Biochemical Composition and Fatty Acid Profile of the Green Alga Ulva reticulata

2007 ◽  
Vol 3 (1) ◽  
pp. 26-31 ◽  
Author(s):  
Annian Shanmugam ◽  
Chendur Palpandi
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Green Alga ◽  
Biochemical Composition

scholarly journals Investigation of Growth, Lipid Productivity, and Fatty Acid Profiles in Marine Bloom-Forming Dinoflagellates as Potential Feedstock for Biodiesel

2020 ◽  
Vol 8 (6) ◽  
pp. 381
Author(s):  
Steven Jingliang Xu ◽  
Kam-Chau Wu ◽  
Sophie Cheuk-Yan Chan ◽  
Yiu-Hung Yau ◽  
Kin-Ka Chan ◽  
...  
Keyword(s):  
Growth Rate ◽  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Green Alga ◽  
Algal Bloom ◽  
Harmful Algal Bloom ◽  
Total Lipid Content ◽  
Lipid Productivity ◽  
Biodiesel Production ◽  
Significant Difference

Microalgae-based biodiesel is increasingly recognized as an alternative to crop-based biodiesel. In this study, 10 local strains of dinoflagellates collected from Hong Kong waters, including a monoculture and field sample of Scrippsiella sp. isolated from an algal bloom, were evaluated against the performance of green alga Tetraselmis suecica. The specific growth rate, biomass production, lipid productivity, and fatty acid profile were investigated. The total lipid content of isolated strains ranged from 16.2% to 32.2% of the total dry biomass, whereas palmitic acid (C16:0) and docosahexaenoic acid (DHA, C22:6n3) were dominant in the fatty acid profile. Scrippsiella sp. has a high lipid productivity (47.3 mg/L/day) and fatty acid methyl esters (FAME) content (55.2–73 mg/g dry weight (dw)), which were comparable to that in green alga T. suecica. Further, monoculture and field sampled blooming Scrippsiella sp. showed no significant difference in most parameters, suggesting the possibility of harvesting a natural algal bloom population as a mitigation strategy to harmful algal bloom and to use as biodiesel feedstock. Overall, dinoflagellate species showed a slower growth rate (0.04–0.57 day−1) than most compared species (0.07–1.34 day−1), likely due to a large genome size and low chlorophyll to carbon ratio. Notably, most investigated dinoflagellates were not ideal for mass biodiesel production due to the low growth rate and lipid productivity. However, a high level of polyunsaturated fatty acids (PUFA) in dinoflagellates are prospective for further studies in other biotechnological applications. Though effectively harvesting algal blooming biomass can be complex, it can be further explored as a strategy for algal bloom mitigation and potentially creating values at the advantage of natural bloom when applying harvested biomass for biodiesel and bioactive compounds extraction.

scholarly journals Biochemical composition and fatty acid profile of gonads from wild and cultured Shortfin corvina (Cynoscion parvipinnis) during the early maturation stage

2017 ◽  
Vol 69 (3) ◽  
pp. 491-501 ◽  
Author(s):  
Mayra González-Félix ◽  
Perla Urquidez-Bejarano ◽  
Martin Perez-Velazquez ◽  
Reina Castro-Longoria ◽  
Celia Vazquez-Boucard
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Biochemical Composition ◽  
Gulf Of California ◽  
Gonadosomatic Index ◽  
Wild Fish ◽  
Maturation Stage ◽  
Human Consumption ◽  
Early Maturation ◽  
Cultured Fish

Cynoscion parvipinnis is an important fisheries resource of the Gulf of California used locally for human consumption. Its aquaculture potential has recently been demonstrated, and cultured organisms are already available. In this study, the gonadal developmental stage, proximate composition, fatty acid profile and other biochemical and biological indices of wild and cultured fish were characterized. A total of 80 fish, 30 cultured (15 female and 15 male) and 50 wild (31 female and 19 male), captured in November at Santa Rosa, Sonora, Mexico, were analyzed. Histological analyses of the gonads showed that 100% of the wild and cultured fish were at an early maturation stage. Wild fish had greater body weight, total length and gonadosomatic index. Cultured female fish (19.64%) possessed a slightly higher protein content in their gonads than wild females (17.11%), whereas males had similar values (14.00 and 14.83%). Cultured females (10.85%) and males (20.48%) had a significantly greater crude fat content than wild fish (female: 2.05%, male: 11.05%). Palmitic acid was the most abundant fatty acid (FA), ranging from 128.58-164.84 mg of 16:0 g-1 of gonad wet weight. After 16:0, highly unsaturated FAs like DHA, ARA and EPA were the major FA in gonadal tissue; n-3 FAs were quantitatively higher than n-6 FAs, while the n-3/n-6 ratios ranged from 2.08-2.81. In general, the biochemical composition of the gonad of wild and cultured organisms at an early maturation stage was quite similar. These data may serve as indicators of dietary requirements for a maturation diet for broodstock culture.

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