Ratios of strontium to calcium measured in pectoral fin rays of lake sturgeon (Acipenser fulvescens) captured in the lakes and rivers of Namakan Reservoir, Minnesota, United States and Ontario, Canada, 2007-15

The U.S. Geological Survey, Voyageurs National Park, South Dakota State University, and Missouri Department of Conservation conducted a cooperative study to measure...美国地质调查局（U.S. Geological Survey）、沃亚哲斯国家公园（Voyageurs National Park）、南达科他州立大学（South Dakota State University）以及密苏里州保护部（Missouri Department of Conservation）合作开展了一项研究，以测量……