Tim Janicke
@timjanicke.bsky.social
Evolutionary biology | Behavioural ecology | Sexual selection
@CNRS, CEFE, Montpellier
@CNRS, CEFE, Montpellier
Pinned
Tim Janicke
@timjanicke.bsky.social
· Dec 4
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.
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!
Reposted by Tim Janicke
🚨Postdoc opportunity🚨: The impact of global change on parental care systems
Interested in Shorebirds? Global change? Parental care? Fieldwork? 🐣☀️ Come join us in Budapest!
Interested candidates - get in touch! Deadline Feb 28 2026
Interested in Shorebirds? Global change? Parental care? Fieldwork? 🐣☀️ Come join us in Budapest!
Interested candidates - get in touch! Deadline Feb 28 2026
January 27, 2026 at 8:59 AM
🚨Postdoc opportunity🚨: The impact of global change on parental care systems
Interested in Shorebirds? Global change? Parental care? Fieldwork? 🐣☀️ Come join us in Budapest!
Interested candidates - get in touch! Deadline Feb 28 2026
Interested in Shorebirds? Global change? Parental care? Fieldwork? 🐣☀️ Come join us in Budapest!
Interested candidates - get in touch! Deadline Feb 28 2026
Reposted by Tim Janicke
🛠️ December’s most-read Tools and Resources paper presents a new open-source, low-cost system that accurately tracks aggression and courtship in fruit flies: buff.ly/9dRgwve
Learn more about publishing your tools or resources with us: buff.ly/9u8ZA6k
Learn more about publishing your tools or resources with us: buff.ly/9u8ZA6k
January 26, 2026 at 11:44 AM
🛠️ December’s most-read Tools and Resources paper presents a new open-source, low-cost system that accurately tracks aggression and courtship in fruit flies: buff.ly/9dRgwve
Learn more about publishing your tools or resources with us: buff.ly/9u8ZA6k
Learn more about publishing your tools or resources with us: buff.ly/9u8ZA6k
Join our symposium on
Eco-evolutionary dynamics of #SexualSelection and #SexualConflict at #ECE2026Tours!
⏰ Last week to submit an abstract!
Eco-evolutionary dynamics of #SexualSelection and #SexualConflict at #ECE2026Tours!
⏰ Last week to submit an abstract!
🧪Join the buzz at #ECE2026Tours 🦟🐝
⏰Last week to submit your abstract!
➡️ www.ece2026.org
With 50 symposia in #entomology there is one to host your reseach on your favorite #insects 🪰🐛🦋🐞🪳
😃Already 1000 participants
🙏
@irbi-tours.bsky.social
@ece2026tours.bsky.social
@royentsoc.bsky.social
⏰Last week to submit your abstract!
➡️ www.ece2026.org
With 50 symposia in #entomology there is one to host your reseach on your favorite #insects 🪰🐛🦋🐞🪳
😃Already 1000 participants
🙏
@irbi-tours.bsky.social
@ece2026tours.bsky.social
@royentsoc.bsky.social
January 26, 2026 at 6:09 PM
Join our symposium on
Eco-evolutionary dynamics of #SexualSelection and #SexualConflict at #ECE2026Tours!
⏰ Last week to submit an abstract!
Eco-evolutionary dynamics of #SexualSelection and #SexualConflict at #ECE2026Tours!
⏰ Last week to submit an abstract!
Reposted by Tim Janicke
Size matters. Among the great apes, human penises are unusually large. Why? Check out our new open access paper in @plosbiology.org led by @upama.bsky.social. Link here: journals.plos.org/plosbiology/...
And read the lay article in @theconversation.com here: journals.plos.org/plosbiology/...
And read the lay article in @theconversation.com here: journals.plos.org/plosbiology/...
January 22, 2026 at 11:10 PM
Size matters. Among the great apes, human penises are unusually large. Why? Check out our new open access paper in @plosbiology.org led by @upama.bsky.social. Link here: journals.plos.org/plosbiology/...
And read the lay article in @theconversation.com here: journals.plos.org/plosbiology/...
And read the lay article in @theconversation.com here: journals.plos.org/plosbiology/...
Reposted by Tim Janicke
Why is the human penis longer and thicker than those of other great apes, such as chimpanzees and gorillas? Read our @aunz.theconversation.com piece to find out!
