Restoration of EPA and DHA in rainbow trout (Oncorhynchus mykiss) using a finishing fish oil diet at two different water temperatures
Codabaccus, MB and Ng, W-K and Nichols, P and Carter, CG, Restoration of EPA and DHA in rainbow trout (Oncorhynchus mykiss) using a finishing fish oil diet at two different water temperatures, Food Chemistry, 141, (1) pp. 236-244. ISSN 0308-8146 (2013) [Refereed Article]
Feeding fish a fish oil finishing diet (FOFD) after grow-out on vegetable oil diet is one strategy to restore
eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) levels. We investigated restoration of EPA
and DHA in rainbow trout fed a FOFD preceded by a grow-out period on 50% or 75% palm fatty acid distillate
(PFAD) diets at optimal (15 C) or elevated (20 C) water temperatures. Using the FOFD restored
EPA and DHA in fillet and whole carcass of fish previously fed either 50% PFAD diet from 85% to 98%
or 75% PFAD from 66% to 93% of values obtained for fish fed FO diet throughout. Water temperature
did not influence EPA and DHA restoration. Growing rainbow trout with diets where FO was replaced
by either 50% or 75% PFAD followed by a FOFD reduced FO usage by around 30% and 44% at 15 C, respectively, and 32% and 48% at 20 C, respectively.
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Finishing diet, Fish oil, Palm fatty acid distillate, <i>Oncorhynchus mykiss</i>