Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/10132
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: The conversion of linoleic acid and linolenic acid to longer chain polyunsaturated fatty acids by Tilapia (Oreochromis) nilotica in vivo
Authors: Olsen, Rolf E
Henderson, R James
McAndrew, Brendan
Contact Email: b.j.mcandrew@stir.ac.uk
Keywords: tilapia
polyunsaturated fatty acids
lipids
desaturation
diet
Issue Date: May-1990
Publisher: Springer
Citation: Olsen RE, Henderson RJ & McAndrew B (1990) The conversion of linoleic acid and linolenic acid to longer chain polyunsaturated fatty acids by Tilapia (Oreochromis) nilotica in vivo, Fish Physiology and Biochemistry, 8 (3), pp. 261-270.
Abstract: Tilapia (Oreochromis) nilotica were fed either a commercial diet containing 2.2% (n-3) and 0.5% (n-6) polyunsaturated fatty acids (PUFA), or a diet containing 1.0% methyl linoleate as the only PUFA. The fatty acid composition of tissue lipids generally reflected that of the diet. Fish from both dietary groups were injected intraperitoneally with 14C-labelled linoleic acid, 18:2 (n-6), or linolenic acid, 18:3 (n-3), and the distribution of radioactivity in tissue lipids examined. The conversion of both 18:2 (n-6) and 18:3 (n-3) to longer chain PUFA was lower in fish fed the commercial diet than in those fed the diet containing only 18:2 (n-6). Half of the radioactivity from both substrates recovered in liver polar lipids was present in C20 and C22 PUFA with fish maintained on the experimental diet. It is concluded that T. nilotica is capable of elongating and desaturating both 18:2 (n-6) and 18:3 (n-3), but that this conversion is suppressed by dietary longer chain PUFA.
Type: Journal Article
URI: http://hdl.handle.net/1893/10132
DOI Link: http://dx.doi.org/10.1007/BF00004465
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Holt Agricultural Research Station, Norway
University of Stirling
Aquaculture

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