| Records |
| Author |
Klingel, H. |
| Title |
Kalameili – future home of the Przewalski horse? |
Type |
Book Chapter |
| Year |
1990 |
Publication |
Proceedings of the 5th International Symposium on the Preservation of the Przewalski Horse, Leipzig |
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| Volume |
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Issue |
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Pages |
221-224 |
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Corporate Author  |
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Thesis |
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| Publisher |
Zoolog Garten |
Place of Publication |
Leipzig |
Editor |
Seifert, S. |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1323 |
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| Author |
Rau R.E., |
| Title |
Bring back the quagga |
Type |
Manuscript |
| Year |
1990 |
Publication |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
| Call Number |
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Serial |
1501 |
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| Author |
Rutberg, A. T. |
| Title |
Inter-group transfer in assateague pony mares |
Type |
Journal Article |
| Year |
1990 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
40 |
Issue |
5 |
Pages |
945-952 |
| Keywords |
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| Abstract |
Between-previous termgroup transfernext term of adult female previous termponies,next term Equus caballus, was investigated for three consecutive summers on previous Assateaguenext Island, Maryland, U.S.A. Both the previous terminternext term-band movements of individual previous termmares and the marenext term turnover rates of one-male “harem” bands were examined. Long-term previous termtransfersnext term occurred at rates ranging from 0·06 to 0·18 per previous termmarenext term per month. previous termMaresnext term with foals transferred more frequently than previous termmaresnext term without foals, but neither female age, pregnancy, nearest-neighbour distances nor dominance rank affected the likelihood of transferring. Band turnover rates were uncorrelated with the average frequency of previous termmare-marenext term aggression within the band, but new previous termmaresnext term entering a band suffered a transient rise in aggression received. Thus, female aggression did not encourage, and may have discouraged, previous terminternext term-band previous termtransfers.next term Older stallions and stallions who had held bands for 2 years or more had significantly larger and more stable bands. Fewer previous termmarenext term turnovers were seen in bands whose stallions tended to face their previous termmares,next term showed a relatively high proportion of time feeding, and showed a relatively low proportion of time involved in aggression with other stallions, although at marginal levels of significance for all three variables. Thus, variability in stallion attributes, and possibly behaviour, probably plays the strongest role in determining previous termmare transfernext term patterns at previous termAssateague.next term |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1535 |
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| Author |
Schilder, M.B. H. |
| Title |
Interventions in a herd of semi – captive Plains zebras |
Type |
Journal Article |
| Year |
1990 |
Publication |
Behavior |
Abbreviated Journal |
Behaviour |
| Volume |
112 |
Issue |
1-2 |
Pages |
53-83 |
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| Abstract |
n a herd of semi-captive plains zebras interventions, which occurred within the harems, were investigated in order to answer the question why zebras interfered. These interventions are of interest because they regulate the contacts between companions and because, as corrective and preventive measures, they reveal the normative principles underlying the behaviours by which animals structure their social environment. An attempt was made to deduce 1) the internal norms of the interferer; 2) his short term aims; 3) his tactis and 4) his perception of the social environment. The analysis revealed that in the case of an affiliative interaction foals, yearlings and adult mares started to interfere if a friend had an affiliative contact with another zebra. In view of the interferer's behaviours it was concluded that their aim was to break off the ongoing interaction and that zebras tended to protect friendship bonds. Foals and yearlings further interfered if their mother was being threatened, attacked or sexually approached by a stallion. In view of the interferer's behaviours its aim was to prevent iminent interactions or to break off ongoing interactions. This suggests that these interventions were of a protective nature. The interferer's behaviours in both contexts ware very much alike. Mares tended to interfere if their foal/yearling or adult daughter was threathened or aggressed or if a mare friend was being sexually approached by a stallion. This type of intervention was of a protective nature. Stallions in a multi male harem showed a high tendency to interfere in courtship interactions. From the resemblance between interventions in courtship and in aggressive interactions it is concluded that, at leat in a number of cases, the individuals have perceived courtship behaviour by the stallion as a threat towards the mare involved. |
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no |
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Serial |
1565 |
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| Author |
Schilder, M.B.H. |
| Title |
Social behaviour and social arganization of a herd of plains zebra in a safari park |
