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Monthly Variations in the Nutritional Composition of Antarctic Krill Euphausia superba

机译：南极磷虾南极磷虾营养成分的月变化

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摘要

The proximate composition and various specific components of Antarctic krill Euphausia superba, in the catch season between March and August were investigated. Frozen krill were freeze-dried and milled. The proximate composition comprised water, proteins, fats, ash, fatty acids, and amino acids, while the specific components were vitamins, minerals, nucleotides, betaine, and astaxanthin. The moisture content of the krill ranged from 77 to 80%, with the highest value in June, and the ash content was between 12 and 13%. The protein content was lowest in May, and the fat content was 18-19%, with the highest value in March. The amino acid content varied according to the season: taurine and glycine were highest in August; -alanine was higher in April and May; and arginine, ornithine, and lysine were highest in March. The unsaturated fat content was ~50% and omega-3 fatty acids were highest in June. Oil-soluble vitamins A and E were highest in March, and the water-soluble vitamin content was less than that of oil-soluble vitamins. The mineral content was highest in June, and the most abundant mineral was sodium at 235.60 mg/100 g krill. The content of other minerals was lowest (2.94 mg/100 g) in April, except for lead. The nucleotide content was highest in July, while the betaine content was highest in April and lowest in June. The astaxanthin content was highest in May and ranged from 6 to 10 ppm in other months.
机译：在3月至8月的捕捞季节，调查了南极磷虾Euphausia superba的近端成分和各种特定成分。将冷冻的磷虾冷冻干燥并研磨。最接近的成分包括水，蛋白质，脂肪，灰分，脂肪酸和氨基酸，而特定成分是维生素，矿物质，核苷酸，甜菜碱和虾青素。磷虾的水分含量在77％到80％之间，在6月达到最高值，灰分含量在12％到13％之间。 5月蛋白质含量最低，脂肪含量为18-19％，3月最高。氨基酸含量随季节而变化：牛磺酸和甘氨酸在八月最高; -丙氨酸在四月和五月较高;精氨酸，鸟氨酸和赖氨酸在3月最高。 6月，不饱和脂肪含量约为50％，omega-3脂肪酸最高。 3月份油溶性维生素A和E最高，水溶性维生素含量低于油溶性维生素。 6月的矿物质含量最高，而最丰富的矿物质是钠，含量为235.60 mg / 100 g磷虾。除铅外，4月份其他矿物质的含量最低（2.94 mg / 100 g）。核苷酸含量在7月最高，而甜菜碱含量在4月最高，6月最低。 5月份虾青素含量最高，其他月份为6至10 ppm。

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