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- W3122918668 abstract "Abstract The Bank Swallow (Riparia riparia), a threatened species in Canada, breeds primarily in banks at lakeshores and rivers and in artificial (typically inland) aggregate mining pits. Inland pits may be ecological traps for this species, but relative dietary trade-offs between these two nesting habitats have not been investigated. The availability of aquatic emergent insects at lakeshores may have associated nutritional benefits for growing nestlings due to increased omega-3 fatty acids (FAs) in prey. We compared the diets of juvenile swallows from lakeshore and inland pit sites using assays of stable isotope values (δ13C, δ15N, δ2H) of feathers, faecal DNA metabarcoding and blood plasma FAs. Colony proximity to Lake Erie influenced the use of aquatic versus terrestrial insects by Bank Swallow adults and juveniles. Feather δ2H was particularly useful as a tracer of aquatic emergent versus terrestrial prey, and inland juveniles had feathers enriched in 2H, reflective of diets composed of fewer aquatic emergent insects. DNA metabarcoding of juvenile and adult faecal material indicated that lakeshore birds consumed more aquatic-emergent chironomids than inland birds. Lakeshore juveniles had elevated plasma omega-3 eicosapentaenoic acid levels compared with inland pit-breeding birds. We discuss the need to consider ‘nutritional landscapes’ and the importance of this concept in conservation of declining species and populations." @default.
- W3122918668 created "2021-02-01" @default.
- W3122918668 creator A5009915616 @default.
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- W3122918668 date "2021-01-01" @default.
- W3122918668 modified "2023-09-30" @default.
- W3122918668 title "Nutritional consequences of breeding away from riparian habitats in Bank Swallows: new evidence from multiple endogenous markers" @default.
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- W3122918668 doi "https://doi.org/10.1093/conphys/coaa140" @default.
- W3122918668 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7836397" @default.
- W3122918668 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33532072" @default.
- W3122918668 hasPublicationYear "2021" @default.
- W3122918668 type Work @default.