Daniel Nyqvist
@daninyqvist.bsky.social
PhD in Fish Ecology. Biologist working with fish behavior and river restoration at SLU Aqua (Sweden). Also anthropogenic noise, movement ecology, and conservation.
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...
September 23, 2025 at 4:37 PM
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...
I don't have any long term monitoring data but I'll share the link with my colleagues.
September 16, 2025 at 11:41 AM
I don't have any long term monitoring data but I'll share the link with my colleagues.
Yes, we do. What are you interested in?
September 16, 2025 at 11:20 AM
Yes, we do. What are you interested in?
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...
September 16, 2025 at 11:16 AM
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...
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....
August 29, 2025 at 9:05 AM
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....
Reposted by Daniel Nyqvist
🐟 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
❌ 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
July 15, 2025 at 8:06 AM
🐟 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
❌ 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
Reposted by Daniel Nyqvist
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)
Foundations: please step up and take over the Biodiversity Heritage Library (BHL). This is an absolutely essential scanned archive of all of the old journals and books from the 1500s to about 1920. Has been indispensable for my research.
about.biodiversitylibrary.org/call-for-sup...
about.biodiversitylibrary.org/call-for-sup...
Call for Support: – About BHL
about.biodiversitylibrary.org
July 2, 2025 at 4:24 PM
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)
Italian riffle dace photo by Mattia Nocciola.
July 1, 2025 at 3:07 PM
Italian riffle dace photo by Mattia Nocciola.
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...
July 1, 2025 at 3:06 PM
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...
Reposted by Daniel Nyqvist
🔉🐸🐟🦐🪲
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...!
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...!
Contribute to the first global archive of soniferous freshwater life, The Freshwater Sounds Archive, and receive recognition as a co-author in a resulting data paper!
Pre-print now available. New deadline: 31st Dec, 2025.
See link 👇4 more fishsounds.net/freshwater.js
Pre-print now available. New deadline: 31st Dec, 2025.
See link 👇4 more fishsounds.net/freshwater.js
June 9, 2025 at 10:49 PM
🔉🐸🐟🦐🪲
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...!
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...!
Reposted by Daniel Nyqvist
En ciencia, igual
Consejo a artistas jovenes (y no tan jovenes):
Los otros\as artistas no son tus competidores, son aliados, forja amistades y ayuda a quien puedas. Crear o ser parte de una comunidad, por virtual que sea, siempre sera beneficioso y enriquecedor para todas las partes.
Los otros\as artistas no son tus competidores, son aliados, forja amistades y ayuda a quien puedas. Crear o ser parte de una comunidad, por virtual que sea, siempre sera beneficioso y enriquecedor para todas las partes.
March 24, 2025 at 12:22 PM
En ciencia, igual
I work with fish movement, and would like to be added 🐟
March 18, 2025 at 1:26 PM
I work with fish movement, and would like to be added 🐟
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...
March 13, 2025 at 3:10 PM
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...
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...
Fish in troubled waters - Alfredo
YouTube video by RIBES
www.youtube.com
March 13, 2025 at 2:31 PM
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...
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.
March 13, 2025 at 2:28 PM
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.
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.
March 13, 2025 at 2:22 PM
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.
Fish photo by Mattia Nocciola. Check out his webpage: www.mattianocciola.com/vita-sommersa/
VITA SOMMERSA
www.mattianocciola.com
March 13, 2025 at 2:18 PM
Fish photo by Mattia Nocciola. Check out his webpage: www.mattianocciola.com/vita-sommersa/
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...
March 13, 2025 at 2:16 PM
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...
NRK about small scale hydropower in Norway (in Norwegian). Little electricity, a lot of bypassed river. www.nrk.no/klima/xl/uni...
Unik kartlegging av små kraftverk i Norge: Gir lite strøm, legger mye elv i rør
www.nrk.no
February 15, 2025 at 4:07 PM
NRK about small scale hydropower in Norway (in Norwegian). Little electricity, a lot of bypassed river. www.nrk.no/klima/xl/uni...
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/...
February 12, 2025 at 3:58 PM
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/...
Reposted by Daniel Nyqvist
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!
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!
January 28, 2025 at 7:10 PM
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!
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!
With @alfredoschiavon.bsky.social and others. Photo by Ambra Alderighi.
January 24, 2025 at 1:06 PM
With @alfredoschiavon.bsky.social and others. Photo by Ambra Alderighi.
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...
January 24, 2025 at 1:04 PM
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...
Reposted by Daniel Nyqvist
I wrote about the two small fish each embroiled in controversy this week. (Spoiler: Fish Innocent!) defector.com/this-week-in...
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...
defector.com
January 10, 2025 at 7:11 PM
I wrote about the two small fish each embroiled in controversy this week. (Spoiler: Fish Innocent!) defector.com/this-week-in...
Nice! @friel.bsky.social maybe I belong here as well? I work with fish behavior and river restoration.
November 28, 2024 at 9:05 PM
Nice! @friel.bsky.social maybe I belong here as well? I work with fish behavior and river restoration.