Hunter-gatherers introduced fish to a mountain lake 7000 years ago
Archaeologists discovered ancient wooden fish traps at Lake Tesse in Norway, proving that hunter-gatherers transported brown trout to this isolated mountain lake at least 7000 years ago. This finding represents the oldest documented example of human-mediated fish translocation in the world. The evidence suggests that early people managed their environment to secure a reliable food supply centuries before farming arrived in Scandinavia, challenging previous assumptions about natural fish migration.
This is the oldest documented example of human-mediated translocation of fish in the world.
- m463
> That is the only possible explanation for how fish could have populated isolated mountain lakes
isn't that a common question?
"How do fish appear in landlocked lakes/ponds/etc"?
After digging a pond and letting it fill with rainwater/groundwater, fish appear. I don't think its because people carried them there.
(don't really know the common answer though)
- rurp
Somewhat related, after desert rains you can often see fairy shrimp (think sea monkeys you might have had as a kid) swimming around in the isolated pools that form. I looked this up after wondering how the heck these water creatures could survive dozens of miles from the nearest permanent water source.
The answer is that their eggs are extremely lightweight, so much so that wind can carry them long distances. Their entire life cycle is extremely accelerated. Once water soaks the eggs the critters can hatch, develop, and lay new eggs in a matter of days. The newly laid eggs have a tiny chance of reaching a new seasonal pool area.
- BeetleB
Related: Fish were introduced to Crater Lake in the US a little over a hundred years ago, and is generally considered to have been the wrong thing to do.
If you go there, you're free to fish to your heart's content.
- moebrowne
- fractallyte
An alternative vector: "cloud seeding" (https://www.theguardian.com/science/2004/sep/09/science.rese...)
Charles Fort collected numerous data for his famous "The Book of the Damned" https://en.wikipedia.org/wiki/The_Book_of_the_Damned
- EvanAnderson
"Someone brought the black bass to this lake from far away, changing the biological distribution of the lake."
- onlypassingthru
I wouldn't be so sure. Were there ever any ducks?
https://www.smithsonianmag.com/smart-news/special-delivery-d...
- yrjrjjrjjtjjr
One possibility for fish eggs getting to lakes I want to propose is extreme weather. Winds can move sand from side of earth to the other. Flooding. Tornadoes.