TY - JOUR
T1 - Individual variability and versatility in an eco-evolutionary model of avian migration
AU - Delmore, Kira E.
AU - Van Doren, Benjamin M.
AU - Conway, Greg J.
AU - Curk, Teja
AU - Garrido-Garduño, Tania
AU - Germain, Ryan R.
AU - Hasselmann, Timo
AU - Hiemer, Dieter
AU - van der Jeugd, Henk P.
AU - Justen, Hannah
AU - Lugo Ramos, Juan Sebastian
AU - Maggini, Ivan
AU - Meyer, Britta S.
AU - Phillips, Robbie J.
AU - Remisiewicz, Magdalena
AU - Roberts, Graham C.M.
AU - Sheldon, Ben C.
AU - Vogl, Wolfgang
AU - Liedvogel, Miriam
N1 - 7133, VT; Data archiving: no NIOO data
PY - 2020/11
Y1 - 2020/11
N2 - Seasonal migration is a complex and variable behaviour with the potential to promote reproductive isolation. In Eurasian blackcaps (Sylvia atricapilla), a migratory divide in central Europe separating populations with southwest (SW) and southeast (SE) autumn routes may facilitate isolation, and individuals using new wintering areas in Britain show divergence from Mediterranean winterers. We tracked 100 blackcaps in the wild to characterize these strategies. Blackcaps to the west and east of the divide used predominantly SW and SE directions, respectively, but close to the contact zone many individuals took intermediate (S) routes. At 14.0° E, we documented a sharp transition from SW to SE migratory directions across only 27 (10-86) km, implying a strong selection gradient across the divide. Blackcaps wintering in Britain took northwesterly migration routes from continental European breeding grounds. They originated from a surprisingly extensive area, spanning 2000 km of the breeding range. British winterers bred in sympatry with SW-bound migrants but arrived 9.8 days earlier on the breeding grounds, suggesting some potential for assortative mating by timing. Overall, our data reveal complex variation in songbird migration and suggest that selection can maintain variation in migration direction across short distances while enabling the spread of a novel strategy across a wide range.
AB - Seasonal migration is a complex and variable behaviour with the potential to promote reproductive isolation. In Eurasian blackcaps (Sylvia atricapilla), a migratory divide in central Europe separating populations with southwest (SW) and southeast (SE) autumn routes may facilitate isolation, and individuals using new wintering areas in Britain show divergence from Mediterranean winterers. We tracked 100 blackcaps in the wild to characterize these strategies. Blackcaps to the west and east of the divide used predominantly SW and SE directions, respectively, but close to the contact zone many individuals took intermediate (S) routes. At 14.0° E, we documented a sharp transition from SW to SE migratory directions across only 27 (10-86) km, implying a strong selection gradient across the divide. Blackcaps wintering in Britain took northwesterly migration routes from continental European breeding grounds. They originated from a surprisingly extensive area, spanning 2000 km of the breeding range. British winterers bred in sympatry with SW-bound migrants but arrived 9.8 days earlier on the breeding grounds, suggesting some potential for assortative mating by timing. Overall, our data reveal complex variation in songbird migration and suggest that selection can maintain variation in migration direction across short distances while enabling the spread of a novel strategy across a wide range.
KW - assortative mating
KW - divide
KW - migration
KW - songbird
KW - speciation
KW - timing
KW - international
KW - Plan_S-Compliant_OA
UR - https://doi.org/10.6084/m9.figshare.c.5179391
U2 - 10.1098/rspb.2020.1339
DO - 10.1098/rspb.2020.1339
M3 - Article
C2 - 33143577
AN - SCOPUS:85095583454
SN - 0962-8452
VL - 287
JO - Proceedings of the Royal Society B-Biological Sciences
JF - Proceedings of the Royal Society B-Biological Sciences
IS - 1938
M1 - 20201339
ER -