Type |
Manuscript |
| Year |
1990 |
Publication |
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Issue |
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Pages |
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Thesis |
Ph.D. thesis |
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Place of Publication |
University of Utrecht |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1566 |
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| Author |
Stander, P.E., Nott, T.B., Lindeque, P.M.; Lindeque, M. |
| Title |
Mass marking of zebras in the Etosha National Park, Namibia |
Type |
Journal Article |
| Year |
1990 |
Publication |
Madoqua |
Abbreviated Journal |
Madoqua |
| Volume |
17 |
Issue |
1 |
Pages |
47-49 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1627 |
| Permanent link to this record |
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| Author |
Franke Stevens, E. |
| Title |
Instability of harems of feral horses in relation to season and presence of subordinate stallions |
Type |
Journal Article |
| Year |
1990 |
Publication |
Behaviour |
Abbreviated Journal |
Behaviour |
| Volume |
112 |
Issue |
3-4 |
Pages |
149-161 |
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| Abstract |
Male horses (Equus caballus) defend harems of females (bands) year-round and throughout their lifetimes. A male's lifetime reproductive success depends upon the number of females in his harem. Although harems have previously been reported as remaining stable over many years, during the two years of this study 30 % of the adult females in an island population of feral horses changed harems during late winter. The seasonal differences in harem stability resulted from seasonal differences in the abundance and distribution of food. The spacing between band members was greater and the frequency of social interactions between them was lower in winter than in summer. In addition, the amount of time devoted to grazing increased in winter. These differences are attributed to the lower availability of suitable vegetation duirng winter. Harem stability did not depend on the age of females, the size of the harem, nor the age of the harem stallion, but did depend on the presence of subordinate stallions attached to the band. All of the females that changed bands left single-male bands; multi-male bands were stable throughout the study. |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1632 |
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| Author |
Wiesner, J.; V. Hegel, G. |
| Title |
Zur Immobilisation von Wildequiden mit STH 2130 und Tiletamin/Zolazepam |
Type |
Journal Article |
| Year |
1990 |
Publication |
Tierärtzliche Praxis |
Abbreviated Journal |
Tierärzl Prax |
| Volume |
18 |
Issue |
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Pages |
151-154 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1707 |
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| Author |
Würbel, H. |
| Title |
The relationship between social structure and mating system in donkeys & Mating strategies of male donkeys in a promiscuous mating system"l structure and mating system in donkeys & |
Type |
Manuscript |
| Year |
1990 |
Publication |
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Abbreviated Journal |
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Issue |
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Pages |
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Thesis |
Diploma thesis |
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Place of Publication |
Faculty of Natural Sciences, University of Berne, Switzerland |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
| Call Number |
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Serial |
1724 |
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| Author |
Wittling, W.; Pflüger, M. |
| Title |
Neuroendocrine hemisphere asymmetries: Salivary cortisol secretion during lateralized viewing of emotion-related and neutral films |
Type |
Journal Article |
| Year |
1990 |
Publication |
Brain and Cognition |
Abbreviated Journal |
Brain Cogn. |
| Volume |
14 |
Issue |
2 |
Pages |
243-265 |
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| Abstract |
The study set out to examine whether the cerebral hemispheres differ in their ability to regulate cortisol secretion during emotion-related situations. One hundred twenty-three adult subjects were shown either an emotionally aversive or a neutral film in the left or right hemisphere by means of a technique for lateralizing visual input that allows prolonged viewing while permitting free ocular scanning. The film-related changes of cortisol secretion were determined by salivary cortisol radioimmunoassay. Right hemispheric viewing of the emotionally aversive film resulted in a significantly higher increase of cortisol secretion than left hemispheric viewing of the same film. No such differences were observed with respect to the neutral film. Comparing the effects of the two films separately for each hemisphere revealed that only the right hemisphere was able to respond neuroendocrinologically in a different manner to the emotional and the neutral film. Therefore, it is concluded that cortical regulation of cortisol secretion in emotion-related situations is under primary control of the right hemisphere. The potential implications of asymmetric control of cortisol secretion with respect to the pathogenesis of psychosomatic and immunological disorders are discussed. |
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| ISSN |
0278-2626 |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5350 |
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