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Title: Effects of dietary docosahexaenoic acid sources, microalgae meal and oil, on growth, fatty acid composition and docosahexaenoic acid retention of orange‐spotted grouper, Epinephelus coioides
Authors: Meng‐Chou Lee
Li‐Chao Zhuo
Yu‐Hung Lin
Contributors: 國立臺灣海洋大學:水產養殖學系
Date: 2017-06
Issue Date: 2018-09-28T08:02:54Z
Publisher: Aquaculture Research
Abstract: Abstract: This study evaluated the effects of Aurantiochytrium spp. microalgae meal and oil as dietary docosahexaenoic acid (DHA) sources on the growth, fatty acid composition and DHA retention of orange‐spotted grouper, Epinephelus coioides. Dietary fish oil was replaced with microalgae meal or oil to provide an equal amount of DHA as a fish oil‐containing basal diet. In total, three experimental diets were fed to triplicate groups of fish (initial wt: 8.48 ± 0.06 g) in a recirculating system for 8 weeks. The weight gain and feed efficiency of the fish did not differ significantly among the experimental diets. The fatty acid composition of the whole body of the fish generally reflected the composition of their diet. The concentration of eicosapentaenoic acid in the whole body was higher in the fish fed the fish meal control diet than in those fed the two experimental diets The fish fed the control diet and those fed the diet containing microalgae oil exhibited higher DHA concentrations than did the fish fed the diet containing microalgae meal. The whole‐body DHA retention was the highest in the fish fed the diet with microalgae oil, followed by the fish fed the control diet. The lowest whole‐body DHA retention was observed in the fish fed the diet containing microalgae meal. The results suggested that the oil from Aurantiochytrium spp. microalgae can be used as DHA source for the grouper. DHA utilization by the fish was higher when the diet was supplemented with microalgae oil than with dry microalgae meal.
Relation: 49(1) pp.30-35
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50294
Appears in Collections:[水產養殖學系] 期刊論文

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