Fig. 4.

Short-chain fatty acids (SCFA) concentrations (μmol/g, dry basis) in ileum and cecum of pigs with/without HS. The concentrations of acetate (A), propionate (B), butyrate (C), isovalerate (D), valerate (E), isobutyrate (F), and total SCFA (G) in the intestine. Total SCFA are the sum of the following SCFA: acetate, propionate, isobutyrate, butyrate, isovalerate, valerate. Values are means (n = 8/group), with their standard errors represented by vertical bars. ^a,b Mean values with unlike letters are statistically significant (P < 0.05). TN = thermoneutral; HS = heat stress; PF = pair-fed.