Data from: Sex-specific difference in migration schedule as a precursor of protandry in a long-distance migratory bird

Citation
Pedersen L, Nina Munkholt J, Strandberg R, Thorup K, Tøttrup AP. 2019. Data from: Sex-specific difference in migration schedule as a precursor of protandry in a long-distance migratory bird. Movebank Data Repository. https://doi.org/10.5441/001/1.j71640kh
Abstract
NOTE: An updated and larger version of this dataset is available. See https://doi.org/10.5441/001/1.4bt7365c. ABSTRACT: Protandry, the earlier arrival of males at the breeding grounds relative to females, is common in migratory birds. However, due to difficulties in following individual birds on migration, we still lack knowledge about the spatiotemporal origin of protandry during the annual cycle, impeding our understanding of the proximate drivers of this phenomenon. Here, we use full annual cycle tracking data of red-backed shrikes Lanius collurio to investigate the occurrence of sex-related differences in migratory pattern, which could be viewed as precursors (proximate causes) to protandry. We find protandry with males arriving an estimated 8.3 days (SE = 4.1) earlier at the breeding area than females. Furthermore, we find that, averaged across all departure and arrival events throughout the annual cycle, males migrate an estimated 5.3 days earlier than females during spring compared to 0.01 days in autumn. Event-wise estimates suggest that a divergence between male and female migratory schedules is initiated at departure from the main non-breeding area, thousands of kilometres from, and several months prior to arrival at the breeding area. Duration of migration, flight speed during migration and spatial locations of stationary sites were similar between sexes. Our results reveal that protandry might arise from sex-differential migratory schedules emerging at the departure from the main non-breeding area in southern Africa and retained throughout spring migration, supporting the view that sex-differential selection pressure operates during spring migration rather than autumn migration.
Keywords
Lanius collurio,animal movement,animal tracking,avian migration,geolocator,Lanius collurio,light-level logger,protandry,red-backed shrike,Scandinavia,songbirds
Taxa
Taxon
Lanius collurio
Red-backed Shrike
Sensors
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DOIs of related Publications
BibTex
@misc{001/1_j71640kh,
  title = {Data from: Sex-specific difference in migration schedule as a precursor of protandry in a long-distance migratory bird},
  author = {Pedersen, L and Nina, Munkholt, J and Strandberg, R and Thorup, K and Tøttrup, AP},
  year = {2019},
  URL = {http://dx.doi.org/10.5441/001/1.j71640kh},
  doi = {doi:10.5441/001/1.j71640kh},
  publisher = {Movebank data repository}
}
RIS
TY  - DATA
ID  - doi:10.5441/001/1.j71640kh
T1  - Data from: Sex-specific difference in migration schedule as a precursor of protandry in a long-distance migratory bird
AU  - Pedersen, Lykke
AU  - Nina Munkholt, Jakobsen
AU  - Strandberg, Roine
AU  - Thorup, Kasper
AU  - Tøttrup, Anders P.
Y1  - 2019/08/07
KW  - animal migration
KW  - animal movement
KW  - animal tracking
KW  - avian migration
KW  - geolocator
KW  - Lanius collurio
KW  - light-level logger
KW  - protandry
KW  - red-backed shrike
KW  - Scandinavia
KW  - songbirds
KW  - Lanius collurio
KW  - Lanius collurio
PB  - Movebank data repository
UR  - http://dx.doi.org/10.5441/001/1.j71640kh
DO  - doi:10.5441/001/1.j71640kh
ER  - 
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