Table 4.

Morphometric parameters of the intestine of rainbow trout fed probiotics continually (CON) and cyclically (CYC) and the control (CTRL).

	CTRL	CON	CYC
Average cross-section surface (µm2)	368,505.4 ± 235,495.5	533,749.5 ± 218,978.6 a ***	706,911.7 ± 267,860.5 a *** b *
Average villus height (µm)	1404.6 ± 289.3	1374.8 ± 296.4	1512.7 ± 396.6 b *
Average villus width (µm)	460.9 ± 92.0	432.6307 ± 101.9	435.8 ± 93.2

a—a significant difference to CTRL, b—a significant difference to CON. Levels of significance: * p < 0.05; *** p < 0.001.