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Author |
Breen, M.; Downs, P.; Irvin, Z.; Bell, K. |
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Title |
Intrageneric amplification of horse microsatellite markers with emphasis on the Przewalski's horse (E. przewalskii) |
Type |
Journal Article |
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Year |
1994 |
Publication |
Animal Genetics |
Abbreviated Journal |
Anim Genet |
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Volume |
25 |
Issue |
6 |
Pages |
401-405 |
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Keywords |
Animals; DNA, Satellite/*genetics; *Gene Amplification; Gene Frequency; *Genetic Markers; Heterozygote; Horses/*genetics; Species Specificity |
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Abstract |
Primer sequences flanking 13 microsatellite loci isolated from the domestic horse (E. caballus) were successfully used to amplify homologous loci in the Przewalski's horse (E. przewalskii). The results demonstrate that the level of polymorphism at all 13 loci in the Przewalski's horse was comparable to that in the domestic horse and the overall exclusion probability in the Przewalski's horse was calculated to be 0.9994. The results suggest that it should be possible to use E. caballus-derived microsatellite markers to provide parentage verification and additional valuable information to the captive management of E. przewalskii. The ability to amplify corresponding loci in the remaining five species of the genus was also confirmed, illustrating the general application of markers isolated from the domestic horse to the evaluation of polymorphism in the other six species of the genus. |
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Australian Equine Blood Typing Research Laboratory, University of Queensland, St Lucia |
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0268-9146 |
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Notes |
PMID:7695120 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2246 |
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Author |
Kuckelkorn, B. |
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Title |
Assessment of pregnancy in Kiang mares (Equus hemionus holdereri ) using estrogen determination in feces |
Type |
Journal Article |
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Year |
1994 |
Publication |
Theriogenology |
Abbreviated Journal |
Theriogenology |
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Volume |
42 |
Issue |
1 |
Pages |
37-42 |
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Abstract |
Analysis of fecal estrogens was used to diagnose pregnancy in 6 Kiang mares (Equus hemionus holdereri ) that were kept at Tierpark Berlin. Three extraction methods were compared and were followed by an established RIA for total estrogen. Extraction of desiccated feces with chloroform/n-hexane and KOH, with and without enzyme hydrolysis showed better results than extraction with diethylether without hydrolysis. Pregnancy was confirmed by observation of foaling in 2 mares that showed estrogen concentrations between 800 and 1800 ng/g and in 1 mare that showed widely fluctuating values between 500 and 1300 ng/g of feces. Two mares with estrogen concentrations below 500 ng/g were not seen to foal. The method using chloroform/n-hexane and KOH without enzyme hydrolysis seems practical for non-invasive evaluation of the endocrine status in this endangered Equidae species. |
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Institute for Zoo Biology and Wildlife Research Alfred-Kowalke-Str. 17, 10315 Berlin, Germany |
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0093-691X |
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PMID:16727510 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2335 |
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Author |
Dierenfeld, E.S. |
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Title |
Vitamin E in exotics: effects, evaluation and ecology |
Type |
Journal Article |
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Year |
1994 |
Publication |
The Journal of Nutrition |
Abbreviated Journal |
J Nutr |
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Volume |
124 |
Issue |
12 Suppl |
Pages |
2579s-2581s |
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Keywords |
Animal Feed/*analysis; Animals; Animals, Zoo/blood/*metabolism; Antelopes/blood/metabolism; Birds/blood/metabolism; Deer/blood/metabolism; Elephants/blood/metabolism; Equidae/blood/metabolism; Perissodactyla/blood/metabolism; Vitamin E/*administration & dosage/analysis/blood; Vitamin E Deficiency/pathology/physiopathology/veterinary |
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Abstract |
The pathophysiology and lesions associated with vitamin E deficiency are similar between domestic and exotic species, and circulating plasma concentrations are also similar between comparable groups. However, many ecological variables must be considered for the most relevant comparisons. Tissue values of vitamin E, apart from plasma, are unknown for most exotics. Dietary vitamin E requirements of exotic species and domestics appear to differ; based on natural foodstuff analyses and clinical observations, between 50 and 200 mg vitamin E/kg DM are necessary to prevent vitamin E deficiency, 5- to 10-fold higher than current livestock recommendations. |
