Eight poeciliid fish sp. show no difference in offspring brain size between placental and non-placental maternal strategies. Placental structure and juvenile brain size coevolution may not be a general pattern in vertebrates: Rowinksi et al. 2026 @stockholm-uni.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: Lantiegne et al. 2026 @memorialu.bsky.social doi.org/10.1093/jeb/...

Ecological harshness has a weak influence on reproductive trade-offs in a #greattit population: @lbliard.bsky.social et al. 2026: doi.org/10.1093/jeb/...

How the grey #bushchat combats parasitic eggs at different laying stages: Zhong et al. 2026: doi.org/10.1093/jeb/...

Can genome size predict adaptation to environmental change? We find that genome size explains <2% of phenotypic change. Phenotypic variance may better signal adaptability: Gorné et al. @ecoevoevoeco.bsky.social @brockuniversity.bsky.social @mcgilluniversity.bsky.social doi.org/10.1093/jeb/...

Differential investment in growth and reproduction optimises a life-history trade-off in a species characterised by alternative reproductive tactics doi.org/10.1093/jeb/... Cornwell & Neff

Absence of cytoplasmic incompatibility and high vertical #Wolbachia transmission in a neotropical #drosophilid doi.org/10.1093/jeb/... Magalhães Moreira et al.

We determined the karyotype of Echimys chrysurus from the Amazon, Brazil and discuss the speciation processes and their relationships with the high degree of karyotypic variation: doi.org/10.1093/jeb/... Oliveira da Silva et al.

New paper out in @jevbio.bsky.social Using 58 years of data, we look at the effect of environmental variation on reproductive trade-offs in great tits. With @jsmartin.bsky.social, @dzchilds.bsky.social, Ella Cole, @sheldonbirds.bsky.social, @paniw.bsky.social & Arpat Ozgul doi.org/10.1093/jeb/...

Our genome-wide study of subterranean #amphipods in Japan reveals that #Pseudocrangonyx species shows a complex history involving geographic isolation and secondary contact. Hidden evolution can provide subterranean biodiversity in the dark: Suenaga et al. academic.oup.com/jeb/advance-...

Social partners shape phenotypes in house sparrows: direct & indirect social effects covary in producer-scrounger tactics, forming a multivariate syndrome that constrains trait variation: academic.oup.com/jeb/advance-... @cdegroot.bsky.social @roriwijnhorst.bsky.social @dingemanselab.bsky.social

Individuals can fall apart into their constituent parts via evolutionary reversions in individuality, but this process can occur in two distinct ways that shape the evolution of individuality: doi.org/10.1093/jeb/... @martijnschenkel.bsky.social, @arvidagren.bsky.social & Manus Patten

Associations of dispersal traits with fecundity and clonal expansion among Japanese ant-dispersed sedges Tanaka 2025: doi.org/10.1093/jeb/...

An experimental test for ecologically dependent reproductive isolation across an avian migratory divide Blain et al. 2025: doi.org/10.1093/jeb/...

📣SUBMISSION DEADLINE APPROACHING: 📣 28th February Special Issue: Foundations of Internal Conflicts Guest Edited by @martijnschenkel.bsky.social, @arvidagren.bsky.social, @imprintedgene.bsky.social, Nina Wedell and Manus Patten For more info: academic.oup.com/jeb/pages/ca...

CALL FOR PAPERS 📣 Special Issue: #GenomeArchitecture and #Evolution, organised by @eseb.bsky.social STN "STRiVE": Find out more here: tinyurl.com/2uza525c @ruifaria.bsky.social @kaybiodiversity.bsky.social @clairemerot.bsky.social @petrnguyen.bsky.social @aruizherrera.bsky.social

Evidence for toxin-encoding coinfections driving intransitive dynamics between allelopathic phenotypes in natural #yeast populations: @tommytraverscook.bsky.social et al. doi.org/10.1093/jeb/...

PERSPECTIVE: The evolutionary potential of symbiosis Is symbiosis is a source of innovation? Which evolutionary mechanisms could explain how symbiosis drives or hinders innovation? @treyjscott.bsky.social doi.org/10.1093/jeb/...

Using #simulation, we show that mutants can invade and rescue a population faced with unsustainable environmental change. Mutants can succeed due to both #ecological and #evolvability advantages that emerge in rapidly changing, complex environments: Jeremy Draghi doi.org/10.1093/jeb/...

Heat can make #fruitfly males sterile at temperatures below their lethal limits. We explore if tissue-specific heat shock protein expression can explain why using 6 #Drosophila species: @chsmithson.bsky.social et al. @ejduncan.bsky.social @amandabretman.bsky.social doi.org/10.1093/jeb/...

February issue of @jevbio.bsky.social online now! Read it here: academic.oup.com/jeb/issue/39/2 📸 Juvenile Brown Anole (Anolis sagrei) perched on a branch. Photo Credit: C. Ashlyn Crain.

Do you like your learned society and what it does for you and your research community? Then publish in their journal! This paper by @nicolasgaltier.bsky.social & Co shows that it will only do good, and comes with a handy database of academy-friendly journals. 👇

NEW PAPER with @arvidagren.bsky.social and Manus Patten on evolutionary reversions in individuality now out (as an advance article) at @jevbio.bsky.social (see academic.oup.com/jeb/advance-...). Thread below! [1/8] .

Responsible publication of your research! To help you do this @nicolasgaltier.bsky.social and coauthors have put together a handy database of academia-friendly journals, DAFNEE. You can read about it in their article recently published in @jevbio.bsky.social: doi.org/10.1093/jeb/...