Full paper from @plosbiology.org below! 👇 1/3
Full paper from @plosbiology.org below! 👇 1/3
Compared to other great apes, human penises are mysteriously large, hinting they act as a signal to mates and rivals alike.
👉 Read the full article: theconversation.com/why-are...
👉 Read the full article: theconversation.com/why-are...
January 22, 2026 at 9:21 PM
Why is the human penis longer and thicker than those of other great apes, such as chimpanzees and gorillas? Read our @aunz.theconversation.com piece to find out!
Full paper from @plosbiology.org below! 👇 1/3
Full paper from @plosbiology.org below! 👇 1/3
Reposted by Tim Janicke
#LoveMethods26 is on its way! You can still check it out: excelscior.uc.pt/love-methods...
January 20, 2026 at 6:27 AM
#LoveMethods26 is on its way! You can still check it out: excelscior.uc.pt/love-methods...
Reposted by Tim Janicke
🚨 PhD offer (please share)
Fascinated by bird migration and movement ecology? 🦜🌍 Join us at @vogelwarte.bsky.social to study annual cycle energetics with multi-sensor loggers in multiple species
Deadline: 20 Feb 2026
Starting: June 2026
Supervision: Martins Briedis & me
Info: tinyurl.com/2dbv9nzh
Fascinated by bird migration and movement ecology? 🦜🌍 Join us at @vogelwarte.bsky.social to study annual cycle energetics with multi-sensor loggers in multiple species
Deadline: 20 Feb 2026
Starting: June 2026
Supervision: Martins Briedis & me
Info: tinyurl.com/2dbv9nzh
January 15, 2026 at 1:31 PM
🚨 PhD offer (please share)
Fascinated by bird migration and movement ecology? 🦜🌍 Join us at @vogelwarte.bsky.social to study annual cycle energetics with multi-sensor loggers in multiple species
Deadline: 20 Feb 2026
Starting: June 2026
Supervision: Martins Briedis & me
Info: tinyurl.com/2dbv9nzh
Fascinated by bird migration and movement ecology? 🦜🌍 Join us at @vogelwarte.bsky.social to study annual cycle energetics with multi-sensor loggers in multiple species
Deadline: 20 Feb 2026
Starting: June 2026
Supervision: Martins Briedis & me
Info: tinyurl.com/2dbv9nzh
Reposted by Tim Janicke
Just a week left to apply for a position in our Editorial Board!
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 📣
🧬🌿🪰🐀🦀🔬🧫🦠🐟🐦🧑💻🪸🦎
Learn more and find out how to apply: jevbio.net/call-for-edi...
DEADLINE 19th January 2026 📣
January 12, 2026 at 10:09 PM
Just a week left to apply for a position in our Editorial Board!
Reposted by Tim Janicke
Same-sex sexual behaviour in non-human primates is associated with ecological factors, life history and social structure, according to research published in @natecoevo.nature.com: spklr.io/633248d15a
#Ecology #EcoSky 🌍
#Ecology #EcoSky 🌍
Ecological and social pressures drive same-sex sexual behaviour in non-human primates - Nature Ecology & Evolution
Phylogenetic regression and structural equation modelling of environmental, social and life history traits across the primate clade indicates correlates for same-sex sexual behaviour (SSB), and suggests that while environmental and life history traits tend to influence SSB indirectly, social complexity directly promotes its occurrence.
spklr.io
January 12, 2026 at 7:12 PM
Same-sex sexual behaviour in non-human primates is associated with ecological factors, life history and social structure, according to research published in @natecoevo.nature.com: spklr.io/633248d15a
#Ecology #EcoSky 🌍
#Ecology #EcoSky 🌍
Reposted by Tim Janicke
Join us in Brittany? One week left to apply for this postdoc position deciphering the mysteries of inbreeding depression...
POSTDOC recruitment! We’re looking for a post-doc to join us to work on the (epi)genetic basis of inbreeding depression as part of the ANR-funded project FRIDA
macrostomum.wordpress.com/the-genetic-...
Please share!
macrostomum.wordpress.com/the-genetic-...
Please share!
January 8, 2026 at 6:41 AM
Join us in Brittany? One week left to apply for this postdoc position deciphering the mysteries of inbreeding depression...
