TABLE 1.

Alpha diversity analysis by a Wilcoxon test between day 0 and day 180 of the voyage

Parameter	Value for day		P value
	0	180
Chao1 index (interquartile range [25%, 75%])	924.641, 1,164.763	888.074, 1,058.560	0.39
Mean Shannon index ± SD	4.815646 ± 1.151	5.098 ± 0.852	0.30
Mean Simpson index ± SD	0.875 ± 0.082	0.908 ± 0.0515	0.18
Coverage index (interquartile range [25%, 75%])	595.675, 824.225	560.100, 903.400	0.14
PD scorea (interquartile range [25%, 75%])	26.593, 35.304	25.813, 39.775	0.94

^aPD, phylogenetic diversity.