Sam Shry

Picture of thesis. Entitled anadromy in fragmented rivers: downstream passage challenges for migrating salmonids.

Excited to share my thesis is officially nailed! Big thanks to @jacsciart.bsky.social for the amazing cover artwork! If you’d like to join the defense in person or online February 20th, feel free to send me a PM.

Uppsala in late autumn

Join us at the Evolutionary Biology Centre at Uppsala University. We’re searching for an Assistant Professor in Biology. www.uu.se/en/about-uu/...

Assessing metabolic rate and post‐tagging recovery in juvenile fish Juvenile fish play a crucial role in the health of aquatic ecosystems, serving both as the foundation for future adult populations and as a valuable food source. Studying the juvenile life stage of f...

At work, we often anaesthetise, perform surgery on, and tag juvenile fish. We wanted to find out if these procedures impact their oxygen consumption in the following days. Good news, we didn't find cause for concern! 🙂

Open access here: onlinelibrary.wiley.com/doi/10.1111/...

Are you interested in habitat restoration for #diadromous fishes? Abstract submission is now open for the Symposium on Restoration, sponsored by us, taking place in Oulu, Northern Finland! Abstract and applications for #ECR travel grants are open until 15 Feb: bit.ly/3Lx5Jyg #FishSci

Something that I think doesn’t get examined enough is the tendency for technological creep to lead to a reductionist view of ecology where emergent forms and patterns are increasingly reduced to physics and de-contextualized, generalizable theories

Dams as Barriers: Protecting Ecosystems at a Cost - NS Energy Research reveals how dams both hinder native fish migration and help control invasive species. Studies track fish movement, assess climate impacts, and explore innovative restoration strategies.

www.nsenergybusiness.com/analysis/dam...

Increased Survival of European Eel (Anguilla anguilla) After Retrofitting a Hydropower Plant Intake The critically endangered European eel (Anguilla anguilla) faces major threats from hydropower turbines during downstream migration, which is a critical phase in the species' life history. To mitigat...

Increased Survival of European Eel (Anguilla anguilla) After Retrofitting a Hydropower Plant Intake. Ecology of Freshwater Fish 35, no. 2: e70039. doi.org/10.1111/eff.....

#FSBI2026 Breaking Siloes in Fish Biology, convened by Uni of Southampton, aims to bring together scientists from a range of disciplines to explore ways of integrating our research and strengthening relationships with stakeholders and policymakers. Abstract deadline 2/2/26 (17:00): bit.ly/4btHYl1

Why don't we use behavioural ecotoxicological studies in environmental management? Michael Bertram & colleagues assess whether behavioral measures are relevant at the population level. They conclude that, yes, they are and they are underutilised. doi.org/10.1021/acs....
@bbmwong.bsky.social

Image of river protection status in the United States

National assessment of river protection in the U.S.

Article: doi.org/10.1038/s418...
Policy Brief: doi.org/10.1038/s418...
Rivers Explorer: map.myriver.americanrivers.org

Collaboration b/t American Rivers, Conservation Science Partners, Univ WA @americanrivers.bsky.social

Thread 👇 | DM for PDF

🚨 Job Alert! TT Assistant Professor of Marine Biology at the University of Alaska Fairbanks! Looking for a candidate with a focus on coastal ecology. Come be my colleague! Please share.

careers.alaska.edu/jobs/assista...

Evaluation of floating basket incubators for instream reintroductions of fish at early life stages ABSTRACTObjective. Anthropogenic disturbances led to the decline and extirpation of Arctic Grayling Thymallus arcticus populations in the continental Unite

Evaluation of floating basket incubators for instream reintroductions of fish at early life stages, North American Journal of Fisheries Management, 2025;, vqaf118, doi.org/10.1093/najf...

#JFB: Assessing metabolic rate and post-tagging recovery in juvenile fish doi.org/10.1111/jfb.70208 #FishSci

#JFB: Longest documented coastal migrations of shortnose sturgeon doi.org/10.1111/jfb.70205 #FishSci

#JFB: Preliminary insights into fish movements beyond the massive Iron Gate dams on the Danube River using acoustic telemetry doi.org/10.1111/jfb.70204 #FishSci

In and out: factors influencing two decades of straying and homing by Pacific salmon within the Columbia River basin Abstract. In addition to patch size and spatial isolation, habitat quality can also influence attractiveness of patches to dispersing individuals. Using ma

In and out: factors influencing two decades of straying and homing by Pacific salmon within the Columbia River basin. R Soc Open Sci. 1 August 2025; 12 (8): 250447. doi.org/10.1098/rsos...

