Data from: African departure rather than migration speed determines variation in spring arrival in pied flycatchers
| Main Authors: | Ouwehand, Janne, Both, Christiaan |
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| Format: | info dataset Journal |
| Terbitan: |
, 2017
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4950732 |
Daftar Isi:
- Properly timed spring migration enhances reproduction and survival. Climate change requires organisms to respond to changes such as advanced spring phenology. Pied flycatchers Ficedula hypoleuca have become a model species to study such phenological adaptations of long-distance migratory songbirds to climate change, but data on individuals' time schedules outside the breeding season are still lacking. Using light-level geolocators, we studied variation in migration schedules across the year in a pied flycatcher population in the Netherlands, which sheds light on the ability for individual adjustments in spring arrival timing to track environmental changes at their breeding grounds. We show that variation in arrival dates to breeding sites in 2014 was caused by variation in departure date from sub-Saharan Africa and not by environmental conditions encountered en route. Spring migration duration was short for all individuals, on average 2 weeks. Males migrated ahead of females in spring, while migration schedules in autumn were flexibly adjusted according to breeding duties. Individuals were therefore not consistently early or late throughout the year. In fast migrants like our Dutch pied flycatchers, advancement of arrival to climate change likely requires changes in spring departure dates. Adaptation for earlier arrival may be slowed down by harsh circumstances in winter, or years with high costs associated with early migration.
- return_in_2014Observed local return in 2014 of pied flycatchers with and without geolocator devices in 2013, based on field observations and catches. This file is used to study potential effects of geolocator deployment and harness types on the survival of pied flycatchers, compared to birds without these devices.timing_in 2013-2014Timing of breeding arrival dates (in males and females) and first egg laying dates (females) in 2013 and 2014 in Drenthe (The Netherlands), as shown for pied flycatchers deployed with geolocator devices in 2013 or without such devices. Arrival and egg laying are based on field observations. This file is used to study potential effects of geolocator deployment and harness types on the timing of arrival and egg laying of pied flycatchers, compared to birds without these devices. Timing is expressed as days relative to the sex-specific annual mean of the population.transitionsContains raw data on sunset and sunrise times (so called 'transitions') used to estimate longitude, movement and stationary periods. The file shows data of 27 solar geolocator-loggers deployed on pied flycatchers, Ficedula hypoleuca, in Drenthe The Netherlands (Longitude: 6.378, Latitude: 52.820) in 2013, using Intigeo-W50 made by Migrate Technology Ltd logger. Data was processed using the program BASTrack.