Table 3.

Length change of intestinal villus of O. stewarti juveniles under different durations of heat stress.

Acclimation temperature (°C)	Length of intestinal villus (mm)
	Heat stress for 0 h	Heat stress for 2 h	Heat stress for 6 h	Heat stress for 12 h
10	0.480 ± 0.038	0.387 ± 0.024	0.231 ± 0.031	-
15	0.393 ± 0.022	0.323 ± 0.011	0.274 ± 0.049	0.247 ± 0.028
20	0.466 ± 0.078	0.386 ± 0.016	0.312 ± 0.006	0.229 ± 0.022

Means followed by SD.