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Table 1 Gas exchange parameters of sows receiving either a single (F1) or hourly (F8) meals1

From: Pattern of carbon dioxide production and retention is similar in adult pigs when fed hourly, but not when fed a single meal

   Fasting Peak Postprandial
CO2 (L/min): F1 0.773a ± 0.052 1.470b ± 0.053 0.990c ± 0.074
  F8 n.d.2 1.489a ± 0.110 1.039b ± 0.053
  P value, F1 vs F83   0.29 0.001
O2 (L/min): F1 0.871a ± 0.060 1.632b ± 0.056 1.084c ± 0.110
  F8 n.d. 1.614a ± 0.131 1.139b ± 0.062
  P value, F1 vs F83   0.39 0.001
Respiratory quotient (ratio): F1 0.888a ± 0.029 0.901ab ± 0.027 0.916b ± 0.048
  F8 n.d. 0.924a ± 0.039 0.912b ± 0.019
  P value, F1 vs F83   0.003 0.26
Energy expenditure (kJ/min): F1 17.97a ± 1.21 33.78b ± 1.10 22.51c ± 2.12
  F8 n.d. 33.58a ± 2.60 23.63b ± 1.25
  P value, F1 vs F83   0.64 0.001
  1. 1 Data are means ± SD for n = 5 sows. F1 data are from 8 h infusions including a 2 h fasting phase and a single bolus feeding; F8 data are from 4 h infusions with 8 hourly feeds beginning 2 h prior to infusion. For data with letter superscripts within a row, those not sharing a letter are different (P < 0.05) across phases and within feeding mode. 2 Not determined 3 Differences between feeding modes and within a phase (P < 0.05)