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Article

Fatty Acid Profiles of Selected Microalgae Used as Live Feeds for Shrimp Postlarvae in Vietnam

1
Institute of Aquaculture, Nha Trang University, Nha Trang 57000, Vietnam
2
CSIRO Oceans & Atmosphere, Hobart, TAS 7000, Australia
3
CSIRO National Collections and Marine Infrastructure, Hobart, TAS 7000, Australia
4
CSIRO Agriculture & Food, Woorim, QLD 4507, Australia
5
Minh Phu Seafood Corporation, Cà Mau 98000, Vietnam
*
Author to whom correspondence should be addressed.
Academic Editors: Aires Oliva-Teles and Wilson Wasielesky
Aquac. J. 2021, 1(1), 26-38; https://doi.org/10.3390/aquacj1010004
Received: 25 August 2021 / Revised: 18 October 2021 / Accepted: 19 October 2021 / Published: 22 October 2021
The importance of microalgal lipids for the survival and growth of shrimp postlarvae has been recognized in a range of studies. Microalgae with fast growth rates and high levels of polyunsaturated fatty acids (PUFA) are considered vital to maximise production and minimise cost in shrimp larviculture. The lipid content and fatty acid composition of microalgae used in shrimp production varies substantially between the algal classes and species being used in Vietnam. This study aims to characterise microalgal lipid and fatty acid (FA) profiles and evaluate the most promising species under growth conditions that are most suitable for shrimp aquaculture. Here, we report that the highest lipid contents were obtained in the Haptophyta microalgae, Tisochrysis lutea and Isochrysis galbana, at 90.3 and 61.1 mg/g, respectively. In contrast, two of the most popular diatom species being used for shrimp larval cultivation in Vietnam, Thalassiosira pseudonana and T. weissflogii, displayed the lowest lipid contents at 16.1 mg/g. Other microalgal species examined showed lipid contents ranging from 28.6 to 55 mg/g. Eicosapentaenoic acid (EPA, 20:5ω3) ranged from 0.6 to 29.9% across the species, with docosahexaenoic acid (DHA, 22:6ω3) present at 0.01 to 11.1%; the two omega (ω)–3 long-chain (LC, ≥C20) LC-PUFA varied between the microalgae groups. Polar lipids were the main lipid class, ranging from 87.2 to 97.3% of total lipids, and triacylglycerol was detected in the range of 0.01 to 2.5%. Saturated fatty acids (SFA) and monounsaturated fatty acids (MUFA) increased and PUFA decreased with increasing growth temperatures. This study demonstrated the differences in the lipid contents and FA profiles across 10 microalgal species and the effect of the higher temperature growing conditions encountered in Vietnam. View Full-Text
Keywords: phytoplankton; polyunsaturated fatty acids; live feeds phytoplankton; polyunsaturated fatty acids; live feeds
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MDPI and ACS Style

Mai, T.D.; Lee-Chang, K.J.; Jameson, I.D.; Hoang, T.; Cai, N.B.A.; Pham, H.Q. Fatty Acid Profiles of Selected Microalgae Used as Live Feeds for Shrimp Postlarvae in Vietnam. Aquac. J. 2021, 1, 26-38. https://doi.org/10.3390/aquacj1010004

AMA Style

Mai TD, Lee-Chang KJ, Jameson ID, Hoang T, Cai NBA, Pham HQ. Fatty Acid Profiles of Selected Microalgae Used as Live Feeds for Shrimp Postlarvae in Vietnam. Aquaculture Journal. 2021; 1(1):26-38. https://doi.org/10.3390/aquacj1010004

Chicago/Turabian Style

Mai, Thao D., Kim J. Lee-Chang, Ian D. Jameson, Tung Hoang, Ngoc B.A. Cai, and Hung Q. Pham. 2021. "Fatty Acid Profiles of Selected Microalgae Used as Live Feeds for Shrimp Postlarvae in Vietnam" Aquaculture Journal 1, no. 1: 26-38. https://doi.org/10.3390/aquacj1010004

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