TY - JOUR JF - rap JO - rap VL - 1 IS - 1 PY - 2010 Y1 - 2010/5/01 TI - Estimation of Economic Coefficients of Some Major Production Traits TT - برآورد ضرایب اقتصادی برخی صفات مهم گوسفند قره گل در استان فارس N2 - 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. SP - 42 EP - 54 AU - Zahmatkesh, reza AU - Hafezian, seyed Hasan AD - College of Animal Science and Fisheries, Sari Agricultural Science and Natural Resources University KW - Economic coefficients KW - Bio-Economic model KW - Karakul sheep UR - http://rap.sanru.ac.ir/article-1-156-en.html ER -