Daniel Nyqvist

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.

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...

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....

🐟 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

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.

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...

🔉🐸🐟🦐🪲
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...!

En ciencia, igual

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...

YouTube video by RIBES Fish in troubled waters - Alfredo

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.

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.

VITA SOMMERSA

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...

Unik kartlegging av små kraftverk i Norge: Gir lite strøm, legger mye elv i rør ­

NRK about small scale hydropower in Norway (in Norwegian). Little electricity, a lot of bypassed river. www.nrk.no/klima/xl/uni...

Fishway

barbel

chub

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/...

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!

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

A Padanian goby (Padogobius bonelli) on pebbles

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...

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...

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.

European gudgeon (Gobio gobio)

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....

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.

bbc.com/future/artic...

I made a #Bluesky #FreshwaterEcology and #BiodiversityConservation starter pack.

If you'd like to be included, please comment bellow 👇🏼

go.bsky.app/ShC6bp7

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