Fish… at a nuclear power plant? At a warm-water outflow in Lake Huron, thousands gather in one spot. April 22, 10:00am ET — join us live from “Fish City.” inspiredplanet.ca/hidden-below... #HiddenBelow #GreatLakes

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!

📡 Smart fisheries management! A solar-powered, acoustic monitoring system is providing near-real-time fish abundance data to optimize fishing for sustainability. 🐟 IJMS Hidden Gems 🎬 Watch now youtu.be/7EJhpwAqLJo Full study ➡️https://doi.org/10.1093/icesjms/fsad196 📷Mark Stone @uwsafs.bsky.social

Measuring travel time and knowing the speed of sound in water, the echosounder provides depth measurements along swaths, which we combine to create bathymetric maps, revealing underwater landscapes, submarine volcanoes, and ridges.

A pretty solid read if you want to learn about CRS’s and the difference between a foot and a survey foot.

The future is #catostomidae... firmly believe that if there's a sentinel species that can tell us about enironmental changes, this group of fishes is it. Widely distributed, rarely targeted by anglers (and therefore don't need to worry about fishing mortality), and, I mean, just look at that face

We're back in February for more conservation science! Join Dr. Mark Ridgway for the scoop on Algonquin Park lake fish. There's more going on beneath the waters than we thought!

📣 Just published in @conphysjournal.bsky.social with @jacobbowman.bsky.social, Chris Wilson, and Graham Raby How much does upper thermal tolerance vary among wild populations of brook trout? What drives this variation? 🌡️ 🧵1/5 doi.org/10.1093/conp...

This is why we turned on our multibeam sonar, which measures bathymetry at high resolution (~50 m/pixel) along the track of the ship, revealing spectacular highs and lows as we crossed the Southwest Indian Ridge a couple days ago.

Quote: "This situation shows why it's a bit of a risky proposition … to be relying on the industry to collect data that you're using to assess the fishery and then make decisions about how much quota the industry can take."

☃️🎼Do you hear what I hear?......at 500 kHz? 🎧 Here is to a safe and "sounding" holiday for you and yours!🎄❄️ Credit: slightly modified bathy model from our 2017 multibeam #sonar survey of @iisd.bsky.social ELA LK260. #ThrowbackThursday

I’m pleased to share the new version 5 of “The International Bathymetric Chart of the Arctic Ocean (IBCAO)”, which offers a resolution (100 × 100 m) four times as high as v4: rdcu.be/d4yx7 #OceanMapping #seafloor #geomorphology ⚒️🌊

Fish Distribution in Lacustrine and Riverine Biotopes of Bratsk Reservoir Based on the Results of Hydroacoustic Surveys. J. Ichthyol. 64, 1001–1015 (2024). doi.org/10.1134/S003...

☃️🎼Do you hear what I hear?......at 500 kHz? 🎧 Here is to a safe and "sounding" holiday for you and yours!🎄❄️ Credit: slightly modified bathy model from our 2017 multibeam #sonar survey of @iisd.bsky.social ELA LK260. #ThrowbackThursday

Alewife in the #GreatLakes are sensitive to seiche-driven upwelling events, forcing large schools to go tight to shore. Implications for potential fish entrainment at cooling-water intake facilities. Results from a fish diversion system monitoring study using #acoustics. 🐟 doi.org/10.1080/0275...

An example of upstream migrating Whitefish in a #GreatLakes tributary recorded using a #DIDSON multibeam imaging #sonar. The video provides a demo of our semi-automated processing method using Echoview software. We also support ARIS and FlexView sonar data. Methods paper; doi.org/10.1016/j.fi...

A Walk in the Snow Jennifer Walton 2016

Imaging #sonar systems such as #ARIS are ideal for observing fish behaviour and for assessing spawning sites. Shown are spawning fish within a #GreatLakes coastal wetland. We use Echoview software to automate background removal, target detection, and counting. Methods paper; doi.org/10.1002/nafm...

🔥 🔥 🔥 New Version🔥 🔥 🔥 #PINGMapper is now compatible with Lowrance fishfinders! github.com/CameronBodin... #CSHEL #sidescan #fishfinders4good #benthicmapping

In addition, new methods of reading data from sonar logs (recordings) result in up to a 1.3𝐱 𝐬𝐩𝐞𝐞𝐝𝐮𝐩! Head over to GitHub to try it out! Happy ping-ing!

Do you have piles of Zip or CD-R disks tucked away that hold old DGN, DT4, ECH or SMP survey data?💾💽 Want to know what your lake looked like “back in the day”? We can reprocess your vintage echogram data files using the latest software. We support legacy formats from Simrad, BioSonics and HTI. 💻🔊🐟

#ASA187 Lay Language Paper The Trump Rally Shooting: Listening to an Assassination Attempt acoustics.org/the-tr...

Calling #Acousticians! Submit your abstract for the joint ASA/ICA Meeting! Dive into special sessions, from Acoustic Ecology to Animal Vocal Communication & more. Showcase your work in New Orleans, Louisiana! Abstracts due Jan 6—don’t miss out! Details at acousticalsociety.or...

Yesterday was our final day of tagging spawning lake whitefish on Lake Simcoe. We will be tracking the movements of these fish around the lake.

