Jason Barnucz

Officials introduce voracious fish to fend off invasive species before it spreads to major lake: 'Ecologically important' Officials speculate that someone emptied an aquarium with goldfish into the pond.

www.yahoo.com/news/article...

Florida deploys robot rabbits to control invasive Burmese python population Burmese pythons pose a huge threat to native species in the Florida Everglades. Officials have used creative methods to manage the population of invasive snakes.

www.cbsnews.com/news/burmese...

Title, authors’ names, abstract, and keywords from a paper about defining “good evidence” for environmental decision making based on insights from Canadian professionals working at the science-policy interface

Understanding how policymakers define & select evidence in environmental decisions is crucially important. Based on interviews with 84 Canadian professionals working at science-policy interfaces, Nyboer et al. set out a new definition of “good evidence” @sjcfishy.bsky.social‬ doi.org/10.1016/j.en...

Two black mussels between little gravel, slightly open so that water can be filtered

Half of a black mussel (around 12 cm long in total) can be seen above the sediment

Three mussels in finer sediment, buried deeper but the two openings / siphons can be seen clearly

Have you ever wondered how the freshwater pearl mussel (M. margaritifera) lives in our rivers and feeds? I took some photos at our mussel breeding station today. The mussel is buried in the sediment by about a third or more and holds on with its muscular foot. It has two filter openings... 1/2

Fig from Porto-Hannes et al. 2025 showing a mudpuppy with its bright red exposed gills. There are little spots on the gills, each of which is a little sluglike mussel glochidium only a couple mm in size

Freshwater mussels mostly use fish as a host to move upstream. The salamander mussel is unique in latching on to aquatic salamanders! Its larvae encyst in the gills of mudpuppies, possibly staying with their hosts over the winter! (204)

Some of the snow totals recorded from the epic lake effect snow event to end off November & begin December. * denotes unofficial totals. It gets very difficult to measure amounts when you get this much! The squalls have left #Muskoka region & have been impacting #London & vicinity. #onstorm

Come for the #WinterForecast, stay for the #Movember donation: ca.movember.com/mospace/766332

Centre for Ecosystem Management

🌿 Our ecosystems are changing - and so must our strategies. At the Centre for Ecosystem Management, we bring together diverse voices, skills, and science-driven solutions to address pressing environmental challenges in the Great Lakes region and beyond. Intrigued? Learn more @ ecosystemscience.ca 🌍

A fish scientist guides a large Alligator Gar back into the water after collecting data on the fish.

“Don’t worry friend, #GarWeek will be here soon”

~Me to this Alligator Gar, probably.

Sweet drive! 😎 🐟 👊🏻

Ever wonder what your tagged fish are up to between receiver fixes? See them in real-time! Who are they hangin' with? What are they snackin' on? 3D activity? See the big picture using integrated #sonar and acoustic biotelemetry methods. For more information www.milnetechnologies.ca/sonartags.htm.

Nice to see you all again! Happy to replace my tweets with skeets?..bleets? idk...🤷‍♂️
I’m Scott Milne and I bleet about #hydroacoustics, sonar imaging, acoustic biotelemetry, and fish habitat mapping. I hope you enjoy this #ARIS multibeam echogram of a baitfish school being attacked by Rainbow Trout.

OTD 1859 #CharlesDarwin published Origin of Species. It's worth reflecting that he recognized the disruptive power of species invasions at a time when very few other scientists did. In Origin, he proposed hypotheses that today's ecologists are still exploring... 1/n🧵 #bioinvasions #invasivespecies

Darwin remarked on the attachment of freshwater bivalves to the feet/feathers of waterfowl as a potential dispersal mechanism. In particular, reports of sphaeriid clams attached to the toes of salamanders are now quite common.

www.researchgate.net/publication/...

21 Species Delisted from the Endangered Species Act due to Extinction | U.S. Fish & Wildlife Service FALLS CHURCH, Va. —  The U.S. Fish and Wildlife Service is delisting 21 species from the Endangered Species Act due to extinction. Based on rigorous reviews of the best available science for each o...

Sad news for a Friday. Unfortunately, Unlike some terrestrial animals, I doubt we get grainy pictures of the Scioto Madtom or San Marcos Gambusia to keep the hope alive.
www.fws.gov/press-releas...

