Table 5. Alpha diversity results of gut microbiota of seabream fed two tested diets.

Number of reads per sample assigned to OTUs, and alpha diversity metrics values (normalized at the lowest sample size: 20,052 reads) of gut microbial community of gilthead sea bream fed CTRL (n = 4) or Sh108 (n = 6) diets for 90 days. Data are expressed as means ± SD. Different letters indicate statistically significant differences between groups (Student’s t-test, P < 0.05).

Diet	Reads	Observed species	Good’s coverage	PD Whole tree	Chao1	Shannon
CTRL	26,828 ± 7,248b	160 ± 19	0.99 ± 0.0	13.8 ± 1.0	172 ± 19	3.3 ± 0.7
Sh108	47,883 ± 9,482a	154 ± 24	0.99 ± 0.0	13.6 ± 1.9	172 ± 21	2.4 ± 0.7
Total number of reads taxonomically classified					394,611
Mean number of reads/sample					39,461 ± 13,626
Total number of OTUs					259