What is causing the extensive damage to fish in the small Swedish lake "Molnbyggen" . In order to determine the cause the Swedish Environmental Protection Agency (SEPA) has stepped in to work with the municipality of Leksand in Central Sweden. It is believed that endocrine disrupting substances, leaked from a nearby landfill are to blame.
The damage was discovered by local people four years ago. This led to an extensive study by a group of researchers from the Institute of Applied Environmental Research at Stockholm University. They found that up to 30 per cent of the fish in the lake showed signs of damage, including open wounds and fin deformations. However, the most pronounced biological effect was the underdeveloped ovaries found in female fish, affecting reproduction. The ovaries in female perch were 80 per cent decreased compared to female perch in a control lake. Some male fish also suffered hormonal damages.
It is not yet clear which substance or substances are involved, but evidence points increasingly to a public landfill site located 3-4 kilometres from the lake Molnbyggen. SEPA and the local authority have decided to carry out a thorough investigation of the problems.
"We are stepping in to help Leksand municipality, partly to trace the substances as quickly as possible. But also to determine what consequences the environmental damage in Molnbyggen can have for other landfill sites in the country", says head of section Bjrn Sdermark at SEPA.
"The results from Molnbyggen can also provide important information in our current work with waste treatment and disposal, including new general guidelines and tighter regulations for landfill disposal," he adds.
Head of the environmental health department in Leksand, Olle Bergfors, comments:
"We are
positive towards the Environmental Protection Agency stepping in to support our
investigation. So
far, the local authority has invested SEK 1 million in the project. With their
help, we hope to ge
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Contact: Bjorn Sodermark
bjorn.sodermark@environ.se
46-8-698-1141
Swedish Environmental Protection Agency
26-Oct-1998