Table 4. From the 1998, 1999, and 2004 shipboard surveys, for each species group, estimates of the ESHW (in meters), its CV, and significant covariates (when the data were adjusted for rounding) as derived in the original abundance estimate analyses. Covariates include: Beauf = Beaufort sea state; WTemp = sea surface water temperature; Wind = wind speed; Size = group size; Behav = behavior category; Cue = cue category; Depth = bottom depth; ObserverGrp = observer group; Slope = bottom slope; Period = first or second time period; None = no covariate found significant; NA = group size was the only covariate that was investigated.