Satellite tracking of the migratory pathways of the first-year Lesser Black-backed Gulls Larus fuscus departing from the breeding grounds of different subspecies
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The migratory behaviour of two Lesser Black-backed Gull Larus fuscus subspecies, fuscus and intermedius, was studied using satellite telemetry. To this end, first-year birds were equipped with satellite transmitters and released either at their natal site, or after transferring to a breeding site of the other subspecies. In addition, first-year birds from cross-breeding experiments between the two subspecies (fuscus x intermedius) were also equipped with satellite transmitters. In total, eleven first-year birds were successfully tracked during their initial autumn migration, at least one from each study group. First-year birds from the Danish intermedius subspecies migrated either southwest along the coast of the North Sea or through central Europe to Algeria. By contrast, first-year birds from the Finnish fuscus subspecies migrated on a south-southeastern course towards Ukraine and the Bosporus, Turkey. Only one of the transferred gulls could be tracked long enough to accurately determine the migratory behaviour: this bird from the intermedius subspecies left Finland on a south-southeasterly course towards the Ukraine, where transmission ceased. Thus, this gull resembled the migratory behaviour of the fuscus subspecies. One bird from the cross-breeding experiments wintered in Libya, but the migratory behaviour remained unknown due to the lack of positional data. |
Original language | English |
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Journal | Vogelwelt |
Volume | 128 |
Issue number | 3 |
Pages (from-to) | 141-148 |
Number of pages | 8 |
ISSN | 0042-7993 |
Publication status | Published - 2007 |
Bibliographical note
Key words: Lesser Black-backed Gull Larus fuscus, satellite telemetry, migratory direction of
subspecies.
ID: 4979845