The effect of body condition score on some blood biological parameters and reproduction performance of Fat tail Afshari Sheep
Subject Areas : Journal of Large Animal Clinical Science Research(JLACSR)
Keywords: body condition score, Afshari ewes, Some Blood biological parameters, Reproduction performance,
Abstract :
The effect of body condition score (BCS) and body weight of fat tail Afshari sheep at mating time on reproductive performance were studied . Total 162 fat tail Afshari ewes (3-7 years old) randomly selected from animal unit of Zanjan University. Ewes divided to 4 treatments groups according BCS (2, 2.5, 3, 3.5 and more). The reproductive parameters such as lambs born to ewes after mating, number of lambs born per lambing, Kg lambs born per ewe mating, pregnancy period , lambs birth weight, and some blood metabolites such as glucose, total protein, albumin and globulin were determined. The result of this study indicated that BCS had a significant effect (P<0.05) on the lambs born per ewe at mating. Ewes with BCS =3 had a better performance in lambing rate and Kg lambs born per ewe. While the lambing rate reduced in ewes with BCS of 3.5 or more. Ewes with BCS=3 had more (P<0.05) normal estrous while ewes with low BCS had shorter estrous period. Birth weight of lambs was significantly affected by body weight of their dams (P<0.01) but BCS had no significant effect on lambs’ weight at birth and weaning. There was significant effect of BCS on plasma FSH concentration in ewes with BCS more than 3 but no significant differences was seen in blood metabolite parameters in this study. It is concluded that BCS had significant effect on lambing rate and lambs born per ewe (P<0.05). The BCS of 3 at mating time could optimize profitability of Afshari ewes.
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