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Author |
Herder, S.L. |
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Title |
More cardiac dressage: galop, gallop, gal(l)opitty glop |
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Journal Article |
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Year |
1989 |
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JAMA : the Journal of the American Medical Association |
Abbreviated Journal |
Jama |
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Volume |
262 |
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3 |
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352 |
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Keywords |
Animals; Gait; *Heart Rate; Horses; Humans; Terminology; *Wit and Humor |
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English |
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0098-7484 |
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PMID:2739033 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3757 |
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Author |
Huizinga, H.A.; van der Meij, G.J.W. |
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Title |
Estimated parameters of performance in jumping and dressage competition of the Dutch Warmblood horse |
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Journal Article |
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Year |
1989 |
Publication |
Livestock Production Science |
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Volume |
21 |
Issue |
4 |
Pages |
333-345 |
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Abstract |
The objective of this study is to estimate several genetic parameters in the Dutch Warmblood riding horse population. The traits involved are performances in jumping and dressage competition. The following parameters are estimated: heritabilities for jumping and dressage; phenotypic and genetic correlations between jumping and dressage; and phenotypic and genetic correlations between performances at different ages. These parameters are estimated by restricted maximum likelihood (REML). Data are from 6899 horses with performances in jumping and 10 408 horses with performances in dressage competition. The horses are sired by 205 and 237 stallions for the two traits, respectively. The progeny range in age from 4 to 8 years old. The performance trait is a cumulatively derived score, that reflects the level of performance in competition. A square root transformation of the score is most appropriate to normalize the data. For estimation of phenotypic and genetic parameters the data is split into two data sets according to the age of the sires (offspring sired by older vs. younger stallions). For estimating correlations between performances at 4, 5 and 6 years of age, performances of the offspring out of previous years are linked to the data. The most unbiased estimates of heritability for jumping and dressage are from data derived from the youngest offspring sired by the younger stallions and are 0.20 and 0.10, respectively. Genetic correlation between jumping and dressage ranges from -0.27 to 0.10. The phenotypic correlation between these traits ranges from 0.15 to 0.26. Phenotypic and genetic correlations between performances at 4, 5 and 6 years average 0.95 and 0.75, respectively. These latter results have important implications for genetic evaluation of breeding candidates in the population. |
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Call Number |
refbase @ user @ |
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3966 |
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Author |
McCall, C.A. |
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Title |
The effect of body condition of horses on discrimination learning abilities |
Type |
Journal Article |
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Year |
1989 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
22 |
Issue |
3-4 |
Pages |
327-334 |
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Abstract |
Discriminative learning abilities were studied in 12 mature, malnourished horses. All horses initially received a condition score (CS) between 2 and 4 on a scale of 1 (poor) to 9 (extremely fat). Then horses were assigned to one of 3 treatments based on their eventual, rehabilitated CS during discrimination testing: thin, CS 1-3; moderate, CS 4-6; and fat, CS 7-9. The discrimination learning task was performed for 14 days with a maximum of 20 trials per day. Daily criterion was set at eight consecutively correct trails. Total trials to first criteria and total errors during testing were recorded. Analysis of variance showed that treatments did not differ (P>0.05) in total trials to first criterion, however horses on the fat treatment did have higher total error scores (P<0.05) than horses on the thin or moderate treatments. This difference was probably owing to lack of motivation in the fat treatment horses, rather than to true learning ability differences. The sex of the horse did not significantly affect either learning score. |
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no |
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Call Number |
Equine Behaviour @ team @ |
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3570 |
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Author |
Rubenstein, D.I.; Hohmann, M.E |
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Title |
Parasites and Social Behavior of Island Feral Horses |
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Journal Article |
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Year |
1989 |
Publication |
Oikos |
Abbreviated Journal |
Oikos |
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Volume |
3 |
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Pages |
312-320 |
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Abstract |
The horses of Shackelford Banks, North Carolina, USA, are heavily parasitized by intestinal worms and harassed by dipterans, and although both types influence behavior only internal parasites affect bodily condition and the structuring of horse society. Thirteen species of internal parasites were identified, but only 4 of 13 groups contain them all and even within groups differences among individuals are large. Among individuals ova emissions vary ranging from 50 to 76,875 eggs per gram. The most important environmental factors influencing egg production are season and a group's location on the island, presumably because of salinity and soil differences and their effects on ova survival. Of the social and life history factors, age, and group size, but neither reproductive state nor dominance status are important. The fitness consequences of internal parasitism may be large since the number emitted is negatively correlated with next year's bodily condition. Biting fly burdens are also affected by a variety of environmental factors. In general, horses are covered with more flies on sunny days, when winds are moderately brisk, when occupying dunes, and around mid-day. In contrast to endoparasites, fly burden is affected by reproductive condition and dominance status and tends to decrease as groups increase in size. Since groups do not grow very large, nor do females attempt to bring groups together, the negative effects of endoparasites appear to overide those associated with ectoparasites. Consequently, endoparasites appear to exert a stronger influence on social structure, even though ectoparasites seem to play a stronger role in shaping details of behavior. |
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Equine Behaviour @ team @ |
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2360 |
