Advertisement · 728 × 90

Posts by Michael Matschiner

Kurator/in (m/w/d) für Ichthyologie gesucht — Naturkundemuseum Stuttgart, ab sofort; naturkundemuseum-bw.de/en/jobs

Kurator/in (m/w/d) für Ichthyologie gesucht — Naturkundemuseum Stuttgart, ab sofort; naturkundemuseum-bw.de/en/jobs

The Natural History Museum Stuttgart is seeking to fill a position as
Curator / Researcher (m/f/d) in Ichthyology

Permanent, full-time (80–100%)
Remuneration in accordance with TV-L E13

Application deadline: 17/05/2026

➡ Further information: https://t1p.de/3svwg

1 week ago 7 13 0 0
A female kakapo on a nest facing the camera, with a young chick in front of her. Credit: Andrew Digby

A female kakapo on a nest facing the camera, with a young chick in front of her. Credit: Andrew Digby

This year's #kakapo breeding season has been the biggest on record:
- 256 eggs (252 in 2019)
- 148 fertile eggs (116 in 2019)
- 105 eggs hatched (86 in 2019).
It'll be 2+ months until we know how many chicks will fledge (73 in 2019). There are currently 95 alive. #conservation #kakapo2026 #birds

1 week ago 1608 463 14 30

So you are using IQ-TREE to estimate a tree for "deep time" phylogenetics using amino acid alignments. There is a lot of confusion about how to test model fit. Here are some suggestions.

1 month ago 68 37 1 2
Bugs in a box-an analogy
We can make a physical analogy (if a somewhat fanciful one) by considering a box containing hyperactive, indiscriminate, voracious, and insatiable bugs. We put k bugs into the box. They run about without paying any attention to where they are going. Occasionally two bugs collide. When they do, one instantly eats the other.
Being insatiable, it then resumes running as quickly as before. It is obvious what will happen. The number of bugs in the box gradually falls from k to k - 1, to k-2, as the bugs coalesce, until finally only one bug is left.
The analogy is actually fairly precise. The number of pairs of bugs that can collide is k(k - 1) /2. If there are 2N "places" in the box that can be occupied, the probability of a collision will be proportional to k(k - 1)/4N. The size of the population corresponds to the size of the box. A box with twice as many "places" will slow the coalescence process down by a factor of two. So a simpleminded physical analysis of the bugs-in-a-box process will have the Kingman coalescent distribution as the probability distribution of its outcomes.

Bugs in a box-an analogy We can make a physical analogy (if a somewhat fanciful one) by considering a box containing hyperactive, indiscriminate, voracious, and insatiable bugs. We put k bugs into the box. They run about without paying any attention to where they are going. Occasionally two bugs collide. When they do, one instantly eats the other. Being insatiable, it then resumes running as quickly as before. It is obvious what will happen. The number of bugs in the box gradually falls from k to k - 1, to k-2, as the bugs coalesce, until finally only one bug is left. The analogy is actually fairly precise. The number of pairs of bugs that can collide is k(k - 1) /2. If there are 2N "places" in the box that can be occupied, the probability of a collision will be proportional to k(k - 1)/4N. The size of the population corresponds to the size of the box. A box with twice as many "places" will slow the coalescence process down by a factor of two. So a simpleminded physical analysis of the bugs-in-a-box process will have the Kingman coalescent distribution as the probability distribution of its outcomes.

Thought I would share this famous analogy from Felsentein’s book I just re-stumbled on. Just in case you’re bug in a box and missed it 😜

1 month ago 15 8 0 0

I’m looking for a post doc (up to five years) interested in phylogenetics and earth systems - please spread the word!

1 month ago 61 82 1 5
Comic. [2x2 chart. Top left quadrant: seem like dinosaurs x are dinosaurs. Silhouettes of dinosaurs stegosaurus, triceratops, tyrannosaurus, velociraptor, and long-neck dinosaur. Top right quadrant: seem like dinosaurs x are not dinosaurs. Silhouettes of mosasaur, quetzalcoatlus, dimetrodon, plesiosaur, and pteranodon. Bottom left quadrant: don’t seem like dinosaurs x are dinosaurs. Silhouettes of penguin, egret, ostrich, pigeon, falcon. Bottom right: don’t seem like dinosaurs x are not dinosaurs. Silhouettes of squirrel, stapler, plant, person, and bicycle.]

