The fatty acid concentration and composition on the growth of three cultured microalgae species

Abstract

Microalgae contain various types of essential fatty acid that functional in enhancing the growth and development of juvenile zooplankton. Three microalgae species had been culture with controlled condition and the culture method was inoculated with f/2 medium. The growth of microalgae culture affects the composition and component of fatty acid content. Fatty acid content in the analysis differs between microalgae species and across the growth phases due to different in microalgae strains, culture conditions and relative distribution at major lipid classes. The highest specific growth rate was dominated by Dunaliella sp. followed by Rhodomonas sp. and Chlorella sp. with 0.41 ind.d- 1 , 0.22 ind.d- 1 and 0.20 ind.d- 1 value respectively. On the other hand, the highest cell density dominated by Chlorella sp. followed by Rhodomonas sp. and Dunaliella sp. Among the three species studied, the highest fatty acid contents dominated by Rhodomonas sp. where it displayed the highest total fatty acid contents ( l 075.578 pg celr 1 ) in early log (EL) phase followed with Dunaliella sp. and Chiarella sp. In n-3 and n-6 fatty acids, Rhodomonas sp. also high in quantity across phases except in late log (LL) phase where the phases dominated by Chlorella sp. The fatty acids from polyunsaturated fatty acid (PUF A) division play main role in fatty acid contents as the highest contributor to fatty acid contents were from PUF A. The results obtained were significant in all microalgae species across four phases (p < 0.05).