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Department of Nutrition, Wildlife Health Center, Wildlife Conservation Society, Bronx, NY 10460 |
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ISSN |
0022-3166 |
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Notes |
PMID:7996243 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2661 |
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Author |
Connor, R.J.; Kawaoka, Y.; Webster, R.G.; Paulson, J.C. |
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Title |
Receptor specificity in human, avian, and equine H2 and H3 influenza virus isolates |
Type |
Journal Article |
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Year |
1994 |
Publication |
Virology |
Abbreviated Journal |
Virology |
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Volume |
205 |
Issue |
1 |
Pages |
17-23 |
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Keywords |
Amino Acid Sequence; Amino Acids/genetics; Animals; Carbohydrate Sequence; Chick Embryo; Hemagglutinin Glycoproteins, Influenza Virus; Hemagglutinins, Viral/genetics; Influenza A virus/*metabolism; Molecular Sequence Data; Receptors, Virus/*metabolism; Species Specificity; Viral Envelope Proteins/genetics |
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Abstract |
The receptor specificity of 56 H2 and H3 influenza virus isolates from various animal species has been determined to test the relevance of receptor specificity to the ecology of influenza virus. The results show that the receptor specificity of both H2 and H3 isolates evaluated for sialic acid linkage specificity and inhibition of hemagglutination by horse serum correlates with the species of origin, as postulated earlier for H3 strains based on a limited survey of five human, three avian, and one equine strain. Elucidation of the amino acid sequence of several human H2 receptor variants and analysis of known sequences of H2 and H3 isolates revealed that receptor specificity varies in association with an amino acid change at residues 228 in addition to the change at residue 226 previously documented to affect receptor specificity of H3 but not H1 isolates. Residues 226 and 228 are leucine and serine in human isolates, which preferentially bind sialic acid alpha 2,6-galactose beta 1,4-N-acetyl glucosamine (SA alpha 2,6Gal), and glutamine and glycine in avian and equine isolates, which exhibit specificity for sialic acid alpha-2,3-galactose beta-1,3-N-acetyl galactosamine (SA alpha 2,3Gal). The results demonstrate that the correlation of receptor specificity and species of origin is maintained across both H2 and H3 influenza virus serotypes and provide compelling evidence that influenza virus hosts exert selective pressure to maintain the receptor specificity characteristics of strains isolated from that species. |
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Address |
Department of Biological Chemistry, UCLA School of Medicine 90024-1737 |
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English |
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ISSN |
0042-6822 |
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Notes |
PMID:7975212 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2662 |
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Author |
Straatsma, G.; Samson, R.A.; Olijnsma, T.W.; Op Den Camp, H.J.; Gerrits, J.P.; Van Griensven, L.J. |
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Title |
Ecology of Thermophilic Fungi in Mushroom Compost, with Emphasis on Scytalidium thermophilum and Growth Stimulation of Agaricus bisporus Mycelium |
Type |
Journal Article |
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Year |
1994 |
Publication |
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Abbreviated Journal |
Appl Environ Microbiol |
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Volume |
60 |
Issue |
2 |
Pages |
454-458 |
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Abstract |
Twenty-two species of thermophilic fungi were isolated from mushroom compost. Scytalidium thermophilum was present in the compost ingredients, fresh straw, horse droppings, and drainage from compost and dominated the fungal biota of compost after preparation. Of 34 species of thermophilic fungi tested, 9 promoted mycelial growth of Agaricus bisporus on sterilized compost: Chaetomium thermophilum, an unidentified Chaetomium sp., Malbranchea sulfurea, Myriococcum thermophilum, S. thermophilum, Stilbella thermophila, Thielavia terrestris, and two unidentified basidiomycetes. These species will be considered for future experiments on inoculation and more controlled preparation of compost. |
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Address |
Mushroom [ill] Station, Horst, The Netherlands |
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ISSN |
0099-2240 |
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Notes |
