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The effect of graded concentrations of dietary DHA on growth, survival and tissue fatty acid profile of Senegal sole (Solea senegalensis) larvae during the Artemia feeding period

Citation

Villalta, M and Estevez, A and Bransden, MP and Bell, JG, The effect of graded concentrations of dietary DHA on growth, survival and tissue fatty acid profile of Senegal sole (Solea senegalensis) larvae during the Artemia feeding period, Aquaculture, 249, (1-4) pp. 353-365. ISSN 0044-8486 (2005) [Refereed Article]

DOI: doi:10.1016/j.aquaculture.2005.03.037

Abstract

We examined the effect of dietary docosahexaenoic acid (22:6n-3, DHA) on growth, survival, pigmentation and fatty acid composition of Senegal sole larvae using a dose-response design. From 3 to 35 days post-hatch (dph), larvae were fed live food (rotifers from 3 to 9 dph, Artemia nauplii from 5 to 35 dph) that had been enriched using one of four experimental emulsions containing four graduated concentrations of DHA and constant arachidonic acid (20:4n-6, ARA) and eicosapentaenoic acid (20:5n-3, EPA). Final proportions of DHA in the enriched Artemia nauplii were described as 'nil' (DHA-N, 0.0% total fatty acids, TFA), 'low' (DHA-L, 4.4% TFA), 'medium' (DHA-M, 7.7% TFA) or 'high' (DHA-H, 14.7% TFA). Significant differences among dietary treatments in larval length occurred at 20, 30 and 36 dph, and in dry weight at 20 and 30 dph, although there was no significant relationship between dietary DHA and growth. The stage of eye migration at 20 dph was significantly affected by dietary levels of DHA. No significant differences in survival were obtained. Tissue fatty acid concentrations reflected the corresponding dietary composition. Fish fed DHA-M and -H enriched nauplii tended to accumulate less lipid, mainly oleic acid (OA), in the carcass that might have caused the lower growth in length observed in DHA-H fish. We hypothesise that negligible amounts of dietary DHA required for normal development in Senegal sole larvae relate to a predominance of EPA rather than DHA in the benthic fauna which this flatfish consumes in the wild post-settlement. © 2005 Elsevier B.V. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Bransden, MP (Dr Matthew Bransden)
ID Code:37707
Year Published:2005
Web of Science® Times Cited:57
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2005-08-01
Last Modified:2006-04-10
Downloads:0

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