Skip to main content
Grand Valley State University Logo Grand Valley State University Logo Grand Valley State University Logo

Robert B. Annis Water Resources Institute (AWRI) - Ruetz Lab

A coastal wetland with emergent reeds and evergreen trees in the distance.

Research

Current Projects

Technicians collect water quality samples among a stand of wetland reeds.
Graduate student Alan Mock examines fish eggs while kneeling by a streamside egg incubator - a series of large tubs and nets receiving water via pipes from an adjacent stream.
A fyke net is shown set up in a lake to capture fish.
A fyke net is show set up among lily pads and emergent aquatic vegetation in an inland waterbody.
A fyke net is shown set up in an open water pond; an American flag and memorial cannon are seen in the distance.
Carl Ruetz displays a largemouth bass while sitting in a jonboat full of nets.

Fieldwork Photos

Megan Mader displays a largemouth bass for the camera.
Zak Collins displays a bowfin for the camera.
A gloved Travis Ellens prepares to release a small snapping turtle, which has its mouth open while looking at the camera.
Zak Collins collects an invertebrate sample among lily pads from a jonboat.
Travis Ellens records data on a clipboard.
Zak Collins records data on a water quality sonde.
Bert Carey displays a juvenile gar for the camera.
Technicians install a fyke net among a reed bed.
Alan Mock and Tony Weinke paddle a jonboat.
Travis and Maria measure the shell length of a large snapping turtle.
Alan Mock displays a bowfin for the camera while Bert Carey looks on.
Three technicians pose for a photo in the jonboat among emergent vegetation.
Three technicians pose for a photo in the jonboat while surrounded by open water.
Kaitlyn collects water quality data with a sonde near a deployed fyke net.
Maria displays a bluegill for the camera.
Maria displays a pumpkinseed for the camera.
Travis and Alan record data from the water quality sonde on a clipboard.
Tony measures the length of a bluegill.
Kaitlyn holds a bowfin for the camera.
Three technicians pick macroinvertebrates from white trays on the jonboat.
Three technicians on the jonboat collect a water sample using a bottle on a long stick.
Kaitlyn holds a large catfish for the camera.
Alan Mock holds a large carp for the camera.
Travis holds a northern map turtle for the camera.
Two technicians pick macroinvertebrate samples.
Three technicians collect a water sample using a long cup on a stick.
Two technicians conduct a backpack electrofishing survey.
Three wader-wearing technicians stand among emergent wetland vegetations and pose while conducting a macroinvertebrate D-net sweep survey.
A fyke net deployed in a wetland among emergent vegetation.
A Great Lakes coastal wetland; a stand of reeds in the foreground slows down waves and collects foam while open water, blue sky, and fluffy clouds can be seen in the distance.
A closeup of a juvenile lake sturgeon being held in one hand.
An endangered Blanding's turtle found during fyke net surveys.
Kaitlyn displays a largemouth bass during night time boat electrofishing surveys.
Page last modified April 14, 2026