Effect of bioflocs on seafood quality

Devi Hermsen (Speaker), D.B. van de Waal (Contributor), S.A.J. Declerck (Contributor), Verdegem, M. (Contributor)

Activity: Talk or presentationOral presentationOther

Description

In a "nutritious pond" system, the incorporation of natural food elements into shrimp biomass may increase. This mesocosm study compared a Control diet containing fish oil and fishmeal, and a diet without these (low-H treatment). After 57 days, 12% of the feed input was metabolized into shrimp biomass, which did not differ between treatments. Control shrimp's, and total food web, HUFA content in the control tanks was twice as high than low-H. HUFA retention in the control was over ten-fold higher than Low-H tanks, pinpointing in situ de novo production of EPA, DHA and ARA. Among six food web compartments, the highest HUFA accumulation was observed in seston. Whether Low-H shrimp experienced a HUFA-deficient environment is not confirmed. Based on above, reducing fish oil and fishmeal in shrimp diets seems possible, but depends on the potential to canalize HUFA-containing algae in the seston into better accessible food web compartments.
Period8 Apr 201912 Apr 2019
Event title12th Asian Fisheries & Aquaculture Forum (AFAF): Transforming Asian Fisheries and Aquaculture for Sustainable Production and Nutrition
Event typeConference
LocationIloilo, Philippines