A gar (fish) is seen on a black background with the word “gar” above the fish and “week” below the fish. It’s a promotion for “GarWeek” a celebration of these unique, ancient fishes, freshwater biodiversity, conservation, and unnecessary fish puns.

#GarWeek arrives December 16!!!
@garlab.bsky.social

The Ricciardi Lab account on Bluesky is up and running. The migration from X/Twitter is completed.

it’s #sturgeonsaturday!! 🧪🌎👩🏻‍🔬🐠

did you know that sturgeon don’t have scales? Instead they are covered in rows of bony plates called scutes! Scutes are as beautiful as they are protective & can be quite sharp in some life stages & species

Check out the rows of scutes that look like white diamonds 👇🏼

Check out these freshwater musselheads 🦪, snaily folk 🐚🐌, and groups! Let me know if you would like to be added.
go.bsky.app/NjUGvWf

It’s Maximus from the movie Gladiator, but with a gar’s head, with the famous movie quote gar-punned into: “Gar you not entertained?” This is what happens when Solomon David is on Bluesky.

Watched Gladiator II, so I’m giving y’all this one:

After last night's downpour across the #GTA, here's where the bulk of the rain is expected today & tomorrow. With the evening commute now dark, throw in some rain & it always gets trickier. Like in #Ottawa this evening. Hope you "love a rainy night" in #Montreal!

Me in my echo chamber.

Fighting to keep grass carp out of the Great Lakes | The Narwhal Canada and the U.S. are working to stop a massive invasive fish — grass carp — from invading the Great Lakes

In 2012, fertile grass carp were identified near the mouth of the Sandusky River on Lake Erie; in 2015, grass carp eggs were found in the river, indicating that some breeding populations had established themselves in parts of the Great Lakes.
thenarwhal.ca/ontario-gras...

For the love of suckers: scientific benefits of engaging volunteers to monitor migrations and advocate for native non-game fishes - Environmental Biology of Fishes Suckers (Catostomidae) are the most abundant migratory fishes in the Laurentian Great Lakes region, but they are understudied and underappreciated given their important roles in ecosystems. To overcom...

New Paper: This program, run by Dr. Karen Murchie, who is Director of Freshwater Research at Shedd Aquarium, continues to be a model for volunteer citizen scientists. link.springer.com/article/10.1...

Moments ago, Nova Scotia just cut down this tree to send to #Boston as a thank you for their help following the #Halifax explosion #ShareYourWeather @themurphologist.bsky.social @weathernetwork.bsky.social

The Rough Fish Revolution - bioGraphic Fisheries scientists are only now coming to understand the important roles native “rough fish” play in freshwater ecosystems across North America—even as these long-maligned species are increasingly a...

Here’s a story I’ve been working on for a couple years, about the most important conservation issue you’ve never heard of.
www.biographic.com/the-rough-fi...

Fighting to keep grass carp out of the Great Lakes | The Narwhal Canada and the U.S. are working to stop a massive invasive fish — grass carp — from invading the Great Lakes

🌊 #Invasive species are a pressing concern in the #GreatLakes region; the Grass carp being one. Prolific eaters, they're capable of devastating wetland environments and upending the commercial #fishing industry. Stay up to speed on what's being done to keep them out: thenarwhal.ca/ontario-gras... 🎣

a close up of a spongebob pineapple with a hole in it . ALT: a close up of a spongebob pineapple with a hole in it .

Private time is not so private for your fishy friends. 😂

Following the current Bsky trend:
Advertise your account with just one image. ⬇️

When not conducting research on endangered freshwater fish, I spend lots of time with family chasing our other fishy friends.

Kayak fishing is our new, and preferred, angling method.

It’s who I am.

🎣 🐟 🛶 ❤️

Home - FishAge: Known-Age Fish Image Database Building on the vision of Dr. Mark Pegg and Dave Buckmeier, our team came together in the summer of 2021 to brainstorm a means to determine the availability

If you age fish with calcified fish structures, check out our new website that displays images of known-age fish. Learn how to age fish and touch up on your skills! www.fishage.org
🐟 #fisheries
#fishsky
#otoliths