KVICKSILVER I GÄDDA – VÄSTERBOTTENS LÄN Kopplingar till omgivningsfaktorer / Mercury in Pike – County of Västerbotten Connections to environmenal factors
This investigation is a result of a cooperation between the County Council, the Municipalities and the County Administration in the County ot Västerbotten, Sweden. The purpose was to study connections between mercury levels in northern pike (Esox Lucius) and environmental factors. Furthermore changes in time were investigated. A classification system, which can be used to predict where high (or low) levels of mercury in fish can be expected, was made. The parameters that was best correlated to mercury levels in pike was the position of the lake and the watercolour. In order to obtain risk lakes and lowrisk lakes, regarding mercury levels in pike, the lakes were classified by there watercolour as in Wiederholm (1989).