Sample sizes and means ± SE for body mass and composition.

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.本研究中受试动物的各项指标如下：平均值±标准误的总体质量（total body mass, MT）、总体水量（total body water, TBW），以及经同位素稀释法测定的脂质储备（以占MT的百分比计），另有鲸脂活检样本的脂质含量（以湿重百分比计）。所有受试动物按季节与繁殖状态进行分类，样本量标注于括号内。