Additional file 1 of Individual consistency in migration strategies of a tropical seabird, the Round Island petrel

Additional file 1. Table S1: Details of all geolocator deployments and recoveries on adult Round Island petrels from 2009 to 2019, and number of complete migrations which took place in each petrel year for the 62 petrels with repeat migrations. Table S2: Results of ANOVA tests for generalised linear model selection for the similarity of petrel migrations within- and between- individuals, using a) the earth mover’s distance (EMD) ‘effort’ values, and b) Bhattacharyya’s affinity (BA), and the spatiotemporal similarity of within-individual petrel migrations when split into c) six equal size stages, and d) 30-day periods, both using EMD. Significant effects (p < 0.05) are highlighted in bold. Table S3: Results of generalised linear model to investigate the similarity of petrel whole migrations within- and between- individuals, using Bhattacharyya's affinity (BA) values. Minimum adequate model is shown. Note, the binary categorical variable ‘same individual’ is being compared to the reference level of that variable, which is 0 (different individuals). Significant effects (p < 0.05) are highlighted in bold. Table S4: Pairwise comparisons between each level of the categorical variable ‘stage’ from the generalised linear model examining the spatiotemporal similarity of petrel migrations when split into six equal size stages, using earth mover’s distance (EMD) ‘effort’ values. Significant effects (p < 0.05) are highlighted in bold. Table S5: Results of generalised linear model to investigate the spatiotemporal similarity of within-individual petrel migrations when split into 30-day periods, using earth mover’s distance (EMD) ‘effort’ values. Minimum adequate model is shown and categorical variable ‘period’ is being compared to reference level of whole migration. Significant effects (p < 0.05) are highlighted in bold. Table S6: Pairwise comparisons between levels of the categorical variable ‘30-day period’ from the generalised linear model examining the spatiotemporal similarity of petrel migrations when split into 30-day periods, using earth mover’s distance (EMD) ‘effort’ values. Significant effects (p < 0.05) are highlighted in bold. Table S7: Colour of geographic coordinates in figures (main text and Additional File 1) and the corresponding year/s of each migration. Table S8. : The variance components and repeatability estimates (R) from adult Round Island petrels with repeated tracks (2-5 years) for departure date from the breeding colony, arrival at the colony and duration of the migratory period. Figure S1: Earth mover’s distance (EMD) values are calculated for both A) consecutive 30-day periods, irrespective of start date, and B) by splitting the migration into six equal stages. For A), this typically means that a short period of longer within-individual migrations is not included, however, there was evidence of individual consistency in migration duration and so this often only comprises a small proportion of the whole migration. Whereas for B), if one migration is longer than the other then each stage will comprise of more days than the other corresponding stage. Figure S2: Geographic coordinates (a) and tracks (b) from 62 adult Round Island petrels that have been tracked over multiple complete migrations (n = 131) with geolocators. Colours of lines and points represent the year of tracking (2009-17). Black diamond indicates the location of Round Island, Mauritius. Figure S3. Example tracks of between-individual Round Island petrel migration comparisons with the same relative overlap value (Bhattacharyya's affinity (BA) = 0.06), but with comparatively high (A), moderate (B), and low (C) earth mover’s distance ‘effort’ values. Positions denote twice-daily median locations with the two different years illustrated in different colours. Black diamond indicates the location of Round Island, Mauritius. The tracking year that each set of colours represents can be found in Additional File 1: Table S7.