First explorations: ontogeny of central-place-foraging directions in two tropical seabirds
Collet, Julien et al. (2020), First explorations: ontogeny of central-place-foraging directions in two tropical seabirds, Dryad, Dataset, https://doi.org/10.5061/dryad.kwh70rz0t
Birds were captured on nest and fitted with GPS-data loggers with adhesive tape. From the GPS tracks we identified each single foraging excursions from the colony, each one corresponds to one row in the provided dataset (TripMetadata.csv).
For each foraging trip we extracted statitistics such as the distance and direction from colony along diverse points of the track: maximum range from colony, different % of the maximum range from colony on both the way out and the way in, or the first point reaching 10, 20, etc. km from the colony both on the way out and the way in. From each of these points we also extracted a standardized straightness index.
Finally we also added information on wind (u,v as available from NOAA servers, but also transformed into other referentials e.g. wind direction and speed (polar referential) or in parallel/perpendicular to flight direction referential.
See M&M for more details on data collection and the analyses reported in the manuscript.
All analyses presented can be replicated following the script StatisticalAnalyses&Figures.R, as well as all figures except for Fig1 which requires original tracking data.
Notably, analyses on resemblance call on two specific scripts to establish resemblance between all possible pairs of trips (for juv and ad, respectively).
Sensitivity analyses can be carried by changing parameter values, or in the case of changing the definition of trip directions (e.g. first 10km) by using the script DirectionAt10km.
FP7 Ideas: European Research Council, Award: ERC-2012-ADG_20120314
Centre National de la Recherche Scientifique, Award: Iles Eparses
Institut de Recherche pour le Développement, Award: Iles Eparses
Agence des Aires Marines Protégées, Award: Iles Eparses
Ministere de l'Enseignement Supérieur et de la Recherche, Award: Facteurs influnçant les stratégies de recherche de nourriture des oiseaux marins