Comic. [2x2 chart. Top left quadrant: seem like dinosaurs x are dinosaurs. Silhouettes of dinosaurs stegosaurus, triceratops, tyrannosaurus, velociraptor, and long-neck dinosaur. Top right quadrant: seem like dinosaurs x are not dinosaurs. Silhouettes of mosasaur, quetzalcoatlus, dimetrodon, plesiosaur, and pteranodon. Bottom left quadrant: don’t seem like dinosaurs x are dinosaurs. Silhouettes of penguin, egret, ostrich, pigeon, falcon. Bottom right: don’t seem like dinosaurs x are not dinosaurs. Silhouettes of squirrel, stapler, plant, person, and bicycle.]

Dinosaurs And Non-Dinosaurs

xkcd.com/3204/

2 months ago 8731 1978 104 96
Home | SCAR open science conference

Only ~3 weeks left to submit abstracts to the @scar-antarctic.bsky.social meeting in Oslo! Come present your work on Antarctic and/or sub-Antarctic fish evolution in session#21 convened by @mmatschiner.bsky.social, Julia York, Jin-Hyoung Kim, and myself!
All the fishes are welcome!❤️🐟🧪🌎🇦🇶
scar2026.org

2 months ago 6 2 1 2
Advertisement
Reptile Handler At Birthday Party Ruthlessly Heckled By 6-Year-Old For Showing Amphibian

Reptile Handler At Birthday Party Ruthlessly Heckled By 6-Year-Old For Showing Amphibian

Reptile Handler At Birthday Party Ruthlessly Heckled By 6-Year-Old For Showing Amphibian theonion.com/reptile-handler-at-birth...

2 months ago 1641 209 13 17
Post image

Charley Harper, "Darwin's Finches", from "The Giant Golden Book of Biology", 1961

3 months ago 1016 242 4 9
Post image

wikipedia turns 25 today! the last unenshittified major website! backbone of online info! triumph of humanity! powered by urge of unpaid randos to correct each other! somehow mostly reliable! "good thing wikipedia works in practice, because it sure doesn't work in theory" - old wiki adage

3 months ago 12511 4012 95 304
Preview
DDLS Research School Postdoc call 2026 Call for Academic and Industrial Postdoctoral Fellowships in Data-Driven Life Science 2026 Generic Description of the DDLS Postdoc Program The SciLifeLab and Wallenberg National Program for Data-Drive...

Hit me up if you'd like to apply to a Data-driven postdoc fellowship with me in Sweden. 2 year salary, excellent community. Deadline March 31. I have a project idea on reference bias vs pangenome, but keen on hearing ideas. Please share broadly.

www.scilifelab.se/data-driven/...

3 months ago 14 22 0 0
HLi Lab - Vacancies Openings

I am looking for a postdoc to develop high-performance algorithms in computational genomics. Email or DM me if interested. For more information, see hlilab.github.io/vacancies. RTs appreciated!

3 months ago 44 64 1 0

We’re so used to conflicting phylogenetic results that we tend to shrug shoulders. Nice to see how @caseywdunn.bsky.social digs into one such conflict, finds the issue, and resolves it. Bravo!

3 months ago 4 0 0 0
Post image

Please repost: 🚨Field assistant position 🐧

We offer a 14-months field assistant position through the French Polar Institute to work on king penguin ecophysiology and behavioral ecology.

Requirements: EU citizen < 30yo having experience with harsh fieldwork & wild bird/mammal handling/sampling.

3 months ago 38 66 1 2
Preview
Senior Lecturer/Associate Professor in Biodiversity The Department of Biology was established in 2010 through the merger of the Departments of Ecology, Cell and Organism Biology, Biological Undergraduate Education, and the Biological Museums. The depar

Come and join me and my colleagues at the Department of Biology, #LundUniversity in #sweden! We have am open position as Senior Lecturer/Associate Professor in Biodiversity.

