Table 2. Mean values ± SD (in μm) of cell shape and volume, SGBs number, size, total volume per cell and relative density (in g cm^-3) for C. okenii.

		INC	Lake
Cell morphology	Length	9.36 ± 0.51	9.91 ± 1.73
	Width	3.35 ± 0.10	6.33 ± 0.38
	Volume	69.90 ± 12.47	207.66 ± 40.70
SGBs	Number	5 ± 1	6 ± 2
	Radius	0.29 ± 0.12	0.40 ± 0.08
	VSGBs/Vcell	0.013 ± 0.006	0.008 ± 0.003
Density	+ SGBs	1.055 ± 0.004	1.052 ± 0.001
	- SGBs	1.000 ± 0.038	1.029 ± 0.007