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Posts by Johannes Larsch

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Many wild populations are fragmenting and declining, leading to inbreeding.
We are studying how animals avoid inbreeding and the consequences of inbreeding an in a >20 year study of >20,000 wild mice with whole genomes.
We are recruiting a postdoc at Columbia and two PhD students in U Zurich.

4 days ago 9 8 0 0

Congratulations Irina!

2 weeks ago 1 0 1 0
CIG Symposium - FBM Unil Page CIG Symposium of site Faculty of Biology and Medicine hosted by the University of Lausanne

@jlarsch.bsky.social and I are organising the 2026 CIG Symposium on June 11-12 in Lausanne on "Information transfer: from genes to behaviour", featuring an eclectic set of brilliant scientists. Details and registration here (abstracts by May 1, registration by June 1):

www.unil.ch/fbm/en/home/...

2 weeks ago 7 7 0 0

It's out! Happy to present ITEC, a semi supervised algorithm with an extremely low error rate that can track cells in files of any size (think Terabytes!). We used it in many organisms, including zebrafish, to study how organs form and linked it to gene expression www.biorxiv.org/content/10.6... +🧪

1 month ago 198 59 20 3

Very grateful to everyone who made this work possible. I feel incredibly lucky to have worked with such an amazing team.

Special thanks to: Jakob El Kholtei, KJ Jenie, @mcolomerr.bsky.social, and of course our wonderful collaborator Bogdan Bintu and my mentor @schierlab.bsky.social

1 month ago 45 8 3 2
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I'm thrilled to announce that I'll be starting my lab as a SNSF starting grant professor at the Center for Integrative Genomics in Lausanne! I'm looking for PhD students who are fascinated about the neuronal basis of behaviour across species @fbm-unil.bsky.social

1 month ago 41 15 11 2

Yay!! Super happy to be your colleague soon.

1 month ago 3 0 1 0
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First whole-brain recording of social sound processing in a vertebrate. Surprises start in the hindbrain; thalamus gates conspecific calls; male and female brains diverge downstream. Work by @joerghenninger.bsky.social, @mh123.bsky.social sky.social and team. www.biorxiv.org/content/10.6...

1 month ago 125 49 7 3
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Plastic landmark anchoring in zebrafish compass neurons Nature - Using two-photon microscopy with a panoramic virtual reality setup, how head direction cells in larval zebrafish integrate visual landmarks and optic flow to track orientation is revealed.

1/6: New publication from the lab: “Plastic landmark anchoring in zebrafish compass neurons” by Ryosuke Tanaka (@ryosuketanaka.bsky.social) and Ruben is available here:
rdcu.be/eX1L4

3 months ago 48 23 1 1

Deadline for this post-doc position in my lab extended to Jan 11th!

4 months ago 8 18 0 0
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Exciting new #Zebrafish research from the #WeinsteinLab, led by Jong Park!
“Specialized gas-exchange endothelium of the zebrafish gill” —

www.biorxiv.org/content/10.6...

Amazing to see red blood cells moving through the gills! Don’t forget to check out the supplemental movies ;-)

4 months ago 2209 326 35 21
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Slow-mo video of zebrafish mating. Credit to
@zebrafish007.bsky.social. #ZebrafishZunday 🧪

5 months ago 37 12 1 0
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A GPCR signaling pathway in insect odor detection Odor detection differs fundamentally in vertebrates, which use G protein-coupled receptors (GPCRs), and insects, which employ ion channels. Here, we report the first evidence for a GPCR defining tunin...

Having personally sworn for years that insects don’t use GPCRs for odour detection, Suguru Takagi (@sugurutakagi.bsky.social) discovers that, in fact, they sometimes do …

www.biorxiv.org/content/10.1...

6 months ago 55 29 4 1

“Blame your parents if you can’t pay enough attention." At least when you are a zebrafish! Our new study on attentional switching together with Kumaresh Krishnan, @paulapflitsch.bsky.social , @zwitscherarmin.bsky.social and Florian Engert is out in Science Advances:
doi.org/10.1126/scia...

6 months ago 22 7 0 1
ScienceDirect.com | Science, health and medical journals, full text articles and books.

The final version of our paper on how ants and possibly other insects use a crazy mechanism involving extensive transcriptional interference to regulate odorant receptor expression is now open access in my favorite journal, @currentbiology.bsky.social

authors.elsevier.com/sd/article/S...

7 months ago 52 17 2 0
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PhD Fellowships in Life Sciences: a competition open to future doctoral students. Apply now for FBM PhD Fellowships in Life Sciences – join one of the Faculty’s leading laboratories.

Apply now for FBM #PhD #Fellowships in #Life #Sciences – join one of the Faculty’s leading laboratories.

🚨 Application deadline for fellowships: October 6, 2025.
➡️ www.unil.ch/news/en/1756...

@unil.bsky.social @dmf-unil.bsky.social @dee-unil.bsky.social @dib-unil.bsky.social #fbm #unil

7 months ago 4 6 0 0
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Hierarchical processing of sensory information across topographically organized thalamocortical-like circuits in the zebrafish brain Thalamocortical projections contribute to the spatial organization and functional hierarchies of the mammalian cortex. Primary sensory cortices receive topographically segregated information from firs...

