Tim Janicke
LightNews LightNews
timjanicke.bsky.social
Tim Janicke
@timjanicke.bsky.social
830 followers 270 following 14 posts
Evolutionary biology | Behavioural ecology | Sexual selection
@CNRS, CEFE, Montpellier
Posts Replies Media Videos
Reposted by Tim Janicke
djmmeeg.bsky.social
Darwin speculated that it was energetically costly to be an hermaphrodite. He thought that might explain why they were relatively rare in animals. Our paper out today tested this conjecture for the first time.
royalsocietypublishing.org/rspb/article...
Hermaphrodites have lower metabolic rates than gonochores
Abstract. Hermaphroditism, where an individual can reproduce as both male and female, offers some clear reproductive advantages. Simultaneous hermaphroditi
royalsocietypublishing.org
December 11, 2025 at 1:13 AM
Reposted by Tim Janicke
rmcelreath.bsky.social
I'm teaching Statistical Rethinking again starting Jan 2026. This time with live lectures, divided into Beginner and Experienced sections. Will be a lot more work for me, but I hope much better for students.

I will record lectures & all will be found at this link: github.com/rmcelreath/s...
course schedule as a table. Available at the link in the post.
December 9, 2025 at 1:58 PM
Reposted by Tim Janicke
lmchev.bsky.social
Kudos to @pdevillemereuil.bsky.social for writing a blog post about our paper published earlier this years in the one and only @peercomjournal.bsky.social ! You want to know how genetically variable plasticity is in your fav system, and what components of reaction norm shape vary the most? Try this!
December 10, 2025 at 11:18 AM
Reposted by Tim Janicke
alisonpischedda.bsky.social
New paper out from our lab today in Biology Letters! This work, led by our former lab tech @avigayillev.bsky.social and lab alum Isabella Martinez, used hemiclonal analysis to show that longer matings with previously mated females are advantageous to males!
doi.org/10.1098/rsbl...
Longer matings increase male competitive fertilization success in Drosophila melanogaster
Abstract. Copulation duration is a variable behaviour that is often extended by males beyond the time needed for sperm transfer. In many insect species, th
doi.org
December 10, 2025 at 1:44 PM
Reposted by Tim Janicke
roliroberts.bsky.social
Do you find this image attractive? Then you're probably a male #bonobo, looking for a mate. But as this @plosbiology.org study shows, things are more complicated, and a swollen butt may not be as reliable a sign of fertility as it seems...
A female bonobo with striking anogenital swelling, indicating fertility. Credit: PH Douglas.
December 10, 2025 at 2:27 PM
Reposted by Tim Janicke
maxreuter.bsky.social
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.
December 9, 2025 at 10:56 AM
timjanicke.bsky.social
Just one week left to submit your abstract for our symposium on eco-evolutionary dynamics of #sexualselection and #sexualconflict at @ece2026tours.bsky.social ! Join us in beautiful Tours, France, 29 June – 3 July 2026!
timjanicke.bsky.social Tim Janicke @timjanicke.bsky.social · 22d
Excited to announce our symposium on eco-evolutionary dynamics of #sexualselection & #sexualconflict at the XIII European Congress of Entomology (29 June–3 July 2026, Tours, France), co-organised with Lucas Marie-Orleach!

Call for abstracts is open until 15 Dec 2025.

www.ece2026.org
ECE 2026 - XIII European Congress of Entomology
It is our great pleasure to welcome you to Tours, France, in the heart of the Loire Valley, from June 29 to July 3, 2026.
www.ece2026.org
December 9, 2025 at 9:56 AM
Reposted by Tim Janicke
dudumizi.bsky.social
Our new article how sex roles shape androgen and hematocrit profiles (or the other way round?) of classically polyandrous red phalaropes and polygynous pectoral sandpipers
academic.oup.com/beheco/advan...
Sex differences in testosterone and hematocrit levels reflect mating system differences of two Arctic-breeding shorebird species
Differences in mating strategies are often accompanied by differences in physiology. In two species of shorebirds, we found that testosterone levels reflec
academic.oup.com
December 8, 2025 at 12:37 PM
Reposted by Tim Janicke
judithmank.bsky.social
Please help! We are looking for tissue-specific RNA-seq datasets or pubs with both male and female individual gene expression data, not pooled, from animal species. If you know of any relevant resources, please drop a link in the comments or send me a DM. Also, please help spread the word - thanks!
December 5, 2025 at 3:20 PM
Reposted by Tim Janicke
ece2026tours.bsky.social
Interested in insect evolutionary genetics?🧬🪰
Come at #ECE2026Tours, to explore sexual selection and conflicts, phenotypic plasticity, host–microbiome dynamics, genetic variation and selection with keynotes incl. Pau Carazo, Patricia Beldade, Kelley Leung and Hassan Salem

