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Joacim Näslund

@jnaslund.bsky.social
2.3K followers 806 following 310 posts

Fish biologist (Researcher) at SLU Aqua (Sweden). Swedish fish fauna, river restoration, monitoring, invasive species, stock fish aquaculture, electrofishing, species reintroduction, ethology/behaviour, and general fish ecology. Expressed views are my own.

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Reposted by Joacim Näslund
David Boukal @davidboukal.bsky.social · 16/01/2026
Extended deadline! Until 15 Feb 2026, you can apply for #experimental #PhD position in our group to study species #invasions in the context of climate #warming and #eutrophication together with @kratina.bsky.social, Arnaud Sentis and Otto Seppälä. See bit.ly/4pcWMIV for details.
bit.ly
Opportunities
Web presentation of David Boukal and his research group.
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Joacim Näslund @jnaslund.bsky.social · 12/12/2025
An broader invitation e-mail sent on Nov 27? That's when we got wind of it at our department.
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Joacim Näslund @jnaslund.bsky.social · 21/11/2025
I checked and from what I can find, apparently they can be on hold without having the IF suppressed - suppression can happen in cases of fraudulent citation patterns, but possibly not when the quality is questioned...
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Joacim Näslund @jnaslund.bsky.social · 21/11/2025
If I remember correctly: if put on hold, they don't recieve an impact factor at all until the issue is resolved (then either removed or get the IF back). But I might not remember correctly....
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Joacim Näslund @jnaslund.bsky.social · 21/11/2025
But then it should not have received a 2024 impact factor (i.e the value published in 2025)?
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Joacim Näslund @jnaslund.bsky.social · 21/11/2025
I see it when I search Journal Citation Reports (the "official" impact factor from Clarivate)... It got a 2024 IF of 8.0.
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Joacim Näslund @jnaslund.bsky.social · 31/10/2025
I.e. this one. There is an audiobook in English - that's how I "read" it. eu.patagonia.com/se/en/produc...
eu.patagonia.com
The New Fish: The Truth about Farmed Salmon and the Consequences We Can No Longer Ignore (paperback book) | Patagonia SE
Published by Patagonia, <i>The New Fish</i> reveals the origins of salmon farming and the environmental considerations dismissed in the pursuit of economic gain.
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Joacim Näslund @jnaslund.bsky.social · 31/10/2025
The New Fish (by Simen Sætre and Kjetil Østli) - About salmon aquaculture. Good historical view and insight into how government may affect scientific research (in negative ways). Examples mainly from Norway, but also Canada and som other places.
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Reposted by Joacim Näslund
Nick Brown @steamtraen.eu · 13/10/2025
Next time an institution tells you how seriously it takes research misconduct, ask them if it's *this* seriously. www.bmj.com/content/297/...
In 1916 the BMJ published an article about the work done by James Shearer, an American physician working in the British Army as a sergeant (because he had no British qualification). He had described a
"delineator" which was better than x rays for portraying gunshot wounds. This caused a sensation and a lot of interest — but on investigation the work was found to have been invented. The BMJ published a retraction, but Shearer was tried by court martial and sentenced to death by firing squad.
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Joacim Näslund @jnaslund.bsky.social · 03/10/2025
The answer to the question in the title is: "Just send it to Science of the Total Environment, they'll take almost anything - no convincing of any editors needed..." They are known for publishing both good stuff and pseudoscience...
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Joacim Näslund @jnaslund.bsky.social · 03/10/2025
Seeing how important rivers, even smaller streams, seem to be for troop movements in the Russian invasion of Ukraine, one would expect the military to basically take over the whole river restoration operation...
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Joacim Näslund @jnaslund.bsky.social · 03/10/2025
Is there any discussion about the military defence value of restored wetlands, rivers, forests etc. in Finland? I have tried to raise the issue a bit in Sweden, with some mixed responses (a general interest, but not really sticking in peoples' minds...)
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Reposted by Joacim Näslund
Daniel Nyqvist @daninyqvist.bsky.social · 23/09/2025
New review paper titled "Balancing hydropower production and ecology - ecological impacts, mitigation measures, and programmatic monitoring" published in KMAE. With @jnaslund.bsky.social and others. Read it here: www.kmae-journal.org/articles/kma...
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Joacim Näslund @jnaslund.bsky.social · 25/08/2025
We have a list of all known observed species in Sweden. That could be a basis for searching e.g. newspapers, trying to temporally map the observations. At the very least, such an analysis would show that warm-water species have occurred over at least 150+ years.
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Joacim Näslund @jnaslund.bsky.social · 25/08/2025
Yes, I think it has to be a qualitative analysis, with lots of dicussions around "effort"... records depend a lot on who is working where and when...
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Joacim Näslund @jnaslund.bsky.social · 25/08/2025
There are some possible sources that I have not yet looked through, like the yearbook of the Gothenburg Natural History Museum... and newspapers!
