Repeatabili t ies (t) and heritabilities (h 2) of racing time were estimated from data on 7,206 2and 3-yr-old Standardbred pacers and trotters competing in 1-mile (1.6 km) charted races at six tracks between 1975 and 1978. A total of 38,487 records representing 2,387 sire progeny groups were divided into subsets by gait, age and track. Initially, the designation "class of race" was recognized a...

North American Thoroughbred racing is conducted on three types of surfaces—dirt, turf, and synthetic. The tracks are oval, races run counterclockwise. loading right left limbs expected to differ as a function turn radius, banking, surface, gait asymmetry. Hind forelimbs also have different functions related propulsion turning, respectively. This study uses the Equine Injury Database for race st...

This study was carried out to estimate the heritability of liability to epistaxis in the southern African Thoroughbred population. Data of all horses that suffered epistaxis while racing in southern Africa and Mauritius from 1986 to 2002 and involving 1252 bleeders were analysed. Pedigree data covering the period 1960-1986 was used as required to calculate the incidence of bleeding amongst ance...

BACKGROUND Domesticated horses adapt to environmental conditions through seasonal fluctuations in their metabolic rate. The seasonal change of metabolic rates of domesticated horses in pastures is documented. However, there are few investigations on seasonal body weight change of domesticated horses housed in stables, which are provided constant energy intake throughout the year. Both seasonal ...

When conducting breeding programs and to design systems of mating, the inbreeding population percentage changes should be considered. Crosses non-scientific population of the Iranian Arab horses do it that purity has been threatened. This pedigree breed after DNA tests will be recorded by WAHO. To determine the status of inbreeding in the pedigree mentioned horse population based on information...

Parathyroid hormone (PTH) has been shown to have anabolic and catabolic effects on the skeleton, and in young racing horses the anabolic effects of PTH on bone might be of great importance in reducing the risk of skeletal injury during race training. The aim of this pilot study was to elucidate the effects of intermittent exogenous application of human parathyroid fragment (hPTH 1-37) on calciu...