Title: "Pathway for personality development: juvenile red knots vary more in diet and exploratory behaviour than adults" Authors: Selin Ersoy, Christine E. Beardsworth, Elif Duran, Marcel T.J. van der Meer, Theunis Piersma, Ton G. G. Groothuis, Allert I. Bijleveld GENERAL INFORMATION Titles of the Dataset: Juv-Adult_Expl_Allyears (Exploration speed (mean speed cm/sec) in mobile arena), isotope data (plasma and red blood cell) Date of the data collection: Catching between 14 August 2018 - 19 October 2021 3. Geographic location of data collection: Western Dutch Wadden Sea (53°15'N, 5°15'E) 4. Corresponding author information: Selin Ersoy, NIOZ Royal Netherlands Institute for Sea Research, Department of Coastal Systems, PO Box 59, 1790 AB Den Burg, Texel, The Netherlands, selin.ersoy@gmail.com METHODS Isotope data: Red blood cell and plasma d13C and d15N isotopes collected from the blood samples of red knots. Exploration speed: Movement tracjectories were collected from the recordings of the top camera during experiments in the mobile arena. We used the distance between estimated positions to calculate speed. Errors in the positioning algorithm were filtered by excluding speeds higher than 200 cm/s. An individual’s exploration speed was calculated as the average speed during each 20 min trial. The dataset includes two repeats of exploration speed. DATA & FILE OVERVIEW Juv-Adult_Expl_Allyears : Exploration speed repeated measures from Juvenile and Adult red knots Column 1: FB: Unique metal ring number of red knots. Ring were put on the legs Column 2: Exp: Repeat number of the exploration assay trials Column 3: Age: Adult (3) or juvenile (1) age Column 4: Mean: Exploratory score of individual measured in mobile arena (mean speed cm/sec) measured through automated tracking Column 5: Year: Year of the testing Isotope : Red blood cell and plasma d13C and d15N isotopes collected from the blood samples of juvenile and adult red knots Column 1: RingNr: Unique metal ring number of red knots. Ring were put on the legs Column 2: Type: Blood type plasma or red blood cell Column 3: Repeat: If there is a repeated samples of an individual Column 4: d15N: Nitrogen 15 Isotope value Column 5: d13C: Carbon 13 Isotope value Column 6: ProcessDate:Process date of blood samples Column 7: Comments: important commments about samples Column 8: AGE: Adult (3) or juvenile (1) age Column 9: CatchDate: Cathing date of the individuals Column 10: CATCH_YEAR: Catching year of the individuals (taken from CatchDate) SIBER-2021-12-21.csv: Isotope data was organised for SIBER analysis #https://cran.r-project.org/web/packages/SIBER/vignettes/Introduction-to-SIBER.html iso1: RingNr: Unique metal ring number of red knots. Ring were put on the legs iso2: Type: Blood type plasma or red blood cell group: equals to AGE in isotope dataset (1=Juvenile, 2=Second-calendar year which is not used for this study, 3=Adult) community: equals to CATCH_YEAR in isotope dataset (1= 2018, 3= 2019 *which are not used for this analyses, 2= 2021) R file includes code for all the statistics and visualization of the data.