Table 5.
Surface duration behaviour of Cuvier's beaked whales off Cape Hatteras. See the text for the definition of surface types. Surface durations were not calculated for ZcTag050 due to probable data errors. Medians and means are given for each individual, along with coefficients of variation for the mean (CV). The number of surfacings in each category is less than the total in the all surfaces column because some surfacings (4.2%) could not be classified due to data gaps.
| all surface durations (min) |
terminal surface duration |
first surface duration |
intermediate surface duration |
single surface duration |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| tag ID | n | median mean (CV) |
maximum | n | median mean (CV) |
n | median mean (CV) |
n | median mean (CV) |
n | median mean (CV) |
| ZcTag029 | 807 | 2.3 5.0 (304.4) |
310.0 | 139 | 4.3 7.1 (145.3) |
149 | 2.5 5.6 (261.6) |
457 | 2.1 3.4 (259.5) |
4 | 31.2 93.6 (156.4) |
| ZcTag030 | 1204 | 2.2 3.8 (216.7) |
141.4 | 236 | 4.3 5.8 (110.8) |
237 | 2.7 4.1 (218.2) |
660 | 1.9 2.4 (163.6) |
11 | 10.7 44.4 (106.4) |
| ZcTag038 | 1519 | 2.2 4.8 (239.1) |
139.9 | 314 | 4.0 8.7 (196.9) |
318 | 2.3 3.5 (217.3) |
858 | 2.1 3.6 (245.6) |
4 | 10.8 29.2 (144.6) |
| ZcTag040 | 30 | 2.3 4.4 (140.1) |
32.6 | 8 | 8.1 10.4 (96.4) |
9 | 2.5 2.6 (13.8) |
12 | 2.0 2.0 (11.0) |
0 | — |
| ZcTag041 | 967 | 2.0 4.7 (190.4) |
96.5 | 252 | 3.8 8.6 (137.3) |
249 | 1.7 2.8 (165.9) |
428 | 1.7 2.6 (159.4) |
17 | 30.8 34.6 (69.3) |
| ZcTag042 | 421 | 2.1 4.1 (181.2) |
85.4 | 88 | 4.2 5.2 (69.9) |
89 | 2.4 4.6 (219.0) |
211 | 1.8 3.2 (216.2) |
2 | 17.0 17.0 (103.7) |
| ZcTag046 | 187 | 1.8 3.9 (190.2) |
57.8 | 50 | 3.1 7.4 (153.4) |
51 | 1.6 2.2 (95.3) |
64 | 1.4 1.7 (117.5) |
7 | 3.5 10.5 (137.2) |
| ZcTag048 | 583 | 2.0 2.9 (109.6) |
40.8 | 130 | 3.4 4.9 (106.2) |
122 | 2.3 2.7 (80.5) |
288 | 1.8 1.9 (69.8) |
12 | 3.9 5.3 (64.3) |
| ZcTag050 | — | — | — | — | — | ||||||
| ZcTag051 | 139 | 4.2 22.3 (155.3) |
182.5 | 45 | 13.4 20.0 (116.4) |
47 | 2.7 9.4 (223.8) |
29 | 2.4 11.6 (176.6) |
15 | 85.0 84.2 (52.4) |
| Total | 5857 | 2.2 4.7 (245.7) |
310 | 1262 | 4.0 7.7 (162.7) |
1271 | 2.3 3.9 (237.1) |
3007 | 1.9 3.0 (232.1) |
72 | 20 41.7 (125.3) |