| Records |
| Author |
Luescher, U.A.; McKeown, D.B.; Halip, J. |
| Title |
Reviewing the causes of obsessive-compulsive disorders in horses |
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Journal Article |
| Year |
1991 |
Publication |
Vet. Med. |
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| Volume |
86 |
Issue |
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Pages |
527-530 |
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Cited By (since 1996): 17; Export Date: 21 October 2008 |
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| Call Number |
Equine Behaviour @ team @ |
Serial |
4526 |
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| Author |
Mills, G. |
| Title |
Kalahari Hyenas |
Type |
Miscellaneous |
| Year |
1991 |
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Equine Behaviour @ team @ |
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4884 |
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| Author |
Schwarzenberger, F.; Mostl, E.; Bamberg, E.; Pammer, J.; Schmehlik, O. |
| Title |
Concentrations of progestagens and oestrogens in the faeces of pregnant Lipizzan, trotter and thoroughbred mares |
Type |
Journal Article |
| Year |
1991 |
Publication |
Journal of reproduction and fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
| Volume |
44 |
Issue |
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Pages |
489-499 |
| Keywords |
Animals; Estrogens/*analysis; Feces/*chemistry; Female; Gestational Age; Horses/*metabolism; Immunoenzyme Techniques; Labor, Obstetric; Pregnancy; Pregnancy, Animal/*metabolism; Pregnenes/analysis; Progestins/*analysis |
| Abstract |
Faecal samples were collected at weekly intervals from pregnant Lipizzan mares during Weeks 7-16 following mating and from Lipizzan, Trotter and Thoroughbred mares during the last 3 months of gestation. After parturition, samples were taken daily from the Thoroughbred mares for another 6 days. Non-pregnant mares served as controls. The concentrations of unconjugated oestrogens (Eg), 20 alpha-OH-progestagens (20 alpha-G) and 20 beta-OH-progestagens (20 beta-G) were measured by enzyme immunoassay. In the faeces of Lipizzan mares, immunoreactive progestagens were significantly (P less than 0.01) elevated above the levels in non-pregnant mares by Week 11, and Eg by Week 13 of pregnancy onwards. During the last 3 months of gestation, concentrations of Eg were significantly higher in Trotter mares than in Lipizzan and Thoroughbred mares. Concentrations of 20 alpha-G and 20 beta-G increased to maximal values in the last month of gestation. There was no significant difference among the 3 breeds with respect to 20 alpha-G but, during the 10 weeks before parturition, concentrations of 20 beta-G in the Lipizzan mares were significantly lower (P less than 0.05) than those in the Thoroughbred mares. They were also significantly lower than those of the Trotter mares during the last 4 weeks of gestation. After parturition, the concentrations of Eg and progestagens had declined to baseline values by Days 3 and 4 respectively. From these results we conclude that high concentrations of progestagens with 20 alpha- and 20 beta-hydroxyl groups are present in the faeces of pregnant mares, especially during the last month of gestation. |
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Institut fur Biochemie, Veterinary Medical University, Vienna, Austria |
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English |
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0449-3087 |
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PMID:1795293 |
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refbase @ user @ |
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322 |
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| Author |
Houpt, K.A. |
| Title |
Investigating equine ingestive, maternal, and sexual behavior in the field and in the laboratory |
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Journal Article |
| Year |
1991 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
| Volume |
69 |
Issue |
10 |
Pages |
4161-4166 |
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| Abstract |
Some of the techniques that may be used to study social, reproductive, and ingestive behavior in horses are described in this paper. One of the aspects of equine social behavior is the dominance hierarchy or patterns of agonistic behavior. Paired or group feeding from a single food source may be used to determine dominance hierarchies quickly. Focal animal studies of undisturbed groups of horses may also be used; this method takes longer, but may reveal affiliative as well as agonistic relationships among the horses. Reproductive behavior includes flehmen, the functional significance of which can be determined using combinations of field observations of harem groups and laboratory studies of stallions exposed to female urine or feces in the absence of the donor mare. Ingestive behavior may include food, salt, or water intake. Direct and indirect measurements of intake can be made and used to answer questions regarding the ability of horses to control their energy intake when the diet is diluted, the effect of feral equids on the ecology of an area, and the abilities of horses to compensate for dehydration and hypovolemia. |
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refbase @ user @ |
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667 |
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| Author |
Deutsch, J.; Lee, P. |
| Title |
Dominance and feeding competition in captive rhesus monkeys |
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Journal Article |
| Year |
1991 |
Publication |
International Journal of Primatology |
Abbreviated Journal |
Int. J. Primatol. |
| Volume |
12 |
Issue |
6 |
Pages |
615-628 |
| Keywords |
female dominance – feeding competition – nutrition – stress |
| Abstract |
