7,000 years before farming reached Scandinavia, hunter-gatherers carried live trout past waterfalls to stock fishless mountain lakes. Newly dated fish traps at Lake Tesse, Norway show planned ecosystem management long before agriculture. 🐟🏔️🦴 #Archaeology #Mesolithic @antiquity.ac.uk

The Fish That Shouldn’t Have Been There

Every trout in the Norwegian mountains got there because someone carried it.

anthropology.net

There's something fishy going on in the frigid, dark depths of Lake Superior. Scientists have discovered a growing number of emaciated lake trout deep in Lake Superior, about half their normal body weight, dubbing them "zombie fish." They’re racing to learn what’s behind the phenomenon.

Researchers perplexed by growing numbers of 'zombie' fish deep in Lake Superior

Scientists have discovered a growing number of emaciated lake trout deep in Lake Superior, about half their normal body weight. They’re racing to learn what’s behind the phenomenon.

mprnews.org

🔔Paper Alert🔔 Genomics🧬morphometrics 📐 and acoustic telemetry 🔉 to investigate a recovering Atlantic salmon population🐟 Check it out #OpenAccess 👉 link.springer.com/article/10.1...

Genomic, morphological and migratory patterns in recovering Atlantic salmon populations - Aquatic Sciences

Population recovery is a key goal for conservation, but our understanding of how genetic and phenotypic variation, including local adaptation, emerges in recently recolonised or recovering systems is ...

link.springer.com

🐟🌡️🧪 New study from #ThermoEvo project @luke.fi: Juvenile Atlantic salmon show no increase in aerobic scope during an ecologically realistic #heatwave. This suggests limited capacity to cope with higher oxygen demand in warming rivers, when O2 costs increase. onlinelibrary.wiley.com/doi/10.1111/...

Ever needed to measure the morphological features of your organism across hundreds of images? 🤯 HusMorph uses #MachineLearning to detect morphological landmarks in the image, speeding up your #ImageAnalysis time! Read it here: doi.org/10.1093/conp...

🐟 CALL FOR ABSTRACTS OPEN for #NoWPaS2026! 📍 Hólar University, Iceland 🇮🇸 📅 March 2–7, 2026 🧑‍🔬 For early career researchers on anadromous salmonids 🗓️ Deadline: Nov 10, 2025 👉 forms.gle/unryb2EZEcp1... ℹ️ nowpas.wordpress.com Join us in Iceland for science, salmonids, and connections!

NoWPaS 2026 Application form

NoWPaS (International formerly Nordic Workshop for PhD and Post-Doctoral fellows on Anadromous Salmonid research) is an annual workshop, which aims to build and maintain an international network of ea...

forms.gle

#JFB: Spatial ecology and population dynamics of brown trout 𝘚𝘢𝘭𝘮𝘰 𝘵𝘳𝘶𝘵𝘵𝘢 L. in reservoirs and headwater tributaries doi.org/10.1111/jfb.15814 #FishSci

2 results, and 3 speculations from this paper: academic.oup.com/jeb/advance-... Results: (1) Greenlandic stickleback co-occurring with Arctic char are bigger and (2) have relatively smaller heads than when stickleback are alone in a lake.

Predator-mediated resource limitation shapes body and head size variation in stickleback populations

Abstract. Predator and prey communities are important putative drivers of phenotypic variation in consumers. However, in natural food webs, we often lack a

academic.oup.com

Excited that the latest work from my PhD is available as a pre-print! (doi.org/10.1101/2025...) We explore the challenges in delineating conservation units within highly diverse species using the salmonid species Arctic charr as a study system!

