Figure 3.

(a) Free fatty acids (FFAs) released from algae biomass after digestion, expressed as % of the total fatty acid content measured as fatty acid methyl esters (%FAMEs), and (b) expressed on dry algae basis. FFA levels within one graph are significantly different when they are not labeled with a common lowercase letter. Total fatty acid levels in the right graph are significantly different when they are not labeled with a common uppercase letter. A Tukey multiple comparison test was always used to compare values for different algae types.