Reposted by Tim Janicke
Is lifespan shaped by genetic conflict between the sexes? In wild marmots, longevity is heritable but negatively genetically correlated between males and females, implying selection for longer life in one sex favors shorter life in the other. Image Credit: Wikimedia
academic.oup.com/evlett/advan...
academic.oup.com/evlett/advan...
January 6, 2026 at 2:04 PM
Is lifespan shaped by genetic conflict between the sexes? In wild marmots, longevity is heritable but negatively genetically correlated between males and females, implying selection for longer life in one sex favors shorter life in the other. Image Credit: Wikimedia
academic.oup.com/evlett/advan...
academic.oup.com/evlett/advan...
Reposted by Tim Janicke
Lizards have evolved their own version of rock-paper-scissors. Here's my story on the genetics behind nature's games. Gift link: nyti.ms/493KGMI
January 6, 2026 at 4:21 PM
Lizards have evolved their own version of rock-paper-scissors. Here's my story on the genetics behind nature's games. Gift link: nyti.ms/493KGMI
Reposted by Tim Janicke
As an early Christmas gift, @journal-evo.bsky.social accepted @kenstoyama.bsky.social and my paper on macroevolutionary patterns of ornament evolution in birds of paradise! 🦚
Check it out here:
academic.oup.com/evolut/advan...
Check it out here:
academic.oup.com/evolut/advan...
Allometry, sexual dimorphism, and sexual trait elaboration in the birds of paradise
Abstract. Sexually selected traits include not only some of the most elaborate phenotypes in nature, but also some of the most diverse and sexually dimorph
academic.oup.com
December 23, 2025 at 6:44 PM
As an early Christmas gift, @journal-evo.bsky.social accepted @kenstoyama.bsky.social and my paper on macroevolutionary patterns of ornament evolution in birds of paradise! 🦚
Check it out here:
academic.oup.com/evolut/advan...
Check it out here:
academic.oup.com/evolut/advan...
Reposted by Tim Janicke
Surprisingly, sperm length is not linked to sperm storage traits. Instead, vagina length emerges as a key—yet overlooked—player in post-copulatory sexual selection in birds. academic.oup.com/evlett/article/9/6/686/8271462
Relative testis size is associated with vagina length but not sperm storage traits in Galliformes
Abstract. Post-copulatory sexual selection, comprised of sperm competition and cryptic female choice, is a powerful evolutionary force that can drive the r
academic.oup.com
December 17, 2025 at 2:08 PM
Surprisingly, sperm length is not linked to sperm storage traits. Instead, vagina length emerges as a key—yet overlooked—player in post-copulatory sexual selection in birds. academic.oup.com/evlett/article/9/6/686/8271462
Reposted by Tim Janicke
if you enjoyed our chat today do check out my published paper at www.sciencedirect.com/science/arti... :)
Reduced male pheromone production and an increased female sex ratio promote same-sex sexual behaviour in male Indian meal moths
Same-sex sexual behaviours (SSSBs) are often deemed detrimental to fitness because they carry the same costs as sexual interactions with the opposite …
www.sciencedirect.com
December 16, 2025 at 11:21 PM
if you enjoyed our chat today do check out my published paper at www.sciencedirect.com/science/arti... :)
Reposted by Tim Janicke
🎄✨ Early Christmas gift!
The abstract submission deadline for #ECE2026Tours has been extended to 31 January 2026 🎁🐜
For more information about the XIII European Congress of Entomology ➡️ www.ece2026.org
@irbi-tours.bsky.social @cnrsbiologie.bsky.social @royentsoc.bsky.social
The abstract submission deadline for #ECE2026Tours has been extended to 31 January 2026 🎁🐜
For more information about the XIII European Congress of Entomology ➡️ www.ece2026.org
@irbi-tours.bsky.social @cnrsbiologie.bsky.social @royentsoc.bsky.social
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 15, 2025 at 3:17 PM
🎄✨ Early Christmas gift!
The abstract submission deadline for #ECE2026Tours has been extended to 31 January 2026 🎁🐜
For more information about the XIII European Congress of Entomology ➡️ www.ece2026.org
@irbi-tours.bsky.social @cnrsbiologie.bsky.social @royentsoc.bsky.social
The abstract submission deadline for #ECE2026Tours has been extended to 31 January 2026 🎁🐜
For more information about the XIII European Congress of Entomology ➡️ www.ece2026.org
@irbi-tours.bsky.social @cnrsbiologie.bsky.social @royentsoc.bsky.social
In an earlier review, I proposed to define #sexualselection as competition for gametic and non-gametic resources provided by mating partners.
doi.org/10.1093/behe...
