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Influences of Dietary n-3 Long Chain PUFA on Body Concentrations of 20:5n-3, 22:5n-3 and 22:6n-3 in Larvae of a Marine Teleost Fish from Australian Waters, the Striped Trumpeter (Latris lineata)

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Bransden, MP, Dunstan, GA, Battaglene, SC, Cobcroft, JM, Morehead, DT, Kolkovski, S and Nichols, PD 2004 , 'Influences of Dietary n-3 Long Chain PUFA on Body Concentrations of 20:5n-3, 22:5n-3 and 22:6n-3 in Larvae of a Marine Teleost Fish from Australian Waters, the Striped Trumpeter (Latris lineata)' , Lipids, vol. 39, no. 3 , pp. 215-222 , doi: 10.1007/s11745-004-1222-6.

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Abstract

We determined the effect of dietary long-chain
(≥C20) PUFA (LC-PUFA), 20:5n-3 and 22:6n-3, on larval striped
trumpeter (Latris lineata) biochemistry through early development
and during live feeding with rotifers (Brachionus plicatilis). Rotifers
were enriched using seven experimental emulsions formulated
with increasing concentrations of n-3 LC-PUFA, mainly
20:5n-3 and 22:6n-3. Enriched rotifer n-3 LC-PUFA concentrations
ranged from 10–30 mg/g dry matter. Enriched rotifers were
fed to striped trumpeter larvae from 5 to 18 d post-hatch (dph) in
a short-term experiment to minimize gross deficiency symptoms
such as poor survival that could confound results. No relationships
were observed between larval growth or survival with dietary
n-3 LC-PUFA at 18 dph. The larval FA profiles generally reflected
those of the rotifer diet, and significant positive regressions
were observed between most dietary and larval FA at 10, 14, and
18 dph. The major exception observed was an inverse relationship
between dietary and larval 22:5n-3. The presence of 22:5n-3
in elevated amounts when dietary 22:6n-3 was depressed suggests
that elongation of 20:5n-3 may be occurring in an attempt
to raise body concentrations of 22:6n-3. We hypothesize that accumulation
of 22:5n-3 might be an early indicator of 22:6n-3 deficiency
in larval fish that precedes a reduction in growth or survival.
A possible role of 22:5n-3 as a biochemical surrogate for
22:6n-3 is discussed.

Item Type: Article
Authors/Creators:Bransden, MP and Dunstan, GA and Battaglene, SC and Cobcroft, JM and Morehead, DT and Kolkovski, S and Nichols, PD
Journal or Publication Title: Lipids
ISSN: 0024-4201
DOI / ID Number: 10.1007/s11745-004-1222-6
Additional Information:

The original publication is available at www.springerlink.com

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