Check out this exciting study led by Anh-Tuan Trinh from our lab, where we investigated how thalamocortical-like circuits in the zebrafish pallium receive, represent, and integrate sensory information:
🔗 doi.org/10.1101/2025...

7 months ago 50 13 4 1

BonnBrain 2026 is a go!
March 23–25, Bonn (DZNE, Bonn, Germany).
Apply now: www.bonnbrain.de
Limited slots. Presentations (posters/talks) selected from submitted abstracts.

Keynotes & invited speakers 👇

7 months ago 28 16 1 0
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Now published @natecoevo.nature.com with @annika-nichols.bsky.social, our latest on the evolution of 𝘴𝘭𝘦𝘦𝘱 across 𝟲𝟬 𝘀𝗽𝗲𝗰𝗶𝗲𝘀 of cichlid fishes! doi.org/10.1038/s415...
with members of the @schierlab.bsky.social and Salzburger labs, as well as the burgeoning Shafer lab @uoftcellsysbiol.bsky.social

7 months ago 78 40 1 2

Jim was an incredibly gifted teacher. Still remember his fundamentals in Neuroscience. Also, great, dry sense of humor.

7 months ago 2 0 0 0
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Supraspinal commands have a modular organization that is behavioral context specific Lau et al. use calcium imaging and statistical modeling to comprehensively survey reticulospinal activity during diverse locomotor behaviors. They find that a small set of functional modules act combi...

Latest from the lab. Beautiful work from Joanna Lau and a fantastic collaboration with James Fitzgerald.

www.cell.com/current-biol...

7 months ago 28 7 0 1
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Can't wait to read this preprint from Misha Ahrens and team. Calcium imaging in larval zebrafish, in every cell in the body! Amazing.

www.biorxiv.org/content/10.1...

7 months ago 80 22 1 3
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Transcriptional Interference Gates Monogenic Odorant Receptor Expression in Ants Communication is crucial to social life, and in ants, it is mediated primarily through olfaction. Ants have more odorant receptor (OR) genes than any other group of insects, generated through tandem d...

If you’re interested in ants, olfaction, gene regulation, or all of the above, here’s a new preprint from the lab for you. It describes an unorthodox mechanism of transcriptional interference by which ant olfactory sensory neurons produce a single functional receptor.
www.biorxiv.org/content/10.1...

7 months ago 59 23 1 0
ALT text: A UMAP representation of a single cell RNAseq dataset from the Drosophila ventral nerve cord as well as images of the Drosophila nerve cord connectome and different stages of fly development.

ALT text: A UMAP representation of a single cell RNAseq dataset from the Drosophila ventral nerve cord as well as images of the Drosophila nerve cord connectome and different stages of fly development.

Neuronal diversity is written in transcriptional codes 🧬. But what is the logic of these codes that define cell types and wiring patterns?
To find out we built a #scRNAseq developmental atlas of the Drosophila nerve cord and linked it to the #connectome 🪰🧠
#preprint thread ⬇️1/8

7 months ago 121 59 6 2
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RFK Jr. in interview with Scripps News: ‘Trusting the experts is not science’ HHS Secretary RFK Jr. sat down with Scripps News for a wide-ranging interview, discussing mRNA vaccine funding policy changes and a recent shooting at the Centers for Disease Control and Prevention.

1. "'Trusting the experts is not a feature of either a science or democracy," Kennedy said."

It's literally a vital feature of both science and of representative democracy.

I've written a fair bit about trust in expertise as a vital mechanism in the collective epistemology of science.

8 months ago 9963 2842 534 473
A stylised hand holds a smartphone from which colourful digital pages flow outward, surrounded by icons of books, screens, and learning materials on a dark blue and purple background.

A stylised hand holds a smartphone from which colourful digital pages flow outward, surrounded by icons of books, screens, and learning materials on a dark blue and purple background.

💡 Whether you’re a new student, a lab leader or a decision-maker at an institutional level, you can now find free tools and guidance all in one place on our new Learning Resources page.

With everything in the thread below and more, get learning today!
buff.ly/sIpX5gU

8 months ago 4 1 0 0
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Binocular integration of prey stimuli in the zebrafish visual system Most animals with two eyes combine the inputs to achieve binocular vision, which can serve numerous functions and is particularly useful in hunting pr…

Latest from my lab: we identify and characterize the function of binocular neurons zebrafish larvae use to hunt prey; sciencedirect.com/science/arti.... Congrats to Richard Tian, Gewei Yan and Tommy Lam @tkclam.bsky.social!

9 months ago 10 3 0 0
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How does the brain work in natural scenarios, in multi-animal societies of wild animals? 🧠 🧪 🦇

doi.org/10.1126/scie...

(1/n)

1 year ago 69 31 7 6
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🚨Very happy that my PhD work is now out in @nature.com!

We discovered that evolution, by acting in the midbrain, shifted the threshold to escape in Peromyscus mice, to fine-tune defensive strategies in different environments

www.nature.com/articles/s41...

This was a truly collaborative effort! 🧵⬇️

8 months ago 473 103 26 5