Table 3.
Models explaining variation in tetanus response in song sparrows. (Nt, Nf and Nm are the total sample sizes of naive individuals, females and males included in final models. There was insufficient variance to include age as an explanatory variable in 2005 (table 1). Variables retained in final models are indicated in bold. Age×f, year×f and year×sex×f interactions were not significant (p>0.35).)
| year | Nt | Nf | Nm | individual f | inter-sample period | inter-sample period2 | age | body condition | maternal f | paternal f | sex | sex×f | maternal vaccination history | year | final model |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2004 | 38 | 18 | 20 | F=9.9 | F=7.0 | F=5.0 | F=2.4 | F=0.2 | F=0.01 | F=0.2 | F=5.5 | F=4.9 | — | — | F5,37=5.2 |
| p=0.003 | p=0.013 | p=0.033 | p=0.13 | p=0.66 | p=0.96 | p=0.62 | p=0.025 | p=0.033 | p=0.001 | ||||||
| Bf=−7.8 (−13.7–−2.0) | R2=0.36 | ||||||||||||||
| Bm=−1.5 (−5.0–2.1) | |||||||||||||||
| B=−3.8 (−6.8–−0.7) | |||||||||||||||
| η2=0.24 | |||||||||||||||
| 2005 | 47 | 27 | 20 | F=0.5 | F=6.1 | F=5.9 | — | F=0.01 | F=0.10 | F=3.5 | F=3.3 | F=4.4 | F=7.8 | — | F7,46=5.5 |
| p=0.49 | p=0.018 | p=0.020 | p=0.93 | p=0.77 | p=0.071 | p=0.076 | p=0.044 | p=0.008 | p<0.001 | ||||||
| Bf=−7.2 (−14.9–−0.3) | R2=0.41 | ||||||||||||||
| Bm=3.8 (−5.3–12.9) | |||||||||||||||
| B=−4.7 (−8.8–−0.5) | |||||||||||||||
| η2=0.12 | |||||||||||||||
| all data | 85 | 45 | 40 | F=14.9 | F=11.1 | F=8.8 | F=2.4 | F=1.1 | F=0.2 | F=2.8 | F=4.8 | F=7.5 | F=11.4 | F=37.2 | F8,84=20.8 |
| p<0.001 | p=0.001 | p=0.004 | p=0.13 | p=0.29 | p=0.67 | p=0.10 | p=0.031 | p=0.008 | p=0.001 | p<0.001 | p<0.001 | ||||
| Bf=−7.7 (−12.4–−3.0) | R2=0.65 | ||||||||||||||
| Bm=−1.1 (−4.5–2.3) | |||||||||||||||
| B=−4.5 (−7.1–−2.2) | |||||||||||||||
| η2=0.16 |