بررسی مورفومتریک (ریخت شناختی) برخی اندامهای جوجه مرغهای تخم گذار جهت جایگزینی مرغهای تخمگذار

The experiment was carried out in a poultry field in kermanshah province in 2009. however, ourtarget study was to measure variables and having topic corporal development, as well as the uniformityin bird’s replacement in our fields. the experiment lasted five weeks. for this study, we provided twolocations, one in closed environments under field conditions and other was open and free environmentconditions. for each group we selected 500 chicks which kept and fed them. in this study we measuredand evaluated these variables: the live weight of chickens (there is a slight tendency to the weight differencesbetween groups formed, and it is demonstrated by the average of the data), the length of thetarsus (the discrepancy of the variation in tarsus length is determined by the variation in body weight ofchickens), the distance of the keel to the pubis and the measuring between of two pubic bones (2.1% ofthe variation of the distance from the keel to the pubis and 1.37% of the variation in width between pubis,is determined by the variation of the independent variable (live weight), in chicken). the conditionsof inside and outside environment did not affect to the measurements of the groups. the results wereprocessed by statistical statgraphics plus 5.0.keywords: chickens variables, replacement of laying hens, open and free environment, measurement