The feeding behavior of 16 adult female rhesus monkeys living in three captive social groups was observed. Estimates of relative food intake, feeding rate, and location of feeding in relation to food sources were compared between females of different dominance ranks. Higher-ranking females had greater access to feeding sites and were supplanted or threatened less frequently while feeding than subordinates. However, no consistent differences in estimates of total intake were found between females of high and females of low rank. The effects of dominance on feeding behavior were most pronounced in the group receiving the least food relative to estimates of overall group nutritional requirements. Higher-ranking females, both over the long term and during the study period, tended to produce more surviving offspring. The effects of dominance on reproductive performance appeared to be less related to food intake than to competitive and aggressive interactions, potentially resulting in higher levels of stress for subordinates. |
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refbase @ user @ |
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813 |
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| Author |
Boyd, L.E. |
| Title |
The behaviour of Przewalski's horses and its importance to their management |
Type |
Journal Article |
| Year |
1991 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
29 |
Issue |
1-4 |
Pages |
301-318 |
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Przewalski's horses (Equus przewalskii) are believed to be extinct in the wild; the current known population of 797 animals exists wholly in zoos. The Species Survival Commission of the International Union for Conservation of Nature and Natural Resources is proposing to reintroduce this endangered species into its former Mongogian habitat within the next decade. Knowledge of the behavior of harem-forming equids in general and of Przewalski's horses in particular, is of great importance to the captive propagation and eventual reintroduction of this species. Horses are rarely solitary by nature. Solitary captive animals are prone to pacing. Juvenile male feral horses (Equus caballus) form bachelor herds upon dispersal from their natal band. Zoos can set up bachelor herds as a way of managing surplus males. The older, more dominant feral horse bachelors are the first to acquire mares. Bachelors do not generally obtain females until they are 4 or 5 years of age. The first females acquired are usually 1- and 2-year-old fillies dispersing from their natal band. Because of the age differential, the stallions are generally dominant to their mares. Behavioral impotence may result if captive stallions are given a harem at too young an age, especially if the harem contains older, more dominant, females. Typical harem sizes in the wild are 3-5 mares. Captive stallions with too large a harem may become either apathetic or aggressive toward their mares. Wild horses spend 60-70% of their time foraging. Captive animals may quickly consume their limited amounts of food and develop vices out of boredom. Provision of hay ad libitum reduces the amount of pacing seen in captive animals, and virtually eliminates coprophagy. |
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Equine Behaviour @ team @ |
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2214 |
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| Author |
Kaseda Y, |
| Title |
Some factors affecting on the population dynamics of two herds in Misaki feral horses |
Type |
Journal Article |
| Year |
1991 |
Publication |
Animal Science and Technology |
Abbreviated Journal |
Anim Sci Tech |
| Volume |
62 |
Issue |
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Pages |
1171-1178 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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yes |
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1238 |
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Klingel, H. |
| Title |
Dix ans parmi les zèbres |
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Journal Article |
| Year |
1991 |
Publication |
Terre Sauvage |
Abbreviated Journal |
Terre Sauvage |
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48 |
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34-43 |
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from Professor Hans Klingels Equine Reference List |
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yes |
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1321 |
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Klingel, H. |
| Title |
Tausend Zebras im Computer |
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Journal Article |
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1991 |
Publication |
Das Tier |
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Das Tier |
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10 |
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8-16 |
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from Professor Hans Klingels Equine Reference List |
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yes |
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1322 |
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McDonnell, S.M.; Henry,M. Bristol, F. |
| Title |
Spontaneous erection and masturbation in equids Proc 35th |
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Journal Article |
| Year |
1991 |
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J. Reprod. Fert. Suppl |
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44 |
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664-665 |
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Horse; Masturbation; Erection; Aversive conditioning; Sexual behavior; Ejaculation; Semen |
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This paper is part of the special issue entitled “Proceedings of the 4th International Symposium on Stallion Reproduction”, Guest Edited by Dr. Edward Squires. |
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1378 |
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