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Graham Raby

@graham-raby.bsky.social
95 followers 69 following 18 posts

Associate Professor at Trent University (Canada). www.rabylab.com

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Graham Raby @graham-raby.bsky.social · 07/08/2026
Proud of this paper - big undertaking for a BSc honours thesis - by Imogen Bellinger (now a PhD student at Dalhousie). in @jexpbiol.bsky.social Hyperoxia didn't affect warming tolerance or MO2 in trout, even while they were swimming near-maximally. journals.biologists.com/jeb/article/...
journals.biologists.com
Oxygen uptake of rainbow trout during acute warming: effects of oxygen supersaturation and aerobic exercise
Highlighted Article: Oxygen supersaturation does not notably improve the thermal tolerance or metabolic rate of aerobically exercising or static rainbow trout, suggesting that hyperoxia does not mitig...
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Canadian Journal of Fisheries and Aquatic Sciences @cjfas.bsky.social · 30/06/2026
Small pelagic fish make up more than 30% of the global fisheries catch. This collection explores their role in food webs, ecosystems, and sustainable management. Submit your research now ▶️ ow.ly/UPsX50XJYJL #PelagicFish #AquaticResearch #CallForPapers
Close-up of a pile of small pelagic fish with a call for papers on changes in forage communities by the Canadian Journal of Fisheries and Aquatic Sciences.
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 09/06/2026
We have a fully funded PhD position on European eel! Please spread! 🐟 🪱 Main supervisor Josefin Sundin @josefin-sundin.bsky.social at SLU Aqua Stockholm (scholar.google.com/citations?us...). Apply through the portal: www.slu.se/en/about-slu...
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Graham Raby @graham-raby.bsky.social · 19/04/2026
Probably a toss up for me between two films but I'll go with this one
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Graham Raby @graham-raby.bsky.social · 07/04/2026
Looking for prospective MSc students to join @airydunlop.bsky.social and me at Trent for a project focused on spawning behaviour in lake whitefish. Please share/forward to folks who may be interested.
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Journal of Experimental Biology @jexpbiol.bsky.social · 12/02/2026
Congratulations to all of the remarkable ECRs whose research has been recognised in the 2025 JEB Outstanding Paper Prize shortlist Find out about each of the shortlisted papers and their outstanding ECR authors journals.biologists.com/jeb/article/...
The PDF of the News article, Announcing the 2025 Journal of Experimental Biology Outstanding Paper Prize shortlist and winner, by Kathryn Knight. The publishing information at the top states: © 2026. Published by The Company of Biologists | Journal of Experimental Biology (2026) 229, jeb252265. doi:10.1242/jeb.252265.
The first sentence of the article says, 'If you're a fan of comparative physiology, clicking on a new issue of Journal of Experimental Biology can feel like being let loose in an opulent store of treats'. 
The first three shortlisted articles are presented in a box at the top of the second column of text.
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Jeff Bowman @jeffcbowman.bsky.social · 12/02/2026
Now published: Landscape connectivity across Canada and the USA. A seamless, high resolution connectivity map across both countries. 🧪🌎 Open access in Facets, including open data www.facetsjournal.com/doi/full/10....
A map showing the probability of movement for terrestrial animals across Canada and the USA.
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Graham Raby @graham-raby.bsky.social · 10/02/2026
Blog post about our new paper in @amfisheriessoc.bsky.social TAFS
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ProfColinBean @profcolinbean.bsky.social · 28/01/2026
How useful is underwater video as a fisheries assessment tool in temperate freshwater ecosystems?, Transactions of the American Fisheries Society, 2025;, vnaf057, doi.org/10.1093/tafa...
doi.org
How useful is underwater video as a fisheries assessment tool in temperate freshwater ecosystems?
ABSTRACTObjective. Remote underwater video (RUV) is a noninvasive survey technique that has long been used in marine ecosystems and is now gaining interest
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Canadian Journal of Zoology @canjzoology.bsky.social · 09/02/2026
We are inviting submissions for a collection celebrating 30 years of stickleback research from morphology and molecular biology to ecosystem science. For more info 🐟▶️ ow.ly/ygsX50Xrae2 #Stickleback #Evolution #Zoology
X-ray image of a stickleback fish skeleton highlighting three decades of research in the Canadian Journal of Zoology.
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Bradley E. Howell @bradhowelll.bsky.social · 09/02/2026
Really enjoyed the 35th Rice Lake Comparative Physiology & Biochemistry Workshop this weekend. Big shout-out to @graham-raby.bsky.social lab members for sharing some great science.
