Table 1 Summary of metrics used to describe individual movement patterns and identify high-use locations in the marine environment. Global metrics reflect movement patterns of individual fish in a given year. Local metrics describe space use at a given location (node, for network analysis; receiver, for G*). Italicized metric names indicate metrics that were calculated using network analysis

Global metrics (individual fish)

Node density

Proportion of nodes used out of all possible nodes

Proportion of the network used by an individual

Edge density

Proportion of edges used out of all possible edges

Mobility of an individual

Network diameter

Longest of shortest paths along observed edges between all pairs of observed nodes

Spatial extent of the network used by an individual

Clustering coefficient

Probability that two neighbours of a given node are themselves connected by an edge

Circulation within a region (high clustering coefficient) or directed movements (low clustering coefficient)

Total distance

Minimum total distance, from Coppermine River, along observed edges, back to Coppermine River

Minimum observed mobility of an individual

Furthest distance

Furthest distance from the Coppermine River to a receiver where an individual was detected

Minimum furthest distance traveled by an individual

Days undetected

Proportion of days during the ice-free season (until freshwater return) that an individual was not detected

Absence from array or movement outside detection range of receivers

Freshwater return

Decimal day of year when an individual returned to freshwater (the Coppermine River) to overwinter

Time that marine foraging ceased

Local metrics (receiver locations)

Node strength

Number of movements to and from a given node, including self-edges

Locations with high activity (number of movements)

Restricted betweenness

Number of movements that pass through a given node

Movement corridors

Local Getis G*

Duration of residence events within 6000 m¹of a given receiver, relative to time spent at all locations

Regions with high activity (duration of residence events)