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Daniel Nyqvist @daninyqvist.bsky.social · 15d

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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Daniel Nyqvist @daninyqvist.bsky.social · 22d

I don't have any long term monitoring data but I'll share the link with my colleagues.

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Daniel Nyqvist @daninyqvist.bsky.social · 22d

Yes, we do. What are you interested in?

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Daniel Nyqvist @daninyqvist.bsky.social · 22d

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...

Daniel Nyqvist @daninyqvist.bsky.social · Aug 29

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....

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Reposted by Daniel Nyqvist

SHOAL @shoalorg.bsky.social · Jul 15

🐟 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

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Reposted by Daniel Nyqvist

Trevor A. Branch @trevorabranch.bsky.social · Jul 2

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)

Trevor A. Branch @trevorabranch.bsky.social · Jul 2

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...

Call for Support: – About BHL

about.biodiversitylibrary.org

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Daniel Nyqvist @daninyqvist.bsky.social · Jul 1

Italian riffle dace photo by Mattia Nocciola.

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Daniel Nyqvist @daninyqvist.bsky.social · Jul 1

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...

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Reposted by Daniel Nyqvist

FishSounds @fishsounds.bsky.social · Jun 9

🔉🐸🐟🦐🪲
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...!

Jack Greenhalgh @wildaudiojack.bsky.social · Jun 9

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

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Reposted by Daniel Nyqvist

Miguel Clavero @chikichanka.bsky.social · Mar 24

En ciencia, igual

Luis Pastor @luispastorart.bsky.social · Mar 24

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.

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Daniel Nyqvist @daninyqvist.bsky.social · Mar 18

I work with fish movement, and would like to be added 🐟

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Daniel Nyqvist @daninyqvist.bsky.social · Mar 13

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...

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Daniel Nyqvist @daninyqvist.bsky.social · Mar 13

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

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Daniel Nyqvist @daninyqvist.bsky.social · Mar 13

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.

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Daniel Nyqvist @daninyqvist.bsky.social · Mar 13

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.

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Daniel Nyqvist @daninyqvist.bsky.social · Mar 13

Fish photo by Mattia Nocciola. Check out his webpage: www.mattianocciola.com/vita-sommersa/

VITA SOMMERSA

www.mattianocciola.com

Daniel Nyqvist @daninyqvist.bsky.social · Mar 13

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...

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Daniel Nyqvist @daninyqvist.bsky.social · Feb 15

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

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Daniel Nyqvist @daninyqvist.bsky.social · Feb 12

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/...

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Reposted by Daniel Nyqvist

Sociedad Ibérica de Ictiología/Sociedade Ibérica de Ictiologia @sibic.bsky.social · Jan 28

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!

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Daniel Nyqvist @daninyqvist.bsky.social · Jan 24

With @alfredoschiavon.bsky.social and others. Photo by Ambra Alderighi.

Daniel Nyqvist @daninyqvist.bsky.social · Jan 24

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

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Reposted by Daniel Nyqvist

Sabrina Imbler @sabs.bsky.social · Jan 10

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

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Daniel Nyqvist @daninyqvist.bsky.social · Nov 28

Nice! @friel.bsky.social maybe I belong here as well? I work with fish behavior and river restoration.

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