Table 1.
Bird groups summary (mean ± s.d.). Body condition index (juveniles only) at departure was defined as the residuals of a regression of body mass on the first axis of a principal component analysis between length of the beak and the flipper.
| bird group | sample size | equipment date (±days) | monitoring duration (days) | weight at departure (kg) | body condition index |
|---|---|---|---|---|---|
| adults non-breeder | 5 | (1) 13 Mar 2014 (4) 23 Feb 2015 ± 3 |
232 ± 9 (96 ± 20)a | 10.3 ± 1.8 | — |
| juveniles ‘surviving’ | 12 | (7) 14 Dec 2013 ± 14 (5) 6 Dec 2014 |
252 ± 34 (127 ± 28)a | 8.8 ± 0.5 | −0.02 ± 0.50 |
| juveniles ‘early dead’ | 5 | (4) 20 Dec 2013 ± 5 (1) 6 Dec 2014 |
89 ± 17 (48 ± 6)a | 9.0 ± 1.2 | 0.04 ± 1.11 |
aCumulated number of transmission days.