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
So cool. Like flying over Everest! Btw the 333 is very pretty.
All that bottom tracking must be helpful for keeping you awake! Good luck with the rest of the surveys.
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
The difference between satellite-based bathymetry (left, Smith & Sandwell, 1997) and ship-acquired multibeam bathymetry of the Southeast Indian Ridge (Loubrieu et al.)
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
A poster for our pub talk Islands of Water in a Sea of Land: Newly Discovered Species Diversity of Fish in Algonquin Park. Feb 11, 7:30 pm, the Publican. Dr. Mark Ridgway is pictured holding up a 2 foot fish with blue lakewater stretching out in the background
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...
imaging the axis of the Southwest Indian Ridge with the multibeam sonar
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 ⚒️🌊
Picture of a boat on a lake moving large floating letters that spell "Happy".
Although it was a lot of work to push them into place, I think the trout are quite happy with their new benthic alpha-habitat structures. Unless you think we need funding to replace it with a much trendier font? Maybe a nice Romie or Garamond serif?
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
Would be fun to try. Altho we developed tags that can be activated, detected and decoded by sonar, the ⬇️ body size, ⬆️ predation pressure, and ⬆️ mortality of Alewife would make reliable detection challenging. But @glatos-fish.bsky.social have trkd Cisco, Mooneye, and Bloater. doi.org/10.1139/cjfa...
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!
Picture showing a very old Toshiba Laptop running software for a vintage Simrad EY500 scientific echosounder. Also see on the wooden boat shelf is an old Kongsberg Mesotech SM2000 multibeam computer and a monitor showing a colourful multibeam swath echogram. To the right of the image is a Panasonic CF-30 Toughbook for running survey vessel navigation software. All of this tech was installed on the Harkness Lab vessel "Henley Hauler".
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
Photo of 3 printed colour pages splayed out on dock deck boards. The pages shown are from the Milne Technologies promotional flyer that can be downloaded from https://www.milnetechnologies.ca/MilneTech_Docs/MilneTech_eFlyer.pdf.
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...
