Migrations of Baltic Dunlin (data from Pakanen et al. 2018)-light levels

Pakanen V, Jaakkonen T, Saarinen J, Rönkä N, Thomson RL, Koivula K. Migrations of Baltic Dunlin (data from Pakanen et al. 2018)-light levels. Movebank Data Repository. https://doi.org/10.5441/001/1.1rr405mg/2
Migration during spring is usually faster than during autumn because of competition for breeding territories. In some cases, however, the costs and benefits associated with the environment can lead to slower spring migration, but examples are quite rare. We compared seasonal migration strategies of the endangered Baltic population of the dunlin (Calidris alpina schinzii) using light-level geolocator data from 26 individuals breeding in Finland. Autumn migration was faster, with individuals showing a “jump” and “skipping” migration strategy characterised by fewer stationary periods, shorter total stopping time and faster flight. Spring migration was slower, with individuals using a “skipping” strategy. The duration of migration was longer for early departing birds during spring but not during autumn suggesting that early spring migrants are prevented from arriving to the breeding areas or that fueling conditions are worse on the stopover sites for early arriving individuals. Dunlins showed high migratory connectivity. All individuals had one long staging at the Wadden Sea in the autumn after which half of the individuals flew 4500 km non-stop to Banc d'Arguin, Mauritania. The other half stopped briefly on the Atlantic coast on their way to Mauritania. One bird wintered on the coast of Portugal. Nine individuals that carried geolocators for two years were site faithful to their final non-breeding sites. Based on the strategies during the non-breeding period we identified, Baltic dunlin may be especially vulnerable to rapid environmental changes at the staging and non-breeding areas. Consequently, the preservation of the identified non-breeding areas is important for their conservation.
animal movement,animal tracking,avian migration,Calidris alpina,Calidris alpina schinzii,dunlin,East Atlantic Flyway,geolocators,light-level loggers,migratory connectivity,southern dunlin,Wadden Sea,wintering site fidelity
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DOIs of related Publications
  title = {Migrations of Baltic Dunlin (data from Pakanen et al. 2018)-light levels},
  author = {Pakanen, V and Jaakkonen, T and Saarinen, J and Rönkä, N and Thomson, RL and Koivula, K},
  URL = {http://dx.doi.org/10.5441/001/1.1rr405mg/2},
  doi = {doi:10.5441/001/1.1rr405mg/2},
  publisher = {Movebank data repository}
ID  - doi:10.5441/001/1.1rr405mg/2
T1  - Migrations of Baltic Dunlin (data from Pakanen et al. 2018)-light levels
AU  - Pakanen, Veli-Matti
AU  - Jaakkonen, Tuomo
AU  - Saarinen, Joni
AU  - Rönkä, Nelli
AU  - Thomson, Robert L.
AU  - Koivula, Kari
KW  - animal movement
KW  - animal tracking
KW  - avian migration
KW  - Calidris alpina
KW  - Calidris alpina schinzii
KW  - dunlin
KW  - East Atlantic Flyway
KW  - geolocators
KW  - light-level loggers
KW  - migratory connectivity
KW  - southern dunlin
KW  - Wadden Sea
KW  - wintering site fidelity
KW  - Calidris alpina
PB  - Movebank data repository
UR  - http://dx.doi.org/10.5441/001/1.1rr405mg/2
DO  - doi:10.5441/001/1.1rr405mg/2
ER  -