Data from: Linking the wintering and breeding grounds of warblers along the Pacific Flyway

• Main Authors: Toews, David P. L., Heavyside, Julian, Irwin, Darren E.
• Other Authors: Federated Research Data Repository, Dépôt fédéré de données de recherche
• Format: Dataset
• Language: unknown
• Published: 2021
• Subjects: Life sciences; medicine and health care; Other; isotopes; Setophaga coronata; Migration; Parulidae; connectivity; Western North America; envir; geo; Yukon; Pacific; Alaska
• Online Access: https://doi.org/10.5061/dryad.7ft57; https://doi.org/10.5683/SP2/H2WJVY; https://doi.org/10.14288/1.0397708

Dryad version number: 1 Version status: submitted Dryad curation status: Published Sharing link: https://datadryad.org/stash/share/Y0N7ttX8VQvSIQE6DZBAJ_i5Y8cG8ZqzLGObVcnEno4 Storage size: 6612238 Visibility: public Usage notes Isomap Assignment Output Files IsoMAP output files in .asc format for each feather. Directory substructure represents species (Audubon's versus myrtle) and is further divided by molt, with "alt" (alternate feather) versus basic (basic feather). isomap_output.zip Raw hydrogen isotope values and bird measurements yrwa_migration_isotope.csv Abstract Long-distance migration is a behavior that is exhibited by many animal groups. The evolution of novel migration routes can play an important role in range expansions, ecological interactions, and speciation. New migration routes may evolve in response to selection in favor of reducing distance between breeding and wintering areas, or avoiding navigational barriers. Many migratory changes are likely to evolve gradually and are therefore difficult to study. Here, we attempt to connect breeding and wintering populations of myrtle warblers (Setophaga coronata coronata) to better understand the possible evolution of distinct migration routes within this species. Myrtle warblers, unlike most other warblers with breeding ranges primarily in eastern North America, have two disjunct overwintering concentrations—one in the southeastern USA and one along the Pacific Coast—and presumably distinct routes to-and-from these locations. We studied both myrtle and Audubon's warblers (S. c. auduboni) captured during their spring migration along the Pacific Coast, south of the narrow region where these two taxa hybridize. Using stable hydrogen isotopes and biometric data, we show that those myrtle warblers wintering along the southern Pacific Coast of North America are likely to breed at high latitudes in Alaska and the Yukon rather than in Alberta or further east. Our interpretation is that the evolution of this wintering range and migration route along the Pacific ...