Tim Janicke

Evolutionary biologist at CNRS
studying sexual selection in animals

[Tim Janicke @TimJanicke]

📌 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.

1/4

https://t.co/HP7XJoBYew

[Rob Barber @ra_barber]

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: https://t.co/ZYQuzgyRC1

[Judith Mank @judithmank]

I am loving the @EvolLetters by G. Moggioli. This issue has 3 articles about the Darwin-Bateman paradigm. Lehtonen & Parker https://t.co/QdKJrLFMKC provide theory, w/ comments by @timjanicke https://t.co/QnG9EBHWb1 and Mokos et al. https://t.co/AM52bwPnyq

[Joe Tobias @ja_tobias]

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
https://t.co/mAwOMzPYCv

[Tim Janicke @TimJanicke]

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!

[Bárbara Freitas @brbbfreitas]

📌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 👇
https://t.co/k1bwbNVMgz

[Bárbara Freitas @brbbfreitas]

📌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 👇
https://t.co/k1bwbNVMgz

[PLOS Biology @PLOSBiology]

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 https://t.co/JTgE7ndIDG

[Karl Grieshop @karlgrieshop]

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

https://t.co/2mQwtpRFo3

[maria albo @mariaalbo6]

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
https://t.co/HDxfsl8FcB

[Tim Janicke @TimJanicke]

Fantastic to see this study come to life. Congrats, Lennart!

[Journal of Evolutionary Biology @JEvBio]

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

https://t.co/BlOdRWzacM

[Evolution Letters @EvolLetters]

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.

https://t.co/i4ult9ADaN

[Tim Janicke @TimJanicke]

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.

https://t.co/Dz1iJK1rPU

[Tim Janicke @TimJanicke]

In an attempt to be explicit about the ultimate target of intra-sexual competition, I propose to define sexual selection as competition for access to reproductive resources provided by potential mating partners.

4/4

[Tim Janicke @TimJanicke]

📌 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.

1/4

https://t.co/HP7XJoBYew

[Tim Janicke @TimJanicke]

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.

3/4

[Tim Janicke @TimJanicke]

with Lucas Marie-Orleach, @JTonnabel, @tamram and Michael Ritchie

[Tim Janicke @TimJanicke]

#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!

[Tim Janicke @TimJanicke]

Many thanks for encouragement and inspiring discussions to @kokkonutter, @JTonnabel, Patrice David and Beatriz Alvarez. Also to Sin-Syue Li for providing his beautiful picture of copulating painted snipes

[Tim Janicke @TimJanicke]

Not much interested in definitions? Thought I was neither, but a recently proposed definition of #SexualSelection kept me pondering. Happy to share my thoughts (and another alternative definition) in an invited review in @BehavEcol

https://t.co/pc7IclLgtR