Effects of body condition score before mating on reproductive performance of Lori-Bakhtiari ewe | ||
| علوم و فنون دامپروری | ||
| Article 8, Volume 5, Issue 18, June 2016, Pages 63-68 PDF (749.69 K) | ||
| DOI: 10.22092/aasrj.2016.107077 | ||
| Author | ||
| MOHSEN BAGHERI* | ||
| chaharmahal and bakhtiari agricultural and natural resources researches and education | ||
| Abstract | ||
| The aim of this study was to determine effects of body condition score (BCS) before mating on reproductive performance of Lori-Bakhtiari ewes. For this purpose, one day before ram introduced, body condition score of 300 Lori-Bakhtiari ewes reared in rural flock were assessed. Conception rate, number of lambs born and litter size were recorded. The results showed that, the highest relative frequency (37%) being observed for ewes with a BCS of 3.5. Conception rate and conception ratio were affected by BCS (p<0.05). Conception rate was higher for ewes with a BCS of 3 to 4, but, the differences between ewes with a BCS of 3, 3.5 and 4 were not significant (p>0.05). Number of lambs born per ewe exposed was higher for ewes with a BCS of 4, but differences between that and ewes with a BCS of 3 and 3.5 were not significant. The lowest conception rate and number of lambs born were observed for ewes with a BCS of 2 (p<0.05). Litter size was not significantly difference between ewes with BCS 2.5-4, but, numerically was higher for BCS of 4 and 3.5, respectively. Therefore, because of possibility being fat for ewes with a BCS of 4 and reach to BCS of 4.5 and thereafter vehement loss in reproductive performance, the best BCS of Lori-Bakhtiari ewes immediately before mating was proposed 3-3.5. | ||
| Keywords | ||
| ewe; Body condition score; performance; Reproduction | ||
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