Figure 1.

Carbon dioxide production, energy expenditure and ¹⁴CO₂ recovery in sows given a single meal of half of daily intake. After a 12 h food-deprivation, intravenous NaH¹⁴CO₃ solutions were infused for 2 h prior to feeding and for 6 h after feeding. CO₂ production and energy expenditure were calculated each minute and breath ¹⁴CO₂ was collected in 30 min periods. Data are means of n = 5 sows at each time point. : Energy expenditure. : CO₂ production. ●: ¹⁴CO₂ recovery.