Growth and fatty acid composition of Pacific oyster (Crassostrea gigas) spat fed a spray-dried freshwater microalga (Spongiococcum excentricum) and microencapsulated lipids

J Knauer; Paul C Southgate

doi:10.1016/S0044-8486(97)00056-2

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Growth and fatty acid composition of Pacific oyster (Crassostrea gigas) spat fed a spray-dried freshwater microalga (Spongiococcum excentricum) and microencapsulated lipids

Journal article

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Growth and fatty acid composition of Pacific oyster (Crassostrea gigas) spat fed a spray-dried freshwater microalga (Spongiococcum excentricum) and microencapsulated lipids

J Knauer and Paul C Southgate

Aquaculture, Vol.154(3-4), pp.293-303

1997

DOI: https://doi.org/10.1016/S0044-8486(97)00056-2

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Abstract

crassostrea gigas

oyster

spongiococcum excentricum

spray-dried alga

fatty acid

microcapsule

Pacific oyster (Crassostrea gigas) spat were fed for 28 days on either a 100% ration of spray-dried freshwater microalga Spongiococcum excentricum, or an 80% ration of S. excentricum and 20% gelatin-acacia microcapsules (GAM) containing various lipid sources. Replacement of S. excentricum with any lipid significantly increased the ash free dry weight (AFDW) of spat. GAM containing squid oil or mixtures of squid oil and either coconut oil, corn oil, or linseed oil produced spat with significantly higher AFDW than GAM containing vegetable oils only. Spat fed a live reference diet (Chaetoceros muelleri) had significantly higher AFDW than spat fed any of the S. excentricum/GAM-diets. There was no correlation between AFDW of spat and the energy content of GAM, however, AFDW was positively correlated with levels (% of total fatty acids) of the fatty acids 20:5n-3 and 22:6n-3 in GAM. The fatty acid profile of spat generally reflected that of the diet after 28 days and unfed spat retained high % levels of 20:5n-3 and 22:6n-3, indicating the importance of these fatty acids for spat growth.

Details

Title: Growth and fatty acid composition of Pacific oyster (Crassostrea gigas) spat fed a spray-dried freshwater microalga (Spongiococcum excentricum) and microencapsulated lipids
Authors: J Knauer (Author) - James Cook University
Paul C Southgate (Author) - James Cook University
Publication details: Aquaculture, Vol.154(3-4), pp.293-303
Publisher: Elsevier BV
Date published: 1997
DOI: 10.1016/S0044-8486(97)00056-2
ISSN: 0044-8486
Organisation Unit: School of Science and Engineering - Legacy; Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99449489902621
Output Type: Journal article

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