for performance in trials.2. (2) A selection index for estimating the breeding value of stallions was constructed by using the repeated performances of their offspring in dressage and jumping shows. For this purpose, performance data for at least ten progeny should be available. The correlation between the breeding values estimated from the dressage and jumping performances of the same stallions was approximately zero.3. (3) Reliable progeny-testing requires that the assumptions of mating stallions at random, selecting progeny randomly, and distributing them equally across environmental effects be fulfilled.4. (4) The genetic use of breeding values of stallions estimated from the performance of their progeny is opposed by the prolongation of the generation interval. This can be partly overcome by sampling young stallions and making use of the test results for young progeny only. |
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refbase @ user @ |
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3968 |
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Author |
Verrill, S.; McDonnell, S. |
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Title |
Equal Outcomes with and without Human-to-Horse Eye Contact When Catching Horses and Ponies in an Open Pasture |
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Journal Article |
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Year |
2008 |
Publication |
Journal of Equine Veterinary Science |
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Volume |
28 |
Issue |
5 |
Pages |
309-312 |
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Horse handling; Horse management; Eye contact; Interspecies interactions; Equine behavior |
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Each of 104 horses and ponies was approached for catching at pasture by the same human handler in a standard manner, either maintaining human-to-animal eye contact (EC+; n = 51) or avoiding eye contact (EC-; n = 53). A subset of 74 of these subjects were reevaluated 3 weeks later under similar standard conditions except with the eye contact condition opposite to that used in the first round. Nonparametric statistical methods were used to evaluate between subjects (round 1, n = 104) and within subjects (rounds 1 and 2, n = 74) comparisons of successful or unsuccessful catching outcome with EC+ and EC-. Catching outcomes were similar with eye contact condition. Although this study represents a single handler at one study site, results suggest that human-to-horse eye contact may not be an important influence on catching pastured horses. Certainly, further work is needed to better understand the role of eye contact in horse handling. |
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0737-0806 |
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Equine Behaviour @ team @ |
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4711 |
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Author |
de Waal, F.B.M.; Ferrari, P.F. |
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Title |
Towards a bottom-up perspective on animal and human cognition |
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Journal Article |
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2010 |
Publication |
Trends in Cognitive Sciences |
Abbreviated Journal |
Trends Cognit. Sci. |
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14 |
Issue |
5 |
Pages |
201-207 |
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Over the last few decades, comparative cognitive research has focused on the pinnacles of mental evolution, asking all-or-nothing questions such as which animals (if any) possess a theory of mind, culture, linguistic abilities, future planning, and so on. Research programs adopting this top-down perspective have often pitted one taxon against another, resulting in sharp dividing lines. Insight into the underlying mechanisms has lagged behind. A dramatic change in focus now seems to be under way, however, with increased appreciation that the basic building blocks of cognition might be shared across a wide range of species. We argue that this bottom-up perspective, which focuses on the constituent capacities underlying larger cognitive phenomena, is more in line with both neuroscience and evolutionary biology. |
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1364-6613 |
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Equine Behaviour @ team @ |
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5857 |
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Author |
Burden, F.; Thiemann, A. |
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Title |
Donkeys Are Different |
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Journal Article |
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2015 |
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Journal of Equine Veterinary Science |
Abbreviated Journal |
Proceedings of the 2015 Equine Science Society Symposium |
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35 |
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5 |
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376-382 |
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Donkey; Ass; Equid; Mule |
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As a unique species of equine, the donkey has certain specific variations from the horse. This review highlights the origins of the donkey and how this impacts on its behavior, physiology, and propensity to disease. The donkey is less of a flight animal and has been used by humans for pack and draught work, in areas where their ability to survive poorer diets, and transboundary disease while masking overt signs of pain and distress has made them indispensable to human livelihoods. When living as a companion animal, however, the donkey easily accumulates adipose tissue, and this may create a metabolically compromised individual prone to diseases of excess such as laminitis and hyperlipemia. They show anatomic variations from the horse especially in the hoof, upper airway, and their conformation. Variations in physiology lead to differences in the metabolism and distribution of many drugs. With over 44 million donkeys worldwide, it is important that veterinarians have the ability to understand and treat this equid effectively. |
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0737-0806 |
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Equine Behaviour @ team @ |
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6541 |
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Author |
Galdikas, B.M. |
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Orangutan tool use |
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1989 |
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Science (New York, N.Y.) |
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Science |
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243 |
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4888 |
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152 |
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Animals; Animals, Wild; *Behavior, Animal; Cognition; *Hominidae; Humans; *Pongo pygmaeus |
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0036-8075 |
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PMID:2911726 |
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Equine Behaviour @ team @ |
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2847 |
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Hamilton, C.R.; Vermeire, B.A. |
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Complementary hemispheric specialization in monkeys |
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1988 |
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Science |
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Science |
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242 |
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4886 |
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1691-1694 |
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Twenty-five split-brain monkeys were taught to discriminate two types of visual stimuli that engage lateralized cerebral processing in human subjects. Differential lateralization for the two kinds of discriminations was found; the left hemisphere was better at distinguishing between tilted lines and the right hemisphere was better at discriminating faces. These results indicate that lateralization of cognitive processing appeared in primates independently of language or handedness. In addition, cerebral lateralization in monkeys may provide an appropriate model for studying the biological basis of hemispheric specialization. |
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Equine Behaviour @ team @ |
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5342 |
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