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Tim Janicke

@timjanicke.bsky.social
964 followers 307 following 25 posts

Evolutionary biology | Behavioural ecology | Sexual selection @CNRS, CEFE, Montpellier

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Reposted by Tim Janicke
João Menezes @jocateme.bsky.social · 29/09/2026
Our new paper on bird vocal amplitude is out in @sse-evolution.bsky.social ! Across 123 species, we found two new contenders for world’s loudest bird: bare-throated bellbird and seriema Along with the white bellbird, both can reach jackhammer-level amplitudes! doi.org/10.1093/evolut/qpag153
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MPI for Biological Intelligence @mpiforbi.bsky.social · 29/09/2026
Female ruffs grow faster and fledge earlier, shifting the sex ratio from hatching to fledging: Read the new paper from the Küpper & Kempenaers groups!
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The Guardian @theguardian.com · 26/09/2026
‘Birdwatching is close to rapture’: Margaret Atwood on why she has given C$1m to avian research
theguardian.com
‘Birdwatching is close to rapture’: Margaret Atwood on why she has given C$1m to avian research
Award-winning novelist celebrates late partner’s love of birds with gift to establish the Graeme Gibson chair in avian biology
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Journal of Evolutionary Biology @jevbio.bsky.social · 24/09/2026
In #Drosophila subquinaria, divergence in male chemical signaling isn’t driven by sexual selection alone—genetic constraints can significantly limit future evolutionary responses @uottawascience.bsky.social Jarvis & Rundle 2026 doi.org/10.1093/jeb/...
doi.org
The contribution of sexual selection and genetic constraints to phenotypic divergence among natural populations of Drosophila subquinaria
Abstract. Evolutionary trajectories are determined by selection and the underlying genetic architecture of additive genetic variances and covariances for t
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Tom Ratz @tomratz.bsky.social · 23/09/2026
Our new paper is out in @jevbio.bsky.social! Body size shapes aggression as well as how strongly individuals influence their opponents and how responsive they are to social interactions. @cdegroot.bsky.social @roriwijnhorst.bsky.social @dingemanselab.bsky.social doi.org/10.1093/jeb/...
Size-mediated differences in social responsiveness (left) and social impact (right). Here, individual i is smaller, more responsive to variation in opponent body size and elicits more aggression from opponents than individual j.
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Erik Postma @erikpostma.bsky.social · 23/09/2026
Delighted to see this mammoth effort led by @sevans.bsky.social, together with @mevisser.bsky.social, Arie van Noordwijk and Henri Bouwmeester out in @plosbiology.org.
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Max Planck Institute for Plant Breeding Research @mpipz.bsky.social · 17/09/2026
📣📣Paper Alert! New paper @nature.com from the Marques group @amarques.bsky.social and colleagues on Rhynchospora tenuis - 🌿a plant that reproduces sexually but has completely lost the reshuffling of DNA🧬 Congratulations! 👏 🥳 Read more👉 www.mpipz.mpg.de/pr-marques-2... www.nature.com/articles/s41...
nature.com
Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis - Nature
Rhynchospora tenuis undergoes obligate, genome-wide achiasmy in both male and female meiosis.
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Matthew Silk @mattjsilk.bsky.social · 15/09/2026
Fantastic to see our first paper on Soay sheep social networks now published in @royalsocietypublishing.org - tinyurl.com/mry3mtpf Check out this thread from @erinsiracusa.bsky.social to find out more!
tinyurl.com
Environment-dependent benefits of sociality in Soay sheep
Abstract. Although strong evidence links social connectedness to improved fitness, there is pronounced among-individual variation in social behaviour. This
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Ted Morrow @tedmorrow.bsky.social · 15/09/2026
Registration is open for Evolution in Sweden 2027, that will be held in Karlstad 11-13 Jan 2027. It gathers together evolutionary biologists working in Sweden at all career stages. More details here: sola.kau.se/evolutionins...
sola.kau.se
Evolution in Sweden 2027
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Royal Society Publishing @royalsocietypublishing.org · 12/09/2026
The Eurasian dotterel is a sex-role reversed bird, in which males typically perform all incubation and offspring. New research in #ProcB found that females of the socially polyandrous shorebird visit multiple breeding sites within a single season: doi.org/10.1098/rspb... Image: Terje Lislevand
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David S Richardson @david-s-richardson.bsky.social · 10/09/2026
Can sex help save species? Our new paper in PNAS suggests it can. lnkd.in/esc4fidf www.uea.ac.uk/about/news/a... Implications for evolution and conservation @mdpointer.bsky.social @nashalselection.bsky.social @alexeimaklakov.bsky.social
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Luis-Miguel Chevin @lmchev.bsky.social · 09/09/2026
Now out in PNAS: our latest exploration of the interplay between interspecific interactions and adaptation to a changing abiotic environment! This time it’s about predator-prey interactions. www.pnas.org/doi/10.1073/...
pnas.org
Coadapting but not static predators facilitate prey adaptation to a fluctuating environment | PNAS
Understanding how between-species interactions influence adaptation and population persistence in the face of environmental change is one of the gr...
