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MacFadden, B.J.; Solounias, N.; Cerling, T.E. |
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Title |
Ancient diets, ecology, and extinction of 5-million-year-Old horses from florida |
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Year |
1999 |
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Science |
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283 |
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5403 |
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824-827 |
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Six sympatric species of 5-million-year-old (late Hemphillian) horses from Florida existed during a time of major global change and extinction in terrestrial ecosystems. Traditionally, these horses were interpreted to have fed on abrasive grasses because of their high-crowned teeth. However, carbon isotopic and tooth microwear data indicate that these horses were not all C4 grazers but also included mixed feeders and C3 browsers. The late Hemphillian Florida sister species of the modern genus Equus was principally a browser, unlike the grazing diet of modern equids. Late Hemphillian horse extinctions in Florida involved two grazing and one browsing species. |
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Florida Museum of Natural History, University of Florida, Gainesville, FL 32611, USA. Department of Anatomy, New York College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, NY 11568, USA. Department of Geology |
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English |
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1095-9203 |
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PMID:9933161 |
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Equine Behaviour @ team @ |
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2652 |
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BERNITSCHKE K et al, |
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Title |
Chromosome complement: differences between Equus caballus and Equus przewalskii, Poliakoff |
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1965 |
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Science |
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148 |
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382 |
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from Professor Hans Klingels Equine Reference List |
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943 |
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Berger J, |
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Title |
Ecology and catastrophic mortality in wild horses: Implantations for interpreting fossil assemblages |
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1983 |
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Science 220 |
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1403-1404 |
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from Professor Hans Klingels Equine Reference List |
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937 |
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Hildebrand M, |
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Title |
Symmetrial gaits of horses |
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1965 |
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Science |
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150 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1185 |
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Lowenstein Jm, |
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Title |
The cry of the quagga |
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Journal Article |
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1985 |
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Counterpoints in Science |
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40-42 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1352 |
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Author |
A. Wiggins; K. Crowston |
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Title |
From Conservation to Crowdsourcing: A Typology of Citizen Science |
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Conference Article |
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2011 |
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2011 44th Hawaii International Conference on System Sciences |
Abbreviated Journal |
2011 44th Hawaii International Conference on System Sciences |
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1-10 |
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Keywords |
groupware; natural sciences computing; research and development; social sciences; crowdsourcing; citizen science typology; research collaboration; scientific research projects; virtual collaboration; Communities; Education; Monitoring; Collaboration; Organizations; Biological system modeling; Production |
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Abstract |
Citizen science is a form of research collaboration involving members of the public in scientific research projects to address real-world problems. Often organized as a virtual collaboration, these projects are a type of open movement, with collective goals addressed through open participation in research tasks. Existing typologies of citizen science projects focus primarily on the structure of participation, paying little attention to the organizational and macrostructural properties that are important to designing and managing effective projects and technologies. By examining a variety of project characteristics, we identified five types-Action, Conservation, Investigation, Virtual, and Education- that differ in primary project goals and the importance of physical environment to participation. |
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2011 44th Hawaii International Conference on System Sciences |
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ISSN |
1530-1605 |
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Equine Behaviour @ team @ |
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6430 |
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Author |
Sato, S.; Sako, S.; Maeda, A. |
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Title |
Social licking patterns in cattle (<em>Bos taurus</em>): influence of environmental and social factors |
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Journal Article |
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Year |
1991 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Applied Animal Behaviour Science |
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32 |
Issue |
1 |
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3-12 |
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To investigate the functions of social licking in cattle, four calves (one heifer and one steer in each of two herds), known to exhibit frequent social licking were observed continuously for 2 h before sunset for 13 days, using the focal animal sampling method. Calves were observed under various environmental conditions. Social licking significantly decreased on rainy days and tended to increase in a dirty barn and when food was restricted. Solicitation for social licking occurred not only from dominant animals of pairs but also from subordinates. Of the licking interactions, 31% occurred following solicitation, and these accounted for 39% of the total time spent licking. Following solicitation, 78% of social licking was oriented to the head and the neck regions that were inaccessible to self-licking animals. Unsolicited licking, however, was oriented not only to the head and the neck but also to the back and the rump regions, and these two latter regions were the major ones to receive licking. The effect of social relationships on social licking was investigated using least-squares analysis of variance. Social factors investigated were the difference of dominance values, the dominance-subordinance relationship, and kinship and familiarity; the sex of calves involved was also considered. Only familiarity had a significant effect on licking; exchanges of social licking increased with length of cohabitation. We suggest that social licking may have a cleaning effect, a tension-reducing effect and a bonding effect. |
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Elsevier |
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0168-1591 |
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doi: 10.1016/S0168-1591(05)80158-3 |
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Equine Behaviour @ team @ |
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6409 |
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Author |
Singh,M.; Singh,M.; Sharma, A. K.; Krishna B. A. |
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Title |
Methodological considerations in measurement of dominance in primates |
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Journal Article |
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2003 |
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CURRENT SCIENCE |
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CURRENT SCIENCE |
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84 |
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5 |
Pages |
709-713 |
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Abstract |
The strength of dominance hierarchy in a group of
animals needs to be quantitatively measured since it
influences many other aspects of social interactions.
This article discusses three attempts made by previous
researchers to measure the strength of hierarchy. We
propose a method which attempts to rectify the lacunae
in the previous attempts. Data are used from a
group of Japanese macaques housed in a colony. A
method to calculate strength of hierarchy has been
illustrated and a procedure has been suggested to
normalize the dominance scores in order to place the
ranks of individuals on an interval scale. |
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Biopsychology Laboratory, Department of Psychology, University of Mysore, Mysore 570 006, India |
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Equine Behaviour @ team @ |
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2860 |
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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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2004 |
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Human Movement Science |
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European Workshop on Movement Science |
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23 |
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5 |
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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 |
Vlajkoviç, S.; Nikoliç, V.; Nikoliç, A.; Milanoviç, S.žA.; Jankoviç, B.D. |
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Title |
Asymmetrical Modulation of Immune Reactivity in Left- and Right-Biased Rats After Ipsilateral Ablation of the Prefrontal, Parietal and Occipital Brain Neocortex |
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Journal Article |
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Year |
1994 |
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Int J Neurosci |
Abbreviated Journal |
International Journal of Neuroscience |
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78 |
Issue |
1-2 |
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123-134 |
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Brain asymmetry, brain neocortex, cortical ablation, rotational behavior, rotational bias, immune responses, neuroimmunomodulation, neuroimmunology |
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We report here on the lateralized brain immunomodulation in male Wistar rats, a phenomenon related to the rotational bias of animal and the site of cortical lesion. Rats assigned to left- and right-rotators in a cylindrical Plexiglass rotometer were subjected to the ablation of the ipsilateral prefrontal cortex (PFC), parietal cortex (PC) and occipital cortex (OC) and sensitized with bovine serum albumin (BSA) in complete Freund's adjuvant. Intact and sham-lesioned left-biased animals demonstrated increased Arthus and delayed hypersensitivity skin reactions and antibody production to BSA in comparison with corresponding right-biased animals. PFC ablation decreased humoral and cellular immune responses to BSA in left- but increased in right-biased rats. Lesioning of PC decreased humoral immune reactions in left- but increased in right-rotating animals. OC ablation failed to produce immunological abnormalities, These results suggest that immunopotentiation is associated with the left neocortex, and immunosuppression with the right neocortex. The prefrontal cortex appears to be particularly associated with immune reactions. |
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Informa Clin Med |
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0020-7454 |
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doi: 10.3109/00207459408986051 |
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Equine Behaviour @ team @ |
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5777 |
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