An extensive three-year research study of lakes in and around the Grand Portage Indian Reservation in Minnesota has found an abundance of pharmaceuticals, personal care products, hormones, pesticides, and other chemicals in water, lake bottoms and fish. What threat this poses for humans and wildlife will need to be studied further. But the presence of
Every spring, Dr. Carl Isaacson, a professor of environmental studies at Bemidji State University, sends his students out to collect perch from waters across Minnesota. Then, they study an egg yolk protein found in the perchs’ livers, called vitellogenin, which may provide evidence of endocrine disruption in the state’s aquatic species. Over the past few