Retrospective study of hindquarter asymmetry in Standardbred Trotters and its correlation with performance
Tóm tắt
Five hundred four‐year‐old Standardbred Trotters in training were examined in a study on the correlation between conformation, soundness and racing performance. In 39 horses marked hindquarter asymmetries were observed when they were standing squarely on all four feet. The asymmetries were seen as obvious height differences between the left and right tubera sacrale. In 30 cases the left tuber sacrale was lower and in nine cases the right tuber sacrale was lower. The horses showing hindquarter asymmetry were of significantly larger body size than the 461 horses not showing the asymmetry. There was no sex difference in the incidence of hindquarter asymmetry. The asymmetric horses had significantly lower total earnings, a lower number of races per horse and less good racing records (min/km) than the remaining 461 horses. The trainers reported that the asymmetric horses often had difficulties in performing at speed. In most horses, the asymmetry had not been observed until the examination. Past clinical records of 11 of the 30 asymmetric horses were available. In only one of the 11 horses had the asymmetry been considered of clinical importance. It was concluded that the described hindquarter asymmetries are important signs indicating that there is an enhanced risk that the affected horses will not become successful Trotters.
Từ khóa
Tài liệu tham khảo
Adams O. R., 1974, Lameness in Horses, 292
Barr A. J., 1979, SAS User's guide
Björck G., 1958, Studies on the draught force of horses, Acta Agric. Scand., 1
Crawford W. H., 1982, A controversy on mechanics of sacroiliac arthrosis in the horse, Can. vet. J., 23, 143
Dalin G., 1973, Ergonomic aspects of locomotor asymmetry in Standardbred horses trotting through turns, Acta. vet. scand., 111
Fredricson I., 1972, Equine joint kinematics and coordination, Acta. vet. Scand., 1
Jeffcott L. B., 1982, Pelvic lameness in the horse, Equine Pract., 4, 21
Koch D. B., 1980, Differential diagnosis and management of back pain in the horse, California vet., 34, 28
Magnusson L.‐E., 1985, Studies on the conformation and related traits of Standardbred trotters in Sweden. I. An objective method for measuring the equine conformation, Z. Tierzücht. ZüchtBiol
Magnusson L.‐E., 1985, Studies on the conformation and related traits of Standardbred trotters in Sweden. II. The variation in conformation of the Standardbred trotter, Z. Tierzücht. ZüchtBiol
Magnusson L.‐E., 1985, Studies on the conformation and related traits of Standardbred trotters in Sweden. III. The orthopedic health status of the Standardbred trotter at 4‐years of age, Z. Tierzücht. ZüchtBiol
Magnusson L.‐E., 1985, Studies on the conformation and related traits of Standardbred trotters in Sweden. IV. Relationships between the conformation and soundness of 4‐year old Standardbred trotters, Z. Tierzücht. ZüchtBiol
Rooney J. R., 1977, Sacroiliac arthrosis and stifle lameness, Mod. vet. Pract., 58, 138
Rooney J. R., 1981, The cause and prevention of sacroiliac arthrosis in the Standardbred horse: A theoretical study, Can. vet. J., 22, 356
Schmaltz R., 1906, Konstruktion und Grösse der Standwinkel an den Beinen des Pferdes, Berl. tierärztl. Wschr., 14, 257
Thafvelin B. C., 1985, Studies on the conformation and related traits of Standardbred trotters in Sweden. V. Relationships between the conformation and performance of 4‐year old Standardbred trotters, Z. Tierzücht. ZüchtBiol
Vennerholm J.(1923)Hästen som handelsvara och försäkringsobjekt(The horse as merchandise and insurance object). A. B. Hasse W. Tullbergs förlag Stockholm.