Table 4.
Geometrical properties of tibia of 16 wk pullets housed in AV system and CCs.1
| Dependent variable | Housing | ||
|---|---|---|---|
| AV | CC | P value | |
| Geometrical properties | |||
| Area (mm2) | 14.16 ± 0.112 | 12.52 ± 0.12 | <.0001 |
| Medial thickness (mm) | 0.90 ± 0.01 | 0.78 ± 0.01 | <.0001 |
| Lateral thickness (mm) | 0.88 ± 0.01 | 0.78 ± 0.01 | <.0001 |
| Anterior thickness (mm) | 0.80 ± 0.01 | 0.70 ± 0.01 | <.0001 |
| Posterior thickness (mm) | 0.80 ± 0.01 | 0.70 ± 0.01 | <.0001 |
| Average medio-lateral thickness (mm) | 0.89 ± 0.01 | 0.78 ± 0.01 | <.0001 |
| Average antero-posterior thickness (mm) | 0.80 ± 0.01 | 0.70 ± 0.01 | <.0001 |
| Average thickness (mm) | 0.84 ± 0.01 | 0.74 ± 0.01 | <.0001 |
| Proximal medio-lateral diameter (mm) | 6.73 ± 0.03 | 6.69 ± 0.03 | 0.3825 |
| Middle medio-lateral diameter (mm) | 6.44 ± 0.03 | 6.37 ± 0.03 | 0.1121 |
| Distal medio-lateral diameter (mm) | 6.81 ± 0.03 | 6.73 ± 0.03 | 0.0912 |
| Prox antero-posterior diameter (mm) | 6.07 ± 0.03 | 5.94 ± 0.03 | 0.0029 |
| Middle antero-posterior diameter (mm) | 5.57 ± 0.02 | 5.51 ± 0.03 | 0.1252 |
| Distal antero-posterior diameter (mm) | 5.67 ± 0.03 | 5.67 ± 0.03 | 0.9947 |
| Average medio-lateral diameter (mm) | 6.66 ± 0.03 | 6.60 ± 0.03 | 0.1125 |
| Average antero-posterior diameter (mm) | 5.77 ± 0.02 | 5.71 ± 0.02 | 0.0831 |
| Average diameter (mm) | 6.21 ± 0.02 | 6.15 ± 0.02 | 0.0585 |
1
AV = aviary system; CC = conventional cages.
2
Values are presented as least-squares mean ± standard error of the mean.