Harkness Laboratory

Harkness Laboratory of Fisheries Research is an aquatic ecology research station on Lake Opeongo.
@[email protected]

[Harkness Laboratory @OpeongoTweets]

Swan Lake anyone?

[Harkness Laboratory @OpeongoTweets]

Follow the butterfly...

[ICFT 2025 @2025ICFT]

Official save the date card. Thanks to everyone who has spread the word so far 🐟

[Ecological Monographs @ESAMonographs]

New & #OpenAccess in @ESAMonographs: What exactly does eutrophication mean? A review identifies dozens of interpretations & highlights the need for a consensus definition

https://t.co/adBRXxTAi2

With #OpenData & code at @figshare

[Jacob Bowman @BowmanJacob_]

White suckers gathered to spawn in a small Algonquin Park stream

[Erin Stewart @erinmcstewart]

📣 Just published in Environmental Biology of Fishes!

Brook trout embryos incubate from fall to spring - can they survive changing winter conditions? ❄️💧☀️

With @EmilyRLechner , Vince Frasca, Chris Wilson, and @graham_raby

🧵1/5

https://t.co/C25DI7h2qZ

[Harkness Laboratory @OpeongoTweets]

Benthivores are a common element of fish assemblages across Canada. Limnology, sedimentation & habitat use.

The wash zone and habitat use among three benthic fish species in stratified lakes - Ridgway - Ecology of Freshwater Fish - Wiley Online Library https://t.co/8sL5dk2mOb

[Tom Thomson @TTLastSpring]

1915 Wild Cherries, Spring #tt1915

[Harkness Laboratory @OpeongoTweets]

..... and they go for your head too. Tough guys.

[Hidden Below: The Great Lakes @HiddenBelowFilm]

#smallmouth bass dads are the best! #smallies will go for weeks without food to guard their nests - keeping their eggs clear of silt and chasing away any predators looking for bass baby snacks.

#freshwaterfish #greatlake #georgianbayforever #smallmouthbass

[Harkness Laboratory @OpeongoTweets]

@EFD_Toronto Exciting ... and frustrating. A slow start.
Still.....
The whole system (3 lakes interconnected; 185 receivers) removed, downloaded and re-deployed in 8 working days.

[Harkness Laboratory @OpeongoTweets]

@graham_raby Big yellow taxi... only way to move fish!

[Tom Thomson @TTLastSpring]

1915 Algonquin Park, September #tt1915 @mcacgallery

[Harkness Laboratory @OpeongoTweets]

@donaldorth Why that is Marlin Perkins. He stayed in the truck while Jim went out and wrestled large predators to the ground...

We're both showing our age

[Lauren Stoczynski, PhD @Eco_Stosh]

MERRY #FISHMAS!! On this 25th day, I want to talk about the Fieryblack Shiner (Cyprinella pyrrhomelas)! These fish inhabit rocky, swift moving waters and pools in small and medium sized streams/rivers of NC and SC

[Harkness Laboratory @OpeongoTweets]

Somehow, this is strangely reassuring

[Ryan Haecker @RyanHaecker]

"The earth is degenerating today. Bribery and corruption abound. Children no longer obey their parents, every man wants to write a book, and it is evident that the end of the world is fast approaching."
- Assyrian tablet, c. 2800 BC

[Harkness Laboratory @OpeongoTweets]

We are proud that this work is part of the David Noakes special issue of Environmental Biology of Fishes. David was a wonderful colleague, mentor and very wise. And a great dry sense of humor...

[Harkness Laboratory @OpeongoTweets]

Thermal niche and habitat use models for lake trout and brook trout co-existing in large lakes of Algonquin Park. Our latest...
They should match, right?
If not, how far off is habitat use from thermal niche?
#Salvelinus #charr #fishecology

https://t.co/IwinpwAGOT

[Harkness Laboratory @OpeongoTweets]

@tonyrwalker1 @[email protected]

[Harkness Laboratory @OpeongoTweets]

Looking south from an island in one of our study lakes with an acoustic tracking network. Beneath those waves fish have always been moving - we'll find out the details of winter movement from the pending May/June '23 download.

[Tom Thomson @TTLastSpring]

1912 Northern Lake #tt1912 painted at Molly's Island on Smoke Lake

[RAEON @RAEON_]

Last week we partnered with @uofg @mccannlab to test a glider in Algonquin Park. Team Harkness @OpeongoTweets hosted and doubled as film crew for deployment. As you can tell from the audio, no fun was had during this unique mission...

[Harkness Laboratory @OpeongoTweets]

A database of lake characteristics from our decade+ lake survey of Algonquin Park. Dataset at Dryad.
Chemical/environmental parameters
Hypsographic data
etc
https://t.co/A9k6UwvPNC