Year-round activity levels reveal diurnal foraging constraints in the annual cycle of migratory and non-migratory barnacle geese.

ABSTRACT: Performing migratory journeys comes with energetic costs, which have to be compensated within the annual cycle. An assessment of how and when such compensation occurs is ideally done by comparing full annual cycles of migratory and non-migratory individuals of the same species, which is rarely achieved. We studied free-living migratory and resident barnacle geese belonging to the same flyway (metapopulation), and investigated when differences in foraging activity occur, and when foraging extends beyond available daylight, indicating a diurnal foraging constraint in these usually diurnal animals. We compared foraging activity of migratory (N = 94) and resident (N = 30) geese throughout the annual cycle using GPS-transmitters and 3D-accelerometers, and corroborated this with data on seasonal

SUBMITTER: Boom MP 

PROVIDER: S-EPMC10307695 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature