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Fredrik Jutfelt 🐠

@jutfelt.bsky.social
4.5K followers 1.2K following 408 posts

Animal physiology, marine biology, fish, climate change, scientific integrity, science and academia. Professor @goteborgsuni.

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 28/09/2026
I've had several people contact me being surprised, asking if this misconduct case is still ongoing. It is! Unfortunately these things take time, and I still expect a few more retractions (in addition to the 3 retractions + multiple expressions of concerns and corrections already out).
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 28/09/2026
Excellent video of the uphill work of trying to correct fabricated papers!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 19/09/2026
A foundational paper on the effects of ocean acidification on fish behaviour is retracted! "neither the publisher nor the editor has confidence in the article, primarily because the data provided during the investigation were not consistent with the observation methods described in the article."
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Zebrafish Rock! @zebrafishrock.bsky.social · 21/09/2026
In instances like this it’s important to remember #WWJD (What would Jutfelt do?) 😉
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Nick Brown @steamtraen.eu · 19/09/2026
Even without descriptive statistics, you can see from Table 2 that this paper is a case of @ianhussey.mmmdata.io's maxim that "If researchers find Cohen’s d = 8, no they didn’t" (mmmdata.io/posts/2025/0...).
mmmdata.io
If researchers find Cohen's *d* = 8, no they didn't
I’ve spent a lot of time thinking about the plausibility of standardized effect sizes in the last year. From a trustworthiness assessment perspective, (standardized) effect sizes have a great combinat...
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Fabian Wittmers @academic-integrity.bsky.social · 19/09/2026
I remember a seminar on this case you gave at GEOMAR when I was doing my Dr. there. By then (2021/22?) there was already overwhelming evidence out there to retract most of those papers.... Not surprising that journals are slow-rolling this but it's still outrageous that they get away with it.
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 19/09/2026
A foundational paper on the effects of ocean acidification on fish behaviour is retracted! "neither the publisher nor the editor has confidence in the article, primarily because the data provided during the investigation were not consistent with the observation methods described in the article."
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 17/09/2026
I had to check if this was real but unfortunately it seems like it is
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Jacquelyn Gill @jacquelyngill.bsky.social · 17/09/2026
When even MDPI decides your article needs to be retracted…woof.
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 06/09/2026
Great turnout in today’s climate march through Gothenburg!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 06/09/2026
Great turnout in today’s climate march through Gothenburg!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 01/09/2026
Join the Gothenburg climate march on Sunday! If you think climate change should be a high-priority topic in Swedish and international politics, come join us! klimatmarsch.org/september.html
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Jenny TP @jennytpgrows.bsky.social · 24/08/2026
#AcademicSky ##PhDSky
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Zebrafish Rock! @zebrafishrock.bsky.social · 24/08/2026
Wonderful oppor-tuna-ty*, for those interested! 🐠 *May contain actual tuna
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 24/08/2026
Come join us, PhD and postdoc positions! Please spread! Supervisor @patricepottier.bsky.social (patricepottierlab.com), me as co-supervisor. Impacts of climate change on different life-stages in fish.🐟🧪 PhD web103.reachmee.com/ext/I005/103... Postdoc web103.reachmee.com/ext/I005/103...
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Dr. Justin Baumann @jbaumann3.bsky.social · 14/08/2026
What a cool job opportunity. Note the specific interest in evolutionary genomics
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 14/08/2026
Tenure track professor in Rapid Marine Adaptation at the University of Vienna! Deadline: Sept. 15th jobs.univie.ac.at/job/Tenure-T...
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 12/08/2026
Eclipse!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 12/08/2026
Some clouds but still very cool!!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 27/07/2026
Heading back from Vancouver Island after an eventful trip. First the ICBF conference then the FINclub workshop, then finished things off diving with giant pacific octopus. Very inspiring and productive, and so much fun!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 15/07/2026
Enjoying the great talks and beautiful surroundings at the ICBF conference at UBC. Thanks to the organisers!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 09/06/2026
We have a fully funded PhD position on European eel! Please spread! 🐟 🪱 Main supervisor Josefin Sundin @josefin-sundin.bsky.social at SLU Aqua Stockholm (scholar.google.com/citations?us...). Apply through the portal: www.slu.se/en/about-slu...
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 05/07/2026
🇳🇴
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 01/07/2026
Deadline coming up on this position soon. Spread please!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 01/07/2026
Deadline coming up on this position soon. Spread please!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 01/07/2026
Deadline coming up on this position soon. Spread please!
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Zebrafish Rock! @zebrafishrock.bsky.social · 23/06/2026
Wonderful news 🎉 Congrats, Dr. Silva-Garay! #PhDone
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 22/06/2026
Amazing work Dr Lorena Silva-Garay @lorenasilvag.bsky.social defending your thesis! Such impressive work over these past four years, I’m so very proud of you!
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Josefin Sundin @josefin-sundin.bsky.social · 08/06/2026
