Photo by Janet Meredith | U.S. Army Corps of Engineers, St. Louis District - MVS | 03.22.2024
U. S. Army Corps of Engineers (USACE), Rivers Project Office staff collaborate with the Missouri Department of Conservation to monitor fisheries on the Mississippi River. The USACE supports this program through coordination with the Sustainable Rivers Program to create spawning habitats and hydraulic modeling at the Melvin Price Locks and Dam on the Mississippi River....
Photo by Janet Meredith | U.S. Army Corps of Engineers, St. Louis District - MVS | 03.22.2024
Rivers Project biologists, in collaboration with the Missouri Department of Conservation, regularly monitor fish on the Mississippi River. They embed acoustic tags by making a small incision in the fish’s abdominal cavity to insert the tube-like device, then closing with incision with three absorbable sutures. This entire procedure, which takes approximately 10 minutes, is carefully......
Photo by Janet Meredith | U.S. Army Corps of Engineers, St. Louis District - MVS | 03.22.2024
Rivers Project biologists, in partnership with the Missouri Department of Conservation, regularly monitor fish on the Mississippi River. They implant acoustic tags in the fish by making a small incision in the abdominal cavity, inserting the tube-like tag, and then suturing the incision with three absorbable sutures. This entire procedure takes approximately 10 minutes, is carefully performed......
Photo by Janet Meredith | U.S. Army Corps of Engineers, St. Louis District - MVS | 03.22.2024
Biologists from the Rivers Project, working with the Missouri Department of Conservation, regularly monitor fish in the Mississippi River. They embed acoustic tags by making a small incision in the fish’s abdominal cavity and inserting the tube-like tag. These tags emit acoustic “pings” that are picked up by specialized receivers. This allows the biologists to track the movements of the......
Photo by Janet Meredith | U.S. Army Corps of Engineers, St. Louis District - MVS | 03.22.2024
Rivers Project Biologists working with the Missouri Department of Conservation regularly monitor fish on the Mississippi River. They embed acoustic tags by cutting a small incision in the abdominal cavity of the fish and inserting the small tube-like tag. These sounds can be detected by specialized receivers, and processed to determine if a fish swimming into the reception area carries a......
Photo by Janet Meredith | U.S. Army Corps of Engineers, St. Louis District - MVS | 03.22.2024
Rivers Project biologists working with the Missouri Department of Conservation regularly monitor fish on the Mississippi River. Data is collected to ensure populations are maintaining. Portable scales are used to weigh large fish such as this netted lake sturgeon weighing 45 lbs....
Photo by Janet Meredith | U.S. Army Corps of Engineers, St. Louis District - MVS | 03.22.2024
This lake sturgeon, captured for monitoring and released, is an impressive dinosaur of a fish, covered in rows of diamond-shaped scutes instead of scales. It has four barbels that act as sensory organs hanging from their snout, helping them locate prey. Biologist study lake sturgeon to improve populations and habitat areas. The lake sturgeon is a benthivorous, meaning they eat prey from the......
Photo by Janet Meredith | U.S. Army Corps of Engineers, St. Louis District - MVS | 03.22.2024
This shovelnose sturgeon is being scanned after receiving a passive integrated transponder (PIT) tag allowing biologists to scan the tag and follow sturgeon throughout its life cycle. The St. Louis District Rivers Project Office and Missouri Department of Conservation place tags in fish periodically for monitoring purposes. Each tag contains a unique code with information about the fish, like......
