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Table 1 Average body mass, lean body mass, absolute and relative arrival fuel load

From: Days to visit an offshore island: effect of weather conditions on arrival fuel load and potential flight range for common blackbirds Turdus merula migrating over the North Sea

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)
  1. 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