Data from: Body stores persist as fitness correlate in a long-distance migrant released from food constraints ...
Long-distance migratory birds rely on acquisition of body reserves to fuel their migration and reproduction. Breeding success depends on the amount of body reserve acquired prior to migration, which is thought to increase with access to food at the fuelling site. Here we studied how food abundance d...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Dataset |
| Language: | English |
| Published: |
Dryad
2018
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.6b55m22 https://datadryad.org/stash/dataset/doi:10.5061/dryad.6b55m22 |
| Summary: | Long-distance migratory birds rely on acquisition of body reserves to fuel their migration and reproduction. Breeding success depends on the amount of body reserve acquired prior to migration, which is thought to increase with access to food at the fuelling site. Here we studied how food abundance during fuelling affected time budgets and reproductive success. In a regime of plenty, we expected that (1) limitations on food harvesting would become lifted, allowing birds to frequently idle, and (2) that birds would reach sufficient fuel loads, such that departure weight would no longer affect reproductive success. Our study system comprised brent geese (Branta b. bernicla) staging on high-quality agricultural pastures. Fuelling conditions were assessed by a combination of high-resolution GPS-tracking, acceleration-based behavioural classification, thermoregulation modelling, and measurements of food digestibility and excretion rates. Mark-resighting analysis was used to test for correlations between departure ... : GPS, accelerometer and environmental data for individually tracked brent geeseGPS and accelerometer tracking data of individual dark-bellied Brent geese, linked to metadata on bathymetry and tidal information.gps_acc_brent.csvField observations of defecations and antagonistic interactionsField observations of defecations and antagonistic interactions of dark-bellied brent geese on Terschelling islandbehavioural_observations.csvBiometry and resightings of dark-bellied brent geeseBiometry and resightings of dark-bellied brent geese captured on Terschelling island in 2005, 2010, 2011, 2013, 2014 (i.e. successful breeding years in the arctic when birds returned with juveniles) as obtained from the geese.org database (accessed 24 Feb 2016).catches_resightings.csvsampling locationslocations of exclosures and locations of 4 m^2 circles in which geese droppings were collectedstations.csvgrass and brent goose excreta samplingPasture grass and excreta sampling and chemical analysis, goose excreta densities and ... |
|---|