Aşkın Kor

Factor Analysis Scores in a Multiple Linear Regression Model for the Prediction of Carcass Weight in Akkeci Kids

Abstract Keskin, S., Daskiran, I. and Kor, A. 2007. Factor analysis scores in a multiple linear regression model for the prediction of carcass weight in Akkeci kids. J. Appl. Anim. Res., 31: 201–204. In this study, the relationships between carcass weight and 10 body measurements (slaughter weight, withers height, body length, chest depth, chest width, chest circumference, leg circumference, leg width, leg length and rump width) were examined through factor and multiple linear regression analyses. It was observed that three factors e.g. Form, Circumference and Wideness had significant effects on carcass weight and these factors together accounted for 83.9% of variation in carcass weight.

Use of factor analysis scores in multiple linear regression model for determining relationships between milk yield and some udder traits in goats

Abstract Keskin, S., Kor, A. and Karaca, S. 2007. Use of factor analysis scores in multiple linear regression model for determining relationships between milk yield and some udder traits in goats. J. Appl. Anim. Res., 31: 185–188. In present study, the relationships between daily milk yield (DMY) and 10 udder traits (upper height, bottom height, depth, width, circumference, left and right teat length, left and right teat circumference, teat angle) were examined by using of factor analysis scores in multiple linear regression model. Four factors (teat, udder and height measurements and teat angle) with eigenvalues greater than 1 were selected as independent or explanatory variables and used for multiple linear regression analysis. It was found that four factors had significant effects on daily milk yield and these factors together accounted for 75.4% of variation in daily milk yield.

Effects of pre-slaughter diet/management system and fasting period on physiological indicators and meat quality traits of lambs.

This study determined the effects of pre-slaughter diet/management system on blood and rumen parameters and meat-quality traits of Norduz lambs. Eighty lambs were divided into two groups according to diet (AH: alfalfa hay; BAH: alfalfa supplemented with 500 g/head barley) for 21 days. Following this period, lambs from each group were distributed among four groups according to pre-slaughter fasting period as 0, 12, 24 or 48 h. Cortisol concentrations were found to be significantly higher in the 24 h and 48 h groups when compared to the 0 h group (p<0.01). Diet and fasting period had limited effect on muscle glycogen content and ultimate pH·L*, WHC and moisture decreased in line with increases in the fasting period (p<0.01). In conclusion, carcass conformation and some meat quality traits were better in BAH lambs. Fasting had a negative effect on some meat quality parameters, with significant increases in some physiological stress indicators after fasting periods of 24 h or longer.