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    Comparison of Growth Curves of Broiler under Different Stocking Densities by Gompertz Model
    (KAFKAS UNIV, VETERINER FAKULTESI DERGISI, 2013) Sekeroglu, Ahmet; Tahtali, Yalcin; Sarica, Musa; Gulay, M. Sukru; Abaci, Samet Hasan; Duman, Mustafa
    The knowledge of the growth curve in poultry science is very useful for describing growth kinetics and setting commercial management procedures. The objective of this research was to fit the Gompertz growth curve from hatching weights to 42 d-old weights of broilers in 3 stocking density groups. A total of 284 Ross 308 broilers randomly divided into 3 stocking density groups (9, 13 and 17 birds/m(2)) in this experiment. All birds were weighted weekly. The asymptotic weight (A) of broiler chickens for 9, 13 and 17 bird/m(2) stocking density groups were 4198.46, 3807.45 and 3999.92 g, respectively (P<0.05). The growth rates (K) of broiler chickens for 9, 13 and 17 bird/m(2) stocking density groups were 0.055, 0.058 and 0.052, respectively (P<0.01). The coefficient of determination for all stocking density groups were 0.998, 0.997 and 0.996, respectively (P<0.05). Moreover, the mean square error (MSE) value was lowest for 9 bird/m(2) group (P<0.05). The current study suggested that stocking density of 9 bird/m(2) was better for the broiler growth of the different stocking densities on the base of mature live weight (A), coefficient of determination (R-2) and mean square error (MSE).
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    EFFECT OF DISTANCE FROM THE ROADWAY ON HEAVY METAL CONTENT AND EGG QUALITY OF VILLAGE LAYING HEN'S EGG ALONG ROADSIDES OF TOKAT-TURHAL, TURKEY
    (UNIV AGRICULTURE, 2013) Sekeroglu, Ahmet; Sari, Hayati; Sarica, Musa; Yildirim, Arda; Duman, Mustafa
    In this study, the heavy metal contents and egg quality characteristics of chicken eggs was studied. The eggs have been collected at distances of 0-100 (Distance A), 100-200 (Distance B) and 200-300 m (Distance C) away from the edge of Tokat-Turhal road. The distance from roadway had no significant effect on egg Cu and Mn contents (P>0.05), although a significant effect on egg Cd and Pb content (P<0.05) was observed. There were no significant difference in egg shape index, egg shell thickness, breakage strength, egg albumin pH, albumin index, Haugh units and yolk index according to distance from the roadway (P> 0.05). Eggs obtained from distance A and B had significantly higher weight than obtained from distance C (P<0.05). Egg obtained from distance B had significantly lower egg shell colour scales than those of the other distances (P<0.01). And, egg yolk colour was showed a significant variation among the distances away from the roadway, and the highest yolk colour value was detected in distance B (P<0.05). Depending on obtained results, it can be concluded that the egg heavy metal concentrations exceeded background levels for hen eggs. Therefore, consumers should be aware of the possible health risks related by the use of these eggs which has obtained from side of road.
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    Effect of distance from the roadway on heavy metal content and egg quality of village laying hen's egg along roadsides of Tokat-Turhal, Turkey
    (2013) Şekero?lu, Ahmet; Sari, Hayati; Sarica, Musa; Yildirim, Arda; Duman, Mustafa
    In this study, the heavy metal contents and egg quality characteristics of chicken eggs was studied. The eggs have been collected at distances of 0-100 (Distance A), 100-200 (Distance B) and 200-300 m (Distance C) away from the edge of Tokat-Turhal road. The distance from roadway had no significant effect on egg Cu and Mn contents (P>0.05), although a significant effect on egg Cd and Pb content (P<0.05) was observed. There were no significant difference in egg shape index, egg shell thickness, breakage strength, egg albumin pH, albumin index, Haugh units and yolk index according to distance from the roadway (P> 0.05). Eggs obtained from distance A and B had significantly higher weight than obtained from distance C (P<0.05). Egg obtained from distance B had significantly lower egg shell colour scales than those of the other distances (P<0.01). And, egg yolk colour was showed a significant variation among the distances away from the roadway, and the highest yolk colour value was detected in distance B (P<0.05). Depending on obtained results, it can be concluded that the egg heavy metal concentrations exceeded background levels for hen eggs. Therefore, consumers should be aware of the possible health risks related by the use of these eggs which has obtained from side of road.