| Records |
Author  |
Zabel, C. J.; Glickman, S. E.; Frank, L. G.; Woodmansee, K. B.; Keppel, G. |
| Title |
Coalition formation in a colony of prepubertal spotted hyaenas |
Type |
Book Chapter |
| Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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| Volume |
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Issue |
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Pages |
113–135 |
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| Publisher |
Oxford University Press |
Place of Publication |
Oxford |
Editor |
Harcourt, A.H.; de Waal, F.B.M. |
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Equine Behaviour @ team @ |
Serial |
5232 |
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| Author |
Winkler A, |
| Title |
The feeding ecology of the Cape Mountain zebra in the Mountain Zebra National Park |
Type |
Manuscript |
| Year |
1992 |
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Thesis |
Doctoral thesis |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1713 |
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| Author |
Whiten, A.; Ham, R. |
| Title |
On the nature and evolution of imitation in the animal kingdom: reappraisal of a century of research. |
Type |
Journal Article |
| Year |
1992 |
Publication |
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Abbreviated Journal |
Adv. Study Behav. |
| Volume |
21 |
Issue |
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Pages |
239-283 |
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no |
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Equine Behaviour @ team @ |
Serial |
5599 |
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| Author |
Wall, D.L.; Topliff, D.R.; Freeman, D.W.; Wagner, D.G.; Breazile, J.W.; Stutz, W.A. |
| Title |
Effect of dietary cation-anion balance on urinary mineral excretion in exercised horses |
Type |
Journal Article |
| Year |
1992 |
Publication |
Journal of Equine Veterinary Science |
Abbreviated Journal |
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| Volume |
12 |
Issue |
3 |
Pages |
168-171 |
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| Abstract |
Summary Four mares and four geldings of Quarter Horse and Thoroughbred breeding were used in two simultaneous 4x4 Latin square experiments to study the effects of dietary cation-anion balance (DCAB), defined as meq ((Na+K)-C1)/kg dry matter, on urinary pH and mineral excretion in exercised horses. Diets consisted of a pelleted concentrate of corn, soybean meal and cottonseed hulls fed with bermudagrass hay. Treatments with DCAB of +5 (Low, L), +107 (Medium Low, ML), +201 (Medium High, MH) and +327 (High, H), meq ((Na+K)-Cl)/kg dry matter were formed by supplementing diet L with calcium chloride and ammonium chloride, diet ML with calcium chloride and diet H with sodium bicarbonate and potassium citrate (Table 1). Diet MH was not supplemented and served as the control treatment. Horses were conditioned aerobically for 6 weeks using long, slow, distance (LSD) workouts. During the experimental periods, horses were subjected to a combined exercise regimen alternating LSD with an interval-training protocol 6 days/week. There was a significant (P<.01) treatment effect on urine pH; least squares means for L, ML, MH and H were 6.73, 7.17, 7.38, and 7.92. Horses consuming diet L excreted more calcium in the urine (P<.05) than those consuming MH or H. Least squares means for daily urine calcium excretion tended to be linear across treatments and ranged from 19.66 g/day for diet L to 9.12 g/day for diet H. Urinary chloride excretion was higher (P<.05) for L than for MH or H. Horses fed diet H excreted more sodium (P<.05) in urine than horses fed the other diets. Lowering DCAB, increases urinary calcium loss; depending on the level of calcium intake, this could lead to negative calcium balance in exercising horses. |
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| ISSN |
0737-0806 |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4833 |
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| Author |
Urcuioli, P.J.; Zentall, T.R. |
| Title |
Transfer across delayed discriminations: evidence regarding the nature of prospective working memory |
Type |
Journal Article |
| Year |
1992 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
| Volume |
18 |
Issue |
2 |
Pages |
154-173 |
| Keywords |
Animals; *Appetitive Behavior; Attention; *Color Perception; Columbidae; *Discrimination Learning; *Mental Recall; *Pattern Recognition, Visual; Problem Solving; Retention (Psychology); *Transfer (Psychology) |
| Abstract |
Pigeons were trained successively either on 2 delayed simple discriminations or on a delayed simple discrimination followed by delayed matching-to-sample. During subsequent transfer tests, the initial stimuli from the 1st task were substituted for those in the 2nd. Performances transferred immediately if both sets of initial stimuli had been associated with the presence versus absence of food on their respective retention tests, and the direction of transfer (positive or negative) depended on whether the substitution involved stimuli with identical or different outcome associates. No transfer was found, however, when the initial stimuli were associated with different patterns of responding but food occurred at the end of every trial. These results are consistent with outcome expectancy mediation but are incompatible with response intention and retrospective coding accounts. |
| Address |
Department of Psychological Sciences, Purdue University, West Lafayette, Indiana 47907-1364 |
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English |
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0097-7403 |
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| Notes |
PMID:1583445 |
Approved |
no |
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refbase @ user @ |
Serial |
260 |
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| Author |
Timney, B.; Keil, K. |
| Title |
Visual acuity in the horse |
Type |
Journal Article |
| Year |
1992 |
Publication |
Vision Research |
Abbreviated Journal |
Vis. Res. |
| Volume |
32 |
Issue |
12 |
Pages |
2289-2293 |
| Keywords |
Horse Visual acuity Visual discrimination |
| Abstract |
We assessed the ease with which horses could learn visual discriminations and measured their resolution acuity. We trained three horses to press their noses against one of two large wooden panels to receive a small food reward. Following training on a series of two-choice discrimination tasks, resolution acuity was measured. Although there was some variability between animals, the best acuity obtained was 23.3 c deg-1. Within the margin of error imposed by limited anatomical data, the obtained values are consistent with predictions based on retinal ganglion cell density estimates and posterior nodal distance/axial length ratios. They suggest that the resolution acuity of the horse is limited by ganglion cell density in the temporal portion of the narrow visual streak. |
