Harkness Laboratory of Fisheries Research
@harknesslab.bsky.social
Harkness Laboratory of Fisheries Research. An Ontario Ministry of Natural Resources field station on Lake Opeongo, Algonquin Park. Beginning in May 1936.
Posting: Mark Ridgway
Harkness.ca
Posting: Mark Ridgway
Harkness.ca
Reposted by Harkness Laboratory of Fisheries Research
Some lecture notes on spatial and temporal modelling, illustrated using R - darrenjw.github.io/spatio-tempo... - #rstats #rspatial #quarto
Spatial and temporal statistics
darrenjw.github.io
January 1, 2026 at 12:31 PM
Some lecture notes on spatial and temporal modelling, illustrated using R - darrenjw.github.io/spatio-tempo... - #rstats #rspatial #quarto
Reposted by Harkness Laboratory of Fisheries Research
For Day 9 of #25DaysOfFishmas, we're heading back to Australia to meet perhaps the most evolutionarily isolated species on our list. This is Lepidogalaxias salamandroides, the salamanderfish, which is not only the only member of its family, nor order, but is the only member of its *superorder*!
December 9, 2025 at 10:07 AM
For Day 9 of #25DaysOfFishmas, we're heading back to Australia to meet perhaps the most evolutionarily isolated species on our list. This is Lepidogalaxias salamandroides, the salamanderfish, which is not only the only member of its family, nor order, but is the only member of its *superorder*!
Our latest.... among lakes & over a decade in a large lake. A stationary habitat model
Some Like It Cold: A General Habitat Association Model for Smallmouth Bass in Stratified Lakes - Ridgway - 2026 - Ecology of Freshwater Fish - Wiley Online Library onlinelibrary.wiley.com/doi/10.1111/...
Some Like It Cold: A General Habitat Association Model for Smallmouth Bass in Stratified Lakes - Ridgway - 2026 - Ecology of Freshwater Fish - Wiley Online Library onlinelibrary.wiley.com/doi/10.1111/...
Some Like It Cold: A General Habitat Association Model for Smallmouth Bass in Stratified Lakes
Models describing associations between fish distribution and environmental or spatial gradients at the population level have the potential to be transferrable if model parameters are stationary among....
onlinelibrary.wiley.com
December 7, 2025 at 2:28 AM
Our latest.... among lakes & over a decade in a large lake. A stationary habitat model
Some Like It Cold: A General Habitat Association Model for Smallmouth Bass in Stratified Lakes - Ridgway - 2026 - Ecology of Freshwater Fish - Wiley Online Library onlinelibrary.wiley.com/doi/10.1111/...
Some Like It Cold: A General Habitat Association Model for Smallmouth Bass in Stratified Lakes - Ridgway - 2026 - Ecology of Freshwater Fish - Wiley Online Library onlinelibrary.wiley.com/doi/10.1111/...
Reposted by Harkness Laboratory of Fisheries Research
🌡️ Alternative behavioral responses can buffer animals from environmental stress, yet the trade-offs of habitat selection remain poorly understood. Using a bioenergetics framework, researchers show different energetic strategies for a cold-water fish
➡️ buff.ly/l1GIXBf
➡️ buff.ly/l1GIXBf
November 11, 2025 at 1:02 PM
🌡️ Alternative behavioral responses can buffer animals from environmental stress, yet the trade-offs of habitat selection remain poorly understood. Using a bioenergetics framework, researchers show different energetic strategies for a cold-water fish
➡️ buff.ly/l1GIXBf
➡️ buff.ly/l1GIXBf
Reposted by Harkness Laboratory of Fisheries Research
New in Arctic Science: Long-term vertebrate research and monitoring sites in Arctic Canada explores decades of wildlife studies across the North and the lasting legacy of these field stations.
Read more ▶️ buff.ly/hluh47u
#ArcticScience #WildlifeResearch #ArcticCanada
Read more ▶️ buff.ly/hluh47u
#ArcticScience #WildlifeResearch #ArcticCanada
October 6, 2025 at 9:38 PM
New in Arctic Science: Long-term vertebrate research and monitoring sites in Arctic Canada explores decades of wildlife studies across the North and the lasting legacy of these field stations.
