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Author |
Walters, J.R.; Seyfarth, R.M. |
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Title |
Primate Societies |
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Miscellaneous |
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1987 |
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Equine Behaviour @ team @ |
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4858 |
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Author |
Brown, J.L. |
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Title |
Helping and Communal Breeding in Birds |
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Miscellaneous |
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1987 |
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Equine Behaviour @ team @ |
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4907 |
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Author |
Harrington, F.H. |
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Title |
Aggressive howling in wolves |
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1987 |
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Anim Behav |
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35 |
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Equine Behaviour @ team @ Harrington1987 |
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6457 |
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Author |
Deuel, N.R.; Lawrence, L.M. |
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Title |
Laterality in the gallop gait of horses |
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Journal Article |
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Year |
1987 |
Publication |
Journal of biomechanics |
Abbreviated Journal |
J Biomech |
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20 |
Issue |
6 |
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645-649 |
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Keywords |
Animals; *Functional Laterality; *Gait; Horses/*physiology; Kinesis |
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Abstract |
Bilateral asymmetry in gallop stride limb contact patterns of four Quarter Horse fillies was documented by high-speed cinematography. Horses were filmed with rider by two cameras simultaneously while galloping along a straightaway. Even though signaled for each gallop lead an equivalent number of times, horses frequently switched leads, selecting the left lead nearly twice as often as the right. Velocities and stride lengths were greater for the left lead than the right, but stride frequencies did not differ between leads. Velocity effects were partitioned out in limb contact data analysis to enable the determination of persistent gallop stride asymmetries. The contact duration for the trailing (right) fore limb on the left lead exceeded the contact duration for the trailing (left) fore limb on the right lead. Selecting the right fore limb as the trailing fore limb may have allowed horses to use it to withstand the greater stresses and caused them to preferentially gallop with the left fore limb leading. Laterality may have an important influence on equine gallop motion patterns and thereby influence athletic performance. |
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English |
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0021-9290 |
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PMID:3611140 |
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refbase @ user @ |
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528 |
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Author |
Ginsberg, J.R. |
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Title |
Social behavior and mating strategies of an arid adapted equid: the Grevy's zebra. |
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1987 |
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Prnceton |
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Equine Behaviour @ team @ |
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2295 |
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Author |
GODFREY D et al, |
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Title |
Zebra stripes and tiger stripes: the special frequency distribution of the pattern compared to that of the background is significant in disply and crysis |
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Journal Article |
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Year |
1987 |
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Biol J Linnean Soc |
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32 |
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427-433 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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1116 |
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Author |
Harley Eh, |
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Title |
The retrieval of the quagga |
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Journal Article |
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1987 |
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from Professor Hans Klingels Equine Reference List |
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1160 |
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Author |
Sherwin, C.M.; Johnson, K.G. |
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Title |
The influence of social factors on the use of shade by sheep |
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Journal Article |
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Year |
1987 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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18 |
Issue |
2 |
Pages |
143-155 |
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Abstract |
Individual differences in shading behaviour within a flock of sheep could be due to differences in thermoregulatory capabilities or to the influence of social factors. The possible influence of social factors on shade-use is examined in this paper. Two measures of dominance were made on 39 Merino wethers. These were based on the hierarchy determined by butting during feeding and on priority of access to limited feed. Leadership was also assessed while driving the sheep to a woolshed and as the sheep entered weighing scales. These behavioural traits were compared with leadership to shade and shade-use observed on 9 days during summer in a small pastureless enclosure containing natural shade. Maximum ambient temperature on these 9 days varied between 29.0 and 39.5[degree sign]C. All behavioural traits examined were significantly repeatable. The two dominance ranks were negatively correlated (P<0.05). The butting hierarchy was correlated with shading behaviour; those sheep that butted the larger proportion of the flock were seen to shade for longer periods of time (P=0.05). This relationship became more significant as environmental temperature increased. Significant (P<0.05) differences in the amount of time each sheep spent shading were evident throughout the flock, but in particular seven individuals shaded much less than others. Shade-use increased in hot weather and was slightly more strongly correlated with radiation load than with air temperature. The non-shading leadership ranks were related neither to each other nor to the leadership to shade. However, the sheep that moved to shade first remained there longest (P<0.05). Reduced motivation to feed did not appear to explain early movement to shade. Few overtly aggressive or other interactions between animals were seen to be associated with movements to or within shade. Nonetheless, the results indicate that social forces do exert some influence on shade-use. |
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Equine Behaviour @ team @ room B 3.029 |
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2037 |
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Author |
Kacelnik, A. |
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Title |
Information primacy or preference for familiar foraging techniques? A critique of Inglis & Ferguson |
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Journal Article |
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Year |
1987 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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35 |
Issue |
3 |
Pages |
925-926 |
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2121 |
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Author |
Berger, J.; Cunningham, C. |
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Title |
Influence of Familiarity on Frequency of Inbreeding in Wild Horses |
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1987 |
Publication |
Evolution |
Abbreviated Journal |
Evolution |
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41 |
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229-231 |
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Equine Behaviour @ team @ |
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2232 |
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