Bogskär seals retrieved for analysis
Retrieving dead grey seals (Halichoerus grypus), Bogskär, South of Åland Islands, Finland. © OCEANA/ Xavier Pastor
Divers from the Oceana research vessel Hanse Explorer have led a Finnish Coast Guard patrol boat to a site close to Bögskar skerry to collect the carcasses of dead seals for analysis.
Last week at this location (a small island 30 miles south of Marienhamn) the environmentalists spotted at least a dozen dead seals of different sizes, at a depth of 10m.
The Oceana divers descended to collect several of the carcasses, which were transferred from the Hanse Explorer zodiacs to the Finnish patrol boat, and then taken to land for further investigation into the cause of death.
According to Oceana biologists onboard the research vessel, possible explanations for the mortality include natural causes, physical trauma, or infection by a toxin or virus. The animals had already been dead for several weeks when they were discovered by the Oceana team, so determining the cause of death at this point may not be possible.
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