More info www.ece2026.org
December 5, 2025 at 8:22 AM
timjanicke.bsky.social
Not sure our paper rocks as much as Katharina’s cover illustration, but we’re very delighted it was picked as ‘Editor’s Choice’ on @evolletters.bsky.social!
evolletters.bsky.social Evolution Letters @evolletters.bsky.social · 6d
Check out our cover article by @timjanicke.bsky.social and colleagues about the role of sexual selection in animal speciation. academic.oup.com/evlett/artic.... The beautiful illustration is by Katharina Bóth.
December 4, 2025 at 5:03 PM
Reposted by Tim Janicke
maxreuter.bsky.social
It’s that time of the year again: we are looking for a new cohort of @jevbio.bsky.social editors. Join our board and support your #SocietyJournal!
jevbio.bsky.social Journal of Evolutionary Biology @jevbio.bsky.social · 7d
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 📣
December 4, 2025 at 12:56 PM
Reposted by Tim Janicke
alexanderlees.bsky.social
Huge News from the Western Amazon: it's the year 2025 and we are still describing entirely new, strikingly-distinctive large-bodied bird species! Behold Tinamus resonans sp. nov. the Slaty-masked Tinamou mapress.com/zt/article/v... #Ornithology @tetzoo.bsky.social 🪶
Photo montage of Tinamus resonans sp. nov., a new species of tinamou from the montane forests of the Serra do Divisor, western Amazonia, Brazil. The species is distinguished by a unique combination of plumage pattern, vocal repertoire, and ecological characteristics, including a conspicuous dark slate facial mask, vivid rufous-cinnamon underparts, and a uniform brownish-gray back. Its vocalizations are remarkable, consisting of long and powerful songs that echo strikingly across the steep montane slopes, producing a characteristic resonant effect. The species was documented exclusively at higher elevations within a transitional zone between submontane and stunted forests, where the understory is densely structured by root mats. A preliminary population estimate, based on field detections and spatial extrapolation, suggests approximately 2,106 individuals restricted to the Serra do Divisor massif. Although no immediate anthropogenic pressures were observed within its range, the species may be highly vulnerable to climate change and to proposed infrastructure projects that threaten the integrity of this federally protected region. The discovery of T. resonans highlights the biological uniqueness of the Serra do Divisor, reinforces its status as a center of montane endemism, and underscores the critical importance of maintaining its long-term conservation.
December 2, 2025 at 7:20 AM
Reposted by Tim Janicke
sciencex.bsky.social
Long-term experiments show that strong sexual selection in beetles accelerates genetic and reproductive divergence, supporting its role in the early stages of new species formation.
Sexual selection in beetles leads to more rapid evolution of new species, long-term experiments show
When males are forced to compete for females, new species form more rapidly. This has been shown in a new study where the researchers compared beetles allowed to mate freely with groups of the same species where competition for mating was restricted.
phys.org
December 1, 2025 at 7:50 PM
Reposted by Tim Janicke
benoitevol.bsky.social
Time to publish responsibly: DAFNEE, a database of academia-friendly journals in ecology and evolutionary biology url: academic.oup.com/jeb/article/...
Time to publish responsibly: DAFNEE, a database of academia-friendly journals in ecology and evolutionary biology
Abstract. The current economics of scientific publishing reveal a profound imbalance: academia pays prices far exceeding the actual costs of publication. R
academic.oup.com
December 1, 2025 at 9:01 PM
Reposted by Tim Janicke
esajournals.bsky.social
🆕 in "Ecology": Who spreads more disease - males or females? At least in water fleas, it depends on temperature

