TABLE 7.

Alpha (α)-diversity index of intestinal microbiota in grouper (E. coioides) at day 56.

	Control group	Experimental groups
	T1	T2	T3	T4
OTUs	403.25 ± 45.31	443.50 ± 41.76	417.25 ± 53.11	521.50 ± 48.53
Chao1	430.11 ± 40.50	481.05 ± 44.41	442.57 ± 52.08	558.32 ± 41.25
Ace	422.97 ± 33.65b	469.90 ± 39.66ab	434.56 ± 51.21ab	555.95 ± 42.46a
Shannon	5.09 ± 1.36	5.15 ± 1.16	4.65 ± 1.13	5.54 ± 0.81
Simpson	0.77 ± 0.18	0.83 ± 0.09	0.79 ± 0.13	0.90 ± 0.04
Good’s coverage (%)	99.93 ± 0.02	99.89 ± 0.03	99.90 ± 0.01	99.86 ± 0.02

Different characters in the same row data indicate significant differences (P < 0.05).

OUTs, operative taxonomical units.