Happy to see the new publication of our study on the Ironcolor Shiner and understanding its genetic diversity using population genomics. link.springer.com/article/10.1...

Unique genetic diversity and differential demographics revealed in peripheral populations of a North American minnow, the Ironcolor Shiner (Alburnops chalybaeus) - Conservation Genetics

Peripheral and disjunct populations are often the result of historic geological changes in the landscape and because of the long temporal span of colonization or vicariance, they are often genetically...

link.springer.com

New paper out today! @sternarchella.bsky.social and I review how modularity and integration influence adaptive radiations and diversification. Read it here: rdcu.be/fpcSX

Glad to get this Ironcolor Shiner biogeography paper out in #ConservationGenetics! link.springer.com/article/10.1... Always a pleasure working with @rvcucalont.bsky.social Haruma Kurita, Brian Metzke, @mtanichthys.bsky.social @markdavis79.bsky.social

I am recruiting PhD students for my new lab housed in the Sam Noble Museum at University of Oklahoma! If you are interested in fish macroevolution, geometric morphometrics, specimen-based research & phylogenomics please reach out. More info here: fishdiversitylab.weebly.com Please share widely!!!

Here is every native freshwater fish species of the Azores islands. 1) The European eel. That is it! Found this individual on São Miguel Island, Azores 🇵🇹 On many remote islands only diadromous species can access the freshwater habitats resulting in low species diversity.

Stepwise loss of complexity in hagfish eyes prior to deep sea colonization royalsocietypublishing.org/rsbl/article...

Stepwise loss of complexity in hagfish eyes prior to deep sea colonization

Abstract. The hagfish eye is highly reduced, lacking pigment and a lens, and covered by soft tissue. The timing and mode of this loss of complexity remain

royalsocietypublishing.org

#ERGAReads | Whole Genome Sequencing Reveals How Plasticity and Genetic Differentiation Underlie Sympatric Morphs of Arctic Charr 🧬 🐟️ onlinelibrary.wiley.com/doi/10.1111/... #genomes #ArcticCharr #plasticity #fisheries #bioeconomy #morphs #charr @evobiouppsala.bsky.social

Whole Genome Sequencing Reveals How Plasticity and Genetic Differentiation Underlie Sympatric Morphs of Arctic Charr

Salmonids have a remarkable ability to form sympatric morphs after postglacial colonisation of freshwater lakes. These morphs often differ in morphology, feeding and spawning behaviour. Here, we…

onlinelibrary.wiley.com

There are more individuals of the deep-sea fish Cyclothone than any other vertebrate genus, maybe as many as one million billion. Distinctively ornamented ichthyoliths place the origin of Cyclothone in the greenhouse world of the early Eocene, ~55.6 Ma. royalsocietypublishing.org/rspb/article...

Crispim JL, P Argüello, GSC Silva, C Oliveira, KR Luckenbill & MH Sabaj, 2026. After eight decades: a new species of Pterobunocephalus (Siluriformes: Aspredinidae) from the upper Putumayo, Napo and Pastaza rivers, Ecuador. Neotropical Ichthyology 24:e250162.🐟🧪 doi.org/10.1590/1982...

Happy to share with you the completely updated assessment of the conservation status of Europe’s 559 known freshwater fish species. Not happy to report that nearly 50% of them are threatened. ▶️ Here is the #IUCN report 👇 sohub.io/nvoz

European red list of freshwater fishes - Publications Office of the EU

The European Red List provides a scientifically rigorous and evidence-based assessment of the regional extinction risk of selected European taxa. This includes all vertebrate species - fishes, amphibi...

sohub.io

New paper led by @taylorblack.bsky.social shows AVT modulates aggression in darter lineages with nest site territoriality and paternal care but elicits no behavioral response in a species that secondarily lost territoriality and care www.sciencedirect.com/science/arti...

Lineage-specific decoupling of arginine vasotocin-evoked aggression in male darters (Percidae: Etheostomatinae)

The repeated evolution of parental care is often accompanied by shifts in the neural circuits and hormonal pathways that regulate motivation and aggre…

sciencedirect.com

Once-Adventurous Salmon Can’t Believe She Ended Up Moving Back To Birthplace, Having A Bunch Of Kids https://theonion.com/once-adventurous-salmon-can-t-believe-she-ended-up-movi-1825827223/

Pleased to share a new phylogeny for the airbreathing or walking catfishes from the family Clariidae - part of my postdoctoral work at the AMNH in collaboration with Tobit Liyandja and Melanie Stiassny: www.sciencedirect.com/science/arti...

Tiny shellear fish in central Africa scale a 50-foot vertical waterfall using suction cups and tiny hooks. This convergent evolution places them with some island gobies and Brazilian bumblebee catfish, who all do world class bouldering. 🐟🌍 phys.org/news/2026-04...

Tiny African fish caught climbing to the top of a 50-foot waterfall

For over half a century, people in Central Africa have told tales of the fish seen climbing waterfalls, but these claims have never been officially confirmed. Now, these fish have finally been caught ...

phys.org

Finally is the paper where we present the unique genomic architectures of the Arctic codfishes out!! Nice work by @gadus-sivus.bsky.social and co-authors … @biovitenskap.bsky.social @unioslo-cees.bsky.social link.springer.com/article/10.1...

