Images

The USGS research crew (GLSC; Huron, OH) aboard the R/V Muskie celebrate a large catch of adult yellow perch (Perca flavescens) to be tagged with acoustic transmitters and then released back into Lake Erie for tracking. Photo credit: Kevin Keretz, USGS.

Sunset after a long day of processing bottom trawl catches aboard the GLSC’s R/V Arcticus. Photo credit: Kristy Phillips, USGS.

A close-up of invasive Phragmites australis during the early spring; this stage results in the formation of fluffy seed heads. Photo credit: Kaira Liggett, USGS Contractor.

Research Fisheries Biologist Owen Gorman, Great Lakes Science Center, Lake Superior Biological Station attends the Northland College Job Fair on 30 March 2023. Photo Credit: Kelby Youngberg.

USGS contractor Riley Ralph working on knots during the continuing education workshop. Photo Credit: USGS.

A gravid Fatmucket mussel (Lampsilis siliquoidea) from which glochidia (larvae) were extracted for in vitro propagation (GLSC; Chesterton, Indiana). Photo credit: Dawn Shively, USGS Contractor.

A diatom under a light microscope at 10x magnification; this single-celled alga was found while examining a benthic algal sample taken from Lake Michigan. Photo credit: Jessica Oswald, USGS Contractor.

A nematode taken from Lake Michigan near Leland, Michigan as seen under a light microscope at 4x magnification. Photo credit: Jessica Oswald, USGS Contractor.

A white sucker cascades into a collection basket after being lifted by an Archimedes’ screw (large cylindrical object on top left) during a trial in the Cheboygan River in northern Michigan in 2021. Photo credit: Scott Miehls, USGS. 

An experiment is conducted at the USGS Great Lakes Science Center aquatic research laboratory in Ann Arbor, Michigan, where round gobies (Neogobius melanostomus) are photographed atop varying substrates and day/night conditions. Photo credit: Nick Yeager, USGS.

SLAP initiative members at Hammond Bay Biological Station, including John Hume (Michigan State University), Trisha Searcy (GLSC), Nick Johnson (GLSC), and Ralph Lampman (Yakima Nation). Photo credit: Tyler Bruning, USGS. 

An early morning trip out on Lake Huron near Alpena, Michigan, for a USGS acoustic telemetry crew. Photo credit: Brad Buechel, USGS.

USGS ecologist (GLSC; Ann Arbor, Michigan) uses GPS gear to map wetland vegetation at Metzger Marsh at the Ottawa National Wildlife Refuge on the shore of Lake Erie in Ohio. Photo credit: Kurt Kowalski, USGS.

Native to the Great Lakes, this virile or northern crayfish (Faxonius virilis) was collected from a gillnet in the Northern Refuge of Lake Michigan during a fall lake trout spawner survey. Photo credit: Patty Dieter, USGS.

USGS researchers tagging recently caught lake whitefish that will be released back into Lake Huron for an acoustic telemetry project to track fish movements. Photo credit: Chris Holbrook, USGS.

Leaving Alpena for a day of Great Lakes science during the Lake Huron fall forage fish survey. Photo credit: Cory Brant, USGS.

A slimy sculpin (Cottus cognatus) surrounded by rocks in Lake Superior. Photo credit: Scott Dwyer, USGS.

A burbot (Lota lota) between rocks illuminated by a dive light at night, in Lake Superior. Photo credit: Alden Tilley, USGS.

A larval coregonine, collected by USGS scientists during the 2022 Cooperative Science and Monitoring Initiative survey on Lake Huron, is examined and identified using a stereo microscope and high-resolution camera. Photo credit: Cory Brant, USGS.

Fisheries Technician Kristy Phillips (GLSC-Ann Arbor) demonstrates fish aging using the annular rings in fish scales for USGS Director David Applegate. Photo Credit: Josh Miller (USGS).

USGS Director David Applegate along with Associate Director Anne Kinsinger and Dr. Kurt Kowalski listen to Dr. Wes Bickford describe invasive Phragmites australis and the research being done at the Great Lakes Science Center to control it. Photo Credit: Josh Miller (USGS)