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Joacim Näslund @jnaslund.bsky.social · 25/08/2025
I'm working on a data set ;-) Not for that purpose though... The problem is that descriptive faunistic notes of rare species have basically disappeared from the northern European litterature since ca. 1970, creating a long period of data deficiency.
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Joacim Näslund @jnaslund.bsky.social · 25/08/2025
...but it is also a heavily disturbed ecosystem from the fish community point of view, which could leave the area open for colonization.
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Joacim Näslund @jnaslund.bsky.social · 25/08/2025
The now regular occurrence or even establishment of other species is more indicative I think, e.g. thinlipped mullet, golden grey mullet, surmullet, and tub gurnard...
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Joacim Näslund @jnaslund.bsky.social · 25/08/2025
Possibly climate related, but the Skagerrak area has a long history of warm-temperate species popping up every now and then. To name a few: Antantic fanfish 1929 Blackspot seabream 1869, 1871, 1879, 1960 Little tunny 1909 Plain bonito ca. 1875 Bouge 1931, 1940, 1959 Oceanic whitetip shark 2004
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Joacim Näslund @jnaslund.bsky.social · 25/08/2025
Inviting a new reviewer at the end of a review process (when people drop out) seems unlikely - but I guess they also need at least two reviewer names on the front page... at least it is transparent that way. But likely some bias as they would look for reviewers that will accept...
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Joacim Näslund @jnaslund.bsky.social · 23/08/2025
A major flaw in the Frontiers process (as it was when I reviewed) is, of course, that when a reviewer doesn't agree on publication and withdraw, then there is automatic consensus on publication among remaining reviewers... This possibly lets flawed manuscripts to pass... Maybe it has changed...
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Joacim Näslund @jnaslund.bsky.social · 23/08/2025
My opinion on Frontiers is not positive either, for many reasons. Their process involves a review and a discussion stage with authors (at least a few years ago), and all reviewers have to agree to publication (or withdraw from the process). Reviewer names are then added to paper front page.
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Joacim Näslund @jnaslund.bsky.social · 23/08/2025
Quite interesting. Review seems simlar to Frontiers' format (except 70% "voting" threshold for publishing, rather than 100%)? Actually not sure how it substantially differs from any other open-review journal..?
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Reposted by Joacim Näslund
Eliza Maher Hasselquist @emhasselquist.bsky.social · 14/08/2025
Not from the EU and looking to come to Sweden to do reseach? There is a grant for that! Applications taken through December 2025. www.vr.se/english/appl...
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Joacim Näslund @jnaslund.bsky.social · 13/08/2025
@tabstaveley.bsky.social
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Joacim Näslund @jnaslund.bsky.social · 06/08/2025
Couldn't they possibly just walk around it? See: doi.org/10.1016/j.be...
doi.org
Redirecting
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Joacim Näslund @jnaslund.bsky.social · 25/07/2025
Have no recommendations, but I think PeerJ Preprints closed down several years ago...
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Joacim Näslund @jnaslund.bsky.social · 24/07/2025
Det vanliga verkar vara att 1. nämna något om EBF-mål, 2. få kommentar om att vi inte är i närheten av EBF, och 3. hänvisa till att EU:s gemensamma fiskeripolitik inte tillåter EBF. Men då faller hela målbilden, så varför ens lyfta frågan... helt klart snömos.
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Joacim Näslund @jnaslund.bsky.social · 24/07/2025
Stärker en tes som vi varit näst intill helt säkra på i minst 20 år... Varje gång någon hävdar ekosystembaserad- eller adaptiv förvaltning i sammanhanget havsmiljö/fiske (eller annan miljöförvaltning för den delen) så bör man protestera högljutt...
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Joacim Näslund @jnaslund.bsky.social · 22/07/2025
1973 is even better. Very helpful! Thanks a lot!
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Reposted by Joacim Näslund
Joacim Näslund @jnaslund.bsky.social · 21/07/2025
Fish people! Does anyone have "Check-list of the fishes of the north-eastern Atlantic and of the Mediterranean (CLOFNAM)" (1979)? (unesdoc.unesco.org/ark:/48223/p...). I only need a photo of the synonyms of Atlantic salmon Salmo salar (no PDF needed). #CanIHazPDF #FishSci #TeamFish 🐠🐟🦈
unesdoc.unesco.org
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Joacim Näslund @jnaslund.bsky.social · 21/07/2025
Fish people! Does anyone have "Check-list of the fishes of the north-eastern Atlantic and of the Mediterranean (CLOFNAM)" (1979)? (unesdoc.unesco.org/ark:/48223/p...). I only need a photo of the synonyms of Atlantic salmon Salmo salar (no PDF needed). #CanIHazPDF #FishSci #TeamFish 🐠🐟🦈
unesdoc.unesco.org
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Reposted by Joacim Näslund
Ilya Kashnitsky @ikashnitsky.phd · 17/07/2025
Yet another brilliant blog post by @clauswilke.com in which he presents solid and carefully thought through argumentation on why deliberately publishing fewer papers may be a bad idea, hurting both quantity *and* quality of one's scientific output 👀 clauswilke.substack.com/p/from-the-a...
clauswilke.substack.com
From the archives: No one reads your paper anyway
In 2013, I wrote a blog post about why it’s important to publish scientific results that nobody will read.
