I’m excited to share a new paper from my lab, by former PhD student Ben Schultz! It’s a genome paper for the northern redbelly dace, a small freshwater fish with fascinating biology - stay tuned for more cool work enabled by this resource. doi.org/10.1139/gen-...

We're hiring a genetics lab manager position at NOAA in Juneau, Alaska! The successful candidate will oversee day-to-day laboratory operations and contribute to the development of new molecular methods. Salary is $75-145k/yr. Email [email protected] with questions www.usajobs.gov/GetJob/ViewD...

Mikey’s latest project - a dataset for air quality and environmental hazards. App is new this week - download and try it out!

Three weeks left to apply to our postdoc position on alpine plant resilience! Us: Three years of funding, an awesome collaborative team, a gorgeous study system, blueberry pie, unionized postdocs. You: A PhD and experience in ancient DNA, paleoecology, and/or plant genetics and genomics.

📣🧬 Postdoc Alert🧬📣 We are hiring a 2+ year NERC-funded postdoc at Edinburgh Uni investigating causes and consequences of sex differences in recombination in house sparrows in Norway. Informal enquiries welcome at [email protected] 🙂 Details here: elxw.fa.em3.oraclecloud.com/hcmUI/Candid...

postdoc alert 🚨! NIH-funded postdoc in my lab to work on Ancestral Recombination Graphs in space. Please spread the word widely in your networks, and please reach out if you're interested! (2-3yr position, start date flexible, pay/benefits good!). details here: careers.umich.edu/job_detail/2...

Northern Michigan University and my local Negaunee public library are both doing summer reading programs for adults - yay! So here’s a summer books thread. Book 1: Project Hail Mary. Liked it overall but the narrator was occasionally tiresome. #UPSummerReading2026

🚨 Job alert! We're hiring a TT Assistant Professor in the Fisheries Department at UAF @uafairbanks.bsky.social. Broad search for applicants who focus on evolution, ecology, physiology, management, or social science. No visa support availably. Apply by July 1. careers.alaska.edu/jobs/assista...

Here's to a fishy fourth 🐟

Still plenty of grading to do, but I am lichen the end of semester

Want to switch countries for a postdoc? Specifically, are you European, or are you non-European wanting to come to Europe? Now's the time to reach out to potential host labs! (It's very normal to cold-email a PI about potentially hosting -- don't be shy!)

So pleased to share that @amanda-meuser.bsky.social 's work is now published in Molecular Ecology! This was a particularly cool study, because it revealed very high rates of hybridization in a system with many closely related species.

Day 2 of the Blizzard of ‘26: deep snow drifts surround the home. The children are hopped up on sugar and have found a harmonica and a lightsaber. Worse, we’re all out of margarita supplies!

This might be the biggest snowstorm I’ve ever seen - and I’ve lived in really snowy places for my entire adult life! We’re hunkered down with our chips, cupcakes, and snow shovels, waiting to see just how much snow we get.

You might not be using the term "AI" correctly. If you have ever fit a line to data, you’ve built an artificial intelligence model. AI is much broader than chatbots. Read about how AI, Machine Learning, Deep Learning, and Large Language Models fit together. #DataScience #GenerativeAI

Cool research from @bionmu.bsky.social !

State water officials are asking towns and industry along the North Platte River to assess their water rights and whether they might have to tap into an emergency water bank. For now, those with "junior" rights must shut off their spigots, with little snow and water relief in the forecast.

Winter is getting real here!

Want to study the genomics of repeated adaptation with data from hundreds of species? New funding for non-Canadians @ grad or postdoc level. Internal competition at UCalgary with very short deadline so please get in touch ASAP!! sshrc-crsh.canada.ca/en/funding/o...

I coped with 2025 by reading and running. I read 52 books, mostly fiction. 34 new to me, 18 comfort rereads. I also ran 1,200 miles, including 2 50km races and a 43 mile fun run along Lake Superior at Pictured Rocks.

Huge congrats to my mentee @pfschwarz.bsky.social on her first first-author paper! Three-way secondary contact and mosaic hybridization in darters. Plus a bonus comparison of ddRAD vs lcWGS. @fishgenomes.bsky.social @tjnear.bsky.social #fish #evolution #genomics doi.org/10.1093/evol...

If a “little toy doll(y) that toddles and coos” is on your list, Salmonid Claus is definitely going to deliver on Day 21 of #25DaysofFishmas! We end the northwest leg of our road trip with the Dolly Varden (Salvelinus malma), a brightly colored fish + this week’s #SundayFishSketch mystery species!

✍️New blog post! Evolution Has No Plan: Why Organisms Don’t Rewrite Their DNA jenteottenburghs.wordpress.com/2025/12/18/e... The news articles on polar bears that are “rewriting their DNA in response to climate change” triggered me to write this blog post. Evolution has no foresight.

🎶I’m dreaming of a white(fish)-mas🎶 No need to just dream it! On Day 16 of #25DaysofFishmas, our road trip heads to the high country for the Bonneville Cisco (Prosopium gemmifer), a species of freshwater whitefish found only in Bear Lake on the border of southeast Idaho and northern Utah.