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no |
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refbase @ user @ |
Serial |
851 |
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| Author |
Stutz, W.A.; Topliff, D.R.; Freeman, D.W.; Tucker, W.B.; Breazile, J.W.; Wall, D.L. |
| Title |
Effects of dietary cation-anion balance on blood parameters in exercising horses |
Type |
Journal Article |
| Year |
1992 |
Publication |
Journal of Equine Veterinary Science |
Abbreviated Journal |
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| Volume |
12 |
Issue |
3 |
Pages |
164-167 |
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| Abstract |
Summary Four geldings and four mares of primarily Thoroughbred and Quarter Horse breeding were used in simultaneous 4x4 Latin square experiments to test the effects of dietary cation-anion balance (DCAB), defined as meq ((Na+K)-C1)/kg diet dry matter, on blood pH, blood gases, acid-base status and plasma glucose in horses at rest and following anaerobic exercise. Four diets, consisting of a base concentrate of corn, soybean meal and cottonseed hulls fed in a 60:40 ratio with Bermudagrass hay, were formulated to provide a DCAB of 5 (L=Low), 107 (ML=Medium Low), 201 (MH=Medium High) and 327 (H=High) meq ((Na+K)-C1)/kg diet dry matter. Calcium chloride and ammonium chloride were added to treatment L and ML and sodium bicarbonate and potassium citrate were added to treatment H to achieve the desired cation-anion balance. Treatment MH was not supplemented and served as the control treatment. Prior to the experiment, horses performed six weeks of long, slow, distance (LSD) work. During the experimental periods, horses were subjected to an exercise regimen alternating LSD with an interval training protocol 6 days/week. Venous blood pH, pCO2 and bicarbonate levels were significantly lower in horses at rest consuming diet L versus diets MH and H. Blood pH and acid-base parameters decreased with decreasing DCAB. There were no significant differences in blood pH or acid-base parameters between treatments, after anaerobic exercise. Plasma glucose concentrations for treatment L were significantly lower than treatment H at 10, 20, and 30 minutes post-exercise. These data suggest that DCAB has significant effect on acid-base status and indicate that horses consuming diets with low DCAB may experience a metabolic acidosis. |
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| ISSN |
0737-0806 |
ISBN |
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| Notes |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4834 |
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| Author |
Steinhoff, H.J.; Schrader, J.; Schlitter, J. |
| Title |
Temperature-jump studies and polarized absorption spectroscopy of methemoglobin-thiocyanate single crystals |
Type |
Journal Article |
| Year |
1992 |
Publication |
Biochimica et Biophysica Acta |
Abbreviated Journal |
Biochim Biophys Acta |
| Volume |
1121 |
Issue |
3 |
Pages |
269-278 |
| Keywords |
Animals; Crystallization; Horses; Kinetics; Methemoglobin/*chemistry; Solutions; Spectrum Analysis; Temperature; Thiocyanates/*chemistry |
| Abstract |
Association equilibria and association kinetics of the thiocyanate binding reaction to methemoglobin in single crystals and solution are studied using temperature-jump technique and polarized absorption spectroscopy. Different kinetic constants are found for the reaction in solution and crystal phase for the alpha- and beta-subunits of the methemoglobin tetramer. The reduction of the reactivity of the alpha- and beta-subunits in crystalline phase is 6-fold and 2.4-fold, respectively, compared to the values found in solution. The intramolecular binding reaction of the N epsilon of the distal histidine E7 which is observed in methemoglobin in solution cannot be detected in single crystals. Our results suggest that crystallization of hemoglobin has little influence on small-scale structural fluctuations which are necessary for ligands to get to the binding sites and large-scale structural motions are suppressed. |
| Address |
Institut fur Biophysik, Ruhr-Universitat Bochum, Germany |
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English |
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0006-3002 |
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| Notes |
PMID:1627604 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
3800 |
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| Author |
Smith-Funk, E.D.; Crowell-Davis, S.L. |
| Title |
Maternal behavior of draft mares (Equus caballus) with mule foals (Equus asinus x Equus caballus) |
Type |
Journal Article |
| Year |
1992 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
33 |
Issue |
2-3 |
Pages |
93-119 |
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| Abstract |
Draft mares and their mule foals were observed from the day of birth to Week 17 of each foal's life. The rate of nursing was recorded and the duration of nursing activity to the nearest second. The rate at which foals engaged in nursing activity varied at each age. The duration of nursing bouts varied slightly as the foals matured. Aggression was recorded during both nursing and non-nursing activity for both the mares and foals. Maternal aggression was highest during nursing activity, especially during the pre-nurse nuzzling period. Maternal aggression increased as the foals matured. Mother-directed foal aggression was primarily in response to maternal aggression. Spatial relationships between each focal dyad were recorded when the foals were upright, not nursing and when they were recumbent. Spatial relationships differed based on the foal's state. The activity in which the mare engaged while her foal was recumbent was recorded. The movements of the mares were also recorded during foal recumbency. Mares approached or maintained their distance from their recumbent foal more than they left their recumbent foal in all weeks of the study, except Week 2. |
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Equine Behaviour @ team @ |
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2272 |
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| Author |
Silk, J. B. |
| Title |
Patterns of intervention in agonistic contests among male bonnet macaques |
Type |
Book Chapter |
| Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
215-232 |
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| Publisher |
Oxford University Press |
Place of Publication |
Oxford |
Editor |
Harcourt, A.H., and de Waal, F.B.M. |
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Equine Behaviour @ team @ |
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5234 |
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