Read more ▶️ buff.ly/hluh47u
#ArcticScience #WildlifeResearch #ArcticCanada
Read more ▶️ buff.ly/hluh47u
#ArcticScience #WildlifeResearch #ArcticCanada
Reposted by Harkness Laboratory of Fisheries Research
Wishing you calm seas @alltooclearfilm.bsky.social! In partnership with @harknesslab.bsky.social and @lakeheaduniversity.bsky.social, we will be sinking an autonomous up-looking echosounder that will ping 24/7 to help understand the diel behaviour of fish and zoop at Sup Shoal. Be sure to tune in!
Pre-dawn departure from Duluth - steaming for 24 hours to get to the Superior Shoal. @CTVLondon picked up the story, check it out:
www.ctvnews.ca/london/artic...
See the Superior Shoal for yourself on the LIVEstream this Sunday 3-5pm ET. www.youtube.com/live/oKB_iw8...
www.ctvnews.ca/london/artic...
See the Superior Shoal for yourself on the LIVEstream this Sunday 3-5pm ET. www.youtube.com/live/oKB_iw8...
Bruce County filmmakers searching Great Lake for ‘Freshwater Everest’
The research vessel, Blue Heron, left Duluth this morning, steaming towards a once in a lifetime underwater research opportunity in Lake Superior.
www.ctvnews.ca
September 10, 2025 at 1:24 PM
Wishing you calm seas @alltooclearfilm.bsky.social! In partnership with @harknesslab.bsky.social and @lakeheaduniversity.bsky.social, we will be sinking an autonomous up-looking echosounder that will ping 24/7 to help understand the diel behaviour of fish and zoop at Sup Shoal. Be sure to tune in!
Reposted by Harkness Laboratory of Fisheries Research
Aren't they lovely? Congratulations to my great colleague Bud Freeman, this is the culmination of over a decade of work!
www.mapress.com/zt/article/v...
www.mapress.com/zt/article/v...
Two new species of Micropterus (Centrarchidae) endemic to Atlantic Slope river drainages in Georgia, South Carolina and North Carolina, U.S.A.
| Zootaxa
www.mapress.com
August 19, 2025 at 1:16 PM
Aren't they lovely? Congratulations to my great colleague Bud Freeman, this is the culmination of over a decade of work!
www.mapress.com/zt/article/v...
www.mapress.com/zt/article/v...
Reposted by Harkness Laboratory of Fisheries Research
1/ Who published the first freshwater food web? American ecologist Victor Shelford may have done so (see below) in his classic 1913 monograph "Animal communities in temperate America as illustrated in the Chicago region", a book that inspired Charles Elton (who cited it in Animal Ecology)...
August 15, 2025 at 2:38 AM
1/ Who published the first freshwater food web? American ecologist Victor Shelford may have done so (see below) in his classic 1913 monograph "Animal communities in temperate America as illustrated in the Chicago region", a book that inspired Charles Elton (who cited it in Animal Ecology)...
Reposted by Harkness Laboratory of Fisheries Research
Some great talks on fish metabolism, thermal tolerance, and bioenergetics by folks from @trentuniversity.bsky.social at this year’s #SEBconference in Antwerp, Belgium.
@sebiology.bsky.social
@erinmcstewart.bsky.social
@jaydebon.bsky.social
@chris-on-fish.bsky.social
@sebiology.bsky.social
@erinmcstewart.bsky.social
@jaydebon.bsky.social
@chris-on-fish.bsky.social
July 10, 2025 at 11:18 AM
Some great talks on fish metabolism, thermal tolerance, and bioenergetics by folks from @trentuniversity.bsky.social at this year’s #SEBconference in Antwerp, Belgium.
@sebiology.bsky.social
@erinmcstewart.bsky.social
@jaydebon.bsky.social
@chris-on-fish.bsky.social
@sebiology.bsky.social
@erinmcstewart.bsky.social
@jaydebon.bsky.social
@chris-on-fish.bsky.social
Reposted by Harkness Laboratory of Fisheries Research
Think La Niña years are “cool”? Not anymore. Even our coolest years today are hotter than the hottest El Niño years of the past. Climate change is flipping the script — fast. A huge thank you to @zacklabe.com for his amazing graphic!
La Niña Years—Our “Cool” Years—Are Now Warmer Than El Niño Years
Every year, Earth’s temperature changes a little. Sometimes it gets hotter, and sometimes cooler. Scientists track this closely to understand how our climate is changing. But it’s not just about clima...
eco-nana.com
July 9, 2025 at 3:46 PM
Think La Niña years are “cool”? Not anymore. Even our coolest years today are hotter than the hottest El Niño years of the past. Climate change is flipping the script — fast. A huge thank you to @zacklabe.com for his amazing graphic!
