Wild-caught blacklip (Haliotis rubra) and greenlip (Haliotis laevigata) abalone fed a formulated feed were held from spent to gravid condition at 14 or 18°C. Half the gravid animals were induced to spawn (using heated UV-irradiated seawater) and the remainder left untreated. All animals were then killed and samples of foot, digestive gland (DG) and gonad analyzed for lipid and fatty acid (FA) composition, as was the feed. The feed contained 5% lipid, of which the major FA were 18:2n-6 (27%), 18:1n-9 (20%) and 16:0 (16%). The lipid content of each tissue was similar for both species, ranging from 4-6%, 8-9%, 14-15%, and 30-32% in the foot, testis, DG and ovary, respectively. Each tissue had a different FA signature, with the foot, testis and ovary characterized by elevated levels of 20:4n-6 (arachidonic acid-ARA), 20:5n-3 (eicosapentaenoic acid-EPA) and 18:2n-6 (linoleic acid-LA), respectively. The proportions of LA and EPA in the DG were intermediate between those of the testis and ovary. There was no change in the lipid or fatty acid composition of blacklip or greenlip tissues in response to the two culture temperatures. Likewise, these compositions did not appear to differ between tissues from spent and gravid individuals. Tissue FA profiles from abalone fed a formulated feed are compared to those from macroalgal feeding trials to determine if the formulated feed can be further improved. © 2004 Elsevier B.V. All rights reserved.

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:	Grubert, MA (Mr Mark Grubert)
Author:	Ritar, AJ (Associate Professor Arthur Ritar)
ID Code:	31460
Year Published:	2004
Web of Science® Times Cited:	25
Deposited By:	TAFI - Marine Research Laboratory
Deposited On:	2004-08-01
Last Modified:	2005-04-06
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