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Growth and lipid composition of phyllosomata of the southern rock lobster, Jasus edwardsii, fed enriched Artemia

journal contribution
posted on 2023-05-16, 15:29 authored by Nelson, MM, Crear, BJ, Nichols, PD, Ritz, DA
Newly hatched phyllosoma larvae of Jasus edwardsii were on-grown to stage V. Using triacylglycerol-rich marine oil nutrient sources and microalgae, Artemia were enriched with the major polyunsaturated fatty acids (PUFA) to ratios similar to that of wild-caught phyllosomata. Artemia enriched by different methods were fed to cultured phyllosomata. At each stage animals were counted, measured and sampled for lipid analyses. Survival was highest from stages II to III (62-86%), with mean total survival at 3-12%. From stages I to V larvae increased in mass (0.2-2.2 mg) and total length (2.1-5.8 mm), and decreased in total lipid. The major lipid class in all phyllosomata was polar lipid, followed by sterol, with no triacylglycerol detected. The main fatty acids were 18:1(n-9)c, 18:2(n-6), 16:0, 18:0, eicosapentaenoic acid [EPA; 20:5(n-3)], 18:1(n-7)c, arachidonic acid [AA; 20:4(n-6)] and docosahexaenoic acid [DHA; 22:6(n-3)]. On-grown phyllosomata had levels of AA and EPA similar to that of wild phyllosomata, but contained markedly lower levels of DHA. Strategies for enhancement of DHA levels will be needed for culture of rock lobster phyllosomata.

History

Publication title

Aquaculture Nutrition

Volume

10

Issue

4

Pagination

237-246

ISSN

1353-5773

Department/School

School of Natural Sciences

Publisher

Blackwell Publishing Ltd

Place of publication

Oxford, England

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - aquaculture not elsewhere classified

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