Fatty Acid Composition of Euphausia superba, Thysanoessa macrura and Euphausia crystallorophias Collected from Prydz Bay, Antarctica

The information of trophic relationship is important for studying the Southern Ocean ecosystems. In this study, three dominant krill species, Euphausia superba, Thysanoessa macrura and Euphausia crystallorophias, were collected from Prydz Bay, Antarctica, during austral summer of 2009/2010. The comp...

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Bibliographic Details
Published in:Journal of Ocean University of China
Main Authors: Yang Guang, Li Chaolun, Wang Yanqing
Format: Article in Journal/Newspaper
Language:English
Published: 2016
Subjects:
Fatty Acid
Krill
Prydz Bay
Euphausia Superba
Euphausia Crystallorophias
Thysanoessa Macrura
Austral
Southern Ocean
Antarc*
Antarctica
Euphausia superba
Thysanoessa macrura
Online Access:http://ir.qdio.ac.cn/handle/337002/131079
https://doi.org/10.1007/s11802-016-2791-5
Description
Summary:The information of trophic relationship is important for studying the Southern Ocean ecosystems. In this study, three dominant krill species, Euphausia superba, Thysanoessa macrura and Euphausia crystallorophias, were collected from Prydz Bay, Antarctica, during austral summer of 2009/2010. The composition of fatty acids in these species was studied. E. superba and T. macrura showed a similar fatty acid composition which was dominated by C14:0, C16:0, EPA (eicosapentenoic acid) and DHA (de-cosahexenoic acid) while E. crystallorophias showed higher contents of C18:1(n-9), C18:1(n-7), DHA and EPA than the former two. Higher fatty acid ratios of C18:1(n-9)/18:1(n-7), PUFA (polyunsaturated fatty acid)/SFA (saturated fatty acid), and 18PUFA/16PUFA indicated that E. crystallorophias should be classified as a typical omnivore with a higher trophic position compared with E. superba and T. macrura.

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