Competition between Dunaliella species at high salinity

The mass culture of Dunaliella salina for ?-carotene: from pilot plant to production plant

“…We do not understand the reasons for the differences between growth in the laboratory and ponds. Measurements of the penetration of light through the water column in ponds show high intensities of light relative to the laboratory (Moulton et al, 1987). The exchange of gases was possibly superior in the laboratory cultures due to the high surface-to-volume ratio, although the cultures were not stirred or aerated.…”

“…This encourages the prospect of semicontinuous or continuous harvesting. Laboratory experiments (Moulton et al, 1987) and certain experiments in pilot-plant ponds have demonstrated the feasibility of maintaining cultures under a regime of regular harvesting. In other experiments with semicontinuous harvesting in pilot plant ponds, the cultures have declined.…”

“…Verification of the applicability of the model came from laboratory experiments in which the actual yield of carotenoid was somewhat higher than predicted by the logistic relationship (Moulton et al, 1987).…”

The mass culture of Dunaliella viridis (Volvocales, Chlorophyta) for oxygenated carotenoids : laboratory and pilot plant studies

“…salina and D . viridis (Borowitzka et al, 1984 ;Moulton et al, 1987bMoulton et al, , 1988. At salinities (expressed as grams of the salts found in Hutt Lagoon brine • L -1 of water) above about 200 g • L -1 , D .…”

“…viridis was considered a `pest' because it appeared to compete with D . salina and reduce the yield of /3-carotene (Borowitzka et al, 1984(Borowitzka et al, , 1985Moulton et al, 1987b) . However, D .…”