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Author |
Houpt Ka, H.T. |
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Title |
Social and illumination preferences of mares |
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Journal Article |
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Year |
1988 |
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Abbreviated Journal |
J Anim Sci |
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66 |
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2159-2164 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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1201 |
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Author |
Houpt, K.A.; Fraser, A.F. |
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Title |
Przewalski horses |
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Journal Article |
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Year |
1988 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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21 |
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1-2 |
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1-3 |
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Equine Behaviour @ team @ |
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2302 |
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Author |
Kirkpatrick, J. F.; Kasman, L. H.; Lasley,; B. L.; Turner, J. W. Jr. |
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Title |
Pregnancy Determination in Uncaptured Feral Horses |
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Journal Article |
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Year |
1988 |
Publication |
Journal of Wildlife Management |
Abbreviated Journal |
J Wildl Manag |
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52 |
Issue |
2 |
Pages |
305-308 |
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Abstract |
The urinary excretion of estrone sulfate ($\text{E}{1}\text{S}$) by 25 free-roaming feral horses (Equus caballus) was measured by radioimmunoassay applied to extracts of urine-soaked soil. Twelve of 15 mares having $\text{E}{1}\text{S}$ concentrations >1.0 mg/mg creatinine (x = 2.64 +- 1.02 [SD]) produced foals. All 10 mares with $\text{E}{1}\text{S}$ concentrations <1.0 mg/mg creatinine (x = 0.44 +- 0.26) did not foal. Extracting urine from soil and measuring $\text{E}{1}\text{S}$ and creatinine can be used to determine pregnancy in free-roaming feral horses without the stress of capture or immobilization. |
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Equine Behaviour @ team @ |
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2290 |
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KIRKPATRICK JF et al, |
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Pregnancy determination in uncaptured feral Horses based on steroid metabolites in urine – soaked snow and free steroids in feces |
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1988 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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1272 |
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Author |
Klimov, V.V. |
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Title |
Spatial-ethological organization of the herd of Przewalski horses (Equus przewalskii) in Askania-Nova |
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Journal Article |
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Year |
1988 |
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Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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21 |
Issue |
1-2 |
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99-115 |
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Abstract |
The ethological structure of the herd of Przewalski horses includes hierarchic ranks of horses which determine their social roles in the herd. Besides the age ranks, the wild horses are characterized by the formation of harem groups, a “leading” group of females, a group of bachelor stallions, family groups, etc. The ethological structure determines the spatial one, which is the form of distribution of horses over the territory, and its assimilation and transformation into a system of informative spatial units. Under the influence of “internal” and “external” stimuli, the intragoup regulatory mechanims (social adaptations) manifest themselves, which allow the herd to function in the complicated situation of the reserve and allow humans to control the herd by using these mechanisms. There are grounds to believe that, given the balanced ethological structure of these groups, wild horses could be successfully acclimatized into natural biotopes. |
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Equine Behaviour @ team @ |
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2330 |
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Author |
Kolter, L.; Zimmermann, W. |
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Title |
Social behaviour of Przewalski horses (Equus p. przewalskii) in the Cologne Zoo and its consequences for management and housing |
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Journal Article |
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Year |
1988 |
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Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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21 |
Issue |
1-2 |
Pages |
117-145 |
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Between 1977 and 1986, two actual rank changes and two unsuccessful attempts occurred among the mares of the Cologne herd. The stallion was at first a low-ranking individual, but attained a dominant position during the last 3 years. At this time he started to split his group and thus to affect attachment relationships among his mares. During his absence of half a year, new bonds resulted and disappeared again some months after his return. Foals were tolerated by the sire for a long time. His behaviour to young, sub-adult mares varied with the individual. Protection of sub-adult mares by adult mares against the stallion's attacks may occur. Young mares protect and guard strange foals from their very first day. Management steps to cope with social and feeding problems consisted of enlargement and adding complexity to the enclosure, the establishment of more feeding sites, building a stable and temporary removal of the stallion. |
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Equine Behaviour @ team @ |
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2332 |
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Author |
KOTERBA AM et al, |
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Title |
Brathing strategy of the adult horse at rest |
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Journal Article |
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Year |
1988 |
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J Appl Physiol |
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64 |
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337-346 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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1327 |
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Author |
Penzhorn Bl, |
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Title |
Equus zebra |
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Journal Article |
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1988 |
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Mammalian Species |
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Mammalian Species |
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314 |
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1-7 |
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from Professor Hans Klingels Equine Reference List |
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yes |
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1460 |
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Author |
Penzhorn, B. L.; van der Merwe, N. J. |
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Title |
Testis size and onset of spermatogenesis in Cape mountain zebras (Equus zebra zebra) |
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Journal Article |
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1988 |
Publication |
Journal of Reproduction and Fertility |
Abbreviated Journal |
J Reprod Fert |
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83 |
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371-375 |
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Keywords |
mountain zebra; testis size; spermatogenesis |
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Testis mass of adult Cape mountain zebra stallions (mean 70·0 g) was appreciably less than that of other zebra species and domestic horses. The histological appearance of the testes of 11-, 24- and 29-month-old colts was typically prepubertal. Spermatogenic activity of a 4-year-old stallion obtained at the end of summer was at a very low level, while a 4·5-year-old stallion obtained 6 weeks after the winter solstice showed a marked increase in spermatogenesis compared with the 4-year-old. Stallions 6·5-19 years of age collected in different seasons all showed active spermatogenesis. |
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from Professor Hans Klingels Equine Reference List |
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yes |
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Call Number |
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1463 |
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Author |
Ryder, O.A. |
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Title |
Przewalski's horse – putting the wild horse back in the wild |
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1988 |
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Oryx |
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Oryx |
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22 |
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154-157 |
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Equidae genetics. |
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The Asian wild horse, or Przewalski's horse (Equus przewalskii), is believed to currently survive only in captivity. There are more than 660 individuals in over 70 zoological collections, and animals are available for reintroduction. The Przewalski's horse had been bred in captivity for 12 generations, and inbreeding has occurred. Genetic variability has been lost, and released animals will require acclimatization on or near release sites. In China, a program is under way for acclimatization, breeding, and release of wild horses, and plans are being made for a similar program in Mongolia. (LCA) |
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from Professor Hans Klingels Equine Reference List |
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Call Number |
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1537 |
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