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Öğe Impact of age and gender on head measurements of Malya sheep(National Centre for Agrarian Sciences, 2016) Çılek S.; Petkova M.This experimental research was carried out with Malya sheep to determinate the effects of age and gender on head measurements. Head measurements were taken from 55 male and 261 female sheep from 1 year-old to 5 or more years-old. Head length, head circumference, head width, distance between ears, ear length and ear width were estimated as head measurements. The least squares method was used to investigate effects of age and gender on these traits. The least squares method was performed using the General Linear Model (GLM) procedure in Minitab package program for statistical analysis. The means of important subgroups as statistic were compared by using Duncan’s multiple range tests. The least squares for head length, head circumference, head width, distance between ears, ear length and ear width were estimated as 32.59±0.17 cm, 49.00±0.18 cm, 13.06±0.07 cm, 20.48±0.10 cm, 15.44±0.10 cm and 8.64±0.04 cm, respectively. The effect of age and gender on all head area measurements were significant (P<0.05) except for the effect on ear length. It can be said that all head area measurements increased significantly with increasing age and males have anatomically bigger head region measurements than females except for ear length. Having shorter ear measurements of males than females in some age groups can be caused by the big individual differences withn Malya breed sheep, which was obtained as a result of combined crossbreeding. © 2016, National Centre for Agrarian Sciences. All rights reserved.Öğe Phenotypic correlations between some body measurements and prediction of body weight of malya sheep(National Centre for Agrarian Sciences, 2016) Çılek S.; Petkova M.This experimental research was carried out to determinate phenotypic correlations among some body measurements of Malya sheep and prediction of body weight from these measurements. By using body measurements of total 316 heads that included male, female, adult and yearlings, phenotypic correlations among some body measurements (wither height, rump height, back height, rump length, rump width, front cannon bone circumference, body length, chest circumference, chest depth, chest length, chest width, tail length, tail-tarsal joint distance, tail width, head length, head circumference, head width, distance between ears, ear length and ear width) were estimated and relationships between body weight and chosen body measurements were investigated. Phenotypic correlation between body weight and all body measurements was favorable and statistically significant (P<0.001). Increase in body weight will occur parallel to the growth of all parts of the body. The Pearson correlation coefficient between body weight with chest circumference, rump height, rump width, body length, chest length, head circumference, tail-tarsal joint distance and tail width were 0.86, 0.56, 0.57, 0.76, 0.70, 0.63, 0.30 and 0.46, respectively. The highest phenotypic correlation was between body weight and chest circumferences. It can be concluded that heart circumference is the most appropriate parameter to estimate body weight of sheep. More confident predictions can be made by using the chest circumference together with other measurements. The regression model for predicting body weight was estimated by using more variables. © 2016, National Centre for Agrarian Sciences. All rights reserved.