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Author |
Gao, X; Gu, J. |
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Title |
The distribution and status of the Equidae in China. |
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Journal Article |
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Year |
1989 |
Publication |
Acta Theriologica Sinica |
Abbreviated Journal |
Acta Theriol. Sin. |
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Volume |
9 |
Issue |
4 |
Pages |
269-274 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
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Serial |
1101 |
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Author |
Crowell-Davis, S.L.; Caudle, A.B. |
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Title |
Coprophagy by foals: recognition of maternal feces |
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Journal Article |
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Year |
1989 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
24 |
Issue |
3 |
Pages |
267-272 |
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Abstract |
Six foals were each observed for 4 h per week during the first 6 weeks of life in an experimental situation in which they had access to feces taken from their mother and from another mare which was not pregnant or lactating. The foals sniffed at the feces equally. Two foals engaged in a total of seven bouts of coprophagy. All bouts of coprophagy involved maternal feces (χ2; P<0.01). |
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Call Number |
Equine Behaviour @ team @ |
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2273 |
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Author |
Cheney, D.L.; Seyfarth, R.M. |
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Title |
Reconciliation and redirected aggression in vervet monkeys, Behaviour |
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Journal Article |
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Year |
1989 |
Publication |
Behaviour |
Abbreviated Journal |
Behaviour |
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110 |
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258-275 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4865 |
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Author |
Hutchinson, G.W.; Abba, S.A.; Mfitilodze, M.W. |
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Title |
Seasonal translation of equine strongyle infective larvae to herbage in tropical Australia |
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Journal Article |
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Year |
1989 |
Publication |
Veterinary Parasitology |
Abbreviated Journal |
Vet Parasitol |
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33 |
Issue |
3-4 |
Pages |
251-263 |
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Keywords |
Animals; Feces/*parasitology; Horses; Queensland; Seasons; Strongyle Infections, Equine/*parasitology; Strongyloidea/growth & development/*physiology; Strongylus/growth & development/*physiology; Tropical Climate |
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Longevity in faeces, migration to and survival on herbage of mixed strongyle infective larvae (approximately 70% cyathostomes: 30% large strongyles) from experimentally deposited horse faeces was studied in the dry tropical region of North Queensland for up to 2 years. Larvae were recovered from faeces deposited during hot dry weather for a maximum of 12 weeks, up to 32 weeks in cool conditions, but less than 8 weeks in hot wet summer. Translation to herbage was mainly limited to the hot wet season (December-March), except when unseasonal winter rainfall of 40-50 mm per month in July and August allowed some additional migration. Survival on pasture was estimated at 2-4 weeks in the summer wet season and 8-12 weeks in the autumn-winter dry season (April-August). Hot dry spring weather (pre-wet season) was the most unfavourable for larval development, migration and survival. Peak counts of up to 60,000 larvae kg-1 dry herbage were recorded. The seasonal nature of pasture contamination allowed the development of rational anthelmintic control programs based on larval ecology. |
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Graduate School of Tropical Veterinary Science, James Cook University of North Queensland, Townsville, Australia |
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0304-4017 |
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Notes |
PMID:2815535 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2672 |
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Author |
de Waal, F. B. |
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Title |
Dominance “style” and primate social organization. |
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Book Chapter |
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Year |
1989 |
Publication |
Comparative Socioecology |
Abbreviated Journal |
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243-263 |
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Blackwell Science |
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Editor |
Standen, V.; Foley, R. A. |
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978-0632023615 |
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refbase @ user @ |
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2864 |
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Author |
McHugh, C.P. |
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Title |
Ecology of a semi-isolated population of adult Anopheles freeborni: abundance, trophic status, parity, survivorship, gonotrophic cycle length, and host selection |
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Year |
1989 |
Publication |
The American Journal of Tropical Medicine and Hygiene |
Abbreviated Journal |
Am J Trop Med Hyg |
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41 |
Issue |
2 |
Pages |
169-176 |
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Aging/physiology; Animals; Anopheles/*physiology; Breeding; California; Cattle/parasitology; Dogs/parasitology; Ecology; Feeding Behavior/physiology; Female; Horses/parasitology; Host-Parasite Relations; Male; Parity; Population Density; Rabbits/parasitology |
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A population of adult Anopheles freeborni near Sheridan, CA was sampled daily during 13 August-7 September 1984. Data on abundance, trophic status, and gonotrophic age were recorded. Abundance and gonotrophic age data were analyzed to estimate daily survivorship and gonotrophic cycle length. Daily survivorship for unfed mosquitoes was estimated to be 0.72 with a gonotrophic cycle of 6 days duration. Daily survivorship for bloodfed mosquitoes was estimated to be 0.74 with a gonotrophic cycle of 4 days. The 2 day difference in gonotrophic cycles between unfed and bloodfed mosquitoes was the result of the period required for maturation and mating of teneral females. In 1986, an incage release of field-collected females estimated survivorship at 0.75 per day. Precipitin tests of 1,338 blood-engorged mosquito abdomens indicated that bovids, horses, rabbits, and canids comprised 92% of bloodmeals; no bloodmeals of human origin were detected. |
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Department of Entomology, University of California, Davis |
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0002-9637 |
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PMID:2774063 |
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Call Number |
Equine Behaviour @ team @ |
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2673 |
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