Marine By-Products Tested as Feed for Almaco Jack Seriola rivoliana and Their Effect on Fatty Acids and Sterols in Different Tissues

Marine by-products can compose up to 70% of the total weight products from fisheries, most which are discarded. However, these rich in highly unsaturated fatty acids that not synthetized by marine animals produced aquaculture. Here, we used three (shrimp head, Catarina scallop viscera, and Pen shell viscera) produce lipid-rich (72.9–144.6 g/kg) meals were partially substitute commercial fishmeal (FM) on feeds grow Almaco Jack (Seriola rivoliana) juveniles for 10 weeks. The content 20:5n-3 22:6n-3 tissues fish fed shrimp presented values similar controls, but former had a better effect growth, lipid, phytosterols levels. meal lower concentration 20:4n-6 feed promoted higher proportion muscle liver, indicating selective conservation relation other acids. contained traces 18:5n-3 (0.02 scallops probably ingested dinoflagellates; after testing, phycotoxins like okadaic acid (OA) dinophysistoxin 1 (DTX1) detected mouse bioassay, lateral flow immunochromatography, quantified HPLC–MS/MS. presence toxins at concentrations (OA: 27.64 µg/g DTX1: 10.31 µg/g) affected almaco jack juveniles, setback needs be addressed before manufacturing mollusks. lipids reduce use FM diet, their improve lipid growth compared control diet with FM.