Table 1.
Average body mass, lean body mass, absolute and relative arrival fuel load
| Season | Sex | Age | n | Body mass (g) | Lean body mass (g) | Absolute fuel load (g) | Arrival fuel load (rel.) |
|---|---|---|---|---|---|---|---|
| Autumn | Male | First-years | 212 | 98.1 (96.9–99.3) | 90.61 (89.85–91.40) | 7.47 (6.62–8.30) | 0.082 (0.073–0.091) |
| Adults | 219 | 105.7 (104.5–106.9) | 93.26 (92.45–94.01) | 12.45 (11.59–13.25) | 0.134 (0.124–0.145) | ||
| Female | First-years | 249 | 95.6 (94.5–96.7) | 87.83 (87.13–88.56) | 7.73 (6.94–8.50) | 0.088 (0.080–0.096) | |
| Adults | 239 | 100.4 (99.2–101.5) | 89.98 (89.24–90.70) | 10.36 (9.56–11.14) | 0.115 (0.106–0.125) | ||
| Spring | Male | Adults | 200 | 102.8 (101.5–104.0) | 91.65 (90.82–92.43) | 11.12 (10.19–11.97) | 0.121 (0.111–0.132) |
| Female | Adults | 193 | 95.0 (93.7–96.3) | 86.79 (85.98–87.65) | 8.22 (7.35–9.18) | 0.095 (0.085–0.104) |
Data are given for all migrating blackbirds (n = 1312), broken down by sex, age and season. For each group, sample size (n), mean values and 95% credible intervals (2.5% and 97.5%) are reported