Harkness Laboratory of Fisheries Research

@harknesslab.bsky.social

Harkness Laboratory of Fisheries Research. An Ontario Ministry of Natural Resources field station on Lake Opeongo, Algonquin Park. Beginning in May 1936. Posting: Mark Ridgway Harkness.ca

🧵 1/11New paper alert! One of two out today from #NearLab Ever heard of the Holiday Darter? These beautiful freshwater fish are hiding a big biodiversity secret in the rivers of Georgia, Alabama, & Tennessee and new genomic data is revealing it. A thread 👇

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🧵1/11 New paper alert! One of 2 out today from #NearLab. Tunas are basically the superheroes of the ocean — warm-blooded, massive, and blazing fast. But HOW did they get that way? A new study just cracked open 50+ million years of evolutionary history. Let's dive in. 🐟⬇️

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This is my favorite climate change chart. Japanese monks, aristocrats, and emperors kept meticulous records of cherry blossom festivals for 1,200 years and accidentally built the world's longest climate dataset.

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For Day 9 of #25DaysOfFishmas, we're heading back to Australia to meet perhaps the most evolutionarily isolated species on our list. This is Lepidogalaxias salamandroides, the salamanderfish, which is not only the only member of its family, nor order, but is the only member of its *superorder*!

Lepidogalaxias sitting on a leaf in a tanks. It is sausage shaped, with a large tail fin and a funny litlte bullet-shaped head. Credit: Gerald Allen via Western Australian Museum

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...

1/ Who published the first freshwater food web? American ecologist Victor Shelford may have done so (see below) in his classic 1913 monograph "Animal communities in temperate America as illustrated in the Chicago region", a book that inspired Charles Elton (who cited it in Animal Ecology)...

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Think La Niña years are “cool”? Not anymore. Even our coolest years today are hotter than the hottest El Niño years of the past. Climate change is flipping the script — fast. A huge thank you to @zacklabe.com for his amazing graphic!

La Niña Years—Our “Cool” Years—Are Now Warmer Than El Niño Years

Every year, Earth’s temperature changes a little. Sometimes it gets hotter, and sometimes cooler. Scientists track this closely to understand how our climate is changing. But it’s not just about clima...

eco-nana.com