PMID:16349175 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2664 |
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Author |
Andrews, F.M.; Ralston, S.L.; Sommardahl, C.S.; Maykuth, P.L.; Green, E.M.; White, S.L.; Williamson, L.H.; Holmes, C.A.; Geiser, D.R. |
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Title |
Weight, water, and cation losses in horses competing in a three-day event |
Type |
Journal Article |
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Year |
1994 |
Publication |
Journal of the American Veterinary Medical Association |
Abbreviated Journal |
J Am Vet Med Assoc |
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Volume |
205 |
Issue |
5 |
Pages |
721-724 |
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Keywords |
Animals; Body Water/*metabolism; Body Weight/*physiology; Exertion/*physiology; Female; Horses/blood/*metabolism; Male; Physical Conditioning, Animal/physiology; Physical Endurance/physiology; Potassium/*blood; Sodium/*blood |
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Abstract |
Body weight of 48 horses competing in a 3-day event was measured the day before the event (baseline), following the dressage phase of the event (day 1), after the endurance phases of the event (day 2), and 18 to 24 hours after the endurance phases (day 3). Plasma sodium and potassium concentrations were measured the evening before, immediately after, and 10 minutes after the endurance phases. Total body water, water loss, and net exchangeable cation loss were then calculated. Body weight and total body water were significantly decreased, compared with baseline values, at all times during the event, and significant water loss was detected. The largest changes were recorded after the endurance phases of the event. Water deficits were still detected 18 to 24 hours after the endurance phases of the event. Mean plasma sodium concentration was significantly increased immediately after the endurance phases of the event, compared with concentration measured the evening before, and remained increased after the 10-minute recovery period, presumably because of dehydration. Mean plasma potassium concentration was significantly increased immediately after the endurance phases of the event, compared with concentration measured the evening before, but was not increased after the 10-minute recovery period. |
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Address |
Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville 37901-1071 |
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ISSN |
0003-1488 |
ISBN |
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Notes |
PMID:7989242 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3745 |
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Author |
Clayton, H.M. |
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Title |
Comparison of the stride kinematics of the collected, working, medium and extended trot in horses |
Type |
Journal Article |
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Year |
1994 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
26 |
Issue |
3 |
Pages |
230-234 |
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Keywords |
Analysis of Variance; Animals; Biomechanics; Female; Forelimb/anatomy & histology/physiology; Gait/*physiology; Hindlimb/anatomy & histology/physiology; Horses/anatomy & histology/*physiology; Locomotion/physiology; Male; Motion Pictures |
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Abstract |
Highly-trained dressage horses were studied to test the hypothesis that stride length is altered independently of stride duration in the transitions between the collected, working, medium and extended trot. Six well-trained dressage horses were filmed at a frame rate of 150 frames/s performing the collected, working, medium and extended trots in a sand arena. Temporal, linear and angular data were extracted from the films, with 4 strides being analysed for each horse and gait type. There were no significant asymmetries between the left and rights limbs or diagonals when data from the whole group were pooled, but 3 horses showed asymmetries in one or more variables (P < 0.01). Analysis of variance and post-hoc tests indicated that the speed increased significantly (P < 0.01) from the collected (3.20 m/s) to the working (3.61 m/s) to the medium (4.47 m/s) to the extended (4.93 m/s) trot. The increases in speed were associated with a significant increase in stride length from 250 cm in the collected trot, to 273 cm in the working trot, 326 cm in the medium trot and 355 cm in the extended trot (P < 0.01). The lengthening of the stride was a result of increases between each gait type in the over-reach distance, whereas the diagonal distance was significantly longer in the extended than the collected trot only (P < 0.01). The stride duration tended to decrease as speed increased, and the difference became significant between the collected and extended trots (P < 0.01). |
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Address |
Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada |
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ISSN |
0425-1644 |
