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Author Hinrichs, K.; Watson, E.D.; Kenney, R.M.
Title Granulosa cell tumor in a mare with a functional contralateral ovary Type Journal Article
Year 1990 Publication Journal of the American Veterinary Medical Association Abbreviated Journal J Am Vet Med Assoc
Volume 197 Issue 8 Pages 1037-1038
Keywords Animals; Corpus Luteum/*physiopathology; Female; Granulosa Cell Tumor/pathology/physiopathology/*veterinary; Horse Diseases/*pathology/physiopathology; Horses; Ovarian Neoplasms/pathology/*veterinary; Ovary/*pathology/physiopathology
Abstract A functional corpus luteum was found in the ovary contralateral to the ovary with a granulosa cell tumor in a 24-year-old Standardbred mare. The mare was ovariectomized because she was to be used as a jump mare for collection of semen from stallions. The blood concentration of progesterone was 2.2 ng/ml, and the luteal tissue progesterone concentration was 6.3 micrograms/mg. Atrophy of the contralateral ovary is one of the major signs used in diagnosis of granulosa cell tumor; however, our findings indicate that the ovary contralateral to a granulosa cell tumor is not invariably nonfunctional.
Address Department of Medicine, School of Veterinary Medicine, Tufts University, North Grafton, MA 01536
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ISSN 0003-1488 ISBN Medium
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Notes PMID:2243036 Approved no
Call Number Equine Behaviour @ team @ Serial 3802
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Author Huizinga, H.A.; Boukamp, M.; Smolders, G.
Title Estimated parameters of field performance testing of mares from the Dutch Warmblood riding horse population Type Journal Article
Year 1990 Publication Livestock Production Science Abbreviated Journal
Volume 26 Issue 4 Pages 291-299
Keywords competition; genetic parameters; horse breeding; mares; performance test
Abstract The field performance testing (FPT) of mares of the Dutch Warmblood riding horse population is evaluated. Phenotypic and genetic parameters of scored traits are estimated and the genetic relationship with performance of half-sibs in dressage and jumping competition are estimated. Data from 1984 to 1987 are used, covering scores from 2023 at least 3-year-old mares. Seven subjectively scored traits are considered, walk, trot, canter, riding ability, character, jumping ability and total score. Analysis of data is according to a sire model. Variance and covariance components are estimated by Restricted Maximum Likelihood (REML) procedures. Estimates of heritability are moderately low for gaits (average 0.19), jumping ability (0.15) and total score (0.17) and extremely low for riding ability (0.03) and character (0.06). Dressage in competition is most correlated with riding ability (0.83) and is moderately correlated with total score (0.41) from FPT of mares. Jumping competition is most correlated with jumping ability (0.48) and not correlated with total score (0.05) from field test of mares. Some possible bias owing to previous knowledge and preselection is discussed. It is concluded that efficiency of present FPT of mares is limited for selection of broodmares for dressage and jumping ability in competition.
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Call Number refbase @ user @ Serial 3964
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Author Philipsson, J.; Arnason, T.; Bergsten, K.
Title Alternative selection strategies for performance of the Swedish warmblood horse Type Journal Article
Year 1990 Publication Livestock Production Science Abbreviated Journal
Volume 24 Issue 3 Pages 273-285
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Abstract The Swedish riding horse population includes about 6000 broodmares and 150 breeding stallions. The overall breeding goal is to produce riding horses competitive in several disciplines, i.e. dressage as well as showjumping and eventing. The effectiveness of this multi-purpose objective was studied in alternative strategies for selecting stallions and mares as candidate dams for them. The alternative selection strategies for stallions included 1-stage (conformation), 2-stage (conformation and performance test) and 3-stage (conformation, performance test and competition results at advanced levels) selection schemes. The mare selection schemes included the corresponding 1- and 2-stage selection schemes. The results clearly showed the 2-stage selection procedure to be most efficient, especially for stallions. It is important that the intensity in selection after the performance test is kept high. Differences in defining the breeding objective are less important, provided the selection is based on a performance test including both dressage and jumping. According to the results, the development of the Swedish performance testing scheme, in which now only 30% of the tested stallions are selected for breeding, seems justified. In mare selection schemes, performance tests also seem to be justified, especially if jumping ability is to be improved. Differences between field and station tests are only minor and since the volume of testing can be much higher in the field this would allow a much stronger selection and should thus be preferred.
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Call Number refbase @ user @ Serial 3965
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Author Potter, G.D.; Yeates, B.F.
Title Behavioral principles of training and management Type Journal Article
Year 1990 Publication The Horse, 2nd Edn Abbreviated Journal
Volume Issue Pages 665-682
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Notes Cited By (since 1996): 4; Export Date: 21 October 2008 Approved no
Call Number Equine Behaviour @ team @ Serial 4540
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Author Cheney, D.L.; Seyfarth, R.M.
Title How Monkeys See the World Type Miscellaneous
Year 1990 Publication Abbreviated Journal
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Call Number Equine Behaviour @ team @ Serial 4866
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Author Cords, M.
Title 13th Cong. Int. Primat Soc Type Miscellaneous
Year 1990 Publication Abbreviated Journal
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Call Number Equine Behaviour @ team @ Serial 4925
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Author Tooze, Z.J.; Harrington, F.H.; Fentress, J.C.
Title Individually distinct vocalizations in timber wolves, Canis lupus Type Journal Article
Year 1990 Publication Anim Behav Abbreviated Journal
Volume 40 Issue Pages
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Call Number Equine Behaviour @ team @ Tooze1990 Serial 6468
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