Reposted by Harkness Laboratory of Fisheries Research
Home is where the heat is (for brook trout that is)
Intrigued? Then check out this latest #ConPhys in Action piece, explaining the importance of local conditions to 🐟 temperature tolerance, and therefore for #Conservation planning.
Comments on Stewart et al (links in 🧵⬇️ )
Intrigued? Then check out this latest #ConPhys in Action piece, explaining the importance of local conditions to 🐟 temperature tolerance, and therefore for #Conservation planning.
Comments on Stewart et al (links in 🧵⬇️ )
April 9, 2025 at 12:03 PM
Home is where the heat is (for brook trout that is)
Intrigued? Then check out this latest #ConPhys in Action piece, explaining the importance of local conditions to 🐟 temperature tolerance, and therefore for #Conservation planning.
Comments on Stewart et al (links in 🧵⬇️ )
Intrigued? Then check out this latest #ConPhys in Action piece, explaining the importance of local conditions to 🐟 temperature tolerance, and therefore for #Conservation planning.
Comments on Stewart et al (links in 🧵⬇️ )
Reposted by Harkness Laboratory of Fisheries Research
A terrific afternoon for fish biology here at #SEBconference ❤️🐟 Great talks by @leeuwisrobin.bsky.social, Moa Metz, and @erinmcstewart.bsky.social about different ways that fish respond to climate warming!
July 8, 2025 at 3:49 PM
A terrific afternoon for fish biology here at #SEBconference ❤️🐟 Great talks by @leeuwisrobin.bsky.social, Moa Metz, and @erinmcstewart.bsky.social about different ways that fish respond to climate warming!
Reposted by Harkness Laboratory of Fisheries Research
Meta-analysis reveals that density-dependent growth, survival, and their trade-off vary systematically among habitats and taxa
buff.ly/DgfgJYQ
buff.ly/DgfgJYQ
May 6, 2025 at 1:55 PM
Meta-analysis reveals that density-dependent growth, survival, and their trade-off vary systematically among habitats and taxa
buff.ly/DgfgJYQ
buff.ly/DgfgJYQ
Reposted by Harkness Laboratory of Fisheries Research
April 26, 2025 at 12:00 PM
And often at high densities, so important food web participants
Did you know there are around 78 sucker species, and all but 2 are found exclusively in North America?
They are not "trash fish" but rather vitally important to freshwater ecosystems. Many have fascinating life histories. And, for anglers, they're great fun to pursue.
They are not "trash fish" but rather vitally important to freshwater ecosystems. Many have fascinating life histories. And, for anglers, they're great fun to pursue.
April 25, 2025 at 8:42 PM
And often at high densities, so important food web participants
Reposted by Harkness Laboratory of Fisheries Research
Second paper this week from #NearLab!
1/10 🚨🚨 New paper with @tjnear.bsky.social! Here, we revise the systematics of sturgeons using a phylogenetic approach! We confirm an Early Cretaceous origin for the sturgeon total clade and resurrect several genera for living species!
April 25, 2025 at 6:08 PM
Second paper this week from #NearLab!
March 29, 2025 at 12:48 AM
Reposted by Harkness Laboratory of Fisheries Research
Born on March 29, 125 years ago:
One of the most influential ecologists of the 20th century and the father of animal ecology, who turned natural history into a science: Charles Sutherland Elton (1900-1991).
A birthday thread… 🧵[1/8]
One of the most influential ecologists of the 20th century and the father of animal ecology, who turned natural history into a science: Charles Sutherland Elton (1900-1991).
A birthday thread… 🧵[1/8]
March 28, 2025 at 7:44 PM
Born on March 29, 125 years ago:
One of the most influential ecologists of the 20th century and the father of animal ecology, who turned natural history into a science: Charles Sutherland Elton (1900-1991).
A birthday thread… 🧵[1/8]
One of the most influential ecologists of the 20th century and the father of animal ecology, who turned natural history into a science: Charles Sutherland Elton (1900-1991).
