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UK Dolphins Genetically Isolated Despite Vast Range
3 Aug
Summary
- British Risso's dolphins roam extensively but remain genetically distinct.
- Dolphin DNA shows no mixing with populations outside the British Isles.
- Isolated UK population may face different threats, requiring local conservation.
Risso's dolphins in the British Isles exhibit a fascinating genetic distinctiveness, a recent study has revealed. Despite roaming thousands of miles across the UK's waters, from the Outer Hebrides to the Isle of Man, these dolphins have maintained genetic isolation from populations in the Mediterranean and the Azores. Scientists analyzing DNA from stranded dolphins between 1992 and 2016 found no intermixing with dolphins from further afield.
The research indicates that while there are no significant genetic differences within various sections of the British Isles, these dolphins may consistently return to specific areas. This unique situation, where populations are physically similar but genetically isolated, leaves the UK population with lower genetic diversity. Conservation efforts must now focus on habitat-specific management to address local pressures and safeguard these distinct dolphin groups effectively.