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Bradley E. Howell @bradhowelll.bsky.social · 02/02/2026
A short feature from @trentuniversity.bsky.social on our research using @innovasea.com predation-sensing telemetry tags to study fish ecology! www.trentu.ca/news/story/2...
trentu.ca
Scientists Testing New Technology to Pinpoint When Fish Become Food
Canada’s top doctoral-level fisheries researcher is uncovering fish interactions with predators and their environment
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Graham Raby @graham-raby.bsky.social · 27/01/2026
Picked up a new field vehicle for our lab this week (a used Toyota Sienna), and we've decided to name it the Burbot Buggy. Working on draft an image to put on the keychain...
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Conservation Physiology @conphysjournal.bsky.social · 07/01/2026
On behalf of all the Editors at #ConPhys we would like to say a big THANK YOU to everyone who has reviewed for us in 2025. Your contributions are truly appreciated.
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Canadian Journal of Fisheries and Aquatic Sciences @cjfas.bsky.social · 23/12/2025
A home for contaminants research is here! Contaminants, Environment, and Society publishes insights that link science, community, and policy. Check out the scope and submit your research ▶️ ow.ly/czCj50Xuof8 #PollutionResearch #OpenForSubmissions #Microplastics
Cover of Contaminants, Environment, and Society journal showing a wetland with trees and a blue sky. Announcement of submissions opening.
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Journal of Experimental Biology @jexpbiol.bsky.social · 06/01/2026
JEB is excited to welcome a new Editor, Graham Scott from McMaster University, but we are also sad to be saying goodbye to Pat Wright, who has been a longstanding member of the team & was Deputy Editor-in-Chief from 2020 with responsibility for ECRs journals.biologists.com/jeb/article/...
Graham Scott (left) is joining the team of JEB Monitoring Editors and Pat Wright (right) is stepping down as a JEB Editor.
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Graham Raby @graham-raby.bsky.social · 29/12/2025
How useful is underwater video as a fisheries assessment tool in freshwater? @jacobbowman.bsky.social asked this question for his honours thesis, by comparing video against other ways of counting fish. Editor's Choice in TAFS: academic.oup.com/tafs/advance...
academic.oup.com
How useful is underwater video as a fisheries assessment tool in temperate freshwater ecosystems?
ABSTRACTObjective. Remote underwater video (RUV) is a noninvasive survey technique that has long been used in marine ecosystems and is now gaining interest
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Trent Centre for Communicating Conservation @trentconservation.bsky.social · 09/12/2025
New Year's coming, and with it more great conservation talks! This January's it'll be Trent's own Dr. Mary-Claire Buell, on bringing community + environmental forensics together in investigations of pollution. Should be great!
A photo of two figures in waders, walking through a swamp in beautiful sunny weather next to green, long grasses. The text reads Pollution, People, and Place: Community-Driven Investigations into Environmental Contaminants. Jan 13, 7:30 pm, Upstairs at The Publican. 294 Charlotte St. Dr. Mary-Claire Buell. School of the Environment and Department of Forensic Science, Trent University.
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Graham Raby @graham-raby.bsky.social · 05/12/2025
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...
link.springer.com
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...
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Trent Centre for Communicating Conservation @trentconservation.bsky.social · 28/11/2025
And we're back in action Dec 9th! Join us at the Publican at 7:30 pm for drinks, good company, and an account of the conservation fight for arctic shorebirds with Paul A. Smith
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Graham Raby @graham-raby.bsky.social · 18/11/2025
In this new study, we provide new data relevant to the debate about whether oxygen limitation is a universal driver of thermal tolerance in water breathing animals. News story: www.trentu.ca/news/story/2... Paper: journals.plos.org/plosbiology/... Primer: journals.plos.org/plosbiology/...
trentu.ca
More Oxygen Won’t Save Fish from Warming Waters
Trent study helps inform long-standing theory about increasing oxygen levels in higher water temperatures to support heat tolerance in aquatic species
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cars-afs.bsky.social @cars-afs.bsky.social · 02/11/2025
CONGRATULATIONS! Larkin Award, PhD Winner #BradleyHowell 🪼 [Graham Raby, #TrentUniversity & Steven Cooke, #CarletonUniversity] 🪼 Bradley’s research focuses on using telemetry and respirometry data to assess #predatorprey interactions and movement patterns that raise predation risk.
