THE BIOCHEMICAL-COMPOSITION OF KRILL, EUPHAUSIA-SUPERBA DANA, FROM SOUTH GEORGIA
THE BIOCHEMICAL-COMPOSITION OF KRILL, EUPHAUSIA-SUPERBA DANA, FROM SOUTH GEORGIA
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DOI：
10.1016/0022-0981(80)90049-0
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发表时间：
1980-01-01
影响因子：
2
通讯作者：
CLARKE, A
中科院分区：
文献类型：
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作者：
CLARKE, A
Krill，E. 1978年从南格鲁吉亚周围的沃茨取样的superbaDana含有10-11%的蛋白质、2-6%的脂质、0.3-0.6%的碳水化合物、2%的几丁质和3-4%的矿物灰（所有平均值，%鲜重）。脂肪含量随性成熟而变化很大：雄性含有2-4%的脂肪，未成熟的动物为4%（在季节后期都增加到5-6%），成熟的雌性为5-6%（尽管有些包含高达9%）。妊娠雌性动物丢失。60%的脂肪在产卵，和繁殖力的生化估计值在7000- 15000之间。主要脂类为磷脂、甘油三酯和游离甾醇，蜡酯含量为1.2%。平均色素含量为21.5 μ g/g鲜重。三酰甘油脂肪酸低，多烯酸，并含有高达4%的植烷酸;组合物是可变的，并显示可能的影响，饮食输入。磷脂富含多烯酸，特别是20：50 ω 3和22：6 ω 3，并且通常具有18：1 ω 7> 18：1 ω 9。卵巢三酰甘油几乎不含多烯酸，但卵巢磷脂相当不饱和。这些结果进行了讨论有关南极环境，并与先前的工作caridean十足类的结果进行了比较。
Krill, E. superba Dana, sampled from waters around South Georgia in 1978 contained 10-11% protein, 2-6% lipid, 0.3-0.6% carbohydrate, 2% chitin, and 3-4% mineral ash (all mean values, % fresh wt). Lipid content varied greatly with sexual maturity: males contained 2-4% lipid, immature animals 4% (both increasing to 5-6% later in the season) and mature females 5-6% (although some contained as much as 9%). Gravid females lost .apprxeq. 60% of their lipid at spawning, and a biochemical estimate of fecundity gave values in the range 7000-15,000. The major lipid classes were phospholipid, triacylglycerol and free sterol, and there was 1.2% wax ester. The mean pigment content was 21.5 .mu.g/g fresh wt. Triacylglycerol fatty acids were low in polyenoic acids and contained up to 4% phytanic acid; compositions were variable and showed the probable influence of dietary input. Phospholipids were rich in polyenoic acids, especially 20:50.omega.3 and 22:6.omega.3, and usually had 18:1.omega.7 > 18:1.omega.9. Ovarian triacylglycerol contained almost no polyenoic acids, but ovarian phospholipid was fairly unsaturated. These results are discussed in relation to the Antarctic environment, and compared with the results of previous work on caridean decapods.