제주도마체형에 관한 생물측정학적 연구 = Biostatistic study on the type of the Cheju Horse in Quelpart

다국어 초록 (Multilingual Abstract)

1. Horses employed is this study were Cheju Horses aged five or more which had bees feeding in Cheju Island. They were 102 females and 69 males, selected after general examination of the appearance. Horses in a state of a bad form and type were excluded from this study. Thirty physical characters in each horse were measured by the author, with special attention to the error of measurement. 2. By sex distinotion, the biostatistic constants of measurements and the index numbers of withers height, the variation curve as its fitted normal curve, correlation coefficients, coefficients of regression, regression equations, are obtained, and then the fitting degree of regression equations for withers height to body length and thud width were tested. The ratios of the difference(D) between each mean both males and females to probable error (P.E), the ratios of means males to those of females, indexes of conformation, and a normal type are obtained. On the other hand, Pearson`s coefficient of racial likens, Morant`s reduced coefficient of racial likeness, Poniatowski`s type difference are obtained, and then those were applied to compare Cheju Horses with other breeds. 3. In ths biostatistic constants both males and female coefficients of variability were withers height that they wars the smallest, next hip height. Generally speaking, coefficients of variability in the characters indicating the height of a body were small. The largest coefficient of variability were that of thigh length, next fore pastern length, upperarm length, which are, characters it is difficult to seize the measurement point. In the means, each characters were very small beginning with which withers height of females is 113.18 ㎝, of males 111.18 ㎝. 4. In the biostatistic constants of index numbers of withers height, coefficient of variability to those of measurements showed almost the same tendency. On the other hand, both coefficients of variability in the measurements and the index numbers of withers height of Cheju Horses were larger than that of other breeds. These facts show that the form of Cheju Horses are not comparatively unified. 5. When variation curves of each character were compared with those of normal curve, as a whole variation cures were proper, showed nothing particular to be rough. The skewness of forequarter length (+), forearm length (+), hip height (-), hindshank length (+), rump length (-), were significant. The kurtosis of foreshin length (+), hip height (+), rump length (+), shoulder length (+), thigh length (+), chest depth (+), upperarm length (+), were significant. 6. Correlations between withers height, body length, chest depth, chest width, thurl width, chest firth, forearm circum, or foreskin circum representing the height, length, depth, width, or circum and the other characters, and between the characters of one anothers were the positive, with exception of a few characters such as between chest depth and upperarm length, thigh length, or cubit, chest depth and coupling length, chest girth and loin length or forearm length. In most cask the degrees of correlation between withers height or body length and the other parts were high. In order to obtain the increasing or decreasing ratio of the mating character accordion to the increasing and decreasing of one unit of a character, the coefficient of regression and the regression equation were obtained. 7. When means of measurements, index numbers of means of males to females, D/P. E were compared males with females, it was proved that females ware larger than males. But it is the result which is concerned in only the Cheju Horse fed at Cheju Island, not the result which is considered all native horses distributed in all over Korea to be population. 8. Though the Conformation of Cheju Horses were made clear by the above-mentioned biostatistic constants, when Cheju Horses were inquired into index numbers of withers height, in order to investigate judging of a horse`s appearanc