Shots of our new book in the wild starting to come in! @bgmerkle.bsky.social

Postdoctoral researcher Coastal ecosystem functioning in a changing climate | slu.se SLU - Science and Education for Sustainable Life

Here at SLU Aqua (Uppsala campus, Sweden), we have an exciting 2 yr postdoc open for an ECR with a background in aquatic ecosystem ecology. The position focuses on investigating how land–sea interactions and climate change affect aquatic food webs. Great lab - apply!
🦑🧪🌎🐠
www.slu.se/en/about-slu...

Rivers are messy: Beyond the water bias in research and management This article reviews current trends in interdisciplinary river research to argue that a “water bias” or tendency consider rivers as synonymous with water can hinder our understanding of rivers and con...

"Rivers are messy: Beyond the water bias in research and management" — A new article co-authored by @brdemuth.bsky.social combines historical and natural science ways of thinking about rivers to argue for the importance of understanding them as more than simply channels of water.

✨ STUDY HALL TAKEOVER! ✨
Tomorrow, James Campbell will join us to talk about current positioning methods, state of animal movement models and how the Kaltoa package fits into it. oceantrackingnetwork.org/study-hall/

That's me 👇! I'll be giving a quick overview of my #acoustictelemetry positioning and clock synchronization toolset this thursday at the OTN study hall.

New paper out 🐟📏📉📈!
We explored 50 years of data from 14 Atlantic salmon populations across Eastern Canada to see how body size, age, and life-history diversity have been changing.
bit.ly/3KAvUDt
@icesmarine.bsky.social

🧵👇
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Effects of surgical implantation of electronic tags in fishes: a review and meta-analysis - Reviews in Fish Biology and Fisheries Electronic tags have been used to track fishes for decades and continue to gain popularity. Tags are often implanted in the coelom of fishes, with a substantial body of experimental evidence now asses...

This new paper was a team effort among students in my lab, led by @mitchellshorgan.bsky.social. Please share with your fish tracking colleagues!

@oceantracking.bsky.social @glatos-fish.bsky.social

link.springer.com/article/10.1...

Frontiers | Diel patterns and migration behaviour of sympatric Atlantic salmon (Salmo salar L.) and brown trout (Salmo trutta) smolts during seaward migration Migrations between different habitats to maximise fitness is well documented in many organisms, although such migrations include potentially great risk when ...

Diel patterns and migration behaviour of sympatric Atlantic salmon (Salmo salar L.) and brown trout (Salmo trutta) smolts during seaward migration. Front. Mar. Sci. share.google/smjdrV1Dn8Mo...

Surviving the journey: The migration of smolts from river to sea

Surviving the journey: The migration of smolts from river to sea. PhD Thesis - L.K Sortland share.google/ax6jg8kpxZeL...

Fine-scale behaviour of walleye (Sander vitreus) on a spawning shoal in Hamilton Harbour, Ontario Re-establishment of a naturally reproducing walleye (Sander vitreus) population is a management objective for Hamilton Harbour, western Lake Ontario. …

Fine-scale behaviour of walleye (Sander vitreus) on a spawning shoal in Hamilton Harbour, Ontario

#GreatLakes 🧪

www.sciencedirect.com/science/arti...

Great to see some labmates from McMaster U doing great things. Good job Jon and Mel!

@sjcfishy.bsky.social @calebhasler.bsky.social

A space-based wildlife tracking system that could revolutionize the study of animal migrations and behavior is set to get back online with last week’s SpaceX launch.

Figure with two panels. Left panel: visualisation of a 3D movement track. Right panel: visualisation of the 3D direction of movement as two angles (one horizontal angle and one vertical angle).

We have a preprint about modelling three-dimensional movement tracks, led by @njklappstein.bsky.social.

The model takes the form of a step selection function and, just like in 2D, it can include directional persistence, attraction to targets, and habitat selection.

doi.org/10.1101/2025...

Animal tracking with particle algorithms informs protected area design Particle algorithms strengthen the value of acoustic telemetry for conservation.

Interesting read this morning - new paper on #elasmobranchs and #acoustictelemetry led by Ed Lavender - integrating acoustic telemetry, archival data and particle algorithms to investigate space use within + beyond an MPA, well worth a read! www.science.org/doi/10.1126/...

Inshore marine coastal zone migration patterns in Atlantic salmon post‐smolts emigrating from eight rivers in north‐east Scotland Atlantic salmon, Salmo salar, migrate through multiple habitat types, each having the potential to impact differently upon migration success. The inshore marine coastal zone is arguably disproportion....

Inshore marine coastal zone migration patterns in Atlantic salmon post-smolts emigrating from eight rivers in north-east Scotland. Journal of Fish Biology, 1–16. doi.org/10.1111/jfb....