Table 4 Regressions of time and energy investment proxies, averaged per individual over a chick-rearing period, against the overall proportion of trips recorded at sea
From: Time and energy costs of different foraging choices in an avian generalist species
Dependent variable | Factor | Estimated marginal mean or coefficient ± s.e. | Statistic | P |
|---|---|---|---|---|
Avg. N trips per day | Intercept | 1.73 ± 0.08 |  |  |
Proportion of marine trips | −0.12 ± 0.20 | F (1, 66)= 0.4 | 0.54 | |
Avg. trip duration (h) | Intercept | 4.47 ± 0.2 |  |  |
Proportion of marine trips | −1.3 ± 0.5 | F (1, 66)= 6.8 | 0.01 | |
Avg. of summed daily ODBA (g) | Intercept | 10.48 ± 0.53 |  |  |
Proportion of marine trips | 1.67 ± 1.88 | F (1, 31)= 0.8 | 0.38 | |
Time away from the colony (h) | Intercept | 11.07 ± 0.53 |  |  |
Proportion of marine trips | −3.05 ± 1.5 | F (1, 51)= 4.2 | 0.046 |