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!

Hidden Below: The Great Lakes@hiddenbelow.bsky.social · 11mo ago

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...

📡 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.

Jami@justjami.bsky.social · 2y ago

Get ready, datums are changing! Great storymap showing how the effect of the changes! storymaps.arcgis.com/stories/a8e9... #GISChat

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

Matthew L. Miller@matthewlmiller.bsky.social · 2y ago

There's a sucker (myth) born every minute. These are not trash fish. Suckers are native fishes found across N. America. They are essential parts of the ecosystem. They're cool fishes to pursue. Photo by Joel Sartore, of a largescale sucker I caught for him to photograph (and release).

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...

Local conditions drive interpopulation variation in field-based critical thermal maximum of brook trout

Abstract. Individual- and population-level responses to thermal change will be pivotal for species’ resilience and adaptive responses to climate change. Th

doi.org

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."

François-Nicolas Robinne@fnrobinne.bsky.social · 2y ago

Industry withholding #data on one of #Canada 's largest #fisheries, advocates say www.cbc.ca/news/canada/...

☃️🎼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 ⚒️🌊

The International Bathymetric Chart of the Arctic Ocean Version 5.0

Scientific Data - The International Bathymetric Chart of the Arctic Ocean Version 5.0

rdcu.be

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...

Fish Distribution in Lacustrine and Riverine Biotopes of Bratsk Reservoir Based on the Results of Hydroacoustic Surveys - Journal of Ichthyology

Abstract Fish distribution in different areas of Bratsk Reservoir has been studied using hydroacoustic equipment. The average abundance of fish decreases (r = –0.70; p < 0.05; R2 = 0.49) from the near...

doi.org

☃️🎼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

GitHub - CameronBodine/PINGMapper: Open-source interface for processing recreation-grade side scan sonar datasets and reproducibly mapping benthic habitat

Open-source interface for processing recreation-grade side scan sonar datasets and reproducibly mapping benthic habitat - CameronBodine/PINGMapper

github.com

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...

The Trump Rally Shooting: Listening to an Assassination Attempt

When rifle fire interrupted Donald J. Trump’s campaign rally, more than two dozen user-generated recordings allowed rapid audio forensic interpretation.

acoustics.org

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

International Conference on Fish Telemetry (7th ICFT)

Fourwaves - International Conference on Fish Telemetry (7th ICFT)

event.fourwaves.com

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.

Scott Milne (Milne Technologies)@milnetechnologies.ca · 2y ago

#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

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. 🧪🌎

Peter N. Dudley@conservation.bio · 2y ago

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 🧪

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

AFS Publications

Side-scan sonar (SSS) is a powerful tool that can be used to address many key questions in fisheries science. In principle, SSS uses dual transducers to transmit a narrow-beam, wide-angle acoustic si...

doi.org

Methods in Ecology and Evolution@methodsinecoevol.bsky.social · 2y ago

📖Published📖 Our new Research Article presents a method and open-source software called ‘FishScale’, to estimate benthic fish lengths, numeric abundance and biomass density in underwater environments assessed with down-looking monocular images 🐠 🌎 🧪 Read more here 👇 https://buff.ly/41aBylX