Single cell protein from methanotrophic bacteria as an alternative healthy and functional protein source in aquafeeds, a holistic approach in rainbow trout (Oncorhynchus mykiss) juveniles

Unvaccinated rainbow trout juveniles were purchased from Truchas
de Leiza SL (Leiza, Navarra, Spain), and transported to IRTA research
facilities in la R`apita (Tarragona, Spain). Trouts were acclimated during
two weeks in a 6 m3 tank connected to a water recirculation system
(IRTAmar™). After the end of the acclimation period, all fish (N = 720)
were individually measured and randomly distributed in 20,500-l tanks
(n = 30 fish per tank; 4 replicate tanks per diet) connected to an
IRTAmar™ unit with mechanical, biological filtration and UV water
treatment. At the beginning of the trial, rainbow trout juveniles
weighted 11.3 ± 0.2 g (mean ± standard deviation) body weight (BW)
and measured 9.0 ± 0.1 cm in standard length (SL).
The trial was divided in two different parts, a nutritional trial that
lasted 83 days during which the impact of experimental diets was
evaluated in terms of KPIs associated to growth and feed performance.
This was followed by a challenge trial with a pathogenic bacterium
(Aeromonas salmonicida subsp. salmonicida), the causative agent of
furunculosis, to evaluate the immunological competence of fish fed the
experimental diets (15 days).

SOMMAR Platfom

Leave a Reply