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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