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Notes |
PMID:8542844 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3746 |
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Author |
Atock, M.A.; Williams, R.B. |
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Title |
Welfare of competition horses |
Type |
Journal Article |
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Year |
1994 |
Publication |
Revue Scientifique et Technique (International Office of Epizootics) |
Abbreviated Journal |
Rev Sci Tech |
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Volume |
13 |
Issue |
1 |
Pages |
217-232 |
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Keywords |
*Animal Welfare; Animals; Doping in Sports; Ethics; Heat; Horses/*physiology; Housing, Animal/standards; Humidity; International Cooperation; Sports/*standards; Transportation/standards; Veterinary Medicine |
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Abstract |
In the large majority of cases and circumstances, horses benefit from their association with man. However, abuse of horses can occur, due to neglect or through the pressures of competition. The welfare of all animals, including competition horses, has become increasingly topical over the past ten years. Equestrian sport is coming under closer public scrutiny due to reports of apparent abuse. The bodies responsible for regulating these sports strenuously endeavour to protect the welfare of horses which compete under their rules and regulations. The Federation Equestre Internationale (FEI: International Equestrian Federation) is the sole authority for all international events in dressage, show-jumping, three-day event, driving, endurance riding and vaulting. The FEI rules illustrate the ways in which the welfare of competing horses is safeguarded. |
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Address |
Federation Equestre Internationale, Lausanne, Switzerland |
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ISSN |
0253-1933 |
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Notes |
PMID:8173097 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3747 |
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Author |
Chiba, K.; Ikai, A.; Kawamura-Konishi, Y.; Kihara, H. |
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Title |
Kinetic study on myoglobin refolding monitored by five optical probe stopped-flow methods |
Type |
Journal Article |
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Year |
1994 |
Publication |
Proteins |
Abbreviated Journal |
Proteins |
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Volume |
19 |
Issue |
2 |
Pages |
110-119 |
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Keywords |
Animals; Chromatography, Gel; Circular Dichroism; Horses; Kinetics; Metmyoglobin/analogs & derivatives/chemistry; Myoglobin/*chemistry; *Protein Folding; Spectrometry, Fluorescence; Spectrophotometry, Ultraviolet; Urea |
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Abstract |
The refolding kinetics of horse cyanometmyoglobin induced by concentration jump of urea was investigated by five optical probe stopped-flow methods: absorption at 422 nm, tryptophyl fluorescence at around 340 nm, circular dichroism (CD) at 222 nm, CD at 260 nm, and CD at 422 nm. In the refolding process, we detected three phases with rate constants of > 1 x 10(2) s-1, (4.5-9.3) s-1, and (2-5) x 10(-3) s-1. In the fastest phase, a substantial amount of secondary structure (approximately 40%) is formed within the dead time of the CD stopped-flow apparatus (10.7 ms). The kinetic intermediate populated in the fastest phase is shown to capture a hemindicyanide, suggesting that a “heme pocket precursor” recognized by hemindicyanide must be constructed within the dead time. In the middle phase, most of secondary and tertiary structures, especially around the captured hemindicyanide, have been constructed. In the slowest phase, we detected a minor structural rearrangement accompanying the ligand-exchange reaction in the fifth coordination of ferric iron. We present a possible model for the refolding process of myoglobin in the presence of the heme group. |
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Address |
Laboratory of Biodynamics, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Kanagawa, Japan |
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ISSN |
0887-3585 |
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Notes |
PMID:8090705 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3799 |
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Permanent link to this record |
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Author |
Dugatkin, L.A.; Wilson, D.S. |
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Title |
Choice experiments and cognition: a reply to Lamprecht & Hofer |
Type |
Journal Article |
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Year |
1994 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
47 |
Issue |
6 |
Pages |
1459-1461 |
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Call Number |
refbase @ user @ |
Serial |
479 |
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