Characterization of Lipids from Kadal Shrimp (Metapenaeus dobsoni, Miers, 1878) Head Waste: A Potential Source of Omega-3 Fatty Acid

Abstract

Shrimp head waste from processing industries contains good amount of essential compounds which include protein, fat, mineral and ash. Utilization of these wastes producing valuable compounds such as protein hydrolysates, lipids and minerals. Kadal shrimp Metapenaeus dobsoni head waste was analysed for the occurrence of essential fatty acids. The content of polyenes (PUFA), monoenes (MUFA) and saturates in the shrimp head waste were found to be around 28.26, 27.22 and 44.52%. Major MUFA found in head waste are oleic (C18:1n-9) 13.22 % and vaccenic acids (C18:1 n-7), and PUFA are DHA (C22:6 n-3) 9.57 %, EPA (C20:5 n-3) 7.84 % and arachidonic acid (C20:4 n-6) 7.74 %. The ratio of ω-6to ω-3fatty acid was 1:1.64 compromising the Adequate Intake levels (AIs) of 1.1 to 1.6 grams per day.