Fully-funded 4-year PhD-position available! The PhD-student will investigate the effects of restocking European eel. The position will be based at SLU Aqua in Stockholm, Sweden. Application deadline is July 6. Info about the PhD-position and link to apply: www.slu.se/en/about-slu...
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Michael Okun @michael-okun.bsky.social · 10/06/2026
I’ve officially resigned as Associate Editor for Frontiers in Systems Neuroscience. It used to be a reputable journal, but became a case study in how forced automation destroys academic integrity. 👇
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 11/06/2026
Frontiers journals:
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 09/06/2026
We have a fully funded PhD position on European eel! Please spread! 🐟 🪱 Main supervisor Josefin Sundin @josefin-sundin.bsky.social at SLU Aqua Stockholm (scholar.google.com/citations?us...). Apply through the portal: www.slu.se/en/about-slu...
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Reese Richardson @reeserichardson.bsky.social · 05/06/2026
The Thermo Fisher situation keeps getting worse. We've now collected 450+ problematic images presented as verification data in TF's antibody catalog. This includes: 🖌️ Dozens more images with duplications or painting 🖨️ Hundreds of blots that all share the same background (behold slideshow below)
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 04/06/2026
Zebrafish by ChatGPT and Claude (At least Claude’s version is unique and not stolen) 🐟🧪
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Madhav @madhav.bsky.social · 29/05/2026
This is heartbreaking (from the India subreddit)
I want to explain what 48 degrees actually feels like when you live in a developing country, because it is terrifying.
You can't just "stay inside and run the AC."
The power grid simply cannot handle the load of millions of people trying to cool down, so we are dealing with rolling blackouts. Imagine sitting in the pitch dark in a concrete room that has been baking in the sun for 12 hours, with no ceiling fan, while the ambient temperature inside is still hovering near 40°C at midnight. You don't sleep; you just pass out from exhaustion.
The taps are running dry because the heat evaporates local reservoirs and water usage spikes. People who have to work outside-street vendors, construction workers, delivery drivers-are collapsing. Even the water coming out of the cold tap during the day is hot enough to literally brew tea.
It feels like we are living on the absolute razor's edge of what the human body can endure, and it's only May.
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Reese Richardson @reeserichardson.bsky.social · 28/05/2026
TL;DR: We've identified more than 100 cases of apparent manipulation in Thermo Fisher Scientific's antibody verification data. @sholtodavid.bsky.social @johanduchene.bsky.social reeserichardson.blog/2026/05/28/h...
reeserichardson.blog
How much of Thermo Fisher’s antibody data has been manipulated?
We’ve documented more than 100 instances of apparent data manipulation in Thermo’s catalog
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Big Biology | A Science Podcast @bigbiology.bsky.social · 26/05/2026
Our recent guest Dan Simberloff discussed an early experiment he did to test some of the predictions of island biogeography theory. To do so, Dan and his collaborators had to find a way to wipe out all of the arthropod species on some small islands in Florida. 🏝️
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MetJam @metjam.co.uk · 25/05/2026
34.8ºC at Kew Gardens breaks its May AND June records by OVER 4ºC for its May record set in 1922 and by 0.2ºC for its June record set in 1976. Unprecedented heat for the UK in late May, and likely to be bettered tomorrow. A rounded 35ºC temperature should not happen in May.
Spaghetti plot showing Kew and Kew Gardens temperatures since 1881 with May and June records highlighted at 30.3ºC in 1922 and 34.6ºC in 1976 respectively. 2026 is plotted as a thick red line that nearly exceeds 35ºC with a value of 34.8ºC.
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Trish Schulte @trishschulte.bsky.social · 13/05/2026
Moa’s thesis was outstanding and I really enjoyed our discussion during her defence. Along with the thermal physiology the day before it was an intellectually stimulating visit to beautiful Trondheim
A sunny day in Trondheim
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 12/05/2026
@gaia.eco please stop unfollowing and following
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Diana Madeira, PhD @dianasmadeira.bsky.social · 11/05/2026
Super cool discussions on thermal #physiology at NTNU!
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Zebrafish Rock! @zebrafishrock.bsky.social · 10/05/2026
You rock, Dr. Metz 🎉 Congrats! #PhDone
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 10/05/2026
Huge congrats to new Dr Moa Metz! 🥳 I couldn’t be more proud of your achievements!
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Halley E. Froehlich @dochfroehlich.bsky.social · 08/05/2026
My move to Finland has made headlines in the Nordics. My decision was not easy, and the transition is very hard (no shock there). But long term, I’m looking for joy in science again and societal support for my daughter 🇫🇮: www.hbl.fi/finland/amer...
hbl.fi
Amerikansk professor flydde till Finland
Så svårt blev det efter Trump • ”Omöjligt att göra arbetet”.
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 17/04/2026
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 19/04/2026
Congrats to Karolinska Institute, the most prestigious research institute in Sweden!
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 19/04/2026
without stating your age, post your favourite film released the year you turned 18.
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 17/04/2026
lil fren
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 13/04/2026
Swedish Research Council application submitted a full day in advance! Who even am I
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Dom Roche @domroche.bsky.social · 31/03/2026
Such a fun project led by really talented and passionate people! If you want a free, user-friendly tracking option (live and post-hoc) check out TracktorLive! doi.org/10.64898/202... @rasmusern.bsky.social @jutfelt.bsky.social @tnorin.bsky.social @shaunkillen.bsky.social @zegnitriki.bsky.social
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