Зоопланктон буюу усны хөвөгч амьтныг судлах арга зүйн асуудалд Science research workers A. Dashdorj, M.M. Kojov and A.V. Samarina initiated and conducted zooplankton research work in Hovsgol Lake. In 1990, Professor A. Dulmaa published "Biological principal of the …