{"id":5138,"date":"2026-08-18T12:04:04","date_gmt":"2026-08-18T12:04:04","guid":{"rendered":"https:\/\/improveaquaticlife.se\/2026\/08\/18\/video-from-the-stockholm-river-new-hope-for-salmon-and-sea-lampreys\/"},"modified":"2026-08-18T12:49:18","modified_gmt":"2026-08-18T12:49:18","slug":"video-from-the-stockholm-river-new-hope-for-salmon-and-sea-lampreys","status":"publish","type":"post","link":"https:\/\/improveaquaticlife.se\/en\/2026\/08\/18\/video-from-the-stockholm-river-new-hope-for-salmon-and-sea-lampreys\/","title":{"rendered":"Video from the Stockholm River \u2013 New Hope for Salmon and Sea Lampreys"},"content":{"rendered":"

When the waterway was opened at Okome Mill in Stock\u00e5n, fish were able to move freely upstream through the water system. Spawning salmon have been observed\u2014and the restoration could have a major impact on the critically endangered sea lamprey, eel, and other species. Watch our video clip from our visit to the restored area. <\/strong><\/p>\n

The Stock\u00e5n is a tributary of the H\u00f6gvads\u00e5n and the River \u00c4tran. For some time now, extensive work has been underway to restore the river\u2019s aquatic environments. At Okome Mill, a dam has been removed, and the water can now flow freely. <\/p>\n

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Elisabeth Thysell, a biologist at the Halland County Administrative Board, sees significant environmental benefits.
Photo: Nicka Hellenberg<\/p><\/div>\n

\u201cThe open waterway allows several fish species to migrate upstream into the system. Among the species that benefit are salmon, eel, and the critically endangered sea lamprey,\u201d says Elisabeth Thysell of the Halland County Administrative Board in the interview. <\/p>\n

The results have come quickly. Spawning salmon were seen almost immediately upstream of the former migration barrier. Elisabeth Thysell estimates that the salmon can now migrate about one mil further up the river system and reach their important spawning grounds. <\/p>\n

The salmon can now migrate about one mil further upstream and reach their important spawning grounds.<\/p><\/blockquote>\n

Important Habitat for the Sea Lamprey<\/strong>(
\n ) The sea lamprey is often referred to as Sweden\u2019s most endangered fish species. The species has a complex life cycle and initially lives as a larva in sediment banks before undergoing a transformation and later living as a blood-sucking parasite in the ocean. After several years, it returns to rivers to spawn.<\/strong> <\/p>\n

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The former migration barrier is gone. Salmon, sea lampreys, and other species can now migrate freely.
Photo: Nicka Hellenberg<\/p><\/div>\n

Today, the species is found only in a few rivers in Halland and V\u00e4stra G\u00f6taland. It is estimated that there are fewer than 50 adult individuals remaining from the previous year. <\/p>\n

That is precisely why the restoration of the Okome Mill could be significant.
\n\u201cWith unobstructed migration routes and improved habitats, the species may be able to reach its upstream spawning grounds,\u201d says Elisabeth Thysell, an expert on the sea lamprey and its biology.<\/p>\n