The effect of Urmia lake shrinkage on brine shrimp, Artemia populations

Document Type : Article

Authors

1 Assistant prof. National Artemia Research Center, Urmia, Iran

2 National Artemia Resaerch Center, Urmia, Iran

3 National Artemia Research Center, Urmia, Iran

Abstract

Urmia Lake is the second largest hypersaline lake in the world when it is full. However, weather conditions changes and Intense water consumption is reduced water input into this terminal lake during the last two decades. As a result, the lake surface area has been reduced from 5500 km2 in 1995 to about 1661 km2 in November 2018. Water level decrease has reduced Artemia density in main lake. The brine shrimp Artemia is the dominant macrozooplankton in many high saline environments. The results indicated that water temperature and salinity were the most crucial factors determining Artemia density and population structure. Urmia lake crisis had significant impact on genetic structure of Artemia urmiana particularly by genetic diversity reduction which ultimately may put risk on the survival of this crustacean. In General, regarding the high values of Artemia and its cysts in aquaculture industry, it can be concluded that Urmia lake shrinkage has had sever socio- economic impacts on the region's people, particularly on Lake Periphery dwellers.

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