Apply here no later than February 11 2026:

lu.varbi.com/en/what:job/jobID:848749...

4 months ago 77 117 0 1
Advertisement
Preview
Adaptive spread of a sexually selected syndrome eliminates an ancient color polymorphism in wall lizards Genetically determined color morphs are found in many animals. Polymorphism can be maintained by social selection if competitive interactions allow each morph to increase in frequency when rare. This ...

Great new study about the loss of a colour morph in Common Wall Lizards (Podarcis muralis)

www.science.org/doi/10.1126/...

3 months ago 16 4 0 1
Post image

NEW JOB in #ornithology with @vogelwarte.bsky.social to unravel the demographic drivers of population change in Alpine #swifts in #Switzerland: buff.ly/crV1rT8

3 months ago 40 28 0 0
Preview
Size of Life From an amoeba to a blue whale

and the winner of the "2025 best thing on Internet" has just arrived
neal.fun/size-of-life/

@carlbergstrom.com

3 months ago 137 56 1 6
Preview
The long-term evolutionary potential of four yeast species and their hybrids in extreme temperature conditions Abstract. Accelerating climate change and extreme temperatures urge us to better understand the potential of populations to tolerate and adapt to thermal c

Check our last paper, where we explore how interspecific hybridization can facilitate adaptation to novel environments. @stelkens.bsky.social
doi.org/10.1093/evol...

3 months ago 10 5 0 0

What are the good free LIMS these days used by molecular labs? We mainly need to link specimen and sample information.

4 months ago 0 0 1 0
Preview
Hemoglobin-Gene Cluster Deletions in Antarctic White-Blooded Icefishes Facilitated by Transposable Elements Abstract. Vertebrates transport oxygen throughout the body bound to hemoglobin packed in red blood cells. Antarctic icefishes are evolutionary oddities wit

We recently published a follow up in a new article published in @genomebiolevol.bsky.social about the hemoglobin gene cluster deletions in the icefish ancestor. We show that each deletion involve different mechanisms and that transposons fueled these deletions!
🐟🧪🌎🧊🇦🇶
academic.oup.com/gbe/article/...

4 months ago 11 4 0 1

Very excited to share that our latest paper is out in Science! We show that the type specimen of Nanotyrannus—an isolated skull—is fully grown, showing that it is not a juvenile Tyrannosaurus rex but a distinct species (1/12)
www.science.org/doi/10.1126/...

4 months ago 98 41 1 6
Post image

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.

4 months ago 285 88 7 13

Come tell us about your cool new evolutionary work on Antartic (and/or sub-Antarctic) fishes! It doesn't have to be notothenioids, we love all the fishes (and Evolution)!!
🧪🌎🐟🧊🇦🇶
@scar-antarctic.bsky.social
@usscar-antarctic.bsky.social

4 months ago 23 6 0 0
A close-up image of a gar's ganoid scales

A close-up image of a gar's ganoid scales

A unique feature of gars is those distinctive armor-like scales! Unlike a typical fish’s overlapping scales, gars have interlocking “ganoid” scales that are made up of a material similar to the enamel on our teeth. The name “Lepisosteus” even means “bony scale” 🦴 #25DaysofFishmas

4 months ago 40 8 1 1
Advertisement
Preview
Neural posterior estimation for population genetics Simulation-based inference methods are increasingly being used in population genetics due to their flexibility and ability to be applied in settings where likelihood-based methods are intractable. Per...

Popgen folks, Jiseon, Nate, and Andy, along with Yuxin Ning and Franz Baumdicker, just released a really cool new method for simulation based inference (think ABC) using normalizing flows. It seems to work really well! full joint posteriors ftw!
www.biorxiv.org/content/10.6...

4 months ago 23 14 2 1
A Sailfin Plunderfish (Histiodraco velifer)

A Sailfin Plunderfish (Histiodraco velifer)

Hi Team Fish, we (@notothentoma.bsky.social, Julia York, and Jin-Hyoung Kim) are organizing a session on Antarctic Fish Evolution at SCAR 2026 in Oslo: scar2026.org
Submit your abstract by 28 February, and join us in beautiful Oslo 8–19 August!
(Photo: Armin Maywald / Alamy)

4 months ago 12 0 0 2
Four photographs of a ground-dwelling, somewhat partridge-like bird on a forest floor. The bird is mostly brownish in color, with a dark gray "mask" over its eyes and the top of its head.