Defining conservation units in a highly diverse species: A case on Arctic charr

Defining appropriate conservation units is crucial to the protection and management of biodiversity. These delineations deliver further benefit when they encompass assessments of population vulnerabil...

doi.org

#JFB: A common garden experiment in the wild reveals heritable differences in migration tendencies among brown trout populations doi.org/10.1111/jfb.16068 #FishSci

Will you help us save #ArcticCharr from extinction in the #LakeDistrict? Our campaign to raise funds for the Lake District Charr Recovery & Management (LD-CHARM) project has just launched! From 22-29 April your donations will be doubled! Find out more & donate: donate.biggive.org/campaign/a05...

Super happy to see our new article on how pharmaceutical pollution can influence salmon migration out in @science.org! This was a huge effort by a great team of researchers over the last few years! You can read the paper here: science.org/doi/10.1126/sc…!

We are looking for a post doc (2 year position) to work on fundamental and applied salmonid migration ecology. Work place is Eawag in Kastanienbaum, Switzerland, located on the shores of Lake Lucerne. See more here: apply.refline.ch/673277/1241/...

When baby salmon emerge from the gravel, how far do they disperse to summer rearing grounds? We haven't known until now (at least at the population scale), because they're too small to tag. In a paper just out, we answered this question using parentage-based (genetic) tagging! tinyurl.com/39b2sfjd

Watershed-scale dispersal patterns of juvenile Chinook Salmon (Oncorhynchus tshawytscha) revealed through genetic parentage analysis - Movement Ecology

Background For many aquatic taxa, juvenile dispersal from spawning locations to rearing habitats is a critical process influencing individual fitness and population dynamics. However, our understandin...

movementecologyjournal.biomedcentral.com

Trout will eat shrews when available (sometimes gorging on them) & are not affected by their venom or objectionable taste.

Weird Nature: Shrew-Eating Trout!

From Togiak National Wildlife Refuge in Alaska comes this story of a gluttonous, mammal-eating rainbow trout. Just when you thought it was safe to go back in the water...

blog.nature.org

🚨 New Paper Alert 🚨 Interested in fish #migration 🐟, acoustic #telemetry 🔊, #genomics 🧬, and #morphometrics 📐? Check out how we combined them all in this study! Read it here #OpenAccess 👉 onlinelibrary.wiley.com/doi/10.1002/...

Atlantic #salmon, brown #trout and their hybrids can be difficult to distinguish, especially at early life stages. This new DNA-based method can be used to screen lots of individuals to verify the species or detect hybrids! 🧪🐟 With a low-cost DNA extraction, it is less than 1 euro / sample.

Fast and cost‐efficient species identification of Atlantic salmon (Salmo salar L.), brown trout (Salmo trutta), and their hybrids using a single SNP marker

A workflow for developing a cost- and time-efficient, single nucleotide polymorphism (SNP)-based assay for species and hybrid identification is described. In a reference set (n = 46), the developed a....

onlinelibrary.wiley.com

Angling creates hook shy pike, our latest paper finds. onlinelibrary.wiley.com/doi/full/10....

Getting Scarce and Lure Shy: Impacts of Recreational Fishing on Coastal Northern Pike (Esox lucius) Abundance, Size Structure and Vulnerability to Angling

Controlled experiments have shown that northern pike (Esox lucius) is able to develop lure avoidance, but whether such patterns exist in the wild is unknown. We assessed the impact of recreational fi...

onlinelibrary.wiley.com

Paper alert: We used acoustic telemetry combined with stable isotope analyses in a southwest Greenland fjord to investigate marine migrations, thermal habitat use, and marine feeding habits of Arctic charr cdnsciencepub.com/doi/pdf/10.1... @oceantracking.bsky.social @aquatictracking.bsky.social

Now for some good news: "Seven decades after overfishing and invasive species nearly wiped them off the map, Lake Superior’s lake trout population has finally recovered." via @bridgemichigan.bsky.social www.bridgemi.com/michigan-env...

Once near extinction, lake trout are officially recovered in Lake Superior | Bridge Michigan

A binational group of fisheries experts made the declaration Wednesday, after seven decades of effort to recover the fish from a collapse caused by invasive species and overfishing.

bridgemi.com