📄The sicker sex is plastic: Thermal plasticity determines sex biases in pathogen transmission
doi.org/10.1002/ecy....
Some possible forms of sex-specific plasticity in each infection component and how they may lead to non-intuitive predictions for sex-biases in pathogen transmission. Using a horizontally transmitted pathogen as an example, transmission capacity through each sex depends on the sex-specific differences in host susceptibility, pathogen loads, and death rates. Hypothetically, each component could have a unique form of sex-specific plasticity – susceptibility might be plastic only for males (i.e., sex-specific), equally plastic in both sexes in the same direction (i.e., equivalent), and equally plastic in both sexes but in opposing directions (i.e., divergent). Yet considering overall disease spread would suggest a strong male-bias in transmission in environment 1, but no bias at all in environment 2, and that this shift in the extent of the ‘sicker sex’ (in regard to the sex where pathogen transmission is highest) would be underpinned entirely by plasticity in male transmission only.
November 25, 2025 at 8:16 PM
Reposted by Tim Janicke
benitoexplains.bsky.social
Very happy to see our opinion article out in @cp-trendsecolevo.bsky.social today. 🥳 We ask whether sexual signals can influence the evolutionary trajectory of naturally selected adaptations, such as protective colouration, for better or for worse 🧐 1/n
doi.org/10.1016/j.tr...
November 29, 2025 at 2:07 PM
Reposted by Tim Janicke
ece2026tours.bsky.social
📢Don’t miss it! Less than 3 weeks left to submit your abstract and register at the early bird rate!

The 15th of December deadline for the XIII European Congress of Entomology (29 June – 3 July 2026, Tours, France) is fast approaching!

All details & submission: ➡️https://www.ece2026.org/
ECE 2026 - XIII European Congress of Entomology
It is our great pleasure to welcome you to Tours, France, in the heart of the Loire Valley, from June 29 to July 3, 2026.
www.ece2026.org
November 26, 2025 at 8:55 AM
Reposted by Tim Janicke
danielwanoble.bsky.social
We’ve started the Thermal
Ecology Alliance! Go grab a cup of TEA and join the movement www.thermalecologyalliance.org/participation
www.thermalecologyalliance.org
November 26, 2025 at 9:31 AM
Reposted by Tim Janicke
robknell.bsky.social
Funded PhD studentship available on the way that mating system affects coevolutionary processes with natural enemies. #ecoevo #sexualselection looking for a great candidate spread the word! www.findaphd.com/phds/project... 🧪
Mating systems, coevolution and resistance evolution. at University of Hull on FindAPhD.com
PhD Project - Mating systems, coevolution and resistance evolution. at University of Hull, listed on FindAPhD.com
www.findaphd.com
November 23, 2025 at 7:25 PM
Reposted by Tim Janicke
jexpbiol.bsky.social
Most #hummingbirds use their elegant beaks to sip nectar, but male green hermits stab each other in the neck with their sharp, straight weaponised bills when duelling during the mating season

journals.biologists.com/jeb/article/...

Read the full article at journals.biologists.com/jeb/article/...
A green hermit (Phaethornis guy) at the Catarata del Toro, Costa Rica. Photo credit: Mike Baird, CC BY 2.0 (https://creativecommons.org/licenses/by/2.0/), via Wikimedia Commons.
November 19, 2025 at 5:45 PM
timjanicke.bsky.social
Excited to announce our symposium on eco-evolutionary dynamics of #sexualselection & #sexualconflict at the XIII European Congress of Entomology (29 June–3 July 2026, Tours, France), co-organised with Lucas Marie-Orleach!

Call for abstracts is open until 15 Dec 2025.

www.ece2026.org
ECE 2026 - XIII European Congress of Entomology
It is our great pleasure to welcome you to Tours, France, in the heart of the Loire Valley, from June 29 to July 3, 2026.
www.ece2026.org
November 19, 2025 at 2:22 PM
Reposted by Tim Janicke
alielw.bsky.social
Join us! 🧬🪰🎉🔬

We are currently advertising two #PhD projects to study the #evolution, #development and #genomics of sexual traits in stalk-eyed flies.

Deadline for applying is Wednesday, January 7, 2026. Get in touch for more info!
November 17, 2025 at 3:58 PM
Reposted by Tim Janicke
filipruzicka.bsky.social
Modestly, we decided to review a century's worth of theories of balancing selection :) onlinelibrary.wiley.com/doi/10.1111/...
A century of theories of balancing selection
Traits that affect organismal fitness are often highly genetically variable. This genetic variation is vital for populations to adapt to their environments, but it is also surprising given that natur...
onlinelibrary.wiley.com
November 14, 2025 at 2:31 PM