Harkness Laboratory of Fisheries Research

Small shorebird with brown and white feathers standing in shallow Arctic water surrounded by seaweed and ripples.

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

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!

Two new species of Micropterus (Centrarchidae) endemic to Atlantic Slope river drainages in Georgia, South Carolina and North Carolina, U.S.A. | Zootaxa

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...

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)...

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

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...

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!

LMB

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 🧵⬇️ )

A scientist presents her take-away slide on a large dark stage. It reads: Take-away • Zebrafish can evolve improved growth at warmer temperatures • Thermal performance curves can undergo a left or right shift • Ectothermic vertebrates may adapt to global warming by enhancing performance • Role of selection in shaping thermal resilence

A scientist presents her title slide on a large stage, it features a beautiful picture of a brook trout.

A scientist presents the methods of her research on a large screen

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!

Line graph with error showing relationship between growth and survival across birds, fish, herptiles, invertebrates, and mammals.

Meta-analysis reveals that density-dependent growth, survival, and their trade-off vary systematically among habitats and taxa
buff.ly/DgfgJYQ

A webcam shot of Lake of Two Rivers in Algonquin Park.

Current #IceOut conditions in Algonquin Park. Image courtesy of The Friends of Algonquin Park.

And often at high densities, so important food web participants

Second paper this week from #NearLab!

We're not attending ICFT. Bigger issues at hand. We've put a lot of effort over the years in fine-scale positioning arrays, so we were looking forward to attending.
Oh well....

Later in the 1930s, Elton visited the station on Lk Opeongo.
It likely reflected correspondence over the years between him and Dymond.

Later in the 1930s, Charles Elton visited the park & Harkness... greeted by folks from Harkness at the train station in Pembroke, Ontario.
Elton & Harkness Lab...now that's something.
7/7

Elton's book, Dymond & MacDougall were pivotal in bringing a modern ecosystem view to Algonquin Park.
X/4

Frank MacDougall, superintendent of Algonquin Park at the time, worked closely with Dymond to bring a science element to new park directions. Elton's concepts of food chains, pyramids, and productivity were promoted by Dymond.

X/3

First review of Elton's Animal Ecology (I believe) was by JR Dymond in Canadian Field Naturalist. A glowing review by Dymond. Dymond was curator of ichthyology at Royal Ontario Museum, U of Toronto. He was also working closely with new leadership managing Algonquin Park...
2/x

Elton's day.
@ecoinvasions.bsky.social thanks for the reminder

Interesting Harkness connection...

1/x

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]

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...

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

Image of water stream with trees. Photo credit Photo credit: Eva Enders. CJFAS logo with text overlay: An understanding of the processes regulating fish production.

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

3-2 in overtime
Amazing game on ice;
Perfect ... off ice

Feb 14 2025 at Harkness Laboratory of Fisheries Research

Today at Harkness. Thanks Lucas....

Field station here. We've followed you for years. Your climate change summaries are truly an evidence-based contribution for everyone to see. Hang in there & we're hoping for the best for you. You mattered in this medium...

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.

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.

Shout out to @ucsandiego.bsky.social and @scrippsocean.bsky.social for keeping this going right now! keelingcurve.ucsd.edu

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…

🙁 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.

Jean, your paintings are amazing. From databases to brushes.
Well done.
(Love the cone flower from '23)