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- Title
Effects of dietary macroalgae meal and lipid source on growth performance and body wall fatty acid composition of sea cucumber <italic>Apostichopus japonicus</italic>.
- Authors
Wen, Bin; Sun, Yong‐Jun; Gao, Qin‐Feng; Dong, Shuang‐Lin; Chen, Zai‐Zhong; Gao, Jian‐Zhong
- Abstract
Abstract: A 70‐day experiment was conducted to examine the effects of different macroalgal meals and lipid sources on growth, body wall composition and fatty acid (FA) profile of sea cucumber <italic>Apostichopus japonicus</italic>. Two macroalgal meals including <italic>Sargassum muticum</italic> (SM) and <italic>Gracilaria lemaneiformis</italic> (GL) and two lipid sources including fish oil (FO) and vegetable oil (VO) were formulated into four diets, i.e., <italic>S. muticum</italic> and fish oil (SF), <italic>S. muticum</italic> and vegetable oil (SV), <italic>G. lemaneiformis</italic> and fish oil (GF) and <italic>G. lemaneiformis</italic> and vegetable oil (GV). The results showed that the specific growth rates (SGR) of <italic>A. japonicus</italic> fed diets containing SM were significantly higher than those fed diets containing GL. No significant differences in SGR between the FO‐based and VO‐based groups were observed. Similar results were observed in the body wall lipid content. Most body wall FAs changed to resemble the dietary FA proportions because of the dietary effect. Concentrations of 20:4<italic>n</italic>‐6 of the SF and GF groups were significantly lower than the SV and GV groups, while levels of 20:5<italic>n</italic>‐3 and 22:6<italic>n</italic>‐3 were significantly higher than the SV and GV groups. The <italic>n</italic>‐3/<italic>n</italic>‐6 polyunsaturated fatty acids (PUFA) ratios of the SF and GF groups were significantly higher than the SV and GV groups. Moreover, the SF group had significantly higher 20:5<italic>n</italic>‐3 and 22:6<italic>n</italic>‐3 contents and <italic>n</italic>‐3/<italic>n</italic>‐6 PUFAs ratio than the GF group. These findings reveal that the SF diet can show beneficial effects on both growth performance and body wall <italic>n</italic>‐3 PUFAs content of <italic>A. japonicus</italic>.
- Subjects
PAGRUS; ACANTHOPAGRUS; FISHERIES; AQUACULTURE; FISH industry; PHYSIOLOGY
- Publication
Aquaculture Research, 2018, Vol 49, Issue 2, p776
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.13508