15 MAY 1999
ARTEMIA IN LAGKOR LAKE IN TIBET, II: NUTRIENTS (in Chinese)
Liu Junying, Luo Jian, Zheng Mianping-1998
Journal of Lake Sciences
Abstract:
The content of nutrients which are composed of proteins, amino acids and fatty acids etc of Artemia (including adult brine shrimp, nauplii and brine shrimp eggs) is the main criterion to assess the quality of Artemia, because the food value of animal of prey depends on the constituent and content of amino acids and fatty acids. The nutrients of the Artemia in Lagkor Co Lake of Tibet is of high value and a succession of samples taken by R&D Centre of Saline Lakes and Epithermal Deposits in 1996 and 1997 are monitored. The protein content of adult brine shrimp is nearly 20%, and that of nauplii and decapsulated brine shrimp eggs about 55% and 50% respectively. Among fatty acids, the unsaturated fatty acid of adult brine shrimp is up to 83% in the sample of 1997 and that of nauplii and decapsulated brine shrimp eggs about 91% and 87% respectively. Three unsaturated fatty acids, content of HUFA (20:3, 20:4, 20:5) of adult brine shrimp is nearly 8%, and that of both nauplii and decapsulated brine shrimp eggs exceed 20%. Three necessary fatty acids, content of EFA (18:2, 18:3, 20:5) of adult brine shrimps is 16%, and that of nauplii and decapsulated eggs is 21% and 26% respectively. The contents of EPA (20:5) of both nauplii and decapsulated eggs are above 18%. The content of EPA of Artemia in Lagkor Co Lake is higher than that of Artemia in salt lakes of Xinjiang, Qinghai, Inner Mongolia, Shanxi, Hebei and that of Artemia in salterns of Tianjin and Hainan. The unsaturated fatty acid content of decapsulated brine shrimp eggs in Lagkor Co Lake is higher than that in other lakes at home and abroad.
(Open Laboratory of Saline Lake Resources and Environment, Chinese Academy of Geological Sciences (C.A.G.S.) Institute of Geology, C.A.G.S., Beijing 100037, China)