7000-year-old hunter-gatherers found to have stocked mountain lakes with fish as a food source and trapped them with wooden traps

Analysis of ancient wooden fish traps from Tesse Lake in southern Norway dates the oldest to around 4950 BCE.

Researchers say hunter-gatherers likely introduced brown trout into the high-altitude lake and managed the fishery over a long period.

The find shows prehistoric hunter-gatherers were not just foragers, but also practiced fish translocation and sustained resource management.

It updates understanding of food security, high-mountain lake use, and mobile lifeways in prehistoric northern Europe.