|Appears in Collections:||Aquaculture Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Recent developments in the essential fatty acid nutrition of fish|
|Authors:||Sargent, John R|
Bell, J Gordon
Tocher, Douglas R
Essential fatty acid
|Citation:||Sargent JR, Bell JG, McEvoy L, Tocher DR & Estevez A (1999) Recent developments in the essential fatty acid nutrition of fish, Aquaculture, 177 (1-4), pp. 191-199.|
|Abstract:||Because of competitive interactions in the metabolism of polyunsaturated fatty acids, tissue and bodily requirements for each of the three dietary essential fatty acids in marine fish, 22:6n-3, 20:5n-3 and 20:4n-6, cannot be meaningfully considered in isolation. Rather, it is necessary to consider requirements in relative as well as absolute amounts, i.e. in terms of the ratio of 22:6n-3 : 20:5n-3 : 20:4n-6. This is illustrated by recent research in our laboratories which has suggested that the optimal dietary ratio of 22:6n-3 : 20:5n-3 in sea bass larvae is circa 2:1 with the optimal dietary ratio of 20:5n-3 : 20:4n-6 being circa 1:1. The optimal dietary ratio of 22:6n-3 : 20:5n-3 in turbot and halibut larvae is similarly circa 2:1 but the optimal dietary ratio of 20:5n-3 : 20:4n-6 in these species is 10:1 or greater. In addition, studies with salmon parr point to dietary 18:3n-3 and 18:2n-6 being important in determining the optimal tissue ratio of 20:5n-3 : 20:4n-6 for successful parr - smolt transition. We deduce that differences in essential fatty acid requirements for different species of fish reflect different dietary and metabolic adaptations to different habitats, and consider how such knowledge can be exploited to develop improved diets for fish, especially in their early stages of development.|
|Rights:||Published in Aquaculture by Elsevier. Aquaculture, Volume 177, Issues 1-4, July 1999, pp. 191 - 199; This is the peer reviewed version of this article.; NOTICE: this is the author’s version of a work that was accepted for publication in Aquaculture. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquaculture, VOL 177, ISSUE 1-4, July 1999. DOI 10.1016/S0044-8486(99)00083-6|
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