Effects of alternate phases of fish oil and vegetable oil-based diets in Murray cod

Francis, David S., Turchini, Giovanni.M, Smith, Blair, Ryan, Stephen and De Silva, Sena 2009, Effects of alternate phases of fish oil and vegetable oil-based diets in Murray cod, Aquaculture research, vol. 40, no. 10, pp. 1123-1134.

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Title Effects of alternate phases of fish oil and vegetable oil-based diets in Murray cod
Author(s) Francis, David S.
Turchini, Giovanni.M
Smith, Blair
Ryan, Stephen
De Silva, Sena
Journal name Aquaculture research
Volume number 40
Issue number 10
Start page 1123
End page 1134
Total pages 12
Publisher Blackwell Science
Place of publication Oxford, England
Publication date 2009-07
ISSN 1355-557X
1365-2109
Keyword(s) circadian rhythms
fatty acids
feeding schedule
fish oil
lipo-compensatory growth
Maccullochella peelii peelii
Summary Fish oil (FO)- and canola oil (CO)-based diets were regularly alternated in a daily cycle (amCO: alternation of CO in the morning and FO in the afternoon, and pmCO: alternation of FO in the morning and CO in the afternoon) or in a series of weekly cycles (2W: alternation of 2 weeks on CO and 2 weeks on FO, 4W: alternation of 4 weeks on CO and 4 weeks on FO), over a 16-week period in juvenile Murray cod (Maccullochella peelii peelii). No significant differences were observed between any of the treatments in relation to the final weight. However, fish subjected to the 2W schedule were larger (P>0.05) than all other treatments (37.2 ± 0.30 vs. 34.3 ± 0.58 in the control treatment). Fish receiving the 2W treatment had a significantly lower total net disappearance of eicosapentaenoic acid 20:5n-3 (EPA) and docosahexaenoic acid 22:6n-3 (62.1% and 24.0% respectively) compared with the control treatment (fish continuously fed a blend of 50% FO and 50% CO). Likewise, Murray cod receiving the amCO daily schedule had a significantly lower total net disappearance of EPA in comparison with the CD and pmCO treatments. These data point towards the existence of cyclical mechanisms relative to fatty acid utilization/retention.
Language eng
Field of Research 070401 Aquaculture
Socio Economic Objective 830506 Unprocessed or Minimally Processed Fish
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2009
Copyright notice ©2009, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30020753

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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