AU - Zahmatkesh, reza AU - Hafezian, seyed Hasan TI - Estimation of Economic Coefficients of Some Major Production Traits PT - JOURNAL ARTICLE TA - rap JN - rap VO - 1 VI - 1 IP - 1 4099 - http://rap.sanru.ac.ir/article-1-156-en.html 4100 - http://rap.sanru.ac.ir/article-1-156-en.pdf SO - rap 1 ABĀ  - 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. CP - IRAN IN - College of Animal Science and Fisheries, Sari Agricultural Science and Natural Resources University LG - eng PB - rap PG - 42 PT - Research YR - 2010