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Bibiana Rojas @biobiiana.bsky.social · 08/09/2026
So proud of Edina Nemesházi for this fantastic work about the consequences of sex reversal for the reproductive success of wild frogs, which is now out in Science Advances! 🥂💥🥳Congrats to all of the authors 👏 @klivvvienna.bsky.social www.science.org/doi/10.1126/...
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David López-Idiáquez @davididiaquez.bsky.social · 01/09/2026
New preprint out in @biorxivpreprint.bsky.social with @devisatarkar.bsky.social and @sheldonbirds.bsky.social in which we analyse the effects of this summer's unprecedented and severe #heatwave on tit reproduction and mass. www.biorxiv.org/content/10.6...
biorxiv.org
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Eric Topol @erictopol.bsky.social · 01/09/2026
Ovarian aging and the "leaky gut" "These findings provide the strongest evidence to date that menopause may promote gut barrier dysfunction and microbial translocation in otherwise-healthy women." jci.org/articles/vie...
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Thomas Lenormand @thomaslenormand.bsky.social · 01/09/2026
🚨Interested in #evolutionary #genomics and #popgen #theory? My lab just opened a 1+ year #postdoc position to work on sex chromosome dosage compensation. At #CEFE in beautiful Montpellier. Deadline soon, don't be shy, apply, theory is exciting! 👉 bit.ly/4eMWDIh
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Andy Gardner @andygardner.bsky.social · 27/08/2026
New paper: "Sexual conflict and sexual pleiotropy" (#OpenAccess), with Thomas Hitchcock (@imprintedgene.bsky.social), Tracey Chapman & Jennifer Perry (@jennyperry.bsky.social) doi.org/10.1098/rspb... @royalsocietypublishing.org @standrewsopenres.bsky.social #OA
Illustration of the distinction between sexual conflict and sexual pleiotropy. (A) Sexual conflict: a male and female disagree over a jointly produced phenotype, for example whether a female releases more eggs after mating or withholds resources for future reproduction. Releasing more eggs now costs the female but benefits the male, who will not sire her future offspring. Sexual conflict occurs when selection favours female withholding and male-induced release. (B) Sexual pleiotropy: males and females are favoured to express different values of a trait encoded by genes expressed in both sexes. An allele associated with larger body size may benefit male carriers while harming female carriers or vice versa. Antagonistic sexual pleiotropy occurs when selection favours opposite alleles in each sex.
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Izzie Héjja-B. @izziehb.bsky.social · 27/08/2026
🚨New paper out after several years in the making! "Background-matching patterns are attractive: support for a processing bias" with @tamramendelson.bsky.social, @julien-renoult.bsky.social, Innes Cuthill (CamoLab alumni), Michel Raymond (@isemevol.bsky.social) ▶️ doi.org/10.1016/j.an... 📷 Ed Nisley
Gray tree frog on concrete. It is well camouflaged and not so easy to see.
Photo credit: Ed Nisley’s Blog [https://softsolder.com/] ©2025 by Ed Nisley is licensed under CC Attribution-NonCommercial-ShareAlike 4.0 International
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Hanna Kokko @kokkonut.bsky.social · 26/08/2026
Come and work with us (the Kokkonuts) as a postdoc! Our research within (theory-evo-eco) is broad; let's say it's implicitly defined by the journal club papers we read. Which is why the application process includes a JC-related task, I hope it'll be a fun one for you! www.evoldir.net/brian/evoldi...
evoldir.net
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Dr. Catherine Scott @cataranea.bsky.social · 24/08/2026
Cool #postdoc opportunity to study sexual behaviour in widow #spiders! 🕷️🕷️🕷️ @arachnology.bsky.social @britishspiders.bsky.social @entsocamerica.bsky.social @royentsoc.bsky.social @canentomologist.bsky.social
HOW MANY TIMES DID SEXUAL CANNIBALISM AND MALE SELF-SACRIFICE EVOLVE?

We are searching for an outstanding postdoc with a background in behavioural and evolutionary ecology to join an exciting project comparing sexual behaviour across all widow spider species at Ben-Gurion University.

