Table 3.

Absolute abundance (log₁₀ gene copies/g mucosa) and estimators for species richness and diversity of the metabolically active bacterial microbiota at the cecal mucosa of finishing pigs ranked on RFI^a–c

	LRFI	HRFI	SEM	P-valuesd
Bacterial abundance	9.8	9.8	0.03	0.418
Chao1	3,044	3,246	200.7	0.457
Shannon	4.59	5.01	0.385	0.424
Simpson	0.80	0.83	0.038	0.513

^aValues are least squares means ± SEM.

^bHRFI, high RFI; LRFI, low RFI.

^cResidual feed intake was determined between days 42 and 91 pw (n = 8/RFI rank).

^dMain effect of RFI rank.