Table 1.
The proportion of focal godwits foraging on Scrobicularia plana or Hediste diversicolor in flocks at 18 sites across the Tagus estuary. Sites are ordered according to the proportion of godwits foraging on bivalves. See Fig. 1 for site locations. N indicates number of flocks sampled
| Site | Diet of flocks | ||||
|---|---|---|---|---|---|
| S. plana | H. diversicolor | N | |||
| Mean | SE | Mean | SE | ||
| 12 | 100.0 | 0.0 | 0.0 | 0.0 | 4 |
| 15 | 100.0 | 0.0 | 0.0 | 0.0 | 6 |
| 16 | 100.0 | 0.0 | 0.0 | 0.0 | 1 |
| 17 | 100.0 | 0.0 | 0.0 | 0.0 | 3 |
| 11 | 96.4 | 3.6 | 0.0 | 0.0 | 5 |
| 18 | 96.2 | 1.8 | 3.3 | 1.5 | 7 |
| 13 | 94.8 | 1.7 | 3.4 | 3.4 | 2 |
| 9 | 92.0 | 8.0 | 1.0 | 1.0 | 4 |
| 14 | 82.7 | 4.6 | 4.1 | 3.6 | 14 |
| 10 | 67.2 | 8.6 | 28.9 | 10.6 | 3 |
| 4 | 61.8 | 15.8 | 21.5 | 16.5 | 3 |
| 5 | 38.1 | 17.6 | 60.8 | 18.0 | 3 |
| 1 | 37.5 | 13.9 | 45.6 | 11.5 | 6 |
| 8 | 31.4 | 14.9 | 67.6 | 15.5 | 7 |
| 3 | 24.9 | 5.4 | 65.0 | 7.7 | 7 |
| 2 | 13.4 | 8.3 | 86.6 | 8.3 | 3 |
| 6 | 3.6 | 2.2 | 93.6 | 2.8 | 12 |
| 7 | 2.1 | 1.7 | 96.1 | 1.9 | 8 |