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Joacim Näslund @jnaslund.bsky.social · 16/07/2025
What is the point of adding obviously false positive metabarcoding detections to @GBIF? I'm looking at Scandinavian freshwater fishes and spend unnecessary time on filtering out e.g. tropical freshwater fishes "observed" in marine benthic fauna surveys... So much data litter... 🐟🐠
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Joacim Näslund @jnaslund.bsky.social · 13/07/2025
Svaret på det är samma svar som för alla internutbildningar: Det ser bra ut på papper. (att utbildningarna i sig suger, eller är fullkomligt irrelevanta är inte viktigt)
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Joacim Näslund @jnaslund.bsky.social · 09/07/2025
Thanks!
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Reposted by Joacim Näslund
Joacim Näslund @jnaslund.bsky.social · 07/07/2025
#fishsky #teamfish 🐟🐠🐡 Need fish identification help. Is this a smallmouth or largemoth bass?
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Joacim Näslund @jnaslund.bsky.social · 07/07/2025
#fishsky #teamfish 🐟🐠🐡 Need fish identification help. Is this a smallmouth or largemoth bass?
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Joacim Näslund @jnaslund.bsky.social · 03/07/2025
Intressant att man litar så mycket på modellerna, med tanke på att de flesta av parametrarna som går in i modellen är direkta gissningar... Hade jag bedömt detta så hade jag bett om en känslighetsanalys (hur mycket påverkas slutresultatet av varje specifik parameter i modellen).
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Joacim Näslund @jnaslund.bsky.social · 02/07/2025
Take a MDPI journal, put "Discover" in front of its name and voila, you have the Springer Nature version of it.
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Joacim Näslund @jnaslund.bsky.social · 02/07/2025
* Suspiciously short handling times * One million broad journal titles * Shitloads of "special issues" * Soliciting papers via e-mail.
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Joacim Näslund @jnaslund.bsky.social · 02/07/2025
The "Discover" journal series: SpringerNature's attempt to mimic the MDPI/Frontiers concept... link.springer.com/brands/disco...
link.springer.com
Journals | Discover journals
Explore  Discover’s journals by subject area to find a great fit for your research and stay current with the latest scientific advancements.
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Joacim Näslund @jnaslund.bsky.social · 01/07/2025
Worrying news that I had missed completely: EU LIFE at risk...(!) euobserver.com/eu-political...
euobserver.com
The threat to the EU's LIFE programme in the next budget
EU policymakers will soon unveil how they plan to spend the next seven years of the EU budget. Yet the only fund dedicated solely to protecting and conserving the environment – the LIFE programme – is...
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Joacim Näslund @jnaslund.bsky.social · 26/06/2025
Cool, will save this one for later reading. If you haven't seen it, you might be interested in this one from Sweden: doi.org/10.1029/2024..., by @kuglerovastripe.bsky.social and others.
doi.org
Downstream Temperature Effects of Boreal Forest Clearcutting Vary With Riparian Buffer Width
Clearcutting of boreal forests can warm streams, and these temperature effects can be propagated at least 150 m downstream Temperature effects are not only isolated to summer, but instead pattern...
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Reposted by Joacim Näslund
Bruce Stallsmith @laimosemion.bsky.social · 26/06/2025
Hello World, if you have a manuscript involving any kind of parasite(s) in a freshwater ecosystem, we'd like to hear from you and hopefully publish your work in a curated collection hosted by the Journal of Freshwater Ecology. Please feel free to contact me here. 🧪🌍🌿 #TeamFish
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Joacim Näslund @jnaslund.bsky.social · 20/06/2025
Alright. I just looked for the first pictures of a cod skull...
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Joacim Näslund @jnaslund.bsky.social · 19/06/2025
The picture appears just completely black... I've tried to add different file formats, but it just turns black on my computer. Follow the link to see the example if you can't see the image...
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Joacim Näslund @jnaslund.bsky.social · 19/06/2025
It must be the purple bone in the centre of the upper image on the picture below. Some kind of cod fish (gadid) seems reasonable. Picture source: www.reptileevolution.com/gadus.htm
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Joacim Näslund @jnaslund.bsky.social · 28/05/2025
Actually, I see now that this spring the recommendation was 80+, but I think 65+ and whoever else need it still get it for free if they want it.
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