Four photographs of a ground-dwelling, somewhat partridge-like bird on a forest floor. The bird is mostly brownish in color, with a dark gray "mask" over its eyes and the top of its head.

New species of tinamou, the slaty-masked tinamou (Tinamus resonans): mapress.com/zt/article/v... 🪶🧪 (📷Luis A. Morais)

4 months ago 62 23 3 4
Figure 1 from a paper published in Nature (linked in post). The figure purports to be an infographic depiction of the "Overall working of the framework" for 'explainably' diagnosing autism spectrum disorder. The infographic is plainly nonsense, containing many spelling errors, nonsense words, meaningless images and graphs. Clearly created using generative AI and (crucially) NEVER CHECKED AT ANY STEP OF THE WRITING OR PUBLICATION PROCESS.

Figure 1 from a paper published in Nature (linked in post). The figure purports to be an infographic depiction of the "Overall working of the framework" for 'explainably' diagnosing autism spectrum disorder. The infographic is plainly nonsense, containing many spelling errors, nonsense words, meaningless images and graphs. Clearly created using generative AI and (crucially) NEVER CHECKED AT ANY STEP OF THE WRITING OR PUBLICATION PROCESS.

Hey @nature.com, have you got an explanation for how the hell THIS happened? & especially why you accepted a paper with such a bizarre piece of genAI slop in it?!
& more to the point, why we should take you seriously at all going forward?
www.nature.com/articles/s41...

4 months ago 1285 342 74 179
Credit card fraud
Black neon tetras committed credit card fraud during a 2023 livestream by "Mutekimaru Channel" on YouTube. The owner was using motion-tracking software to turn the fish's movements into Nintendo Switch inputs, letting them "play" video games. 8 In 2020, the fish beat Pokemon Sapphire after 3,195 hours, a feat that takes about 30 hours for a typical human. 9/ 181 On January 14, 2023, Pokémon Violet crashed at 1,144 hours, giving the fish free access to the main menu. They entered inputs that opened Nintendo eShop, added 500 yen ($3.85 USD) to their owner's account, and exposed his credit card details on the livestream. 10) 11) Mutekimaru later requested a refund of the 500 yen from Nintendo. l12)
"Fish eagerly read the terms and conditions. Many of us humans don't read the terms of service, but fish are smarter than we are"
- caption from Mutekimaru in a video about the incident 12)
The fish also downloaded an N64 emulator, set up PayPal, used reward points to buy an avatar, and changed Mutekimaru's Nintendo account name to
"ROWAWAWA*". 13, After about seven hours, their movements shut down the Switch. 14)

Credit card fraud Black neon tetras committed credit card fraud during a 2023 livestream by "Mutekimaru Channel" on YouTube. The owner was using motion-tracking software to turn the fish's movements into Nintendo Switch inputs, letting them "play" video games. 8 In 2020, the fish beat Pokemon Sapphire after 3,195 hours, a feat that takes about 30 hours for a typical human. 9/ 181 On January 14, 2023, Pokémon Violet crashed at 1,144 hours, giving the fish free access to the main menu. They entered inputs that opened Nintendo eShop, added 500 yen ($3.85 USD) to their owner's account, and exposed his credit card details on the livestream. 10) 11) Mutekimaru later requested a refund of the 500 yen from Nintendo. l12) "Fish eagerly read the terms and conditions. Many of us humans don't read the terms of service, but fish are smarter than we are" - caption from Mutekimaru in a video about the incident 12) The fish also downloaded an N64 emulator, set up PayPal, used reward points to buy an avatar, and changed Mutekimaru's Nintendo account name to "ROWAWAWA*". 13, After about seven hours, their movements shut down the Switch. 14)

Fish have committed credit card fraud

5 months ago 4382 1457 61 155