Tiny but Fatty: Lipids and Fatty Acids in the Daubed Shanny ( Leptoclinus Maculatus ), a Small Fish in Svalbard Waters

The seasonal dynamic of lipids and their fatty acid constituents in the lipid sac and muscles of pelagic postlarval Leptoclinus maculatus , an ecologically important fish species in the Arctic food nets, in Kongsfjord, Svalbard waters was studied. The determination of the qualitative and quantitativ...

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Bibliographic Details
Published in:Biomolecules
Main Authors: Svetlana A. Murzina, Svetlana N. Pekkoeva, Ekaterina A. Kondakova, Zinaida A. Nefedova, Kseniia A. Filippova, Nina N. Nemova, Alexei M. Orlov, Jorgen Berge, Stig Falk-Petersen
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2020
Subjects:
lipids
fatty acids
leptoclinus maculatus
ontogenesis
adaptations
trophic nets
arctic
Microbiology
QR1-502
Arctic
Kongsfjord
Svalbard
Daubed shanny
Kongsfjord*
Leptoclinus maculatus
Online Access:https://doi.org/10.3390/biom10030368
https://doaj.org/article/b5d118c13c5d4fb0aef4e4227cfa906d
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Summary:The seasonal dynamic of lipids and their fatty acid constituents in the lipid sac and muscles of pelagic postlarval Leptoclinus maculatus , an ecologically important fish species in the Arctic food nets, in Kongsfjord, Svalbard waters was studied. The determination of the qualitative and quantitative content of the total lipids (TLs), total phospholipids (PLs), triacylglycerols (TAGs), cholesterol (Chol), cholesterol esters (Chol esters) and wax esters was analyzed by TLC, the phosphatidylserine (PS), phosphatidylethanolamine (PE), phosphatidylinositol (PI), phosphatidylcholine (PC), lysophosphatidylcholine (LPC) and sphingomyelin (SM) were determined by HPLC, and fatty acids of total lipids using GC. The lipid sac is a system of cavities filled with lipids, and it is not directly connected to organs of the digestive system. The wall’s inner layer is a multinuclear symplast that has a trophic function. The results provide additional knowledge on the role of lipids in the biochemical and physiological adaptation of fish to specific environments and clarify the relationship between fatty acids and the food specialization of postlarvae. Analysis of the fatty acid (FA) profile of TLs in the muscles and lipid sac of daubed shanny pelagic postlarvae showed it to be tissue- and organ-specific, and tightly associated with seasonal variations of environmental factors (temperature conditions and trophic resources).

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