Aerobic capacity | Resting metabolic rate (RMRmin) | Maximal metabolic rate (MMR) | Time to exhaustion |
---|
t | p | t | p | t | p |
---|
Intercept | −39.85 | < 0.001 | −14.95 | < 0.001 | −0.36 | 0.72 |
migration strategy | 0.15 | 0.88 | −0.14 | 0.88 | −3.32 | 0.001* |
w/i SD | 4.27 | < 0.001* | 2.02 | 0.05* | −0.08 | 0.93 |
w/i LD | −3.26 | 0.001* | 1.69 | 0.09 | −1.50 | 0.14 |
sex | 2.78 | 0.006* | −0.43 | 0.67 | −2.16 | 0.03* |
infection | 0.01 | 0.99 | 2.47 | 0.01* | 1.07 | 0.28 |
haemoglobin | −0.24 | 0.81 | 2.87 | 0.004* | 3.07 | 0.002* |
F (df) | 6.54 (6176) | < 0.001* | 2.97 (6240) | 0.008* | 7.15 (6241) | < 0.001* |
- Legend: Aerobic capacity estimates are the mass-specific resting and maximal metabolic rates (oxygen consumption rates, ml g−1 min−1), and the endurance exercise given as time to exhaustion (min). Migration strategy provides the comparison between long-distance (LD) and short-distance migration (SD), whereas w/i SD and w/i LD give the comparison between species within each migration strategy. Factors sex, infection, and the covariate haemoglobin test for differences between males and females, between non-infected and haemosporidian-infected birds as well as for the potential dependency with total haemoglobin in peripheral blood. F, df, t and p-values are the accompanying statistical model parameters, * indicates statistically significant differences at p ≤ 0.05 (for details see Methods)