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PLOS Biology @plosbiology.org · 06/11/2025
Oxygen limitation is considered a key mechanism of #ThermalTolerance. @dianasmadeira.bsky.social explores how a @plosbiology.org study challenges this idea, showing minimal protective effects of O2 supersaturation in heat-stressed #aquatic #ectotherms 🧪 Paper: plos.io/43hzMQa Primer: plos.io/3XeUtbS
The effects of temperature on organismal performance are depicted using thermal performance curves, where performance is greatest at the optimal temperature and starts to decrease toward cooler or warmer temperatures, reflecting the thermal window (tolerable range of temperatures) of the species. Briefly, the Oxygen and Capacity Limited Thermal Tolerance hypothesis proposes that oxygen limitation explains the performance decline at high temperatures and sets the first boundary for thermal limits across ectotherms. This is due to a mismatch between the oxygen demand of the organism and the capacity of the cardiorespiratory system to supply oxygen to tissues when the organism is under warming. This concept is central to predict species responses to warming. As oxygen supersaturation in water has been shown to alleviate oxygen supply limitations by increasing maximum rates of oxygen transport in blood, Raby and colleagues (2025) tested the effects of oxygen supersaturation on thermal tolerance across 14 aquatic species. The authors found that it had negligible effects on upper thermal limits, challenging the oxygen limitation hypothesis as a universal mechanism underpinning thermal tolerance of aquatic ectotherms. The authors highlight that oxygen supersaturation in water, a naturally occurring phenomenon in shallow waters, may not protect aquatic species from the effects of extreme heat.
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PLOS Biology @plosbiology.org · 05/11/2025
Oxygen supersaturation is proposed to buffer against #HeatStress in water-breathing animals. @graham-raby.bsky.social @jutfelt.bsky.social &co re-examine this question in diverse #aquatic #ectotherms, showing that #hyperoxia has minimal impact on thermal tolerance @plosbiology.org 🧪 plos.io/43hzMQa
 Effect of hyperoxia (150% air saturation) on warming tolerance in 14 aquatic ectotherms from across the globe. Left: Forest plot showing effect sizes (model estimates ± 95% confidence intervals) for the effect of hyperoxia on warming tolerance. Black symbols are the fast warming (0.3°C min−1) trials, blue symbols are the slow warming (1°C h−1) trials, and yellow symbols are for a net combined effect with random effects for subgroups of the 24 experiments. The effects were considered statistically significant where the 95% confidence interval does not cross the red vertical line. Right: Approximate geographical distributions for the 10 species of fish (top) and four species of decapod crustaceans (bottom) used in the laboratory experiments to assess the effects of hyperoxia on upper thermal tolerance.
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PLOS Biology @plosbiology.org · 06/11/2025
Oxygen limitation is considered a key mechanism of #ThermalTolerance. @dianasmadeira.bsky.social explores how a @plosbiology.org study challenges this idea, showing minimal protective effects of O2 supersaturation in heat-stressed #aquatic #ectotherms 🧪 Paper: plos.io/43hzMQa Primer: plos.io/3XeUtbS
The effects of temperature on organismal performance are depicted using thermal performance curves, where performance is greatest at the optimal temperature and starts to decrease toward cooler or warmer temperatures, reflecting the thermal window (tolerable range of temperatures) of the species. Briefly, the Oxygen and Capacity Limited Thermal Tolerance hypothesis proposes that oxygen limitation explains the performance decline at high temperatures and sets the first boundary for thermal limits across ectotherms. This is due to a mismatch between the oxygen demand of the organism and the capacity of the cardiorespiratory system to supply oxygen to tissues when the organism is under warming. This concept is central to predict species responses to warming. As oxygen supersaturation in water has been shown to alleviate oxygen supply limitations by increasing maximum rates of oxygen transport in blood, Raby and colleagues (2025) tested the effects of oxygen supersaturation on thermal tolerance across 14 aquatic species. The authors found that it had negligible effects on upper thermal limits, challenging the oxygen limitation hypothesis as a universal mechanism underpinning thermal tolerance of aquatic ectotherms. The authors highlight that oxygen supersaturation in water, a naturally occurring phenomenon in shallow waters, may not protect aquatic species from the effects of extreme heat.
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Graham Raby @graham-raby.bsky.social · 06/11/2025
Very exciting to finally have this work out there. Thanks to the team at @plosbiology.org for being willing to publish null results!
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Graham Raby @graham-raby.bsky.social · 05/11/2025
Special thanks to @dianasmadeira.bsky.social for authoring this thoughtful primer about the study we published this week in @plosbiology.org Good suggestions about all the work we still need to do to unveil the mechanisms underlying variation in thermal tolerance. journals.plos.org/plosbiology/...
