Centuries before farming reached Scandinavia, hunter-gatherers introduced trout to Norway’s mountain lakes, creating fisheries that still exist today

Long before fields were ploughed or livestock grazed across Scandinavia, people living in what is now southern Norway were already reshaping the landscape in a way that has endured for thousands of years. Archaeologists have uncovered 7,000-year-old wooden fish traps at Lake Tesse, high in the Norwegian mountains, providing the clearest evidence yet that Mesolithic hunter-fisher-gatherers deliberately transported brown trout into lakes that had never naturally contained fish.

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