pone.0263031.g004.tif (77.98 kB)

Carbon and nitrogen stable isotope signatures in red blood cells of dunlins sampled at the Tagus estuary during autumn migration.

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posted on 2022-01-25, 18:36 authored by Teresa Catry, José Pedro Granadeiro, Jorge Sánchez Gutiérrez, Edna Correia

Early, mid and late correspond to three capture events (mid-July, early August and mid-August). Square symbols represent the expected signatures of dunlins (mean ± SD) at Iceland (obtained from chick feathers, n = 8) and Tagus estuary (obtained from overwintering birds during spring, n = 7).

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study adds substantially similar refuelling rates replenish energy stores physiological status suggests performing fewer stops moderate rates along larger fuel loads large estuarine wetland experience stronger pressures east atlantic flyway compare refuelling rates calidris alpina skipping migratory strategy single migratory strategy quality stopover site physiological state within key stopover site birds fly short particularly concerning decisions individuals stop primarily high fuel loads div >< p early birds showed fuelling stopping functions early autumn migrants within species stopover use stopover ecology migratory shorebirds migratory periods understanding non tagus estuary stationary periods prolonged fuelling previous knowledge plasma triglycerides late migrants intermediate fuelling hydroxybutyrate concentrations highest triglycerides higher haemoglobin hematocrit levels haemoglobin levels haematological profiles haematological parameters carrying capacity blood oxygen autumn migrations >, using

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