THE PROJECT INCLUDES:
Literature survey of sexual behaviour and life history in widow spiders
Locating widow spider populations across the globe
Fieldwork in natural populations
Spider rearing and maintenance
Behavioural observations of mating interactions and outcomes
Integrating behavioural, morphological, ecological and phylogenetic data to reconstruct evolutionary trajectories and uncover coevolutionary relationships
JOIN OUR MISSION TO UNCOVER THE EVOLUTION OF SEXUAL BEHAVIOUR IN WIDOW SPIDERS

INTERESTED? GET IN TOUCH!
Send your CV and a short statement of research interests to Michal Segoli, Ben-Gurion University, msegoli@bgu.ac.il
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Tim Janicke @timjanicke.bsky.social · 23/08/2026
Great talk earlier this month by Carole Hooven on the binary conception of #BiologicalSex, and on the folly of moralizing scientific insights. @NIH Scientific Freedom Lecture Series: videocast.nih.gov/watch/6f8729...
videocast.nih.gov
NIH VideoCast - NIH Scientific Freedom Lecture Series: The Reality of Human Sex Differences: Why It Matters for Science, Medicine, and Policy, and Why We Need to Talk About It
This lecture series is designed to promote the principles of gold standard science by providing a formal venue for thoughtful discussion of complex scientific topics. Each session will highlight areas...
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Ophelia Fritsch @opheliasfritsch.bsky.social · 21/08/2026
Our Quick Guide on Copulatory Courtship is out in Current Biology @currentbiology.bsky.social: doi.org/10.1016/j.cu.... Find out more about the wonderful female and male interactions that occur during copulation and how these behaviours can be crucial for successful reproduction.
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Judith Mank @judithmank.bsky.social · 20/08/2026
Latest from the lab: Conserved sex-biased DNA methylation patterns target key developmental genes and reproductive function in two Poeciliid species. This one took a while to get there, but well worth the wait! Led by Dave Metzger. academic.oup.com/g3journal/ad...
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Charles Mullon @charlesmullon.bsky.social · 19/08/2026
With @ewanflintham.bsky.social @thomaslesaffre.bsky.social and @sarperotto.bsky.social we've been thinking about what theory tells us about sexual antagonism (SA = when selection favours different trait values in females and males). Our review is here: tinyurl.com/ct5mk8mv
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Will Allen @wlallen.bsky.social · 19/08/2026
New Paper: Ornaments evolve faster than weapons Combining a new theoretical model of sexually selected trait evolution with comparative analyses across ten clades, we suggest that drift in female preferences accelerates the rate of ornament evolution. royalsocietypublishing.org/rspb/article...
royalsocietypublishing.org
Ornaments evolve faster than weapons
Abstract. We investigate the evolutionary dynamics of sexually selected traits using both a mathematical model and comparative analyses, focusing on the re
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Liam Dougherty @liamdougherty.bsky.social · 07/08/2026
New pre-print led by the amazing @patricepottier.bsky.social - very little evidence for evolution of life history traits in response to warming, even in insects. Rapid adaptation is unlikely to mitigate the continuing impacts of climate change 🔥🔥🔥
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Martin Garlovsky @martingarlovsky.bsky.social · 07/08/2026
Very happy to see our paper just published in @molbioevol.bsky.social highlighted: academic.oup.com/mbe/article/... Probably my favourite paper to be a part of and really fun working with some great people! Bedbugs are very gross but also very cool! Paper here: academic.oup.com/mbe/article/...
academic.oup.com
Highlight: Traumatic insemination and the molecular evolution of a novel reproductive organ in bed bugs
Sex can be complicated—just ask bed bugs. The bane of many conference goers, these blood-feeding parasitic insects mate via traumatic insemination, a repro
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Charles Mullon @charlesmullon.bsky.social · 03/08/2026
Looking for an Associate Prof position? Interested in behavioural ecology & cultural evolution? Come join us at the Dpt of Ecology and Evolution in Lausanne🇨🇭 @dee-unil.bsky.social @unil.bsky.social! Great department & great place to live. Pls RP. Apply here: wwwfbm.unil.ch/releve/appli...