Rapid genome modifications including chromosomal fusions and large-scale inversions are key features in Arctic codfish species - Genome Biology

Background Genome evolvability involves activation of transposable elements (TEs) that result in novel genomic rearrangements, including translocations, deletions, duplications, as well as larger stru...

link.springer.com

Aging killifish show systemic inflammation and accumulating DNA damage in progenitor-like immune cells, offering a window into the evolutionarily conserved mechanisms of vertebrate immune aging. Great work from Gabriele, @mdonertas.bsky.social, and the whole team. www.nature.com/articles/s43...

Spontaneous aging-associated inflammation and genome instability in the immune system of turquoise killifish - Nature Aging

Turquoise killifish are naturally short-lived vertebrates that serve as a model system for aging. The authors show that killifish exhibit age-related transformation in the immune system, which rapidly...

nature.com

onlinelibrary.wiley.com/doi/10.1111/... Robin's new tool - looks nifty!

Combining Multiple Genetic Estimates of Ne

Researchers often use multiple genetic methods to estimate contemporary effective population size (Ne), but few formally combine estimates despite potential benefits for increasing precision. Maximis....

onlinelibrary.wiley.com

Reproductive fluids enabling cryptic female choice of paternity do not induce concomitant ejaculate-mediated paternal effects in embryos of hybridizing salmonid fishes: Lantiegne et al. 2026 @memorialu.bsky.social doi.org/10.1093/jeb/...

Reproductive fluids enabling cryptic female choice of paternity do not induce concomitant ejaculate-mediated paternal effects in embryos of hybridizing salmonid fishes

Abstract. Post-ejaculatory sexual selection in the form of cryptic female choice provides opportunities for females to bias paternity to favour preferred m

doi.org

Cool paper, turning evolutionary theory on its head - gene conversion overcomes the cost of asexual reproduction… Gene conversion empowers natural selection in a clonal fish species www.nature.com/articles/s41...

Gene conversion empowers natural selection in a clonal fish species - Nature

Analysis of the asexually reproducing Amazon molly Poecilia formosa and its sexually reproducing progenitors Poecilia mexicana and Poecilia latipinna reveals that it maintains a divergent mutational l...

nature.com

Polypterids (bichirs + ropefish) are the sister lineage of all other living ray-finned fishes. Restricted to Africa today, fragmentary fossils show they inhabited South America until at least the Paleocene. Now Late Cretaceous finds add Madagascar to the list: www.sciencedirect.com/science/arti...

Late Cretaceous bichirs from Madagascar provide the first documentation of Polypteriformes (Actinopterygii, Cladistia) in Eastern Gondwana

Fossil polypterid elements have been recovered from the Upper Cretaceous (Maastrichtian) Maevarano Formation of Madagascar. These elements document th…

sciencedirect.com

So sad 📉 - they're just gone. www.dailykos.com/stories/2026...

It's final: No Delta smelt found in annual survey for 8 years as ecosystem collapses

One of the most significant California water stories of this decade is the virtual extinction of the Delta Smelt in the wild and the collapse of the Sacramento-San Joaquin River Delta ecosystem that i...

dailykos.com

#paperalert #fishes Two closely related minnow ( #Phoxinus ) species share the same rivers — and sometimes even hybridise. But new research shows they've evolved completely different ways of determining sex. 🐟🧬 Lead author PhD student @thetemi.bsky.social @leibnizlib.bsky.social

Different sex determination systems in two closely related Eurasian minnow (Phoxinus) species - Heredity

Heredity - Different sex determination systems in two closely related Eurasian minnow (Phoxinus) species

doi.org

Contrasting diversification and invasion histories of bivalves to the deep sea: "...evolutionary pathways to deep-sea endemicity are more often shaped by multiple, independent events than by in situ diversification" royalsocietypublishing.org/rspb/article... 🧪 ⚒️ #Paleobio #EvoBio #Macroecology

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

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

NEWS from Ohio State Fish Division: You can now search our 6,000-tissue collection on our website! 🐟 mbd.osu.edu/collections/...

NEW METHODS ARTICLE: Phylogenetic GLMMs open doors to study evolution of discrete traits. We show how binary models extend to ordinal & nominal traits, using bird data, and provide tutorials to make these methods accessible to evolutionary biologists: doi.org/10.1093/jeb/... Mizuno et al.

Promoting the use of phylogenetic multinomial generalised mixed-effects model to understand the evolution of discrete traits

Abstract. Phylogenetic comparative methods (PCMs) are fundamental tools for understanding trait evolution across species. While linear models are widely us

doi.org

@jcorush.bsky.social is looking for a PhD student

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

The Klamath River is flowing free again. RES and local Indian Tribes are restoring habitat, renewing cultural ties, and leading the largest dam removal in history. 🎥 Watch the film + explore the series: contentwithpurpose.co.uk/afs/tomorrow...

Restoring the Klamath River - Tomorrow's Catch

Witness the Klamath River’s transformation as dam removal restores salmon habitat, tribal lands, and cultural connections in this historic restoration.

contentwithpurpose.co.uk