Table 1.

Dive statistics of foraging and non-foraging bowhead whale dives. (Numbers in brackets indicate standard deviation.)

		Bm123a	Bm126a	Bm126b	Bm127a	Bm129a	Bm130a	Bm137a	mean
U-shaped foraging dives	n	1	1	3	3	1	10	0
	maximum depth (m)	90	105	99	115	127	45	—
	mean maximum depth (m)	90	105	97 (2.3)	90 (36.1)	127	31 (9.4)	—
	range maximum depth (m)	90	105	94–99	49–105	127	17–45	—
	mean dive time (min)	20.6		11.2	13.4	18.4	12.5	—	15.2
	speed (m s−1), descent	1.6	1.3	1.7 (0.26)	1.5 (0.29)	1.4	1.0 (0.17)	—	1.43
	speed (m s−1), ascent	1.3	1.5	1.0 (0.32)	1.5 (0.54)	1.4	0.8 (0.07)	—	1.24
	speed (m s−1), bottom	0.8		0.6 (0.33)	0.6 (0.18)	0.8	0.6 (0.08)	—	0.67
	noise calibration speed (m s−1)	0.8 (0.2)		0.9 (0.1)	0.9 (0.2)	0.7 (0.1)	0.8 (0.1)	—	0.82
	fluking rate (Hz), descent	0.05 (0.03)		0.07 (0.03)	0.13 (0.003)	0.09 (0.01)	0.07 (0.04)	—	0.08
	fluking rate (Hz), ascent	0.08 (0.13)	0.03	0.05 (0.01)	0.07 (0.02)	0.09	0.05 (0.05)	—	0.06
	fluking rate (Hz), bottom	0.13	0.07	0.11 (0.01)	0.13 (0.01)	0.13	0.15 (0.01)	—	0.12
V-shaped search dives	n	2	11	0	13	0	0	7
	maximum depth (m)	81	124	—	80	—	—	221
	mean maximum depth (m)	76 (6.29)	66 (42.5)	—	33 (18.2)	—	—	173 (43.8)
	range maximum depth (m)	72–81	15–124	—	16–80	—	—	93–221
	mean dive time (min)	6.1	8.9	—	4.8	—	—	16.3	9.0
	speed (m s−1), descent	1.6 (0.02)	0.8 (0.26)	—	1.4 (0.27)	—	—	1.3 (0.33)	1.27
	speed (m s−1), ascent	1.5 (0.03)	1.2 (0.38)	—	1.1 (0.27)	—	—	1.6 (0.42)	1.34
	fluking rate (Hz), descent	0.07 (0.03)	0.07 (0.02)	—	0.12 (0.03)	—	—	0.09 (0.02)	0.09
	fluking rate (Hz), ascent	0.10 (0.02)	0.05 (0.05)	—	0.08 (0.04)	—	—	0.04 (0.03)	0.07