JM Hessenauer
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jmhessenauer.bsky.social
JM Hessenauer
@jmhessenauer.bsky.social
170 followers 190 following 20 posts
Fisheries Research Biologist Studying Michigan's inland and Great Lakes Fisheries from the Lake St. Clair Fisheries Research Station 🇺🇲🇩🇪
Posts Replies Media Videos
Reposted by JM Hessenauer
sturgeonrock.bsky.social
One of the projects I worked on before and after my retirement was assembling a History of the Lake St. Clair Fisheries Research Station document. The pdf can be found on the stations website at this link:

www.michigan.gov/dnr/-/media/...
www.michigan.gov
August 24, 2025 at 1:17 AM
Reposted by JM Hessenauer
sullivan-fisheries.bsky.social
Individual-based models reveal thermal refuges insufficient for brown trout survival during extreme heat events, predicting up to 86% mortality despite refuge availability. New paper!
besjournals.onlinelibrary.wiley.com/doi/10.1111/...
Warming riverscapes annually challenge the role of thermal refuges for thermoregulating salmonids
While our model assumes static thermal refuge conditions due to data limitations, our findings highlight the limits of riverscape thermal refuges as a conservation tool under intensifying climatic co...
besjournals.onlinelibrary.wiley.com
August 25, 2025 at 12:31 PM
Reposted by JM Hessenauer
grist.org
Grist is looking for an Upper Great Lakes reporter to cover climate impacts, environmental health, and solutions to the climate crisis, primarily for a local and regional audience. #journalismjobs

Apply here: job-boards.greenhouse.io/grist/jobs/4...
Regional Reporter, Interlochen
Grand Traverse Bay, Michigan
job-boards.greenhouse.io
August 18, 2025 at 7:27 PM
jmhessenauer.bsky.social
Check out this great article that features some of the work that our office has done!
August 15, 2025 at 8:45 PM
jmhessenauer.bsky.social
A couple of busy days on the R/V Channel Cat. Safety/emergency training yesterday and diving on acoustic receivers today!
Sitting inside an inflatable life raft A scuba divers giant steps into the water
July 2, 2025 at 9:52 PM
jmhessenauer.bsky.social
Sweet video put together by our partners about recent Muskie tagging!

youtu.be/yHT_VbBxqoo?...
Lake Macatawa Muskellunge Telemetry Study
YouTube video by Will Schultz
youtu.be
May 28, 2025 at 4:19 PM
jmhessenauer.bsky.social
Don't be a sucker youtu.be/vGAqYNFQdZ4?...
Don't Be a Sucker
YouTube video by US National Archives
youtu.be
March 6, 2025 at 7:55 PM
jmhessenauer.bsky.social
Check out our new paper! We examined demographic tends of a #GreatLakes smallmouth bass population in an effort to explain improvements in size structure. We believe a steady decrease in mortality is the best explanation! Find it here authors.elsevier.com/a/1kXkn1MRgT...
February 3, 2025 at 1:41 PM
Reposted by JM Hessenauer
lizmandeville.bsky.social
I am still looking for a Master's student to join my lab at Northern Michigan University in fall 2025. Please get in touch if you are interested, and share with keen students interested in fish, genetics, or evolution!
Image of a poster with a photo of a lake beneath blue sky. Poster text: Graduate position in freshwater fish evolution. The Mandeville Lab at Northern Michigan University is recruiting a MS student to work on the evolutionary genomics of freshwater fish (fall 2025). Research in our lab group focuses on how evolutionary processes shape freshwater fish biodiversity. Specific focus areas include hybridization, effects of anthropogenic disturbance, population connectivity, and the evolution of fish sex determination mechanisms. Project topic will depend on the interests of the successful candidate. Ongoing work in the lab includes evolution of hybrid unisexual dace lineages, leuciscid minnow hybridization or demography in response to anthropogenic change, and genetic diversity or population connectivity of lake whitefish. Candidates interested in evolution, fish biology, ecology, genetics, conservation, or related fields are encouraged to apply. Desired qualifications include the ability to balance working independently and collaboratively, excellent work habits, and strong writing skills. Projects will involve analysis of high resolution genomic data, requiring computational approaches and high performance com- puting. No prior computational experience is required, but applicants must be enthusiastic about building their computational skills. The Mandeville Lab aims to promote equity, diversity, and inclusion, and encourages applications from students who are members of historically excluded or marginalized groups. NMU is located in Marquette, Michigan, in the Upper Peninsula of Michigan. Marquette is a small but vibrant city on the southern shore of Lake Superior, located close to beautiful natural areas. To apply, please send a letter of interest, CV, unofficial transcript, and contact information for 3 references to Dr. Liz Mandeville, lmandevi@nmu.edu. Review of applications will begin immediately and continue until a suitable candidate is identified.
January 15, 2025 at 7:50 PM
Reposted by JM Hessenauer
bradu20.bsky.social
We don’t get many “nice” December days on the water on the #GreatLakes. No complaints from me today. Last of our #telemetry receivers have been deployed. @jmhessenauer.bsky.social
Outboard motor on the back of a boat running at a fast speed. Water is calm expert for the boat wake. Blue sky with some clouds breaking it up.
December 10, 2024 at 8:23 PM
Reposted by JM Hessenauer
jolatimore.bsky.social
Registration for Michigan State University Extension's award-winning Introduction to Lakes Online course is open! This six-week online class is designed for anyone interested in gaining a greater appreciation for inland lakes.

