Evolutionary biologist at CNRS studying sexual selection in animals
Montpellier, France
Joined January 2018
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📌 Final version of my review paper on the definition of #SexualSelection is out in @BehavEcol.
I discuss potential limitations of a recently advocated definition and propose an alternative one.
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academic.oup.com/beheco/arti…
Tim Janicke retweeted
A short, succinct, and clear explanation for why biological sex is binary based on two and only two types of gametes. Full disclosure: I was a reviewer (see acknowledgments).
Free access:
onlinelibrary.wiley.com/doi/…
Tim Janicke retweeted
2/ In 2021, after the publication of my book T: the Story of Testosterone, I said on Fox and Friends that there are two sexes, male and female, defined by whether we produce sperm or eggs. Shortly thereafter things became extremely difficult for me at Harvard (particularly in the ev bio department I'd taught in for ages), and I ended up leaving. Below is a link to my discussion with @convoswColeman about the science, about why I felt I had no choice but to leave my job.
youtu.be/GbmsPY8NEEo?si=C_Gi…
Tim Janicke retweeted
1/ A new article in @Ecology_Letters by a group of evolutionary biologists—pioneers and leading experts on the evolution of sex. (The article is open access, short, and clear.)
"Biological sex is best defined as a binary classification of male and female reproductive strategies rooted in anisogamy, characterised by the production of two discrete gamete types of different sizes."
"We call for a more differentiated discourse on sex, one that separates the scientific conception of biological sex from societal discussions regarding the diversity of gender expressions and identities in humans."
onlinelibrary.wiley.com/doi/…
Tim Janicke retweeted
Big news! 🎉 My first PhD chapter has been published in @PLOSBiology, and it just made the cover! 🐦🌍Perfect time to dive into the key findings from our global study on sexual selection in birds. 🧵👇
📖 Read the paper: doi.org/10.1371/journal.pbio…
Tim Janicke retweeted
I am loving the @EvolLetters by G. Moggioli. This issue has 3 articles about the Darwin-Bateman paradigm. Lehtonen & Parker doi.org/10.1093/evlett/qrae0… provide theory, w/ comments by @timjanicke doi.org/10.1093/evlett/qrae0… and Mokos et al. doi.org/10.1093/evlett/qrae0…
Tim Janicke retweeted
Final version of this thing now published in @PLOSBiology, so ... some weekend reading. 🧵
Sexual selection (SS) is a major strand of evolutionary theory, but how and why it varies across species at global scales is poorly known. 1/9
journals.plos.org/plosbiolog…
Does vegetation structure shape animal vocalisations? A meta-analysis testing for phenotypic and evolutionary responses suggests that the acoustic adaptation hypothesis is not universally valid across birds, amphibians, and mammals.
Kudos to @brbbfreitas for the terrific work!
📌Just published: "Meta-analysis of the acoustic adaptation hypothesis reveals no support for the effect of vegetation structure on acoustic signalling across terrestrial vertebrates"
More details 👇
onlinelibrary.wiley.com/doi/…
Tim Janicke retweeted
📌Just published: "Meta-analysis of the acoustic adaptation hypothesis reveals no support for the effect of vegetation structure on acoustic signalling across terrestrial vertebrates"
More details 👇
onlinelibrary.wiley.com/doi/…
Tim Janicke retweeted
How and why does #SexualSelection vary geographically? @ra_barber @ja_tobias &co study 10,671 #bird species, revealing that avian sexual selection varies latitudinally, is explained by temperature seasonality & other #climate-related factors #PLOSBiology plos.io/4fixxjC
Tim Janicke retweeted
Please RT!
🚨4-year PhD position in my lab (Oct 2025 start)🚨
The genomic architecture of adaptation in Drosophila melanogaster
Application deadline: Jan 8, 2025
aries-dtp.ac.uk/studentships…
Tim Janicke retweeted
Super happy with our new collaborative paper in the Neotropics! We examined how climatic variability affects sexual selection for nuptial gifts. Congrats Camila for this awesome research 🙌🏻 and the fantastic work of all authors
Find out more at @ASNAmNat
journals.uchicago.edu/doi/ep…
Fantastic to see this study come to life. Congrats, Lennart!
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Tim Janicke retweeted
Experimental study suggests that sperm competition in hermpahroditic flatworms favours individuals that produce sperm of intermediate size:
@Santhosh_s96 @TimJanicke & Prof. Dieter Ebert @UniBasel_en
ow.ly/g6Jk50T8vOb
Tim Janicke retweeted
Does the inherent sex difference in gamete size drive sex roles? In a recent @EvolLetters opinion piece, @TimJanicke reflects on recent theoretical and empirical advances in understanding how anisogamy shapes sexual differentiation.
doi.org/10.1093/evlett/qrae0…
Delighted to share my thoughts on the latest theoretical and empirical work exploring the evolutionary foundations of sex differences in #SexualSelection. Out now in @EvolLetters.
academic.oup.com/evlett/adva…
I argue that the nature of pre-copulatory competition does not depend on whether individuals compete for gametes or any other resources accessed through mates.
Instead, both sexes compete for a package of resources including gametic and non-gametic resources.
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#SexualSelection and #speciation – unpublished data? For a #metaanalysis of comparative studies testing for a relationship between sexual selection and speciation, we are looking for unpublished data or studies with a different focus that might go undetected. Please get in touch!