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Author |
Rossdale Pd, S.R. |
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Title |
The time of foaling of thoroughbred mares |
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1967 |
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J Reprod Fert |
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13 |
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342-343 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1521 |
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Author |
Klingel H, |
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Title |
Reproduction in the Plains Zebra, Equus burchelli boehmi: Behaviour and Ecological Factors |
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Journal Article |
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Year |
1969 |
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Abbreviated Journal |
J Reprod Fert Suppl |
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Volume |
6 |
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339-345 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1292 |
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Author |
Douglas Rh, G.O. |
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Title |
Development of the equine fetus and placenta |
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Journal Article |
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Year |
1975 |
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Abbreviated Journal |
J Reprod Fert (Suppl) |
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Volume |
23 |
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Pages |
495-498 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1023 |
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Author |
Klingel, H. |
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Title |
Social organization and reproduction in equids |
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Journal Article |
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Year |
1975 |
Publication |
Journal of Reproduction and Fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
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23 |
Pages |
7-11 |
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Keywords |
Animals; Behavior, Animal; Female; Male; Perissodactyla/*physiology; Reproduction; *Sexual Behavior, Animal; Social Behavior; Territoriality |
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Abstract |
There are two distinct types of social organization and, accordingly, two types of mating systems in equids. In the horse, Plains zebra and Mountain zebra, the adults live in non-territorial and cohesive one-male groups and in stallion groups. The family stallions have exclusive mating rights which are respected by all others. In Grevy's zebra and in the African and Asiatic wild asses, the stallions are permanently territorial and have exclusive mating rights within their territories. Ecological and evolutionary aspects are discussed. |
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0449-3087 |
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PMID:1060868 |
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Call Number |
Equine Behaviour @ team @ |
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2303 |
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Author |
Niekerk Van Ch, A.W. |
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Title |
Early embryonic development in the horse |
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Journal Article |
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Year |
1975 |
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Abbreviated Journal |
J Reprod Fert Suppl |
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Volume |
23 |
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495-498 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1417 |
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Author |
Pickett Bw, V.J. |
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Title |
Abnormalities of mating behaviour in domestic stallions |
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Journal Article |
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Year |
1975 |
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Abbreviated Journal |
J Reprod Fert Suppl |
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Volume |
23 |
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129-134 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1470 |
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Author |
Short Rv, |
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Title |
The evolution of the horse |
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Journal Article |
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Year |
1975 |
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Abbreviated Journal |
J Reprod Fert Suppl |
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Volume |
23 |
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1-6 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1589 |
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Author |
Feist, J.D.; McCullough, D.R. |
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Title |
Reproduction in feral horses |
Type |
Journal Article |
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Year |
1975 |
Publication |
Journal of Reproduction and Fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
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Volume |
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Issue |
23 |
Pages |
13-18 |
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Keywords |
Age Factors; Animals; Female; Horses/*physiology; Leadership; Male; Maternal Behavior; Population; Reproduction; *Sexual Behavior, Animal; Social Dominance; Sucking Behavior |
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Abstract |
A behavioural study of feral horses was conducted on the Pryor Mountain Wild Horse Range in the western United States. All 270 horses on the Range were identified individually. The sex ratio was nearly balanced. Foal to adult female ratio was 43-2:100. Morality was concentrated among foals and old horses. Horses were organized as forty-four harem groups each with a dominant stallion, one to two immature stallions, one to three immature mares, one to three adult mares and their yearling and foal offspring, and 23 bachelor groups of one to eight stallions. Harem groups were quite stable year-round because of dominance and leadership by the stallions and group fidelity by mares and their offsring. Most changes occurred during the breeding season and involved immature females. Defeat of dominant stallions was infrequent. Immature males were tolerated because of their submissive behaviour. Bachelor stallion groups were inherently unstable. Mares came into heat after foaling in May/June, and were mated by harem stallions only. |
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0449-3087 |
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Notes |
PMID:1060766 |
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Call Number |
refbase @ user @ |
Serial |
1964 |
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Author |
Belonje, P.C.; van Niekerk, C.H. |
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Title |
A review of the influence of nutrition upon the oestrous cycle and early pregnancy in the mare |
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Journal Article |
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Year |
1975 |
Publication |
Journal of Reproduction and Fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
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23 |
Pages |
167-169 |
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Keywords |
Animals; Body Weight; *Diet; *Estrus; Female; Fertility; Fetal Resorption/prevention & control; Horses/*physiology; Pregnancy |
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Attention is drawn to the beneficial effect of improved nutrition during winter and early spring on the ovarian activity of mares. Furthermore, the necessity of an adequate plane of nutrition during early pregnancy to prevent embryonic resorption is stressed. |
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0449-3087 |
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PMID:1060772 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2225 |
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Author |
Turner, J.W.J.; Kirkpatrick, J.F. |
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Title |
Androgens, behaviour and fertility control in feral stallions |
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Year |
1982 |
Publication |
Journal of reproduction and fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
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32 |
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79-87 |
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Keywords |
Animals; Animals, Wild; Copulation/drug effects; Female; *Fertility/drug effects; Horses/*physiology; Male; Periodicity; Pregnancy; Seasons; *Sexual Behavior, Animal/drug effects; Sexual Maturation; Sperm Count; Sperm Motility/drug effects; Testosterone/*blood/pharmacology |
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This field study of feral stallions in Montana and Idaho examines and correlates the seasonal pattern of plasma androgens and specific sociosexual behaviour and reports the effect of a long-acting androgenic steroid on this behaviour and on fertility. Plasma testosterone was measured by competitive protein binding assay in samples obtained by jugular venepuncture from captured animals. In samples taken from 34 sexually mature stallions in 6 different months during the year, a definite seasonal pattern in testosterone was present, with a peak in May (3.04 +/- 0.63 ng/ml) and a nadir in December (1.55 +/- 0.34 ng/ml). Values were less than 2.0 ng/ml in non-breeding months and greater than 2.4 ng/ml in breeding months. Behavioural endpoints measured were (1) stallion scent marking in response to elimination by mares (elimination marking), (2) mounting and (3) copulation. The frequencies of each of these endpoints followed closely the seasonal pattern seen for plasma androgens. In the fertility study microcapsulated testosterone propionate (microTP) was administered i.m. to 10 harem stud stallions 3 months before the 1980 breeding season. In these stallions and in 10 control harem studs, the above behavioural endpoints were examined in the 1980 and 1981 breeding seasons, and foal counts were made in 1981. There were no direct inhibitory or stimulatory effects of microTP treatment on any of the behavioural endpoints in either year. In 1981 foals were produced in 87.5% of the control bands and 28.4% of the microTP-treated bands. These results indicate that microencapsulated testosterone propionate can provide effective fertility control in feral horses without causing significant alterations in sociosexual behaviour. |
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0449-3087 |
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PMID:6962905 |
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Call Number |
refbase @ user @ |
Serial |
138 |
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