Come learn about lakes with us!

www.canr.msu.edu/courses/intr...
Registration for the award-winning Michigan State University Extension Introduction to Lakes Online course is open! This introductory six-week online class is designed for anyone interested in gaining a greater appreciation for inland lakes including concerned residents, decision makers, local leaders, and lakefront property owners. Course instructors include faculty from MSU Extension and state agency personnel. The course covers a variety of topics including lake ecology, watershed management, shoreline protection, aquatic plants, Michigan water law, and community engagement. These topics are explored online through video lectures, interactive activities, and discussion forums. Additional resources are also provided for those looking to dive deeper. Participants communicate with each other and instructors through lively discussion forums and biweekly Ask-an-Expert webinars which include guests from organizations such as the Michigan Department of Natural Resources and the Michigan Department of Environment, Great Lakes, and Energy. Registration is open now through January 28, 2025. The cost of the course is $115 per person. Register by January 6 for an early bird price of $95 per person. Scholarships are available. Current individual members of the Michigan Lakes and Streams Association are eligible to receive a $95 reimbursement upon successful completion of the course. A certificate of completion is awarded to those who complete the class. Participants also can receive continuing education credits including 16 Michigan Department of Agriculture and Rural Development Pesticide Applicator Re-Certification credits (8 commercial core and 8 aquatic) and educational hours in the MSU Extension Master Gardener, Master Citizen Planner, and Michigan Naturalist programs. Learn more and register at www.canr.msu.edu/lakesonline.
December 5, 2024 at 6:08 PM
jmhessenauer.bsky.social
Icy drive back down south from our biologists conference today 🥶
December 4, 2024 at 10:40 PM
Reposted by JM Hessenauer
harknesslab.bsky.social
Black Bass 2025.

storymaps.com/stories/baf0...
Black Bass Symposium
San Antonio, Texas • August 10 -14, 2025
storymaps.com
November 28, 2024 at 2:30 AM
jmhessenauer.bsky.social
Came up empty looking for an @glatos-fish.bsky.social receiver in the Flint River today. Receiver is there but buried deep in the sand! Water 45 F 🥶 with @bradu20.bsky.social
Two scuba divers walk into the water on a grey day.
November 22, 2024 at 9:04 PM
jmhessenauer.bsky.social
Ok... So these are pretty damn cool!!

Make yours:

scholargoggler.com
November 21, 2024 at 11:21 PM
jmhessenauer.bsky.social
Wrapped up of Lake St Clair Nearshore fish survey today about two weeks later than normal. Tons of big Largemouth Bass and finally got a juvenile Muskie! #Fisheries
Two fisheries scientists hold up largemouth bass with a lake in the background. A small spotted Muskie
November 20, 2024 at 6:46 PM
Reposted by JM Hessenauer
martyhamel.bsky.social
If you age fish with calcified fish structures, check out our new website that displays images of known-age fish. Learn how to age fish and touch up on your skills! www.fishage.org
🐟 #fisheries
#fishsky
#otoliths
Home - FishAge: Known-Age Fish Image Database
Building on the vision of Dr. Mark Pegg and Dave Buckmeier, our team came together in the summer of 2021 to brainstorm a means to determine the availability
www.fishage.org
November 19, 2024 at 2:31 AM
Reposted by JM Hessenauer
bradu20.bsky.social
Found a swan in distress today while working a fish survey. Discovered it was hopelessly tangled in fishing line. 😔 After cutting it free it was exhausted so it rode around with us for awhile. Decided it was time to release it when it bit my boot. 😉 #GreatLakes #birds @jmhessenauer.bsky.social
Mute Swan sitting awkwardly in an aluminum boat. I’m giving the camera a thumbs up in the background. Looking down at a Mute Swan resting in an aluminum boat. A mute swan is swimming away on a calm lake. Trees and houses in the background.
November 19, 2024 at 1:00 AM
jmhessenauer.bsky.social
Some big strong Pumpkinseeds from our nearshore electrofishing survey today. One of my favorite fish species! @bradu20.bsky.social
Pumpkinseed sunfish laying on a measuring board.
November 18, 2024 at 11:31 PM
Reposted by JM Hessenauer
bradu20.bsky.social
Biggggg Largemouth Bass were the highlight of this morning’s electrofishing survey on Lake St Clair!
@jmhessenauer.bsky.social
#GreatLakes
#fish
Livewell on boat full of fish and vegetation Largemouth Bass on wood measuring board Another Largemouth Bass on wood measuring board
November 15, 2024 at 5:34 PM
jmhessenauer.bsky.social
Just another day at the office!
Lake St Claire largemouth bass A large white crappie
November 13, 2024 at 7:14 PM
jmhessenauer.bsky.social
Pretty sweet day today!
March 19, 2024 at 8:16 PM
jmhessenauer.bsky.social
Check out @bradu20.bsky.social and myself in this DNR showcase article!

content.govdelivery.com/accounts/MID...
Showcasing the DNR: Pro anglers help DNR
content.govdelivery.com
January 4, 2024 at 1:09 PM
jmhessenauer.bsky.social
Amazing setup to tag some inland Cisco this evening! Fisheries!
Fish surgery setup inside ice shanty.
November 30, 2023 at 1:55 AM
jmhessenauer.bsky.social
Finished up our nearshore electrofishing survey with these beautiful Great Lakes Smallmouth Bass!

🐟🐠🌊
#fisheries #GreatLakes

Photo credit to @bradu20.bsky.social
Two fishery scientists holding up two large Smallmouth Bass
November 15, 2023 at 3:37 PM