Josh Jahner
@jpjahner.bsky.social
evolutionary biologist | assistant professor at new mexico tech | probably thinking about bighorns, butterflies, baseball, or board games | he/him
I am looking for PhD students and postdocs to join my lab at the University of Pittsburgh in Fall 2027. Anyone excited about urban evolution, hummingbirds, & community engagement, please reach out! And/or find me at #AOS2026 this week! More info here: www.valentina-alaasam.com
Sometimes the butterfly gods smile down on you... A bilateral gynandromorph Common Blue at Grafton Wood, Worcs 1/8/26. @westmbms-99.bsky.social @worcswt.bsky.social @savebutterflies.bsky.social @ukbutterflies.bsky.social
1/4 In today's funding climate, every grant and fellowship matters. Based on feedback from our GSAC Community Check-In Survey, we're building a growing hub of graduate & postdoctoral funding opportunities and job boards to make them easier to find. 🧵
Nice post from Ken Hughes. Should you worry if your paper uses a strong hook to open the Introduction - but every other paper on the same topic uses the *same* strong hook?
Beware the obvious opening sentence
If you ever visit Mt St Helens in Washington, I’ve got a game you can play. Each interpretive sign that you come across is a new round. You drink win the round if the sign mentions May 18, 1980. It…
brushingupscience.com
Polymorphisms are fun to study, here is a butterfly one. Negative freq.dependence works to maintain things but where does it come from? Temporal variation works but not always! @koraklein.bsky.social and @chriswheat.bsky.social looked into this in detail. royalsocietypublishing.org/rstb/article...
Emergence time difference can create negative frequency dependence and maintain a colour polymorphism in Colias butterflies
Abstract. Many species of Colias butterflies show a female-limited colour polymorphism where the dominant Alba allele leads to white wings, faster developm
royalsocietypublishing.org
Our new paper documents highly variable hybridization outcomes across years in sulphur butterflies academic.oup.com/evolut/artic...
Temporal dynamics of color polymorphism and hybridization in Colias butterflies
Abstract. Investigations into the genetic basis of color polymorphism have played a key role in our understanding of genetic architecture and the evolution
academic.oup.com
I'm recruiting a master's student for Fall 2026 to join my lab at The University of Arizona, to work on a project investigating the population genomics and hybridization dynamics of native and invasive leopard frogs in central Arizona! 🐸 🧬 Ad with details is posted below.
We've got a big feature out today (with gorgeous photographs) about the Ukrainian conservationists working to save a herd of bison from the ongoing Russian invasion. It's about the hope that conservation can offer in times of war, and the ways that animals' lives are entangled human geopolitics.
Saving Bison as Bombs Fall - bioGraphic
Amid the destruction of war, Ukrainian conservationists remain determined to help a European bison herd persevere.
biographic.com
#Bugsky 🐙🌿 Shared with me by a fof in SoCal - this is a gynandromorph (both male & female) valley carpenter bee (Xylocopa sonorina). Females are black, males orange, so the extreme color dimorphism really stands out. Per Doug Yanega at UC Riverside, bee gynandromorphs he’s seen are mosaic instead—
"Sixty Years Later, His Scientific Dream Comes True" Press from @ucanr.edu on “Temporal Dynamics of Color Polymorphism and Hybridization in Colias Butterflies," by Joshua P. Jahner and colleagues: ucanr.edu/blog/bug-squ... Read the original study: doi.org/10.1093/evol...
Sixty Years Later, His Scientific Dream Comes True | Bug Squad
Image
ucanr.edu
Great to see this study by @sam-deakin.bsky.social and Anita Michalak published in Evolutionary Applications. Using genomic data from >750 caribou and hierarchical structure analyses, we show that genetic clusters do not align with current conservation units in western Canada doi.org/10.1111/eva....
Attendees commandeer New Mexico Tech town hall to oppose proposed Socorro data center, solar array sourcenm.com/2026/05/20/a...