Are you a fish telemetry practitioner? The 7th International Conference on Fish Telemetry will take place June 8-13, 2025 in Traverse City, Michigan, USA. The conference website is now live for abstract submission and details on the venue. Help spread the word. event.fourwaves.com/7thicft/pages

Wanna learn more about what we do? Have a look at some of the #hydroacoustic services we provide. Our promo doc includes clickable links to videos, echograms, case studies and examples. Thx for check'n it out! 📌 www.milnetechnologies.ca/MilneTech_Do...

Exactly. Leave the garbage site. This process has been too drawn out for science folk. Thank you bsky

This was a cool study and fun paper to write. We followed acoustically tagged lake around with a multibeam sonar to study their behaviour. Observed attacks on prey fish schools and interactions with other lake trout.

It's #sturgeonsaturday! Last week, I talked about seeing sturgeon with sound. But how do we know the species (green or white sturgeon)? We use video! We drop cameras in select areas and watch the fish swim by. Last year we saw 98 fish. Of ones we could identify all were green #sturgeon. 🧪🌎

I wonder if that would work with recreational grade side-scan... doi.org/10.1002/fsh....

#ThrowbackThursday; this one from 2007. Tracking tagged (and untagged) Lake Trout using multibeam #sonar and 200 kHz #acoustic tags. 3D model from "Tag01" in TAFS paper by @airydunlop.bsky.social , @harknesslab.bsky.social , @echoview.bsky.social , et al. doi.org/10.1577/T08-... #hydroacoustics

Nov. gales can lift and move mats of decaying benthic #Cladophora in Lk Ontario. These algae events are a major safety concern at industrial cooling-water intake facilities where there is a risk of fouling. We are using multibeam #sonar to assess the effectiveness of Bubble Curtains as a deterrent.

Come here little fishy

Great to see many new faces joining #ecotox Bluesky - feel free to introduce yourself! I’m a professor at Queen’s U in Canada & director of the QE3 Lab qe3research.ca

Black Bass 2025. storymaps.com/stories/baf0...

The Great Lakes Ranked By Size -- www.worldatlas.com/lakes/the-gr... <-- shared article -- #GIS #spatial #mapping #GreatLakes #hydrology #freshwater #lake #Canada #USA #LakeSuperior #LakeHuron #LakeMichigan #LakeErie #LakeOntario #waterresources #navigation #geography #metrics

DYK the fish can hear you coming? We tested the effect of outboard engine noise on the distn of fish targets within the #acoustic beam of a split-beam echosounder. Small-boat #hydroacoustic surveys of @iisd.bsky.social ELA LK224 were run with either a gas or electric motor. youtu.be/8Y_Ioc_8Fys

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.

This is our first bsky message! Good to be on this site

Having a dabble mosaicking VHF down-scan imagery along some rough ground previously mapped with the Humminbird sidescan, and processed using PINGMapper. Doing so provides a fantastic transect overview, and clearly illustrates the ground and the value that kelp cover provides for detected fish.

Side scan sonar vs 360 scanning sonar. Four different lines of side scan sonar showing the same unidentified object on the seafloor vs an image from a Mesotech 360 scanning sonar showing the object as a section of metal catwalk with railing. #sonar #geophysical #archaeology

How do we count sturgeon underwater? We use sound! Sturgeon are so big and usually close to the bottom that we can use habitat mapping sonar to count them. Each blob in the image on the right is a sturgeon. #sturgeonsaturday 🧪

All kinds of sounds are happening in the oceans. There are whale songs or echolocation. Cephalopods can make and hear sounds, too, even without ears, and then there’s human-made noise, like the giant shipping containers that crisscross the globe.

The ocean's volume is 1,335x10^6 km^3, and its surface area is 360x10^6 km^2. Its average depth exceeds 3 km. To follow up on my post from earlier and a conversation I had earlier this week... The scale of how much water is in the ocean is just hard to process, even for us working on it. 🌊

Imaging multibeam #sonar systems, such as #ARIS or #Flexview, are ideal for detecting and identifying species-at-risk in riverine and shallow water systems. Shown is a #Sturgeon detection from a fish passage survey of the Fraser R. Automated target detection using Echoview. #Hydroacoustics

Wanna detect tagged fish, see untagged fish and map bottom habitat at the same time? You can! Ideal tool for identifying & mapping spawning areas or to assess #Sturgeon in large rivers. Learn more about our multibeam mapping & fish tag detection sonar system. www.milnetechnologies.ca/sonartags.htm

New paper on an underappreciated but utterly fascinating fish: the Freshwater Drum Did you know they will swim hundreds of km/month?! link.springer.com/article/10.1...

Nov. gales can lift and move mats of decaying benthic #Cladophora in Lk Ontario. These algae events are a major safety concern at industrial cooling-water intake facilities where there is a risk of fouling. We are using multibeam #sonar to assess the effectiveness of Bubble Curtains as a deterrent.

After decades, lake trout restored to sustainable levels in Lake Superior #GreatLakes www.wmuk.org/2024-11-20/a...

In 1912, Reginald Fessenden demonstrated the first successful sonar. #Poetry #Science #History #Electrodynamics #Sonar #Fessenden (sharpgiving.com/thebookofsci...)