“‘Thus otters serve as biomonitors – organisms that contain information on the quantitative and qualitative aspects of the environment – of wildlife exposure,’ according to a new study. They also serve as biomonitors for human health because the same toxic chemicals found in otters have also been found in people who eat contaminated fish.The study published in the journal ‘Ecotoxicology and Environmental Safety’ found high concentrations of chemical compounds in the livers of 23 otters in central Illinois.Especially troubling were the highest concentrations of dieldrin ever reported in otters anywhere in the United States, said lead author Samantha Carpenter, a wildlife technical assistant at the University of Illinois, Urbana-Champaign.Dieldrin is one of the organochlorine insecticides banned in 1978. More than three decades later, high levels of the chemicals remain in river sediments and accumulate in the fish that otters and people may eat.The compound has been linked to neurological, behavioral and immune-suppression problems in wildlife. Scientific studies disagree on adverse human effects, but some studies have linked dieldrin to asthma, Parkinson’s disease, Alzheimer’s disease and breast cancer, Carpenter said.”
Recent News
- Join IISG as a new pollution prevention outreach assistant
- Beach season means it’s time for lifesaving Lake Michigan water safety resources
- New crayfish curriculum engages students in Great Lakes and local invasive species issues
- Relaunched website provides resources for proper medicine disposal
- Meet our Grad Student Scholars: Lena Azimi
IISG Instagram
IISG is hiring a part-time pollution prevention outreach assistant. IISG’s pollution prevention team addresses water quality issues affecting the Great Lakes coasts and the inland waters of Illinois and Indiana, specifically focusing on contaminants of emerging concern like pharmaceuticals, microplastics and marine debris, and PFAS. This outreach assistant will support the pollution prevention team by developing outreach activities and engaging with communities to share that knowledge.
Learn more and apply at the link in bio.

🌞 Enhance Your Summer Programs with Great Lakes Science! 🌞
Calling all summer science and STEM educators! Elevate your summer camps, summer school, or other summer programming with our Loanable Kits. Dive into Great Lakes science and stewardship, and inspire the youth you work with.
🔍 Why Choose Our Loanable Kits?
-Interactive Learning: Engage students with hands-on activities.
-Great Lakes Exploration: Teach the wonders of the Great Lakes.
-Environmental Stewardship: Foster a sense of responsibility and care for our natural resources.
📅 Learn More & Reserve Your Kits at the link in bio.

Don`t miss out on the latest edition of our "Making Waves in Education" newsletter! Reserve your spot for a live, Students Ask Scientists call from Lake Superior, and stay updated on upcoming in-person events to learn and network with fellow educators. Perfect for Illinois and Indiana educators passionate about the Great Lakes and environmental education.

Join us on June 6-7 at the Indiana State Fairgrounds to explore aquaculture business management at the NCRAC Aquaculture Business Short Course! Presented by Sea Grant & @purdueextension, this course provides essential skills for effective farm finance management. Don’t miss this opportunity to enhance your expertise in aquaculture!
Important Info:
-Hands-on training to help aquaculture producers manage their farm finances
-Includes one-on-one expert time + free $120 textbook
-Instructors from Purdue, Mississippi State, and University of Maryland
-Laptop + farm financials required for participation
-Limited seating – first come, first served!
More info at the link in bio.
