. 2020 Mar 9;117(12):6590–6598. doi: 10.1073/pnas.1911761117

Table 3.

Multiparameter SSF models of bowhead whale locations relative to sea ice concentration, sea ice concentration squared, depth, distance to shore, distance to ice edge, and interactions between all main effects and distance to killer whales

Model	d.f.	AIC	∆AIC
SI_concD_kw + SI²_concD_kw + DepthD_kw + D_shD_kw + (D_edge:is_ice)*D_kw	13	20,787	0
SI_concD_kw + SI2_concD_kw + D_shD_kw + (D_edge:is_ice)D_kw	11	20,794	7
DepthD_kw + D_shD_kw + (D_edge:is_ice)*D_kw	9	20,821	34
SI_concD_kw + SI²_concD_kw + DepthD_kw + D_shD_kw	9	20,842	55
SI_concD_kw + SI²_concD_kw + D_sh*D_kw	7	20,851	64
DepthD_kw + D_shD_kw	5	20,913	126
D_sh + D_sh: D_kw	2	20,927	140
SI_concD_kw + SI²_concD_kw + DepthD_kw + (D_edge:is_ice)D_kw	11	20,961	174
SI_conc + SI²_conc + Depth + D_sh + (D_edge:is_ice) + D_kw	7	20,973	186
SI_conc + SI²_conc + Depth + D_sh + (D_edge:is_ice)	6	20,986	199
SI_concD_kw + SI²_concD_kw + Depth*D_kw	7	21,027	240
D_kw + D_sh: D_kw	2	21,079	292
SI_concD_kw + SI²_concD_kw + (D_edge:is_ice)*D_kw	9	21,082	295
Null	1	21,337	550

See Table 1 for definition of terms.