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Alexei Maklakov @alexeimaklakov.bsky.social · 30/07/2026
Trade-offs Between Intergenerational and Transgenerational Effects: experimental data and demographic simulation model of multigenerational trade-offs in evolution: academic.oup.com/evlett/advan...
academic.oup.com
Evolutionary trade-offs between intergenerational and transgenerational fitness effects
Abstract. Intergenerational and transgenerational fitness effects can shape evolutionary processes. Theoretically, however, intergenerational and transgene
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Science X / Phys.org @sciencex.bsky.social · 02/08/2026
Across arthropods, sperm often work in coordinated groups rather than alone. This cooperative strategy appears to have evolved repeatedly over roughly 600 million years, but why it arises remains unclear. doi.org/hcdbx9
phys.org
A cooperative approach to reproductive success
Fertilization is often imagined as a frantic race, with millions of sperm competing for a single prize. But new research by a team of evolutionary biologists from Syracuse University, the University of Siena in Italy and the University of Szeged in Hungary reveals a more surprising reality, where success can depend less on competition and more on cooperation.
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EvoSapiens @evosapiensfr.bsky.social · 31/07/2026
#ActuSapiens juillet 2026 : les biologistes contre-attaquent ! En biologie évolutive, le sexe se définit (encore et toujours) de façon binaire : petits gamètes pour les mâles et gros pour les femelles. doi.org/10.1111/ele.70426
Illustration d'un spermatozoïde et d'une cellule ovulaire
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Science X / Phys.org @sciencex.bsky.social · 30/07/2026
Across 35 North American bird species, adult females had 12.4% lower survival than males on average. The gap was strongest in long-distance migrants, but no clear explanation emerged. doi.org/hcc5sd
phys.org
Female birds have shorter lifespans than male birds across 35 North American species, researchers find
Birds have a lot to do in their short lives: defend territories, build nests, raise chicks and feed themselves. But the toll of these activities may be greater for female birds than for male birds.
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Royal Society Publishing @royalsocietypublishing.org · 30/07/2026
Why do some deep-sea anglerfish males become permanent parasites? This #ProcB study finds that parasitic males evolve when mating opportunities are rare. doi.org/10.1098/rspb... | #Evolution #TheoreticalBiology
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Hanna Kokko @kokkonut.bsky.social · 30/07/2026
.The very talented and fun Jonathan Henshaw has two positions to offer! If you like theoretical eco-evo questions, don't hesitate. Also, Freiburg is a very pretty place PhD: uni-freiburg.de/stellenangeb... Postdoc: uni-freiburg.de/stellenangeb...
uni-freiburg.de
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Michael Hochberg @mkhochb.bsky.social · 29/07/2026
Opinion article co-authored with Peter Thrall: "AI will reorganize science. Will research remain a human enterprise?" www.pnas.org/doi/10.1073/...
pnas.org
AI will reorganize science. Will research remain a human enterprise? | PNAS
AI will reorganize science. Will research remain a human enterprise?
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Jeff Groh @jeffgroh.bsky.social · 28/07/2026
Avocados come in 2 varieties - A-types start each day female and switch to male midday. B-types do the reverse. In work just published from the last chapter of my PhD, we show this system evolved 40+million yrs ago and is regulated by alleles of 1 transcription factor www.pnas.org/doi/10.1073/...
pnas.org
Balanced polymorphism in a floral transcription factor underlies the ancient rhythm of daily sex alternation in avocado | PNAS
In avocado and certain wild relatives in Lauraceae, a highly synchronized daily rhythm of floral sex timing promotes cross-pollination between two ...
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Laurine Mathieu @laumathieu.bsky.social · 28/07/2026
Our paper is now out! Thanks to @annecharmantier.bsky.social , Samuel, Ségolène, Emilie, Baptiste, the whole zoo team, and the Montpellier tit team 🕊️
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Ethological Society @ethoges.bsky.social · 27/07/2026
🧪 ETHOLOGY: Can female birds hear if a male is already taken? 🐦🎶❤️ Lampe et al. show female pied flycatchers distinguish between songs of unmated and already-mated males, preferring bachelors and avoiding polyterritorial males trying to attract a second mate. #OpenAccess: doi.org/10.1111/eth.70088
doi.org
Female Pied Flycatchers <fi>Ficedula hypoleuca</fi> Can Discriminate Between Songs of Unmated and Mated Males and Avoid Being Deceived Into Polygyny
We recorded songs of male pied flycatchers when they were unmated (twice) and when the same males were mated and displaying on a secondary territory. The syllable switching was much higher after mati...
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Marta Mosna @marta-mosna.bsky.social · 24/07/2026
Females hyenas have greter reproductive inequality due to social inheritance of privilege! The study I presented at @isbe2026.bsky.social and done with the @hyenaproject.bsky.social came out finally!! Check it out! www.science.org/doi/10.1126/...
