Figure S1. One individual track (in red) through the Hudson Bay complex, obtained from telemetry. It illustrates the general pattern of belugas' movements in this area, with the summer residency area in the Eastern Hudson Bay (EHB) and the migration path until winter areas in the Labrador Sea (LS).

Figure S3: Examples of results induced by the first passage time (FPT) method. Four simulated tracks are presented on the left side for four different levels of resources aggregation (A) Ag0, (B) Ag5, (C) Ag50, (D) Ag300). The variance among the FPT values calculated as a function of r are presented on the right side. The radius corresponding to the maximum peak in variance (highlighted by a dash line) indicates the most relevant scale to differentiate Area Restricted Search (modeled by Move1) from the unidirectional movement (Move2).

Figure S4: Spatial scales (obtained with the FPT method) of simulated movements within the summer area compared to those observed in the field (A) when individuals are dispersed through the area and (B) when they are aggregated according to the level of resources aggregation. The absence of significant difference (ns) tends to validate the process of movement simulated in the model. *, **, and *** indicate significant differences with P < 0.05, P < 0.01 and P < 0.001 respectively.

ece3656-sup-0002-FigureS2.docWord document46KFigure S2. Detailed Code of the model IRAMA developed using the R language.
ece3656-sup-0003-SupplementFigureCaptions.docWord document25K 

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