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PLOS Biology @plosbiology.org · 05/11/2025
Oxygen supersaturation is proposed to buffer against #HeatStress in water-breathing animals. @graham-raby.bsky.social @jutfelt.bsky.social &co re-examine this question in diverse #aquatic #ectotherms, showing that #hyperoxia has minimal impact on thermal tolerance @plosbiology.org 🧪 plos.io/43hzMQa
 Effect of hyperoxia (150% air saturation) on warming tolerance in 14 aquatic ectotherms from across the globe. Left: Forest plot showing effect sizes (model estimates ± 95% confidence intervals) for the effect of hyperoxia on warming tolerance. Black symbols are the fast warming (0.3°C min−1) trials, blue symbols are the slow warming (1°C h−1) trials, and yellow symbols are for a net combined effect with random effects for subgroups of the 24 experiments. The effects were considered statistically significant where the 95% confidence interval does not cross the red vertical line. Right: Approximate geographical distributions for the 10 species of fish (top) and four species of decapod crustaceans (bottom) used in the laboratory experiments to assess the effects of hyperoxia on upper thermal tolerance.
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Jeremy De Bonville @jaydebon.bsky.social · 05/11/2025
Very happy and proud to see this one published! Have a look at this global assessment of the effect – or lack of effect – of extra oxygen (hyperoxia) on ectotherm thermal tolerance! Led by @graham-raby.bsky.social and a team of incredible collaborators working on multiple taxa 🐟 🐠 🦀 🦐.
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 05/11/2025
Oxygen supersaturation has been reported to protect aquatic animals from heat waves. We tested this in a large collaborative experiment on many species of fish and crustaceans. Our new paper in @plosbiology.org shows that the effect of hyperoxia on thermal tolerance is negligible. Unfortunately.
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Graham Raby @graham-raby.bsky.social · 23/10/2025
Boat salad
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Graham Raby @graham-raby.bsky.social · 16/10/2025
We have the most photogenic campus
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Gary Burness @garyburness.bsky.social · 01/10/2025
Excited about a new preprint from PhD candidate Megan Heft, showing that nestling provisioning rates in male tree swallows are not limited by the male's risk of overheating (in contrast with previous studies of females) 🧪 #ornithology #science www.biorxiv.org/content/bior...
biorxiv.org
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Graham Raby @graham-raby.bsky.social · 26/09/2025
If you're a fish tracking nerd you know and love the sight of this pink foam
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Graham Raby @graham-raby.bsky.social · 08/09/2025
Caught a couple northern sunfish in a beach seine today; first time ever seeing these for me (in the Otonabee River near Trent U).
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Graham Raby @graham-raby.bsky.social · 04/09/2025
tick tock
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Methods in Ecology and Evolution @methodsinecoevol.bsky.social · 25/08/2025
📖Published📖 Raby et al. provide a comprehensive, practical guide for designing and conducting experiments to measure critical thermal limits, with an emphasis on CTmax 🌍 🧪 👇 buff.ly/iZN6Xdg
Diagram of a template design for a CTmax apparatus. Aeration, mixing mechanisms (pump), and heating elements are in an ‘equipment section’ that is physically separated with a screen from the part of the arena containing the animals (‘animal arena’; here with fish). A submerged temperature sensor (or data logger) is used to log temperatures, in addition to a temperature sensor with a display that is used to score CTmax in real time. The time and temperature should only be visible to the data recorder (and/or video camera), not to the person observing animals for end points.
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Fredrik Jutfelt 🐠 @jutfelt.bsky.social · 25/08/2025
Check out our new review on how to measure thermal tolerance! 🐟🌡️🧪
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The FSBI @thefsbi.bsky.social · 23/08/2025
#JFB: Validation of a new acoustic telemetry transmitter for the study of predation events in small fishes doi.org/10.1111/jfb.15827 #FishSci
doi.org
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Graham Raby @graham-raby.bsky.social · 22/08/2025
is this what the discovery grant panel looks like
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Graham Raby @graham-raby.bsky.social · 21/08/2025
Incredibly nerdy paper, but should be useful I think. This was a product of a pre-SEB writing retreat a bunch of had in Czechia last year.
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Jeremy De Bonville @jaydebon.bsky.social · 21/08/2025
Raby lab retreat this week at Harkness Lab of Fisheries Research was a great success! Thanks to the ghost of F.E.J. Fry for writing inspiration 👻🐟
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