15 MAY 1999
A STUDY OF ARTEMIA IN LAGKOR CO, TIBET, I: BIOLOGICAL FEATURE (in Chinese)
Liu Zunying, Zheng Mianping, Luo Jian-1998
Journal of Lake Sciences, 10(2): 92-96
Abstract:
Lagkor Co is a saline lake located in the subfrigid-plateau arid zone on the Ali Plateau, Tibet, at 89 02'-89 12'E and 31 59'-32 04'N, with an elevation of 4470m above sea level. The lake water belongs hydrochemically to the weak carbonate sub-type and its salinity is 55-65 ppt.
The lake water is frozen from December to March of the next year. Winter eggs of brine shrimp are hatched mostly from late April to the beginning of June. The brine shrimps are reproduced from May to September. Dormant eggs of brine shrimp are produced abundantly from late September to October. Eggs of Artemia are distributed chiefly in the northeastern and northwestern parts of the lake.
The brine shrimp and eggs of Artemia of the Lagkor Co in Tibet are purplish red, and egg of Artemia belongs to the dark-colored shell type. The diameter of the dry Artemia egg is 264.5 micro m. The number of eggs per gram is about 120 000. The length of nauplii is 607.7 micro m and that of adult brine shrimp 0.7-1.2 cm. Compared with 13 other brine shrimp strains at home and abroad, the Artemia of Lagkor Co belongs to the larger type of Artemia strains.
(Open Laboratory of Saline Lake Resources and Environment, Chinese Academy of Geological Sciences, Beijing 100037, China)