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Author |
Penzhorn Bl, |
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Title |
Equus zebra |
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Journal Article |
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Year |
1988 |
Publication |
Mammalian Species |
Abbreviated Journal |
Mammalian Species |
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Volume |
314 |
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1-7 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
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Call Number |
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Serial |
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) |
Type |
Journal Article |
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Year |
1988 |
Publication |
Journal of Reproduction and Fertility |
Abbreviated Journal |
J Reprod Fert |
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Volume |
83 |
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Pages |
371-375 |
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Keywords |
mountain zebra; testis size; spermatogenesis |
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Abstract |
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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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
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Call Number |
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Serial |
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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Journal Article |
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Year |
1988 |
Publication |
Oryx |
Abbreviated Journal |
Oryx |
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Volume |
22 |
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Pages |
154-157 |
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Keywords |
Equidae genetics. |
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Abstract |
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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Notes |
from Professor Hans Klingels Equine Reference List |
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yes |
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1537 |
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Author |
Smielowski, J. |
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Title |
Breeding of the Grevy's Zebra at Polish zoological gardens |
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Journal Article |
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Year |
1988 |
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Abbreviated Journal |
Przeglad Zool |
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Volume |
32 |
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Pages |
595-597 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
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Call Number |
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Serial |
1608 |
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Author |
Thackeray, J.F. |
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Title |
Zebras from wonderwerk cave, northern Cape province, South Africa: attempts to distinguish Equus burchelli and E. quagga |
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Journal Article |
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Year |
1988 |
Publication |
South African journal of science |
Abbreviated Journal |
Suid- Afrikaanse Tydsskrif vir Wetenskap |
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84 |
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Pages |
99-101 |
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Keywords |
Cape Province; Teeth; Statistical analysis; Equidae; Hippomorpha; South Africa; Southern Africa; Perissodactyla; Mammalia; Vertebrata |
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ISSN |
0038-2353 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
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Call Number |
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Serial |
1644 |
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Author |
Westlin-van Aarde, L.M.; van Aarde, R. J.; Skinner, J. D. |
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Title |
Reproduction in female Hartmann's zebra |
Type |
Journal Article |
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Year |
1988 |
Publication |
Journal of Reproduction and Fertility |
Abbreviated Journal |
J Reprod Fert |
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Volume |
84 |
Issue |
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Pages |
505-511 |
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Keywords |
zebra; reproduction; ovaries; seasonality; progesterone |
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Ovaries, fetuses and plasma were collected from zebra mares shot in the Etosha National Park in Namibia between 15 and 25 August 1983. Ovarian weight was affected by reproductive status and most of the non-pregnant mares were anoestrous. The number of follicles varied between individuals and only pro-oestrous/oestrous mares had follicles larger than 20 mm in diameter. The largest follicle in pregnant mares was only 9 mm in diameter. Corpora lutea and corpora albicantia were found in non-pregnant as well as pregnant mares: 4 pregnant mares had only corpora albicantia. The presence of secondary corpora lutea could not be confirmed in any of the pregnant mares. Implantation was estimated to occur at around 73 days of gestation, and most mares (84%) had conceived between November and April. Peripheral concentrations of plasma progesterone during pregnancy varied from 0·5 to 2·4 ng/ml. |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
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Call Number |
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Serial |
1705 |
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Author |
Berger, J, |
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Title |
Social systems, resources, and phylogenetic inertia: an experimental test and its limitations |
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Book Chapter |
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Year |
1988 |
Publication |
Ecology of Social Behavior |
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Pages |
157-186 |
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Publisher |
Academic Press |
Place of Publication |
San Diego |
Editor |
Slobochikoff, C.N. |
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Original Title |
Ecology of Social Behavior |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2234 |
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Author |
Byrne, Richard; Whiten, Andrew |
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Title |
Machiavellian Intelligence |
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Book Whole |
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Year |
1988 |
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Abstract |
This book presents an alternative to conventional ideas about the evolution of the human intellect. Instead of placing top priority on the role of tools, the pressure for their skillful use, and the related importance of interpersonal communication as a means for enhanced cooperation, this<BR>volume explores quite a different idea-- that the driving force in the evolution of human intellect was social expertise--a force which enabled the manipulation of others within the social group, who themselves are seen as posing the most challenging problems faced by primitive humans. The need to<BR>outwit one's clever colleagues then produces an evolutionary spiraling of “Machiavellian intelligence.” The book forms a complete and self-contained text on this fast-growing topic. It includes the origins of the basic premise and a wealth of exciting developments, described by an international<BR>team of authors from the fields of anthropology, psychology, and zoology. An evaluation of more traditional approaches is also undertaken, with a view to discovering to what extent Machiavellian intelligence represents a complementary concept or one that is truly an alternative. Readers and<BR>students will find this fascinating volume carries them to the frontiers of scientific work on the origin of human intellect. |
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Oxford Univ Press |
Place of Publication |
Oxford |
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0-19-852175-8 |
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Equine Behaviour @ team @ |
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4412 |
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Author |
Byrne, Richard; Whiten, Andrew |
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Title |
The machiavellian intelligence hypothesis:Editorial |
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Book Chapter |
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Year |
1988 |
Publication |
Machiavellian Intelligence |
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1-9 |
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Oxford Univ Press |
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Oxford |
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0-19-852175-8 |
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Equine Behaviour @ team @ |
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4430 |
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Author |
Hauser M.D |
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Title |
Invention and social transmission: new data from wild vervet monkeys |
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Book Chapter |
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Year |
1988 |
Publication |
Machiavellian Intelligence |
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327-343 |
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Oxford Univ Press |
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Oxford |
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0-19-852175-8 |
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Call Number |
Equine Behaviour @ team @ Byrne1988 |
Serial |
4794 |
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