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Changes in oil content, lipid class and fatty acid composition of the microalga Chaetoceros calcitrans over different phases of batch culture

Miller, Matthew R., Quek, Siew-Young, Staehler, Kathrin, Nalder, Tim and Packer, Michael A. 2014, Changes in oil content, lipid class and fatty acid composition of the microalga Chaetoceros calcitrans over different phases of batch culture, Aquaculture research, vol. 45, no. 10, pp. 1634-1647, doi: 10.1111/are.12107.

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Title Changes in oil content, lipid class and fatty acid composition of the microalga Chaetoceros calcitrans over different phases of batch culture
Author(s) Miller, Matthew R.
Quek, Siew-Young
Staehler, Kathrin
Nalder, TimORCID iD for Nalder, Tim orcid.org/0000-0001-8748-7429
Packer, Michael A.
Journal name Aquaculture research
Volume number 45
Issue number 10
Start page 1634
End page 1647
Total pages 14
Publisher Wiley
Place of publication London, England
Publication date 2014-09
ISSN 1355-557X
1365-2109
Keyword(s) diatom
docosahexaenoic acid DHA
eicosapentaenoic acid EPA
FA biosynthesis
larval feeds
Summary  Abstract
The diatom Chaetoceros calcitrans is a microalgal species used as food for larva in aquaculture for many species worldwide. Chaetoceros calcitrans is an important source of omega 3 long chain (C ≥ 20) polyunsaturated fatty acids (n-3 LC PUFA), chiefly eicosapentaenoic acid (EPA, 20:5n-3). This article reports lipid content, lipid class composition and fatty acid profiles of each lipid class during the growth cycle of batch cultures of C. calcitrans. Total lipid content and the concentration of neutral lipid were highest in the late stationary growth phase (day 12). However, the amount of EPA was highest during the logarithmic growth phase (1.24 pg/cell on day 4). EPA was initially concentrated in the glycolipid fraction, but this fraction decreased during logarithmic growth, coinciding with the increase in neutral lipid. Docosahexaenoic acid (22:6n-3, DHA) (0.91 pg/cell) was reported as a major fatty acid (>10 mg/100 g) in all lipid classes on day 1. DHA was depleted quickly from the neutral lipid and glycolipid classes, but at a slower rate from the polar lipid fraction. This work confirms that C. calcitrans is a good source of lipid, in particular EPA, for larval and adult filter feeders in aquaculture.
Language eng
DOI 10.1111/are.12107
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30051807

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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Created: Thu, 04 Apr 2013, 13:44:03 EST

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