Table 1.
Haematological and eggshell colour differences between treatment groups, pre- and post-treatment
| Trait | N | F | Df | P | PHZ | Control | Additional terms in model |
|---|---|---|---|---|---|---|---|
| Pre-treatment Hct (%) | 29 | 1.09 | 1,27 | 0.31 | 50.8 ± 1.1 | 49.2 ± 1.0 | |
| Pre-treatment Hb (g/dl) | 26 | 0.52 | 1,24 | 0.48 | 14.5 ± 0.6 | 13.9 ± 0.5 | |
| Pre-treatment mean BGC | 29 | 1.70 | 1,27 | 0.20 | 0.473 ± 0.003 | 0.478 ± 0.002 | |
| Post-treatment Hct (%) | 29 | 0.03 | 1,26 | 0.86 | 51.2 ± 1.1 | 51.5 ± 1.0 | Pre-treatment Hct, F1,26 = 3.43, P = 0.08 |
| Post-treatment Hb (g/dl) | 26 | 6.89 | 1,23 | 0.015 | 17.3 ± 0.5 | 15.6 ± 0.4 | Pre-treatment Hb, F1,23 = 7.17, P = 0.013 |
| Post-treatment mean BGC | 28 | 0.96 | 1,25 | 0.34 | 0.470 ± 0.002 | 0.468 ± 0.002 | Pre-treatment BGC, F1,25 = 14.47, P = 0.0008 |
| BGC of first egg of replacement clutch | 20 | 0.01 | 1,17 | 0.92 | 0.467 ± 0.002 | 0.467 ± 0.002 | Pre-treatment BGC, F1,17 = 17.44, P = 0.0006 |
Means are least-squares means ± standard errors from general linear models.For post-treatment traits, including laying interval in the model yielded similar results (Additional file 2: Table S2)