Table 2.

OTUs and Alpha diversity statistics of the microbial sequencing of the northern snakehead intestine (mean ± S.D. of three replications).

Groups	Reads		Tags	OTUs	97% similarity
Groups	Raw reads	Valid reads	Tags	OTUs	Sobs	Chao	ACE	Shannon	Simpson
G1	49764	42297	40734	157 ± 12^a	157 ± 9^a	163 ± 11^a	168 ± 10^a	2.16 ± 0.11^a	0.22 ± 0.01^b
G2	43826	41837	41701	165 ± 17^a	165 ± 13^a	165 ± 12^a	167 ± 9^a	2.40 ± 0.09^b	0.25 ± 0.02^b
G3	47084	41939	41149	150 ± 16^a	150 ± 11^a	159 ± 9^a	164 ± 12^a	2.17 ± 0.13^a	0.22 ± 0.00^b
G4	43414	41385	41193	230 ± 19^b	230 ± 14^b	231 ± 21^b	233 ± 17^b	2.48 ± 0.16^b	0.18 ± 0.02^a

Means shown in the same column with different superscript letters are significantly different (P < 0.05) according to Tukey’s test.