The U.S. Geological Survey is using autonomous surface and underwater vehicles on Lake Erie from mid-July through September 2023 to improve fishery surveys across the entire lake in cooperation with several public, private, and non-profit partners in both the U.S. and Canada.
On July 14, a wind and solar-powered uncrewed surface vehicle called a Saildrone Explorer was launched on Lake Erie out of Erie, Pennsylvania. The vehicle is equipped with several environmental sensors both under and above the water, including a fisheries echosounder that uses sound to detect fish, much like a fish-finder on a fishing boat, and is operated by Saildrone, Inc. The saildrone will operate in Lake Erie’s western, central, and eastern basins, circumnavigating the lake in a clockwise direction through the end of September.
“This is the first time a long-range wind powered autonomous surface vehicle will be used on Lake Erie,” said Dr. Mark DuFour, USGS Fishery Biologist. “USGS is looking forward to working closely with Lake Erie partners on this mission to inform fishery management decisions. We encourage boaters to maintain safe distances from the saildrone to ensure that we can finish the mission.”
In addition to the saildrone, a long-range autonomous underwater vehicle (LRAUV) will be deployed near Fairport Harbor, Ohio for one week in mid-September. The LRAUV is operated by the Monterey Bay Aquarium Research Institute (MBARI) and will travel at 5-15 meters depth.
David Nihart, Fisheries Management Chief for the Pennsylvania Fish and Boat Commission and Chair of the Lake Erie Committee, said, “Monitoring Lake Erie fish populations is integral to sustainable management of the recreational and commercial Lake Erie fishery, but fish community changes and dynamic habitat conditions often create monitoring challenges.”
Saildrones are quieter and may detect more fish swimming closer to the surface than noisy vessels which may scatter fish. The LRAUV, which operates in the middle of the water column and has sensors looking up and down, may detect bottom-dwelling and surface-dwelling fish more accurately than traditional fishery research vessels or the saildrone. Scientists will compare the data gathered using each platform to address potential sampling biases in existing surveys.
The partners will also use the autonomous vehicles to study a variety of other questions on Lake Erie, including the effect of harmful algal blooms on yellow perch in the western basin, detection of large species such as lake whitefish, burbot and lake trout in the eastern basin, and the effect of low-oxygen zones on bottom-dwelling fish in the central basin.
Partners on these studies include the Ohio Department of Natural Resources, Michigan Department of Natural Resources, The Ohio State University, New York State Department of Environmental Conservation, Ontario Ministry of Natural Resources and Forestry, and the Pennsylvania Fish and Boat Commission.
Notices regarding both autonomous vehicles have been provided to mariners via the U.S. Coast Guard. The acoustic technology used in the study is not hazardous to people or animals and will not interfere with sonar, communications equipment, or similar electronics. Boaters are asked to maintain a safe distance of 1500 feet from the saildrone.
