%0 Journal Article %A Zahmatkesh, reza %A Hafezian, seyed Hasan %T Estimation of Economic Coefficients of Some Major Production Traits %J Research on Animal Production %V 1 %N 1 %U http://rap.sanru.ac.ir/article-1-156-en.html %R %D 2010 %K Economic coefficients, Bio-Economic model, Karakul sheep, %X In this study, the economic coefficient of 10 traits including birth weight, 3-month weight, 6-month weight, 12-month weight, survival before 3-month, survival before 6-month, ewe survival, cumulative survival, twining percentage and fertility percentage were investigated in four different production systems with mean number 250 ewe of karakul by bio-economic model in Fars province. The obtained results showed that 6-month weight had the highest importance among the above traits. 3-month weight, cumulative survival, twining and fertility rate, ewe survival, birth weight, survival before 3-month, survival before 12- month, survival before 6-month, had positive coefficients and 12-month weight, had negative coefficients in the following ranking. %> http://rap.sanru.ac.ir/article-1-156-en.pdf %P 42-54 %& 42 %! %9 Research %L A-10-1-44 %+ College of Animal Science and Fisheries, Sari Agricultural Science and Natural Resources University %G eng %@ 2251-8622 %[ 2010