Sign in

Daniel Nyqvist

@daninyqvist.bsky.social
432 followers 179 following 20 posts

PhD in Fish Ecology. Biologist working with fish behavior and river restoration at SLU Aqua (Sweden). Also anthropogenic noise, movement ecology, and conservation.

PostsRepliesMedia
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...
2135
Daniel Nyqvist @daninyqvist.bsky.social · 16/09/2025
I don't have any long term monitoring data but I'll share the link with my colleagues.
100
Daniel Nyqvist @daninyqvist.bsky.social · 16/09/2025
Yes, we do. What are you interested in?
100
Daniel Nyqvist @daninyqvist.bsky.social · 16/09/2025
Managed spring-fed irrigation streams constitute a fish biodiversity hotspot in N. Italy. Tracked small-sized fish with PIT-telemetry. “Fish-friendly” partial macrophyte removal supported higher fish abundance than standard clearing. Read paper: www.jlimnol.it/jlimnol/arti...
000
Daniel Nyqvist @daninyqvist.bsky.social · 29/08/2025
Recently published study on a provoked escape response test in Padanian goby. Estimated maximum swimming speed was not repeatable at the individual fish level but consistently different between groups. Overall performance declined between tests. Paper here: www.tandfonline.com/doi/full/10....
041
Reposted by Daniel Nyqvist
SHOAL @shoalorg.bsky.social · 15/07/2025
🐟 Out now: WWF’s new Africa’s Forgotten Fishes report sounds the alarm for Africa’s freshwater fishes and their ecosystems. ❌ 26% of assessed freshwater fish species on the continent are threatened with extinction, and the true number may be even higher. 📘 Read the report: africa.panda.org
001
Reposted by Daniel Nyqvist
Trevor A. Branch @trevorabranch.bsky.social · 02/07/2025
This single effort has made it easier to find and download biology articles and books from the 1700s and 1800s than from the 1900s... (many of the latter are still under copyright)
01210
Daniel Nyqvist @daninyqvist.bsky.social · 01/07/2025
Italian riffle dace photo by Mattia Nocciola.
100
Daniel Nyqvist @daninyqvist.bsky.social · 01/07/2025
New fish passage study on small sized Italian species. Passage success was high for brook barbel and Italian riffle dace, while about half of European bullhead successfully passed the vertical slot fishway. Preference for passage without overhead cover. www.sciencedirect.com/science/arti...
150
Reposted by Daniel Nyqvist
FishSounds @fishsounds.bsky.social · 09/06/2025
🔉🐸🐟🦐🪲 Got freshwater sounds? Consider contributing to the Freshwater Sounds Archive! We're accepting submissions until the end of this year, and all contributors can co-author the resulting data paper. Learn more at fishsounds.net/freshwater.js and www.biorxiv.org/content/10.1...!
02317
Reposted by Daniel Nyqvist
Miguel Clavero @chikichanka.bsky.social · 24/03/2025
En ciencia, igual
0115
Daniel Nyqvist @daninyqvist.bsky.social · 18/03/2025
I work with fish movement, and would like to be added 🐟
110
Daniel Nyqvist @daninyqvist.bsky.social · 13/03/2025
In another paper, we studied the movement of Italian riffle dace in relation to drying in an intermittent part of the same stream. Most fish succesfully migrated upstream to permanently wetted reaches: www.kmae-journal.org/articles/kma...
010
Daniel Nyqvist @daninyqvist.bsky.social · 13/03/2025
Here is a micro-documentary about the study, featuring both the stream and @alfredoschiavon.bsky.social, who led the study as part of his PhD: www.youtube.com/watch?v=BGuc...
youtube.com
Fish in troubled waters - Alfredo
YouTube video by RIBES
100
Daniel Nyqvist @daninyqvist.bsky.social · 13/03/2025
This is a film clip from one of the pools. In the background a temperature and level logger is vissible, interfearing with the pools natural beauty.
100
Daniel Nyqvist @daninyqvist.bsky.social · 13/03/2025
Flood levels during the autumn flood. The flood completely changed many habitat reaches, even turning pools in to riffles. It also triggered both upstream and downstream movments of Italian riffle dace.
100
Daniel Nyqvist @daninyqvist.bsky.social · 13/03/2025
