Table 1.

Physical characteristics (temperature) of successful foraging zones.

seal	range of depth targeted within successful foraging area (m)	temperature (mean±s.d.) (°C) within successful foraging zone, temp. 1	temperature (mean±s.d.) (°C) within global zone, temp. 2	t-test between temp. 1 and temp. 2
1	500–550	−0.56±0.71	−0.16±0.89	t=3.28, p=0.001
2	400–450	2.71±0.16	2.43±0.28	t=−8.99, p<0.001
3	500–550	—	—	—
4	500–550	—	—	—
5	500–550	−0.31±0.48	−0.14±0.88	t=1.46, p=0.15
6	200–250	2.63±0.08	2.21±0.64	t=10.31, p<0.001
		1.90±0.05		t=7.95, p<0.001
7	200–250	−1.25±0.07	−0.49±1.04	t=8.82, p<0.001
8	300–350	−1.96±0.13	−1.76±0.45	t=7.64, p<0.001
9	300–350	−1.83±0.04	−1.84±0.05	t=0.89, p=0.37
10	400–450	−0.97±0.68	−0.72±0.77	t=−1.00, p=0.34