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Isotopes (δ2H) in wings and stored lipids of fall migratory monarch butterflies (Danaus plexippus) provide insights into population structure and nectaring origins.


ABSTRACT: We measured stable H isotope (δ2H) concentrations in wing and stored body lipids of fall migrating monarch butterflies (Danaus plexippus) from the eastern North American subpopulation along a transect from southern Ontario to overwintering sites in central Mexico from 2019 to 2021. We analysed wing δ2H to infer natal origins using both a spatially explicit approach and a categorical approach which assigned origins to north, central and southern portions of the breeding range west of the Appalachians. The fall migration differed in composition annually likely reflecting differential production of monarchs latitudinally due to varying climate conditions. Surprisingly, the composition of overwintering monarchs indicated that northern breeding regions contributed between

SUBMITTER: Hobson KA 

PROVIDER: S-EPMC11868386 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature