Fig. 5.

Fatty acid values of three Phaeodactylum tricornutum strains during six-months repeated-batch cultivation in flat panel outdoor bioreactors in Bergen, western Norway, with total fatty acid (TFA) content relative to the dry weight (DW) (A), eicosapentaenoic acid (EPA) content relative to DW (B) and EPA content relative to TFA (C). Values are average and standard deviation of measurement replicates (n = 2 and 3 for FA and DW values respectively). The three grey bars indicate interruptions of the cultivation process. After interruption (1) and (3), the position of the strains was rotated, and after (2) and (3), the panels were re-inoculated with backup cultures. Grey dotted, vertical lines indicate dilution of the cultures and black dotted lines mark the division of the cultivation period into three seasons; spring, summer and autumn.