Commercial production of trout can easily be improved with the use of oregano essential oils in trout feed. A commercial trial was conducted by a reputable international aqua feed producer from Denmark that produces rainbow trout feed.
Rainbow trout (Oncorhynchus mykiss) were fed with either standard control feed or a similar feed containing Orego-Stim® Aquatract at 550 ppm. The length of the trial was 49 days and the fish were reared in a Danish trout farm using a flow-through system, with average water temperatures of 9.4 °C.
Results revealed that trout fed with feed containing Orego-Stim® Aquatract showed improvements in average weight gain by 9.4[percent], total weight gain by 14.9[percent] and feed efficiency by 3.2[percent].
This ultimately resulted in a Return-On-Investment (ROI) ratio of 8.6 : 1, which meant that for every €1 spent on Orego-Stim® Aquatract, producers gained an additional profit of €8.60 in return on top of usual profits, due to the additional increase in liveweight gain.