Wednesday, October 9, 2024

"Non-native pink salmon have swarmed Norway’s rivers..."

 From Hakai Magazine, October 8:

Where the Rivers Run Pink
Non-native pink salmon have swarmed Norway’s rivers, prompting a relentless—and questionable—fight to beat back the invaders.

The Grense Jakobselv River flows from northwestern Russia to the Barents Sea. For 35 of its 45 kilometers, the river also serves as the border between Russia and Norway. This means fishing the Grense Jakobselv can be fraught. Where the river narrows, a Norwegian angler might accidentally tangle a hook in the heather on the Russian side. Crossing the border to untangle the line is forbidden, but so is depositing a foreign object on Russian soil. Interacting with a Russian soldier guarding the border is also banned. This makes untangling a line nearly impossible. An angler who steps into Russia is likely to be caught on security cameras and fined €1,000. The cameras, hidden in the woodland, catch other drifters, too—moose, eagles, foxes—but they are free to come and go. So are the fish that frequent these waters.

To salmonids swimming from the ocean, the Grense Jakobselv is not a border but an invitation. With clean, free-flowing water, plenty of fly larvae to eat, and loose gravel for nesting, laying eggs, and broadcasting sperm, the river is classic salmonid habitat.

Traditionally, Norwegians have fished the Grense Jakobselv for Atlantic salmon, an iconic species in northern Europe. Over 10,000 years ago, this piscine Pied Piper coaxed some of Europe’s earliest inhabitants north from river to river, promising protein and power—irresistible lures as the climate changed and ecological boundaries shifted. Most populations of Atlantic salmon have nearly vanished across the fish’s southern range, from Spain to the southern Baltic states. They retain a hold in the north, especially here in Finnmark, Norway’s most northeasterly county, through which the Grense Jakobselv flows....

....MUCH MORE

Previously, July 8, 2021 - "Alarm bells ringing for Atlantic salmon. An invasive species from the Pacific appears to take its place"
Don't be deliberately introducing invasive species....

Possibly also of interest:

And in other invasive species news: 

Arctic King Crabs Have Conquered The Barents Sea; May Head For the UK Next 

Those King crabs will have to deal with the English thug crabs and their knife-play.