Comparison of Biochemical Composition and Nutritional Value of Antarctic Krill (Euphausia Superb) with Several Species of Shrimps
Antarctic krill (Euphausia superb) is a species of krill (shrimp-like crustaceans) found in the Antarctic waters of the Southern Ocean. It is the most abundant species of krill, which catchable stock is believed to amount up to 10 million tons per year, and may be the most potential marine resource for utilization as food in the world. This paper compared the nutritional components and heavy metals of edible portions of Antarctic krill, greasy-back shrimp (Metapenaeus ensis), Chinese white prawn (Exopalaemon modestus), and oriental river prawn (Macrobrachium nipponense). Antarctic krill meat contained 76.39% of water, 17.22% of crude proteins, 2.66% of crude lipids, and 1.43% of ashes, respectively. At dry basis, Antarctic krill had relatively lower content of crude protein (72.92%) than oriental river prawn (85.35%), greasy-back shrimp (81.12%), or Chinese white prawn (78.18%). However, it had significantly higher lipid content (11.25%) than the three species of shrimps (4.89%~6.65%). And the total amino acids in dry samples of Antarctic krill meat was 74.46g/100g, which was lower than the shrimps, but the essential amino acid content (45.90g/100g protein) was higher than others. Regarding to minerals, no significant difference was found in Antarctic krill and the shrimps, with exceptions that Antarctic krill contained two to three times higher content of magnesium (458.28mg/100g) and copper (4.96mg/100g) than shrimps. In addition, the heavy metals including lead (Pb), mercury (Hg), arsenic (As), chromium (Cr) in Antarctic krill meat met the limit standard of contaminants in aquatic products. But fluorine content of Antarctic krill meat surpassed the safety limit (2.0mg/kg) and might be a safety concern.
Qunjie Xu, Honghua Ge and Junxi Zhang
L. Liu et al., "Comparison of Biochemical Composition and Nutritional Value of Antarctic Krill (Euphausia Superb) with Several Species of Shrimps", Advanced Materials Research, Vols. 361-363, pp. 799-803, 2012