Table 1.

Definitions of habitat variables used in mixed-effects and generalized linear mixed models used to assess bowhead−killer whale interactions

Variable	Definition
Dsh	Distance to nearest coastline (continuous)
Dkw	Distance to killer whale (continuous)
Dedge	Distance to the sea ice edge* (continuous)
Depth	Water depth (continuous)
SIconc	Sea ice concentration (continuous)
$S{I}_{conc}^2$	Sea ice concentration squared (continuous)
isice	Categorical indicating whether individuals are in front of or behind the sea ice edge*
B	SSM inferred behavioral state, expressed continuously between 0 and 1
Bcat	SSM inferred behavioral state, expressed as two discrete categories
use	{0,1} categorical flag indicating if a location is a case (real location) or a conditional control location

^*Sea ice edge is defined as 15% sea ice concentration; <15% concentration is in front of the edge, while >15% concentration is behind the edge.