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Environmental constraints on the lipid composition and metabolism of euphausiids:the case of Euphausia superba and Meganyctiphanes norvegica

Citation

Mayzaud, P and Albessard, E and Virtue, P and Boutoute, M, Environmental constraints on the lipid composition and metabolism of euphausiids:the case of Euphausia superba and Meganyctiphanes norvegica, Canadian Journal of Fisheries and Aquatic Sciences, 57, (3) pp. 91-103. ISSN 0706-652X (2000) [Refereed Article]


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Copyright Statement

Copyright 2000 NRC Canada

DOI: doi:10.1139/f00-181

Abstract

Antarctic (Euphausia superba) and northern krill (Meganyctiphanes norvegica) are characterised by largescale spatial distributions. Euphausia superba is limited to the Southern Ocean, while M. norvegica is present from the Arctic Ocean to the Mediterranean Sea. Euphausia superba structural lipids showed little mesoscale variability. Specific differences between phosphatidylcholine and phosphatidylethanolamine fatty acid composition exceeded variability related to sampling stations. On a larger scale (Southern Ocean), fatty acid composition of both total polar lipids and phosphatidylcholine confirmed the reduced level of regional variability. Similar comparisons between female M. norvegica collected at two extreme sites in terms of temperature regime (Kattegat and Ligurian Sea) during two seasons (spring–summer and fall–winter) suggested a more complex picture. Levels of phosphatidylethanolamine, lysophosphatidylcholine, and diphosphatidylglycerol showed significant differences between sites. During spring– summer, a lower content of phosphatidylethanolamine and lysophosphatidylcholine was observed for the Ligurian Sea population. Fatty acid composition of total polar lipids was significantly different at both sites. Comparisons between spring–summer populations at both sites showed higher percentages of 22:6n–3 and a lower content in saturated and monoenoic acids for the Ligurian Sea, suggesting some degree of adaptation to temperature regime. 103

Item Details

Item Type:Refereed Article
Keywords:lipids, krill
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:Virtue, P (Associate Professor Patti Virtue)
ID Code:90446
Year Published:2000
Deposited By:IMAS Research and Education Centre
Deposited On:2014-04-04
Last Modified:2014-07-02
Downloads:0

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