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Science X / Phys.org @sciencex.bsky.social · 23/07/2026
After six generations, virtually all spotted hyenas in a clan trace back to an alpha female line. Across generations, reproductive inequality shifts toward females, a pattern far weaker through fathers. doi.org/hccfsz
phys.org
When mothers make the winners: How alpha female lineages dominate hyena clans
In mammals, males are usually stronger and more competitive than females. Males also show greater inequality in reproductive success—the number of offspring they produce—than females.
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Journal of Evolutionary Biology @jevbio.bsky.social · 23/07/2026
New research in red flour beetles shows that sexual conflict is condition-dependent: high-condition males inflict more harm, while high-condition females resist it better. Findings reveal sex differences in adaptation may shape evolutionary outcomes: doi.org/10.1093/jeb/... Gómez-Llano 2026
doi.org
Individual condition mediates the costs of sexual conflict through both male harm and female resistance
Abstract. Sexual conflict arises when the reproductive interests of males and females diverge, leading to decreased female fitness due to male‐induced harm
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Krish Sanghvi @krishsanghvi11.bsky.social · 23/07/2026
We refine & extend the Y-model heuristic (“mean invariance” hypothesis) to explain why resource limitation reveals tradeoffs + suggestions for what empiricists should measure (hint: it’s not average resource availability in a population, or solely variation in acquisition-allocation). Now in JEB
academic.oup.com
Influence of the resource acquisition–allocation Y-model’s parameters on the detection of phenotypic trade-offs
Abstract. Phenotypic trade-offs, predicted to occur due to resource limitation, are not commonly detected. For this, the Y-model provides a powerful heuris
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hannahcole04.bsky.social @hannahcole04.bsky.social · 22/07/2026
Do humans and birds share an eye for design? 🐦🎨 For my Master's diss, I’m testing if we share aesthetic tastes with bowerbirds. I need 100 responses to finish! Visual, anonymous & under 5 mins. Link: exe.qualtrics.com/jfe/form/SV_... 🧪 cc: @scienseed.com #AcademicSky #SciComm
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Thomas MacGillavry @thomasmacgillavry.bsky.social · 20/07/2026
Ever wondered what the bizarre dances of male birds of paradise look like to females? Check out our new preprint! @izziehb.bsky.social @fusanilab.bsky.social “The geometry of visual signaling in a bird-of-paradise” ecoevorxiv.org/repository/v...
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Erik Svensson @evolodonata.ecoevo.social.ap.brid.gy · 18/07/2026
My latest Substack post: open.substack.com/pub/professorerik…
professoreriksvensson.substack.com
On the diversity of females in the animal kingdom
Our recent article about the origin, genomics and evolution of female-limited polymorphisms in animals document a widespread phenomenon, with implications for evolutionary biology and society.
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Ana Cristina Gomes @anacrgomes.bsky.social · 17/07/2026
📢 New paper alert! 📢 We found that sex-specific loss, rather than independent evolution, drive plumage pattern dimorphism in Estrildidae, with João Pacheco, Gonçalo Cardoso @mostlywaxbills.bsky.social , and Michael Sorenson, at Evolution academic.oup.com/evolut/artic... (1/7)
academic.oup.com
Evolution of sexually dimorphic plumage patterns in estrildid finches
Abstract. Pigmentation patterns aid in camouflage and may also serve for communication. To understand the evolution of different types of within-feather pi
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Tim Janicke @timjanicke.bsky.social · 18/07/2026
Why is there so much unconstructive and vitriolic rhetoric in the discourse about the definition of biological sex? Hooven & Byrne's recent paper “Sex, Medicine, and Moralization” offers some compelling answers: philpapers.org/rec/HOOSMA
philpapers.org
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Tim Janicke @timjanicke.bsky.social · 11/07/2026
In a new #Viewpoint we argue that the binary definition of #BiologicalSex based on gamete size is a scientifically robust framework that is entirely compatible with the diversity of sexual phenotypes and human gender identities. onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Biological Sex Is Binary and Rooted in Anisogamy
Drawing on empirical evidence and evolutionary theory, we argue that biological sex is most coherently defined as a binary classification of reproductive strategies rooted in anisogamy (the productio....
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Bob Wong @bbmwong.bsky.social · 10/07/2026
Do you have a background in behavioural ecology and are you interested in doing a PhD in Australia? I’m looking for new grad students so check out our website (BobWongLab.org) or come find me in Torino at #ISBE2026. 🐟🐠
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Paul Dufour @pauldufour80.bsky.social · 08/07/2026
🐦🌙 Happy to see this big collaborative paper out in @currentbiology.bsky.social! We address a seemingly simple question using geolocator data collected across many species and individuals: how much of bird migration actually happens at night? www.cell.com/current-biol... A short🧵
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