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4
Science
4
republic of karelia
3
aquatic ecosystems
2
population
2
biological indicators
1
commercial fish farming
1
community of aquatic organisms
1
densely-rakered whitefish
1
distribution
1
ecological forms
1
economic use
1
eutrophication
1
fish fauna
1
ichthyofauna
1
industrial pollution
1
lake
1
lake ecosystems
1
lifestyle
1
roach
1
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