This data set contains strontium:calcium (Sr:Ca), barium:calcium (Ba:Ca), and stable oxygen isotope ratio (δ18O) data for 108 water samples collected from 54 locations in the Mississippi River basin during 2021. These data were collected to inform otolith and other calcified structure studies on fishes, focusing on rivers where limited or no water chemistry data relevant to fish hard-part chemistry studies were available. Funding for water sampling and analyses was provided by the Mississippi River Basin Panel on Aquatic Nuisance Species to Southern Illinois University (Dr. Greg Whitledge, principal invesigator).

Date created