A birthday thread… 🧵[1/8]
Reposted by Harkness Laboratory of Fisheries Research
Trophic Ecologists - new pkg alert - {trps} (pronounced ‘tropes’): Bayesian Trophic Position Models using 'Stan'. Estimates trophic position using equations from Post (2002), Vander Zanden & Vadeboncoeur (2002), & Heuvel et al. (2024).
benjaminhlina.github.io/trps/
#rstats #ecology #foodwebs
benjaminhlina.github.io/trps/
#rstats #ecology #foodwebs
Bayesian Trophic Position Models using stan
Bayesian trophic position models using stan by leveraging brms for stable isotope data. Trophic position models are derived by using equations from Post (2002) <doi:10.1890/0012-9658(2002)083[0703:USI...
benjaminhlina.github.io
March 22, 2025 at 7:45 PM
Trophic Ecologists - new pkg alert - {trps} (pronounced ‘tropes’): Bayesian Trophic Position Models using 'Stan'. Estimates trophic position using equations from Post (2002), Vander Zanden & Vadeboncoeur (2002), & Heuvel et al. (2024).
benjaminhlina.github.io/trps/
#rstats #ecology #foodwebs
benjaminhlina.github.io/trps/
#rstats #ecology #foodwebs
Reposted by Harkness Laboratory of Fisheries Research
How do habitat conditions, water flow, and #climatechange shape fish populations? A new CJFAS collection honours Dr. Boisclair’s research on these key topics ▶️ ow.ly/B4vl50UYTCf
📸 Eva Enders
📸 Eva Enders
March 20, 2025 at 3:24 PM
How do habitat conditions, water flow, and #climatechange shape fish populations? A new CJFAS collection honours Dr. Boisclair’s research on these key topics ▶️ ow.ly/B4vl50UYTCf
📸 Eva Enders
📸 Eva Enders
3-2 in overtime
Amazing game on ice;
Perfect ... off ice
Amazing game on ice;
Perfect ... off ice
February 21, 2025 at 5:19 AM
3-2 in overtime
Amazing game on ice;
Perfect ... off ice
Amazing game on ice;
Perfect ... off ice
Today at Harkness. Thanks Lucas....
February 14, 2025 at 4:04 PM
Today at Harkness. Thanks Lucas....
Thanks, Louise, for highlighting this. Agree.
Fieldwork brings authenticity - for the public, for ourselves, and for applications.
Undergrads & grads from our field station are always in demand.
Fieldwork brings authenticity - for the public, for ourselves, and for applications.
Undergrads & grads from our field station are always in demand.
If you did not read this paper, please do!!! Fieldwork needs to be recognized as a valuable and tangible aspects of science! Funding agency needs to start to value this more or....
Extinction of experience among ecologists sciencedirect.com/science/arti...
Extinction of experience among ecologists sciencedirect.com/science/arti...
Extinction of experience among ecologists
Fieldwork-based research and education in ecology are under multiple threats and are progressively declining. We call for greater attention to this on…
sciencedirect.com
February 8, 2025 at 2:28 AM
Thanks, Louise, for highlighting this. Agree.
Fieldwork brings authenticity - for the public, for ourselves, and for applications.
Undergrads & grads from our field station are always in demand.
Fieldwork brings authenticity - for the public, for ourselves, and for applications.
Undergrads & grads from our field station are always in demand.
Reposted by Harkness Laboratory of Fisheries Research
Shout out to @ucsandiego.bsky.social and @scrippsocean.bsky.social for keeping this going right now! keelingcurve.ucsd.edu
The Keeling Curve
The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.
keelingcurve.ucsd.edu
February 5, 2025 at 3:55 PM
Shout out to @ucsandiego.bsky.social and @scrippsocean.bsky.social for keeping this going right now! keelingcurve.ucsd.edu
Reposted by Harkness Laboratory of Fisheries Research
🙁 Removal of more than 250 endangered southern steelhead trout took place last Thursday at Topanga Creek in a rescue operation led by the California Department of Fish and Wildlife.
Hundreds of endangered fish rescued from bodies of water damaged by L.A. fires
Hundreds of endangered fish were removed last week from bodies of water left damaged by the Palisades Fire. A removal of more than 250 endangered southern steelhead trout took place last Thursday a…
buff.ly
January 29, 2025 at 11:39 PM
🙁 Removal of more than 250 endangered southern steelhead trout took place last Thursday at Topanga Creek in a rescue operation led by the California Department of Fish and Wildlife.