Summary of diving data as recorded by a time-depth recorder on two female leatherback sea turtles during a single internesting interval at St Croix, US Virgin Islands
| . | Depth (m) . | Dive time (min) . | Surface interval (min) . | Bottom duration (min) . | Descent rate (m s-1) . | Ascent rate (m s-1) . |
|---|---|---|---|---|---|---|
| Leatherback 5 | ||||||
| All data | ||||||
| Mean | 93.0 | 10.3 | 3.4 | 2.6 | 0.54 | 0.32 |
| S.D. | 72.8 | 6.8 | 7.9 | 1.9 | 1.5 | 1.9 |
| N | 971 | 971 | 971 | 971 | 971 | 971 |
| Maximum | 490 | 23.3 | 166.6 | 8.7 | 24.8 | 9.4 |
| Day | ||||||
| Mean | 111.6 | 11.2 | 4.2 | 2.9 | 0.71 | 0.28 |
| S.D. | 79.7 | 6.8 | 8.0 | 2.0 | 2.0 | 2.6 |
| N | 503 | 503 | 503 | 503 | 503 | 503 |
| Maximum | 490 | 22.7 | 166.6 | 7.3 | 24.8 | 9.4 |
| Night | ||||||
| Mean | 73.0 | 9.4 | 2.5 | 2.3 | 0.36 | 0.35 |
| S.D. | 58.3 | 6.7 | 7.7 | 1.8 | 0.12 | 0.16 |
| N | 468 | 468 | 468 | 468 | 468 | 468 |
| Maximum | 294 | 23.3 | 166.6 | 8.7 | 0.8 | 1.4 |
| Leatherback 6 | ||||||
| All data | ||||||
| Mean | 64.0 | 10.2 | 8.9 | 3.2 | 0.28 | 0.30 |
| S.D. | 57.0 | 7.2 | 19.3 | 2.6 | 0.11 | 0.14 |
| N | 978 | 978 | 978 | 978 | 978 | 978 |
| Maximum | 480 | 29.3 | 294 | 11.7 | 1.2 | 1.0 |
| Day | ||||||
| Mean | 93.7 | 12.4 | 16.1 | 3.8 | 0.31 | 0.35 |
| S.D. | 67.8 | 6.3 | 29.1 | 2.4 | 0.12 | 0.16 |
| N | 382 | 382 | 382 | 382 | 382 | 382 |
| Maximum | 480 | 29.3 | 294 | 11.7 | 1.0 | 1.0 |
| Night | ||||||
| Mean | 44.9 | 8.9 | 4.3 | 2.8 | 0.26 | 0.27 |
| S.D. | 38.3 | 7.3 | 3.6 | 2.6 | 0.10 | 0.12 |
| N | 596 | 596 | 596 | 596 | 596 | 596 |
| Maximum | 184 | 28.7 | 39.7 | 11.0 | 1.2 | 0.7 |
| . | Depth (m) . | Dive time (min) . | Surface interval (min) . | Bottom duration (min) . | Descent rate (m s-1) . | Ascent rate (m s-1) . |
|---|---|---|---|---|---|---|
| Leatherback 5 | ||||||
| All data | ||||||
| Mean | 93.0 | 10.3 | 3.4 | 2.6 | 0.54 | 0.32 |
| S.D. | 72.8 | 6.8 | 7.9 | 1.9 | 1.5 | 1.9 |
| N | 971 | 971 | 971 | 971 | 971 | 971 |
| Maximum | 490 | 23.3 | 166.6 | 8.7 | 24.8 | 9.4 |
| Day | ||||||
| Mean | 111.6 | 11.2 | 4.2 | 2.9 | 0.71 | 0.28 |
| S.D. | 79.7 | 6.8 | 8.0 | 2.0 | 2.0 | 2.6 |
| N | 503 | 503 | 503 | 503 | 503 | 503 |
| Maximum | 490 | 22.7 | 166.6 | 7.3 | 24.8 | 9.4 |
| Night | ||||||
| Mean | 73.0 | 9.4 | 2.5 | 2.3 | 0.36 | 0.35 |
| S.D. | 58.3 | 6.7 | 7.7 | 1.8 | 0.12 | 0.16 |
| N | 468 | 468 | 468 | 468 | 468 | 468 |
| Maximum | 294 | 23.3 | 166.6 | 8.7 | 0.8 | 1.4 |
| Leatherback 6 | ||||||
| All data | ||||||
| Mean | 64.0 | 10.2 | 8.9 | 3.2 | 0.28 | 0.30 |
| S.D. | 57.0 | 7.2 | 19.3 | 2.6 | 0.11 | 0.14 |
| N | 978 | 978 | 978 | 978 | 978 | 978 |
| Maximum | 480 | 29.3 | 294 | 11.7 | 1.2 | 1.0 |
| Day | ||||||
| Mean | 93.7 | 12.4 | 16.1 | 3.8 | 0.31 | 0.35 |
| S.D. | 67.8 | 6.3 | 29.1 | 2.4 | 0.12 | 0.16 |
| N | 382 | 382 | 382 | 382 | 382 | 382 |
| Maximum | 480 | 29.3 | 294 | 11.7 | 1.0 | 1.0 |
| Night | ||||||
| Mean | 44.9 | 8.9 | 4.3 | 2.8 | 0.26 | 0.27 |
| S.D. | 38.3 | 7.3 | 3.6 | 2.6 | 0.10 | 0.12 |
| N | 596 | 596 | 596 | 596 | 596 | 596 |
| Maximum | 184 | 28.7 | 39.7 | 11.0 | 1.2 | 0.7 |