Table 1.
Summary of data from studies used in development and evaluation of the model
| Measure | Development data (n = 187)1 | Evaluation data (n = 121)2 | ||||
|---|---|---|---|---|---|---|
| Mean | SD | Range | Mean | SD | Range | |
| Initial age, m | 7.63 | 0.91 | 6.7 to 8.5 | 5.43 | 2.09 | 2.9 to 11.0 |
| SRW, kg | 70 | 0 | 70 to 70 | 76.2 | 6.98 | 70 to 100 |
| MEI, MJ/d | 11.8 | 4.03 | 4.9 to 22.8 | 12.3 | 3.04 | 5.0 to 15.3 |
| M/D, MJ/kg DM | 9.87 | 1.25 | 7.7 to 12.7 | 10.9 | 0.53 | 8.5 to 11.3 |
| DOF, d | 89 | 5.1 | 75 to 99 | 63 | 15.4 | 36 to 207 |
| Initial LWT, kg | 38.7 | 8.97 | 24.3 to 58.0 | 34.7 | 6.27 | 20.0 to 51.0 |
| Initial %EBF | 24.4% | 3.51% | 19.5% to 33.2% | 16.1% | 3.43% | 8.2% to 25.4% |
| Final LWT, kg | 49.7 | 7.49 | 31.1 to 69.8 | 42.3 | 7.49 | 25.0 to 60.5 |
| Final %EBF | 26.7% | 4.57% | 15.4% to 36.7% | 22.9% | 4.66% | 11.4% to 31.7% |
| CWG, g/d clean | 7.4 | 1.98 | 3.6 to 13.1 | 9.3 | 1.24 | 5.3 to 9.9 |
| ADG of FFEB, kg/d | 0.11 | 0.07 | −0.05 to 0.29 | 0.11 | 0.07 | −0.07 to 0.24 |
| RE in FFEB, MJ/d | 1.80 | 1.51 | −1.95 to 5.49 | 6.50 | 2.88 | −0.31 to 11.4 |
Notes: Values shown are mean, standard deviation (SD) and range of traits.
ADG of FFEB, average daily gain of fleece free empty body; CWG, clean wool growth; DOF, days on feed; EBF, empty body fat as % Empty BW; LWT, liveweight; M/D, metabolizable energy density of the feed offered; MEI, metabolizable energy intake; RE in FFEB, energy retained in FFEB.
1Individual lamb data from the final (experimental) phases of Hegarty et al. (1999) and Dougherty et al. (2022a);
2Individual lamb data from Keogh et al. (2023), and the preliminary phase of Dougherty et al. (2022a) and treatment means from Turgeon et al. (1986).