Parameters Auto-HD Auto-LD Allo-HD Allo-LD Feed Numbers of visual bands 17 17 17 25 21 Shannon diversity index (H) 2.393 2.437 2.673 3.026 2.929 Shannon equitability index (EH) 0.644 0.673 0.852 0.824 0.891 Auto-HD: intestinal wall of gibel carp at the high stocking density; Auto-LD: intestinal wall of gibel carp at the low stocking density; Allo-HD: intestinal content of gibel carp at the high stocking density; Allo-LD: intestinal content of gibel carp at the low stocking density; Feed: diet. †The Shannon diversity index H = −Σpiln(pi) and Shannon equitability index EH = H/ ln (S) (where pi is the proportion of the ith band and S is the total number of visual bands).

Table 3: Numbers of visual bands, Shannon diversity index† and Shannon equitability index of the bacterial communities in the GI tract of gibel carp cultivated in two saline-alkali ponds of Eastern China at different stocking density.

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