Table 1.
Flight variables measured for 13 female common eiders during 175±17 days from reproduction to winter period (excluding moult and migration periods): mean time spent flying per day (TSF, min d−1), mean duration per flight (FD, min), mean number of flights per day (NF, d−1), mean daily heart rate (DHR, beats min−1; see §2) and mean non-flight heart rate excluding migrations (NFHR, beats min−1; see §2). Values are means±s.d. We observed any correlation at the inter-individual level between DHR and TSF (r=0.149, p=0.616) and between DHR and NF (r=0.399, p=0.178) and, between DHR and FD (r=− 0.526, p=0.069).
| individual | number of days | TSF (min d−1) | NF (d−1) | FD (min) | DHR (beats min−1) | NFHR (beats min−1) |
|---|---|---|---|---|---|---|
| BR | 164 | 12.8±12.6 | 4.7±3.5 | 2.7±2.6 | 159±31 | 158±31 |
| OO | 175 | 13.9±12.8 | 7.0±6.0 | 2.0±1.7 | 167±32 | 165±31 |
| OR | 171 | 9.3±11.1 | 3.2±3.5 | 2.9±2.4 | 136±13 | 135±13 |
| OY | 167 | 6.0±9.7 | 3.0±3.0 | 1.9±1.8 | 154±17 | 153±18 |
| RB | 217 | 5.5±9.3 | 2.5±3.6 | 2.2±2.0 | 139±25 | 138±25 |
| RR | 183 | 10.3±10.8 | 5.8±4.6 | 1.8±2.0 | 151±19 | 150±19 |
| RW | 164 | 11.1±10.5 | 3.9±3.2 | 2.9±2.4 | 127±14 | 126±14 |
| WB | 182 | 9.9±11.0 | 3.9±3.4 | 2.5±2.3 | 137±12 | 135±12 |
| WO | 189 | 11.7±11.2 | 5.2±4.6 | 2.2±2.1 | 180±29 | 179±29 |
| YB | 186 | 6.8±10.8 | 3.2±3.5 | 2.1±2.3 | 173±25 | 172±26 |
| YR | 176 | 10.0±11.3 | 4.0±3.2 | 2.5±2.4 | 116±11 | 115±12 |
| YW | 168 | 7.9±8.8 | 3.8±3.7 | 2.1±1.8 | 159±27 | 158±27 |
| YY | 185 | 7.7±10.2 | 3.1±3.4 | 2.4±2.8 | 140±21 | 139±20 |
| mean±s.e.m. | 179±14 | 9.6±2.6 | 4.1±1.3 | 2.3±0.4 | 149±19 | 148±18 |