the optimal culture media for crude protein and polyunsaturated fatty acid production from isochrysis galbana and nanochloropsis oculata for livestock and aquatic species nutrition

This study aimed to investigate the effect of different culture mediums based on the walne medium on the growth rate, chemical composition, and fatty acid (fa) profile in i. galbana and n. oculata. this experiment was done in a factorial design with two culture media (walne and modified walne media) and two microalgae species, including i. galbana and n. oculata. the results showed that the modified culture medium increased total and daily fresh and dried biomass production of i. galbana and n. oculata. modified culture media increased crude fat (cf) and crude protein (cp) content and total and daily lipid production in both the studied species. however, in both the studied culture mediums, n. oculata had higher growth and production performance compared to i. galbana. modified growth media also affects the fa profiles of the studied microalgae species. total saturated and unsaturated fa content was not influenced by the growth medium but modified media increased poly unsaturated fa (pufa) at the expense of mono unsaturated fa (mufa). omega- 3 fa content (linolenic acid, eicosapentaenoic acid (epa), docosahexaenoic acid (dha)) was increased as a result of the medium modification in both species (p<0.05). however, linoleic acid content was affected differently in i. galbana and n. oculata. the linoleic acid concentration was reduced in modified medium grown n. oculata but increased in i. galbana (p<0.05). palmitic acid and stearic acid contents were also decreased in both of the studied species in the modified medium (p<0.05). this study develops microalgal cultivation using a modified walne medium for higher cp, cf, epa, dha contents, the ratio of omega3: omega6 fa, and biomass production in n. oculata and i. galbana microalgae.

the optimal culture media for crude protein and polyunsaturated fatty acid production from isochrysis galbana and nanochloropsis oculata for livestock and aquatic species nutrition

this study aimed to investigate the effect of different culture mediums based on the walne medium on the growth rate, chemical composition, and fatty acid (fa) profile in i. galbana and n. oculata. this experiment was done in a factorial design with two culture media (walne and modified walne media) and two microalgae species, including i. galbana and n. oculata. the results showed that the modified culture medium increased total and daily fresh and dried biomass production of i. galbana and n. oculata. modified culture media increased crude fat (cf) and crude protein (cp) content and total and daily lipid production in both the studied species. however, in both the studied culture mediums, n. oculata had higher growth and production performance compared to i. galbana. modified growth media also affects the fa profiles of the studied microalgae species. total saturated and unsaturated fa content was not influenced by the growth medium but modified media increased poly unsaturated fa (pufa) at the expense of mono unsaturated fa (mufa). omega- 3 fa content (linolenic acid, eicosapentaenoic acid (epa), docosahexaenoic acid (dha)) was increased as a result of the medium modification in both species (p<0.05). however, linoleic acid content was affected differently in i. galbana and n. oculata. the linoleic acid concentration was reduced in modified medium grown n. oculata but increased in i. galbana (p<0.05). palmitic acid and stearic acid contents were also decreased in both of the studied species in the modified medium (p<0.05). this study develops microalgal cultivation using a modified walne medium for higher cp, cf, epa, dha contents, the ratio of omega3: omega6 fa, and biomass production in n. oculata and i. galbana microalgae.