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

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...

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Bibliographic Details
Main Authors: David Francis, Giovanni Turchini, B Smith, S Ryan, S De Silva
Format: Other Non-Article Part of Journal/Newspaper
Language:unknown
Published: 2009
Subjects:
Uncategorized
circadian rhythms
fatty acids
feeding schedule
fish oil
lipo-compensatory growth
Maccullochella peelii peelii
Science & Technology
Life Sciences & Biomedicine
Fisheries
FATTY-ACID-COMPOSITION
SALMO-SALAR L
MACCULLOCHELLA-PEELII-PEELII
MIXED FEEDING SCHEDULES
FRESH-WATER FISH
ATLANTIC SALMON
LIPID SOURCE
WHOLE-BODY
SENSORY CHARACTERISTICS
NUTRIENT DIGESTIBILITY
Atlantic salmon
Salmo salar
Online Access:http://hdl.handle.net/10536/DRO/DU:30020753
https://figshare.com/articles/journal_contribution/Effects_of_alternate_phases_of_fish_oil_and_vegetable_oil-based_diets_in_Murray_cod/21047032
Description
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.

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