Proximate composition and amino acid profile of European eel skin: influence of body weight

Abstract Fish processing industries worldwide are discarding million kilograms of fish waste per year. The disposal these wastes is an important handicap in industry. thick eel skin considered a product the industry and home usually converted into low market-value products. aims this study were to evaluate variations general chemical composition amino acid content relation body weight. moisture decreased lipid increased with weight eels. Eel had high protein content, which did not vary significantly Glycine was most abundant acid. predominant essential leucine. smaller eels contained higher levels threonine, valine, isoleucine, leucine, lysine, glutamic tyrosine than other groups. larger methionine, hydroxyproline, glycine, arginine, alanine proline indices showed that from nutritional quality. Graphical abstract