Performance Description of Afshari Sheep with focus on Growth and Daily Gain Potential in Male Lambs: A Meta-Analysis | ||
| علوم و فنون دامپروری | ||
| Volume 9, Issue 35, September 2020, Pages 33-48 PDF (1.56 M) | ||
| Document Type: Extension achievements | ||
| DOI: 10.22092/aasrj.2019.125177.1174 | ||
| Authors | ||
| Seyed Hadi Ebrahimi* 1; Fahimeh Varasteh2; Ali Javadmanesh3 | ||
| 1Department of Animal Sciences Faculty of Agriculture Ferdowsi University Of Mashhad (FUM) | ||
| 2Seyed Hadi Ebrahimi Assistant Professor Department of Animal Sciences Faculty of Agriculture Ferdowsi University Of Mashhad (FUM) | ||
| 3Assistant Professor Department of Animal Sciences Faculty of Agriculture Ferdowsi University Of Mashhad (FUM) | ||
| Abstract | ||
| This study was aimed to determine reliable daily gains in Afshari male lambs under fattening regime using a meta-analysis. Total of 37 finishing parameters means that were documented in 16 research papers from 1984 to 2018 were taken and used for this study. Average daily gain ranged from 67.7 to 479 g/d in different studies with mean and standard deviation of 238.24 and 96.39 g/d, respectively. Feed conversion coefficient had a mean of 7.32 ± 3.55 and varied from 3.65 to 21.46 in the reviewed papers. Random effects model of meta-regression of body weight on initial body weight had a significant intercept of 216.60 g/d which can be assumed as an assured base level of daily gain in Afshari male lambs during finishing period however meta-regression coefficient was not significant that indicated for guaranteeing greater daily gains, epigenetic effects such as dam nutrition level during pregnancy, liquid feed patterns, weaning age and protocol, age of entering to fattening period and existing or absence of compensatory growth within fattening period must be cared. In general, using standard operation process in sheep production systems can lead to a greater and more consistency daily gains close to what has been predicated in the feeding standards. | ||
| Keywords | ||
| Fattening variations; growth curve; growth epigenetics; Afshari sheep | ||
| References | ||
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