I’m happy to now share a few additional thoughts on it in @behavecol.bsky.social
doi.org/10.1093/behe...
doi.org/10.1093/behe...
I’m happy to now share a few additional thoughts on it in @behavecol.bsky.social
doi.org/10.1093/behe...
Sexual selection: competition for resources provided by mating partners
Sexual selection theory is a cornerstone of behavioral ecology and evolutionary biology, but 150 years after Darwin’s original conception, researchers are
doi.org
December 15, 2025 at 7:59 AM
In an earlier review, I proposed to define #sexualselection as competition for gametic and non-gametic resources provided by mating partners.
doi.org/10.1093/behe...
I’m happy to now share a few additional thoughts on it in @behavecol.bsky.social
doi.org/10.1093/behe...
doi.org/10.1093/behe...
I’m happy to now share a few additional thoughts on it in @behavecol.bsky.social
doi.org/10.1093/behe...
Reposted by Tim Janicke
Killer whales and humans share a trait that is otherwise rare in nature: a long female menopause. Read 'Sexually antagonistic selection, X-chromosome relatedness and the #evolution of menopause in killer whales': doi.org/10.1098/rsbl... #BiologyLetters #ecology Image: Christopher Michel
December 13, 2025 at 11:00 AM
Killer whales and humans share a trait that is otherwise rare in nature: a long female menopause. Read 'Sexually antagonistic selection, X-chromosome relatedness and the #evolution of menopause in killer whales': doi.org/10.1098/rsbl... #BiologyLetters #ecology Image: Christopher Michel
Reposted by Tim Janicke
POSTDOC recruitment! We’re looking for a post-doc to join us to work on the (epi)genetic basis of inbreeding depression as part of the ANR-funded project FRIDA
macrostomum.wordpress.com/the-genetic-...
Please share!
macrostomum.wordpress.com/the-genetic-...
Please share!
December 12, 2025 at 2:31 PM
POSTDOC recruitment! We’re looking for a post-doc to join us to work on the (epi)genetic basis of inbreeding depression as part of the ANR-funded project FRIDA
macrostomum.wordpress.com/the-genetic-...
Please share!
macrostomum.wordpress.com/the-genetic-...
Please share!
Reposted by Tim Janicke
Now out! How important is social experience in male mating behavior? @corrallopeza.bsky.social found that experienced males were more likely to coerce non-receptive females, but did not change overall preference onlinelibrary.wiley.com/doi/10.1002/... w/ @vdbijl.bsky.social @idarolti.bsky.social
December 11, 2025 at 3:47 PM
Now out! How important is social experience in male mating behavior? @corrallopeza.bsky.social found that experienced males were more likely to coerce non-receptive females, but did not change overall preference onlinelibrary.wiley.com/doi/10.1002/... w/ @vdbijl.bsky.social @idarolti.bsky.social
Reposted by Tim Janicke
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...
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
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...
royalsocietypublishing.org/rspb/article...
Reposted by Tim Janicke
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...
I will record lectures & all will be found at this link: github.com/rmcelreath/s...
December 9, 2025 at 1:58 PM
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...
I will record lectures & all will be found at this link: github.com/rmcelreath/s...
Reposted by Tim Janicke
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!
Took me a year (😱), but I finally published a blog post about our article on the #quantgen variance partition of phenitypic plasticity with @lmchev.bsky.social, published in @peercomjournal.bsky.social.
🇬🇧 devillemereuil.legtux.org/quantitative...
🇫🇷 devillemereuil.legtux.org/fr/genetique...
🇬🇧 devillemereuil.legtux.org/quantitative...
🇫🇷 devillemereuil.legtux.org/fr/genetique...
Quantitative genetics of reaction norms: an onion partitionning – Pierre de Villemereuil
devillemereuil.legtux.org
December 10, 2025 at 11:18 AM
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!
Reposted by Tim Janicke
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...
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
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...
doi.org/10.1098/rsbl...
Reposted by Tim Janicke
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...
December 10, 2025 at 2:27 PM
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...