The annual seasonal abundance and spatial distribution of four widespread pelagic copepods. the Palaeartic calanoid Eudiaptomus gracilis. the cyclopoids Mesocyclops leuckarti and Thermocyclops oithonoides. and the Holartic Cyclops scutifer were investigated in Lake Gjerstadvann. https://www.fitnessgravesyardes.shop/product-category/ball-stop/