During directional selection, advantageous trait values tend to become associated with earlier reproduction, accelerating the evolutionary response of the trait mean. This can lead to directional change even after selection has stopped: Mitteroecker (2025) doi.org/10.1093/jeb/...

Comparative studies on genetic differentiation between two closely related species of #Drosophila; D. bipectinata and D. malerkotliana: Singh et al. (2025) doi.org/10.1093/jeb/...

Are Darwin's finches affected by climate change? Time-series analyses of beak and body traits, precipitation and temperature show finches are a resilient system, responding mainly to short-term weather variation rather than to long-term climate change: Carrión et al. (2025) doi.org/10.1093/jeb/...

A formal theory of group-level adaptation for obligate eusociality: doi.org/10.1093/jeb/... @kztwyman.bsky.social & @andygardner.bsky.social (2025) #OpenAccess

Some Hawaiian cricket populations are losing the ability to sing. Males on Oahu invest more in sperm competition than males on Kauai by making more sperm and packing more proteins to increase sperm viability and slow female remating: @jessiectanner.bsky.social et al. (2025) doi.org/10.1093/jeb/...

Check out our latest Special Section guest edited by @mitopozzi.bsky.social and Sophie Breton: Beyond ATP: New insight into mitochondrial function and evolution 🎨 Cover image - artwork by Iain G Johnston academic.oup.com/jeb/pages/be...

Wishing all of our followers a Happy New Year 2026! We kick off with the January Issue of JEB online now: academic.oup.com/jeb/issue/39/1 📸 A sea otter (Enhydra lutris) in the water at the Toba Aquarium, Japan. Photo Credit Tomohiro Harano

📢Out now in @jevbio.bsky.social, we tried to work out whether heat limits of survival or fertility are reflected in heat shock protein expression across Drosophila 🪰 species. The answer is, well, a bit. With the wonderful @chsmithson.bsky.social @ejduncan.bsky.social doi.org/10.1093/jeb/...

Just a week left to apply for a position in our Editorial Board!

@kztwyman.bsky.social & @andygardner.bsky.social mathematically connect the dynamics of natural selection to optimisation to provide formal justification for viewing obligately eusocial colonies as adaptive individuals in their own right—that is, superorganism: doi.org/10.1093/jeb/...

CALL OPEN NOW - Would you like to join the JEB Editorial Board? 📣 Deadline for applications - Monday 19th January 📣 We'd love to receive applications from across the field of evolutionary biology!

Plant phenology is often involved in local adaptation. Genetic variation in phenology of Eurasian #Arabidopsis predicted continental patterns of natural #phenology. But locally, within regions, phenology of Arabidopsis individuals has low #heritability: doi.org/10.1093/jeb/... DeLeo et al.

Carpenter #ants possess symbiotic #bacteria that are evolving in high-altitude forests! Our sequenced endosymbionts from CA’s Sierra Nevada Mts reveal their gene losses & adaptations to montane life. #Evolution #Genomics. doi.org/10.1093/jeb/... Maynard et al @uofcalifornia.bsky.social

Impact of genotype-dependent dispersal on mutation fixation in subdivided populations: doi.org/10.1093/jeb/... Marrec, 2025 @unibe.ch @unil.bsky.social

A common garden study reveals how the waterway weed seep #monkeyflower (Erythranthe guttata) in New Zealand uses adaptive plasticity to increase seed output in high nutrient conditions: doi.org/10.1093/jeb/... Millar & Chapman

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.

It’s time to publish responsibly! (And has been for a while, quite frankly...) To help you do so, @nicolasgaltier.bsky.social and coauthors have put together a handy database of academia-friendly journals, DAFNEE. You can read about it in their article just out in @jevbio.bsky.social.

Delighted to publish Forum Article by @nicolasgaltier.bsky.social et al: "Journals run by learned societies or universities have more ethical policies while being cheaper and similarly cited" doi.org/10.1093/jeb/... Thank you for choosing JEB - we encourage the support of #societyjournals

Our paper in a great journal!

For cannibalistic #dragonfly larvae, chemical cues from conspecifics can signal either danger or dinner, shifting behavior from self-defense to foraging. This causes nonlinear, density-dependent effects on heterospecific prey: Sysiak et al.: doi.org/10.1093/jeb/...

Separating the genetic and environmental drivers of body temperature during the development of endothermy in an altricial bird #sparrows doi.org/10.1093/jeb/... @lucywinder.bsky.social et al.

Eye size across avian lineages covaries with participation in a specialized foraging behaviour: Ausprey et al. 2025 @thecowbirdlab.bsky.social doi.org/10.1093/jeb/...

How do short-lived plants colonize new habitats? In L. longirostris, adaptation during range expansion likely relied on standing variation, showing how existing diversity facilitates adaptation: Mayol et al 2025 doi.org/10.1093/jeb/... @creaf.cat @inrae-france.bsky.social @univbordeaux.bsky.social

Multigenerational exposure to high-fat and high-sugar diets exacerbates reproductive distress in an insect model doi.org/10.1093/jeb/... Merkel et al. 2025 @jellers.bsky.social

Are you an evolutionary biologist? Would you like to support your society journal? We are looking for new editorial board members across the field of evolutionary biology: 🧬🌿🪰🐀🦀🔬🧫🦠🐟🐦🧑‍💻🪸🦎 Learn more and find out how to apply: jevbio.net/call-for-edi... DEADLINE 19th January 2026 📣

Thermal physiology meets quantitative genetics - our new paper explores the drivers of body temperature in nestling sparrows #ornithology @jevbio.bsky.social academic.oup.com/jeb/article/...