Rosen D A, Trites A W
Marine Mammal Research Unit, University of British Columbia, Vancouver, Canada.
Comp Biochem Physiol A Physiol. 1997 Nov;118(3):877-81. doi: 10.1016/s0300-9629(97)00039-x.
The heat increment of feeding (HIF) was measured in six captive, juvenile Steller sea lions (Eumetopias jubatus), fed meals of either 2 or 4 kg of herring. HIF was calculated as the post-prandial increase in metabolism above baseline levels, and was measured using open-circuit (gas) respirometry. It averaged 12.4 +/- 0.9% (SE) of ingested energy intake for the 4-kg meal trials, and 9.9 +/- 0.9% for the 2-kg meal size. The effect lasted 8-10 hr for the larger meal size. Metabolism peaked 3.7 hr after feeding, and was 2.13 times higher than baseline levels. For the 2-kg meal size, the effect lasted 6-8 hr, with metabolism peaking 2.8 hr after ingestion at 1.76 times baseline levels. Our estimates of HIF for Steller sea lions are at the lower end of estimates for terrestrial mammals, and are consistent with estimates for other marine mammals.
对6只圈养的幼年北海狗（Eumetopias jubatus）进行了喂食热增量（HIF）的测量，分别投喂2千克或4千克鲱鱼。HIF计算为餐后代谢高于基线水平的增加量，采用开路（气体）呼吸测定法进行测量。在4千克餐量试验中，HIF平均为摄入能量的12.4±0.9%（标准误），2千克餐量时为9.9±0.9%。较大餐量的影响持续8至10小时。喂食后3.7小时代谢达到峰值，比基线水平高2.13倍。对于2千克餐量，影响持续6至8小时，摄入后2.8小时代谢达到峰值，为基线水平的1.76倍。我们对北海狗HIF的估计处于陆地哺乳动物估计值的下限，与其他海洋哺乳动物的估计值一致。
