Table 1 Global categorized location of satellite transmitter discontinuation of birds of the eight treatment groups.
From: True navigation in migrating gulls requires intact olfactory nerves
Treatment group | Local within release site (<100 km) | During migration southward (>100 km) | On non-breeding grounds (Egypt or Africa) | % discontinuation of transmitters on non-breeding grounds | Total |
|---|---|---|---|---|---|
Finland control | 9 | 10 | 15 | 44% | 34 |
Heligoland control | 1 | 8 | 3 | 25% | 12 |
Heligoland OlfNs | 1 | 6 | 5 | 42% | 12 |
Heligoland TriNs | 0 | 8 | 3 | 27% | 11 |
Russia control | 9 | 3 | 8 | 40% | 20 |
Kazan control | 3 | 1 | 6 | 60% | 10 |
Kazan OlfNs | 5 | 0 | 6 | 54% | 11 |
Kazan TriNs | 2 | 1 | 3 | 50% | 6 |
Total | 30 | 37 | 49 | 116 |
