Table 1. Sample sizes and means ± SE for body mass and composition.
| Season | Reproductive Status | Total Body Mass (MT; kg) | TBW (%MT) | Lipid by HTO (%MT) | Blubber Biopsy Lipid Content (%) |
| Jan/Feb | Skip-Breeding Female | 320.7±10.3 (52) | 50.7±0.5 (32) | 30.5±0.7 (32) | 79.3±1.3 (49) |
| Male | 231.8±12.5 (10) | 50.2±0.7 (7) | 31.4±1.1 (7) | 86.2±2.2 (5) | |
| Oct/Nov | Non-Reproductive Female | 335.8±14.2 (28) | 45.9±0.6 (22) | 37.6±0.8 (22) | 83.5±1.4 (24) |
| Reproductive Female | 413.7±13.3 (16) | 46.4±0.6 (13) | 36.8±0.9 (13) | 84.1±1.9 (17) | |
| Male | 294.6±11.7 (5) | 47.5±1.2 (2) | 35.4±1.9 (2) | --- | |
| Overall | All | 328.8±7.6 (111) | 48.5±0.4 (76) | 33.9±0.6 (76) | 81.6±0.9 (95) |
Mean ± SE total body mass (MT), total body water (TBW) and lipid stores as determined by isotopic dilution (as %MT), and lipid content of blubber biopsies (% wet mass) for animals handled throughout this study. Animals are classed by season and reproductive status, and sample sizes are in parentheses.