Images

The bottom of Lake Huron as seen by USGS divers (GLSC; Chesterton, Indiana) six meters below the surface. Photo credit: Madeleine Giordano, USGS.

The USGS crew of the R/V Stonecat (GLSC; Chesterton, Indiana and Ann Arbor, Michigan) all geared up for a cold day of research on Lake Huron. Photo credit: Jessica Oswald, USGS Contractor.

A native Northern clearwater crayfish (Faxonius propinquus) collected in the Northern Refuge of Lake Michigan during a lake trout survey aboard the GLSC’s R/V Arcticus. Photo credit: Patty Dieter, USGS.

Tagged Grass Carp swimming away after being release post telemetry surgery into the Sandusky River, OH. Photo credit: James Roberts, USGS.

The USGS science crew (GLSC; Ann Arbor, Michigan), vessel crew (GLSC; Cheboygan, Michigan), and a local volunteer are ready at the gillnet lifter table waiting to lift gillnets and pick out fish captured during an annual survey in Lake Michigan. Photo credit: Patty Dieter, USGS.

Evening sunset beaming through the Charlevoix lighthouse following a day of sampling for a spring gillnet survey on Lake Michigan. Photo credit: Patty Dieter, USGS.

USGS biological science technicians (GLSC; Ann Arbor, Michigan) aboard the R/V Desmid mapping Manistique Rocky Shoal in Lake Michigan. Photo credit: Alden Tilley, USGS.

USGS Researchers (GLSC; Ann Arbor, MI) find a few different year classes (ages) in the spring catches of alewife (Alosa pseudoharengus) during a spring prey fish assessment in northeastern Lake Michigan near Sturgeon Bay. Photo credit: Kristy Phillips, USGS.

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.