Ancient hunter-gatherers may have populated Norway's high-altitude lakes with trout over 7,000 years ago

High-altitude lakes in Scandinavia, often teeming with diverse fish populations like trout and salmon, present a unique ecological puzzle. These lakes, formed over 10,000 years ago following the last glacial period, are situated in remote, challenging terrains. The presence of fish in these seemingly inaccessible waters has long been an enigma for scientists.

While human intervention is often a factor in fish distribution, particularly with species migrating from oceans, the specific origins of fish in these ancient, high-altitude Scandinavian lakes remain unclear. Researchers are now turning their attention to the region's earliest human inhabitants – hunter-gatherer communities who populated Scandinavia as the ice receded.

These early populations, who lived in the region more than 7,000 years ago, may hold the key to understanding how these lakes became inhabited. The investigation into their potential role in introducing and sustaining fish populations in these pristine, high-altitude environments is ongoing, offering a fascinating glimpse into the interplay between ancient human activity and natural ecosystems.