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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 5d

Thank you!

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 5d

Awesome, thanks

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 5d

nice. With the old idtracker or the new idtracker ai?

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 5d

Thanks! I haven’t tried this one but it looks good.

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 5d

Ideally yes on the individuals, but no on pose or parts.

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 5d

What's the best free software for behavioural tracking?
(videos of several fish in a shared arena)

Toxtrac?
Tractor?
Trex?
idTracker ai?
Detect+Track?
AnimalTracker?
Other?

Please help 🙏

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 12d

www.nature.com/articles/s44...

Near complete local extinction of iconic anemonefish and their anemone hosts following a heat stress event - npj Biodiversity

npj Biodiversity - Near complete local extinction of iconic anemonefish and their anemone hosts following a heat stress event

www.nature.com

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 12d

I spend most of my time on research and I try to keep the teaching load down. But WOW, it is so inspiring when you meet students like this! Teaching ethics and robust open science practices to the new MSc cohort has been treat.

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 15d

Yes!

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 15d

Yes, many of them are the same fish!

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 15d

Actually, @elisabethbik.bsky.social already posted this on pubpeer and there is an expression of concern for the paper:
pubpeer.com/publications...

PubPeer - Natural history of zebrafish (Danio rerio) in India

There are comments on PubPeer for publication: Natural history of zebrafish (Danio rerio) in India (2013)

pubpeer.com

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 15d

I think it's the same individual, just two consecutive photos?

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 15d

Yes. And that's not all...

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 15d

Notice anything fishy here?
#ImageForensics
🐟🧪
(Too easy for you @elisabethbik.bsky.social)

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 22d

And here is young me moving in to that empty office 10 years ago. And starting the NTNU lab with Rachael and four aquaria.

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 22d

Cleaned out my office at NTNU, exactly 10 years after moving in. Looking at the list of people who passed through the lab, so many great scientists and friends!

www.gu.se/en/research/...

Yes, I feel a little sentimental.

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Reposted by Fredrik Jutfelt 🐠

Ligus @greyauk.bsky.social · Sep 4

😂 so rude, poor mola
but a great video

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · Sep 2

Hilarious and mostly accurate character assassination of the sunfish Mola mola 😂🐟🦑

youtu.be/gtDKKJq9u30?...

The Dumbest Animal Alive

YouTube video by Kurzgesagt – In a Nutshell

youtu.be

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · Aug 25

Check out our new review on how to measure thermal tolerance! 🐟🌡️🧪

Methods in Ecology and Evolution @methodsinecoevol.bsky.social · Aug 25

📖Published📖

Raby et al. provide a comprehensive, practical guide for designing and conducting experiments to measure critical thermal limits, with an emphasis on CTmax 🌍 🧪 👇

buff.ly/iZN6Xdg

Diagram of a template design for a CTmax apparatus. Aeration, mixing mechanisms (pump), and heating elements are in an ‘equipment section’ that is physically separated with a screen from the part of the arena containing the animals (‘animal arena’; here with fish). A submerged temperature sensor (or data logger) is used to log temperatures, in addition to a temperature sensor with a display that is used to score CTmax in real time. The time and temperature should only be visible to the data recorder (and/or video camera), not to the person observing animals for end points.

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · Aug 25

I guess “observations per unit effort” is hard to calculate with the recent advance of ubiquitous video cameras

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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · Aug 25

It would be great if we could analyse the occurrence of southern species statistically, and correlate with sea temperatures. Has this been done for Northern Europe?

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Reposted by Fredrik Jutfelt 🐠

Fredrik Jutfelt 🐠 @jutfelt.bsky.social · Aug 17

New fish species keep popping up in Sweden, most likely because of ocean warming!

Today a large Mahi Mahi in Lysekil!
(Photo Janice Melander)

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Reposted by Fredrik Jutfelt 🐠

Graham Raby @graham-raby.bsky.social · Aug 21

Incredibly nerdy paper, but should be useful I think.

This was a product of a pre-SEB writing retreat a bunch of had in Czechia last year.

Jeremy De Bonville @jaydebon.bsky.social · Aug 20

Happy to see this out in @methodsinecoevol.bsky.social

Are you new to CTmax tests (or CTmin)? Are you experienced, but unsure on what to report in your Methods?🤔

Then this practical guide is for you! It even includes a fillable table! 😎

besjournals.onlinelibrary.wiley.com/doi/full/10....

Measuring critical thermal maximum in aquatic ectotherms: A practical guide

Critical thermal limits, commonly quantified as CTmax (maximum) or CTmin (minimum), are core metrics in the thermal biology of aquatic ectotherms. CTmax, in particular, has recently surged in popu...

besjournals.onlinelibrary.wiley.com

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Reposted by Fredrik Jutfelt 🐠

Shubham Rathore Ph.D. MSc. @shubhamtr.bsky.social · Aug 18

If you have atleast 5 years of postdoctoral experience definitely consider applying!

Fredrik Jutfelt 🐠 @jutfelt.bsky.social · Aug 18

Associate Professor position in animal physiology at the Norwegian University of Science and Technology
(to replace me basically). An amazing permanent position at a great university!

Please spread widely 🙏

www.jobbnorge.no/en/available...

Associate Professor in molecular/cellular animal physiology (281754) | NTNU - Norwegian University of Science and Technology

Job title: Associate Professor in molecular/cellular animal physiology (281754), Employer: NTNU - Norwegian University of Science and Technology, Deadline: Monday, September 1, 2025

www.jobbnorge.no

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Reposted by Fredrik Jutfelt 🐠

Miriam B. Goodman, PhD @wormsense.bsky.social · Aug 18

#bioscifacjobs

Fredrik Jutfelt 🐠 @jutfelt.bsky.social · Aug 18

Associate Professor position in animal physiology at the Norwegian University of Science and Technology
(to replace me basically). An amazing permanent position at a great university!

Please spread widely 🙏

www.jobbnorge.no/en/available...

Associate Professor in molecular/cellular animal physiology (281754) | NTNU - Norwegian University of Science and Technology

Job title: Associate Professor in molecular/cellular animal physiology (281754), Employer: NTNU - Norwegian University of Science and Technology, Deadline: Monday, September 1, 2025

www.jobbnorge.no

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