Attendees commandeer New Mexico Tech town hall to oppose proposed Socorro data center, solar array • Source New Mexico
New Mexico residents commandeered a town hall to oppose to a proposal to build a data center and solar array on 10,000 acres of nearby land.
sourcenm.com
Join us at virtual #Evol2026 this Friday to hear from the finalists for the SSE Hamilton Award for Outstanding Student Presentation! This symposium is in 3 sessions starting at 11 am Eastern.
👋 👋 SSE members, I hope you'll join me May 21 for the virtual SSE Presidential Symposium: Navigating Uncertainty: Individual Resilience and Collective Action in Evolutionary Biology Pls RT to help get the word out!
💬 In the second installment of The Evolution Exchange, retired NSF Program Officer Dr. Sam Scheiner returns to discuss how to craft a successful research proposal. Watch or read the transcript here: www.evolutionsociety.org/the-evolutio...
I'm so so excited to share that the research I've done for my master's thesis is finally published in Molecular Ecology! ✨ We found that almost 1/3 of sampled Leuciscid minnows were hybrids 🐠 This includes hybrid crosses never before noted in scientific literature!! 🐟 doi.org/10.1111/mec....
Extensive Multi‐Species Hybridization Between Leuciscidae Minnow Species
Anthropogenic disturbances can disrupt ecosystems and alter species population dynamics. Interspecific hybridization is common between genetically related organisms, especially once reproductive barr...
doi.org
SSE is pleased to offer free virtual #Evol2026 registration to all SSE members residing in 152 countries and territories around the world including India, Brazil, Mexico, and Colombia. Request your free registration code today! www.evolutionsociety.org/index.php?mo...
Applications for this UA postdoc fellowship are due next week— please reach out if you’re looking for a conservation-focused postdoc and would be interested in working with me!
Lovejoy Center@lovejoycenter.arizona.edu · 8mo agoWe are thrilled to announce the #launch of the Tom Lovejoy Conservation Fellowship #postdoctoral #research program! Learn more here: lovejoycenter.arizona.edu/lovejoy-fell...
How long would you survive with no DNA? What the latest What If? video in collaboration with @minuteearth.bsky.social! www.youtube.com/watch?v=s3oL...
How long would you survive with no DNA?
YouTube video by xkcd's What If?
youtube.com
The Wyoming Game & Fish Dept. is hiring two Black Rosy-Finch technicians to conduct alpine surveys in Wyoming's high elevation mountains during June 1st to Aug 31st 2026: www.governmentjobs.com/careers/wyom.... Spread the word!
Job Opportunities | .
governmentjobs.com
I am recruiting a MS student in Biology at New Mexico Tech with an anticipated start date of Fall 2026 to work on the applied evolutionary genetics of wild populations with conservation or management concerns (butterflies, bighorn sheep). Please see the attached advertisement for more info.
Made a site comparing the sizes of living things :) The great Julius Csotonyi spent 5 months painting over 60 illustrations for the site, no ai used > neal.fun/size-of-life/
I’m recruiting a PhD and MSC student for fall 2026 working on the movement ecology and conservation of Mexican spotted owls in SW forests and rocky canyonlands. Exciting partnership with Los Alamos National Laboratory. Great vibrant lab group, high impact research! 🦉 gavinmjones.com/opportunities/
Opportunities
***PhD and MSc openings – Movement ecology and conservation*** I will periodically support graduate students, postdocs, and other staff through the Biology Department at the University of New…
gavinmjones.com
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.
Mandeville Lab
Fish are so delightfully weird. We study the evolutionary genetics and ecology of freshwater fishes, plus a few more things, at Northern Michigan University
lizmandeville.github.io
TL;DR We're looking for biology/evolution instructors in the US and Canada to test the impacts of inclusive evolutionary biology educational materials on undergraduate learning (you will be compensated). Pasting the official recruitment info in thread below. sunybuffalo.qualtrics.com/jfe/form/SV_...
Qualtrics Survey | Qualtrics Experience Management
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sunybuffalo.qualtrics.com
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...
Anthropogenic factors explain wing colour variation in Colias (Lepidoptera: Pieridae) butterflies across the Toronto urbanization gradient
Hybridization, or interbreeding between two previously diverged populations, is increasing due to human influences on the environment. Rates of hybridization might be increasing particularly quickly a...
biorxiv.org