Fish photo by Mattia Nocciola. Check out his webpage: www.mattianocciola.com/vita-sommersa/
mattianocciola.com
VITA SOMMERSA
000
Daniel Nyqvist @daninyqvist.bsky.social · 13/03/2025
We studied movement and habitat use of Italian riffle dace in an Apennine stream over 15 months. Strong preference for pools. Most fish remained stationary, even within pools. Autumn floods triggered dispersal movement. Paper here: link.springer.com/article/10.1...
261
Daniel Nyqvist @daninyqvist.bsky.social · 15/02/2025
NRK about small scale hydropower in Norway (in Norwegian). Little electricity, a lot of bypassed river. www.nrk.no/klima/xl/uni...
nrk.no
Unik kartlegging av små kraftverk i Norge: Gir lite strøm, legger mye elv i rør
­
010
Daniel Nyqvist @daninyqvist.bsky.social · 12/02/2025
Recently published #fishpassage paper from Po river, Italy. We PIT-tagged fish from nine species. Only barbel and Italian chub passed in relatively high numbers. In spring-summer, a few non-native carp and Wels catfish succesfully passed. Paper here: onlinelibrary.wiley.com/doi/10.1002/...
Fishwaybarbelchub
093
Reposted by Daniel Nyqvist
Sociedad Ibérica de Ictiología/Sociedade Ibérica de Ictiologia @sibic.bsky.social · 28/01/2025
1/5✨ Novo Ano, Nova Iniciativa! ✨ Desde a SIBIC, damos as boas-vindas a 2025 com uma empolgante iniciativa criada para despertar o interesse e a curiosidade sobre as fascinantes espécies de peixes que habitam tanto em águas doces quanto marinhas. 🌊🐟 Começamos com o samaruc!
111
Daniel Nyqvist @daninyqvist.bsky.social · 24/01/2025
With @alfredoschiavon.bsky.social and others. Photo by Ambra Alderighi.
000
Daniel Nyqvist @daninyqvist.bsky.social · 24/01/2025
We tagged small sized (down to 35 mm) Padanian goby with 8 mm PIT-tags and tested for effects of tagging on survival, swimming behavior, and burst swimming speeds. No difference between tagged fish and un-tagged control. #fishsci paper here: www.mdpi.com/2073-4441/16...
A Padanian goby (Padogobius bonelli) on pebbles
1122
Reposted by Daniel Nyqvist
Sabrina Imbler @sabs.bsky.social · 10/01/2025
I wrote about the two small fish each embroiled in controversy this week. (Spoiler: Fish Innocent!) defector.com/this-week-in...
defector.com
This Week In Maligned Little Fish | Defector
Two species of tiny, drab, and otherwise forgettable fish—the blotchy brown snail darter and the pale, silvery delta smelt—will never meet in real life. The snail darter swims in rivers and streams in...
110230
Daniel Nyqvist @daninyqvist.bsky.social · 28/11/2024
Nice! @friel.bsky.social maybe I belong here as well? I work with fish behavior and river restoration.
110
Daniel Nyqvist @daninyqvist.bsky.social · 28/11/2024
Exotic European gudgeon is replacing Italian gudgeon in Italian streams and rivers. We tested interspecific differences in the lab. The smaller Italian gudgeon displayed lower maximum swimming speed and substantially higher sympatric mortality. Recent paper here: www.tandfonline.com/doi/full/10....
European gudgeon (Gobio gobio)
0192
Reposted by Daniel Nyqvist
Tom Staveley @tabstaveley.bsky.social · 26/11/2024
bbc.com/future/artic...
bbc.com
After 100 years, salmon have returned to the Klamath River – following a historic dam removal project in California
After being absent for more than a century, salmon have been spotted in Oregon's Klamath River Basin, following a mammoth dam removal project in California.
0112
Reposted by Daniel Nyqvist
Carlos Cano-Barbacil @canobarbacil.bsky.social · 16/11/2024
I made a #Bluesky #FreshwaterEcology and #BiodiversityConservation starter pack. If you'd like to be included, please comment bellow 👇🏼 go.bsky.app/ShC6bp7
587040
Reposted by Daniel Nyqvist
Sam Andrews @oceanoculus.com · 26/11/2024
That "Research effort is also linked to fishery importance..." is sadly not exclusive to reef fish. Just because we aren't directly making 💶 from something doesn't mean its not important. It isn't a question of research interest, but of priorities from funders
011