Baltic marine mammal population boundaries and phylogeography Morten Tange Olsen HELCOM Seal 8 Turku, Oct 2014.

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Presentation transcript:

Baltic marine mammal population boundaries and phylogeography Morten Tange Olsen HELCOM Seal 8 Turku, Oct 2014

Harbour seal management units

Olsen et al 2014 Mol Ecol

Baltic harbour seals mtDNA

Gråsælen Grey seal population structure

mtDNA – 226 modern + 50 historic samples – 435 bp control region Microsatellites – 79 modern samples – 14 loci;

SCOTLAND WADDEN SEA LÆSØ RØDSAND FALSTERBO CHR.Ø SCOTLAND WADDEN SEA RØDSAND FALSTERBO CHR.Ø

Grey seal genetic diversity Danish historic (54) North Sea modern (71) Baltic modern (142)

Grey seal finds ( BP) Sommer and Benecke 2003

Grey seal finds ( BP) Sommer and Benecke 2003

Grey Harbour Ringed Porpoise ? ?

Changes in species composition (DK)

Future studies Combined genetic analysis of harbour, grey and ringed seal, and porpoise Population structure and divergence times – Geological events – Climate events – Environmental factors – Historic abundance and distribution Existing mtDNA and microsatellite data Genomic data and ancient DNA