Table 3. Mean (range) environmental conditions at locations of right whale sightings with a calf present or absent.

Variable	Calf Present	Calf Absent	z-score	p
Depth (m)	14.9 (3.0–34.0)	15.5 (2.0–33.0)	−2.95	0.003
DistToShore (km)	17.6 (0.2–62.1)	18.5 (0.1–66.2)	−2.11	0.035
SST (°C)	14.9 (9.9–21.3)	14.7 (8.9–22.9)	−1.84	0.066
DistTo22Iso (km)	86.2 (11.7–135.3)	85.7 (−3.9–132.3)	−0.44	0.664

Environmental variables include bottom depth, distance to the shoreline (DistToShore), sea surface temperature (SST), and distance to the 22°C SST isotherm (DistTo22Iso).