Biochemical composition of Hediste diversicolor (OF Müller, 1776) (Annelida: Nereidae) reared on different types of aquaculture sludge

Introduction Sustainable growth of the salmon aquaculture industry is highly dependent on availability new feed resources as well improved management and utilization waste streams from production. Polychaetes are capable recapturing recycling valuable biomolecules contained in sludge at same time constitute a possible resource for aquafeeds. Material methods In this study, potential Hediste diversicolor (OF Müller, 1776) to recover nutrients energy was evaluated. Hereby, effect two different diets, smolt post-smolt sludge, levels polychaete growth, biochemical elemental composition assessed. Results discussion Survival ranged 80-90%, independent treatment. Specific rates highest were significantly higher than lowest not affected by type diet. Similarly, total lipid fatty acid content polychaetes positively correlated with level while diet had limited effect. Fatty reflected levels: both groups, lower showed percentage saturated acids; monounsaturated acids increased supply sludge-fed group fed polyunsaturated increasing levels. Neither nor protein amino polychaetes. conclusion, H. could be successfully cultivated rich proteins lipids essential acids. The species can considered promising candidate types side aquaculture.