Table 3.
Multiple regression coefficients of selected models used for estimating energy1 contained in the empty body or carcass of beef cows
| Independent variables2 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model | Type | β0 | BW | BFc | BFm | BFm2 | HH | WH | WT:HH | BCS | EBW | R 2 |
| Ferrell and Jenkins (1984, 1) | Empty Body | 73.3 | 2.9 | 422.0 | -2.7 | 0.87 | ||||||
| Ferrell and Jenkins (1984, 2) | Empty Body | -333.0 | 4.6 | 0.69 | ||||||||
| Gresham et al. (1986) | Carcass | -733.7 | 1.8 | 77.7 | -1.8 | 2.5 | 0.87 | |||||
| Wagner et al. (1988, 1) | Carcass | -487.2 | 1.3 | 78.4 | 0.90 | |||||||
| Wagner et al. (1988, 2) | Carcass | -661.5 | 2.7 | 0.81 | ||||||||
| Wagner et al. (1988, 3) | Carcass | -756.7 | 361.5 | 0.83 | ||||||||
| Wagner et al. (1988, 4) | Carcass | -221.5 | 128.2 | 0.85 |
1Mcal.
2BW = live body weight (kg); BFc = back fat (cm); BFm = back fat (mm); HH = hip height (cm); WH = wither height (cm, estimated as HH − 5); BCS = body condition score (1 to 9 scale, 1 = emaciated and 9 = very obese); WT:HH = ratio of WT:HH, kg:cm; EBW = empty body weight (kg).