Dan MacGuigan

Whoa, never thought I'd have research featured on Jeopardy!

Whoa! Need to find a way to work that into my CV, haha!

Here’s the @jeopardyofficial.bsky.social GAR question based on our team’s living fossil study (led by @chasedbrownstein.bsky.social @dmacguig.bsky.social)!

GitHub - dmacguigan/PhenoDelimit: R package to create "STRUCTURE-esque" barplots and compare species delimitation models with multivariate phenotype data R package to create "STRUCTURE-esque" barplots and compare species delimitation models with multivariate phenotype data - dmacguigan/PhenoDelimit

GitHub repo for the PhenoDelimit package: github.com/dmacguigan/P...

With coauthors Adam Taylor, Ava Ghezelayagh, Julia Wood, Jeff Simmons, Jon M. Mollish, and @tjnear.bsky.social

Genomic and Phenotypic Delimitation of Species in a Temperate Aquatic Biodiversity Hotspot Abstract. Biologists have relied on morphological characteristics to identify, define, and formally describe species for the past 250 years. The advent of

Check out our new paper! We debut the #R package PhenoDelimit, a simple #ML approach to morphological species delimitation without a priori lineage assignment. Plus we describe a new darter species, 𝘼𝙡𝙡𝙤𝙝𝙞𝙨𝙩𝙞𝙪𝙢 𝙖𝙣𝙖𝙨, endemic to the Duck River system in TN.
doi.org/10.1093/sysb...
#fish #genomics

Mosaic tri-lineage secondary contact shapes diverse genomic outcomes in darters Abstract. Speciation does not always lead to complete reproductive isolation, which can result in hybrid zones with gene flow. In freshwater fishes, second

I am very excited to share our new paper with my amazing co-authors and mentors @dmacguig.bsky.social @fishgenomes.bsky.social @tjnear.bsky.social . We investigate a secondary contact zone in #darters. track.smtpsendmail.com/9032119/c?p=...

Map and phylogeny of complex hybrid zone between two darter species

Comparison of Fst estimates from ddRAD vs lcWGS

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...

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

This is one of the most demented things Trump has posted

With my fantastic co-authors @fishgenomes.bsky.social, Hannah Waterman, Jessie Pelosi, Nate Backenstose, Sarah Chang, @mtanichthys.bsky.social, and @almeidasilvaf.bsky.social

Check out our new preprint! We compare sequence versus synteny approaches for resolving a challenging #phylogenetic problem. In this case, synteny is far more informative! Also includes the first chromosome-level #genome for the enigmatic #fish family Gyrinocheilidae. doi.org/10.1101/2025...

Two long grayish-colored fish with orange fins and orange spots along their body rest on what looks like a mossy rock.

Just a pair of Gold-spotted Mudskippers (Periophthalmus chrysospilos) doing their semiaquatic thing.

📷 nitiroj_boonsai on iNaturalist
📍 Thailand
🔗: www.inaturalist.org/observations...
#ObservationOfTheDay

Graph of NSF awards. Compares April 2024 to April 2025, which levels off.

In addition to the terminations of existing awards, new NSF grants are still stopped completely since DOGE was granted access to systems a week ago.

Last Thursday, an agency spokesperson said "NSF continues to issue awards." That does not appear to be the case.

Thank you @sse-evolution.bsky.social! Thrilled to have our paper recognized.

Layoffs hit federal climate, weather agency NOAA The cuts could affect NOAA's weather forecasts, climate research and other functions.

A source just told me over the phone that layoffs are happening right now at NOAA. Axios is also reporting this. www.axios.com/2025/02/27/l...

USAID staff have two days to clean out their offices at the agency’s former headquarters in DC.

People are gathering on the sidewalk in the rain to show their support, applauding workers as they pass by.

Doge staffers enter Noaa headquarters and incite reports of cuts and threats Members reportedly sought access to IT systems at agency that Project 2025 has called ‘harmful to US prosperity’

“They apparently just sort of walked past security and said: ‘Get out of my way,’ and they’re looking for access for the IT systems, as they have in other agencies,” said a former Noaa official. “They will have access to the entire computer system, a lot of which is confidential information.”

Very grateful to have contributed to this important research!

1/4New from the #NearLab, genomics and morphology demonstrate the famous Snail Darter, Percina tanasi, the little fish that swam to the United States Supreme Court is not a distinct species...

Open access at Current Biology
www.cell.com/current-biol...

Marine institutes and University departments doing marine research, join the conversation here. Only official organisations

go.bsky.app/K7HxGsK

Thanks!

I’m working on a starter pack of ocean science and conservation accounts who post regularly and cover a variety of geographic and disciplinary perspectives.

Follow these fine folks. 🦑🌎🧪🐠

go.bsky.app/HYBnbQn

You are so welcome- there are so many amazing women that now there are two starter packs!! go.bsky.app/4wMsfX4

Thanks @tessahill.bsky.social for creating this one! 🌏🌊💪💙

go.bsky.app/7MdiLgo

Mind adding me too?

I hope federally funded scientists are preparing for large scale, bad faith attacks by Musk and his troll army.

It’s pretty clear the DOGE operation is going to take snippets of grant proposals and papers, present them out of context, and direct weaponized harassment of individual people.

Elon Musk takes far more federal dollars with far less oversight than any of the public scientists facing attacks.

People who come under attack should respond by making sure anyone listening knows how much federal money Musk makes, and how he shields it from scrutiny.

Could God make a demographic history so complex even she couldn't estimate N_e

Is "clean-burning" coalescent a myth?