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Effect of dietary 22:6n-3 on growth, survival and tissue fatty acid profile of striped trumpeter (Latris lineata) larvae fed enriched Artemia

Citation

Bransden, MP and Battaglene, SC and Morehead, DT and Dunstan, GA and Nichols, PD, Effect of dietary 22:6n-3 on growth, survival and tissue fatty acid profile of striped trumpeter (Latris lineata) larvae fed enriched Artemia, Aquaculture, 243, (1-4) pp. 331-344. ISSN 0044-8486 (2005) [Refereed Article]

DOI: doi:10.1016/j.aquaculture.2004.11.002

Abstract

The effect of dietary 22:6n-3 (docosahexaenoic acid, DHA) on growth and survival was determined in striped trumpeter during metamorphosis and the Artemia-feeding period (16-36 days posthatch, dph). Artemia were enriched on one of five experimental emulsions that contained graduated concentrations of DHA and constant 20:4n-6 (arachidonic acid, ARA). We also compared larval performance using a commercial enrichment product high in n-3 PUFA. Final DHA concentrations in Artemia enriched on the experimental emulsions ranged from 0.1-20.8 mg/g DM, while Artemia fed the commercial product had 18.2 mg DHA/g DM. Each of the six diets was fed to larvae in four replicate 300-l tanks. Standard length (range 10.0-11.2 mm) and dry weight (range 1.6-2.5 mg) of larvae at the end of the experiment were directly related to dietary DHA, with the highest growth recorded in the experimental diet with the greatest concentration of DHA (20.8 mg/g DM). Survival at 36 dph was not influenced by dietary DHA and ranged from 20-44%. Mortality increased noticeably, regardless of dietary treatment, when larvae attained a standard length of approximately 9.5 mm. Mortality was related to a nocturnal behaviour where larvae would migrate to the tank bottom during the dark phase. Fatty acid profiles of the larvae were generally correlated to dietary fatty acids. Dietary DHA was found to be important in larval striped trumpeter growth, where enhanced growth probably shortened the critical period of metamorphosis and the window where nocturnal downward migration and mortality occurred. © 2004 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)
Author:Battaglene, SC (Associate Professor Stephen Battaglene)
Author:Morehead, DT (Dr David Morehead)
ID Code:35316
Year Published:2005
Web of Science® Times Cited:35
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2005-08-01
Last Modified:2011-09-20
Downloads:0

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