Are you a sucker for cheesy holiday movies? Well, you’re in good company! Day 17 of #25DaysofFishmas brings us the Largescale Sucker (Catostomus macrocheilus), a fish whose distinctive feeding habits and even scientific name - which means “large lips” - makes it perfect for mistletoe lovers 😘

Can professors enroll? Asking for a friend. Yes, that friend is me!

New from #NearLab The role of ecology in allopatric speciation of darters in the Central Highlands, USA shorturl.at/YEmxH

The beautiful shiner is a small fish (<3.5 in/9 cm) that's part of the Leuciscidae family (shiners, daces, minnows) and the Cyprinella genus - also known as sailfin shiners. Like many other Cyprinella species, male beautiful shiners are known for their vibrant breeding colors #25DaysofFishmas

I'm recruiting a Ph.D. student for Fall 2026. Interested in comparative studies and trait evolution in fishes? Send me an email with a CV and research interests. Please take a look at my website (jcorush.github.io ) for more information about my research. #hybridization #minnows #mudskippers

Mountain mullet is part of the Mugilidae family (grey mullets), a group whose members are mostly found in marine coastal waters worldwide. The mountain mullet goes against the flow (literally!) of its family by migrating far inland and spending most of its adult life in freshwater #25DaysofFishmas

Madtoms are kind of the Tiny Tim of the catfish family. #25DaysofFishmas

Suwannee bass is one of the smaller members of the black bass genus (Micropterus) typically growing only ~8 in/21 cm long - though females grow faster + reach larger sizes than males. Mature fish often have turquoise blue coloration on the cheeks/belly that's brighter when breeding #25DaysofFishmas

Like the 7 other living species of gars, Florida gar have unmistakable long slender bodies, beak-like jaws, and interlocking diamond-shaped scales. They’re one of the smaller gars, often ~2 ft (0.6 m) long - compare that to the alligator gar which can grow to nearly 10 ft (3 m)! #25DaysofFishmas

Rudolph, the red-eared reindeer! 🦌 With ears so bright, the Redear Sunfish (Lepomis microlophus) guides us into Day 2 of #25DaysofFishmas! This member of the sunfish family found throughout the southeastern US is a warm-water loving ray of sun on a cold winter day ☀️

The Christmas darter is one of ~200 species of darters (fish in a group called Etheostomatinae) that are all native to North America + mostly found east of the Rocky Mountains. Christmas darters are Tiny Tims, typically only growing <2 in (5 cm) long #25DaysofFishmas

🎶It’s beginning to look a lot like #Fishmas🎶 There’s no better fish to kick off this year’s #25DaysofFishmas than the aptly-named Christmas darter (Etheostoma hopkinsi)! We get our road trip started down in the southeastern US with this small species of fish who has big holiday spirit all year long

I'm recruiting a new master's student for fall 2026 in my lab at Northern Michigan University @bionmu.bsky.social ! Students with interests in evolution of freshwater fish are encouraged to apply. Please see our lab website lizmandeville.github.io and the attached advertisement for more information.

Amanda Sabatino, @jpjahner.bsky.social and I have a new paper on @biorxiv-evobio.bsky.social. Amanda, in her undergraduate thesis work, found variation in Colias colour phenotypes is associated with different metrics of urbanization in Toronto. www.biorxiv.org/content/10.1...

Excited to recruit a new PhD student for Fall 2026 in my lab at Cornell! Looking for someone interested in evolutionary genomics + fisheries/conservation applications. Quick timeline this year—reach out soon. More details: www.therkildsenlab.org/join-us.html

It begins!

Marquette being gorgeous. Good job @lakesuperior.bsky.social too

Capturing plankton for teaching on a crisp fall morning. Chilly, but beautiful!

Some days, this is my job. Scouting for a field lab.

My car cloned itself while I was at work! But I’m confused as an evolutionary biologist bc I thought only hybrids did that, and it’s electric! Is my car a plant? Was it parthenogenesis, gynogenesis, or kleptogenesis? Mysteries abound!

Peer review ✍️, when done properly, remains an excellent mean to improve manuscripts ✔️. Special thanks to two anonymous reviewers that helped us put together this new version! www.biorxiv.org/content/10.1...

Still possible to apply to this #post-doc position at CESAB #Montpellier. Application closing date: September 15th 2025 (12:00 PM CET) How taking intraspecific diversity and evolutionary processes into account in translocation-based programs. Please share widely #PopGen #NbS #Biodiversity

Very cool! The more we learn about the biology of sex determination, the more interesting and complicated it gets. (I rescind my previous snarky comments that birds are "simple and boring" in this department.)

Shirley Chen's paper from my lab on the dilution and amplification hypotheses regarding the biodiversity-disease relationship. onlinelibrary.wiley.com/doi/10.1002/...

This is a books recommendation thread. The air is smoky and things are dark right now, but I just finished a lovely book (“To Be Taught, If Fortunate”, by Becky Chambers). I’ve been really enjoying beautiful speculative fiction. What have you read recently that you love?

Today the air quality index where I live is 168 due to drifting smoke from wildfires. I canceled my trail run. My kid is mad at me for not letting her attend soccer camp, but really, we should all be mad at our leaders. We need climate science and clean energy policies, not cuts.