Table 4. Dive characteristics (using the mean value per bout) of female and male murres during three stages of the annual cycle.
Values are GLMM model fits (mean ± SE) and 95% CI (in brackets) by sex according to stage. Bold indicates significant within stage sex differences, with the highest value in bold.
| Diving parameters | BPC (n = 18) | MOC (n = 17) | NPC (n = 19) | |||
|---|---|---|---|---|---|---|
| F (11) | M (7) | F (11) | M (6) 3 | F (12) | M (7) | |
| depth (m) | 50.0 ± 4.5 (41.2–58.7) | 58.6 ± 5.8 (47.3–69.9) | 35.5 ± 0.5 (33.6–37.4) | 48.6 ± 0.8 (47.1–50.1) | 51.6 ± 0.8 (50 .0–53.1) | 50.2 ± 1.2 (47.9–52.4) |
| bottom time 1 (s) | 31.9 ± 0.1 (31.8–32.1) | 27.0 ± 0.1 (26.8–27.3) | 28.8 ± 0.2 (28.3–29.2) | 24.9 ± 0.5 (23.9–26.0) | 45.6 ± 0.3 (45.1–46.2) | 43.2 ± 0.4 (42.4–44.0) |
| descent rate (ms-1) | 1.2 ± 0 (1.2–1.3) | 1.3 ± 0 (1.3–1.4) | 1.0 ± 0 (1.0–1.1) | 1.2 ± 0 (1.2–1.3) | 1.2 ± 0 (1.1–1.2) | 1.2 ± 0 (1.1–1.3) |
| ascent rate (ms-1) | 1.3 ± 0 (1.3–1.4) | 1.3 ± 0 (1.3–1.4) | 1.1 ± 0 (1.1–1.2) | 1.2 ± 0 (1.2–1.3) | 1.3 ± 0 (1.2–1.3) | 1.3 ± 0 (1.2–1.3) |
| post-dive interval 2 (s) | 151.6 ± 19.8 (111.8–191.4) | 160.6 ± 27.4 (105.5–215.7) | 110.2 ± 18.7 (72.4–148) | 144.8 ± 30.6 (82.3–205.8) | 174.4 ± 20.7 (132.6–216.2) | 191.5 ± 32.2 (126.2–256.5) |
1excludes bottom time = 0.
2dives with post dive intervals > 25 minutes.
3 excludes 1 male whose chick was lost.