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    Relations between planktivorous fish abundance, zooplankton and phytoplankton in three lakes of differing productivity

    Water chemistry, phytoplankton, zooplankton and fish populations werestudied over several years in three shallow, non-stratified lakes withdiffering nutrient loadings and fish communities in southwest Finland....

    Jouko Sarvala, Harri Helminen, Vesa Saarikari, Seppo Salonen in Hydrobiologia (1997)