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Relationship between mercury accumulation in young-of-the-year yellow perch and water-level fluctuations

January 1, 2005

A three-year (2001−2003) monitoring effort of 14 northeastern Minnesota lakes was conducted to document relationships between water-level fluctuations and mercury bioaccumulation in young-of-the-year (YOY) yellow perch (Perca flavescens) collected in the fall of each year at fixed locations. Six of those lakes are located within or adjacent to Voyageurs National Park and are influenced by dams on the outlets of Rainy and Namakan lakes. One site on Sand Point Lake coincides with a location that has nine years of previous monitoring suitable for addressing the same issue over a longer time frame. Mean mercury concentrations in YOY yellow perch at each sampling location varied significantly from year to year. For the 12-year monitoring site on Sand Point Lake, values ranged from 38 ng gww-1 in 1998 to 200 ng gww-1 in 2001. For the 14-lake study, annual mean concentrations ranged by nearly a factor of 2, on average, for each lake over the three years of record. One likely factor responsible for these wide variations is that annual water-level fluctuations are strongly correlated with mercury levels in YOY perch for both data sets.

Publication Year 2005
Title Relationship between mercury accumulation in young-of-the-year yellow perch and water-level fluctuations
DOI 10.1021/es050471r
Authors J.A. Sorensen, L.W. Kallemeyn, M. Sydor
Publication Type Article
Publication Subtype Journal Article
Series Title Environmental Science & Technology
Index ID 70027752
Record Source USGS Publications Warehouse
USGS Organization Columbia Environmental Research Center