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Marine invasives in the Clyde: What’s here? What’s coming our way?

Marine invasives in the Clyde: What’s here? What’s coming our way?. Fiona Manson Scottish Natural Heritage. Scottish Natural Heritage. Firth of Clyde: what is here?. Japanese skeleton shrimp. Carpet sea squirt. Acorn barnacle. Leathery sea squirt. Firth of Clyde: what is here?.

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Marine invasives in the Clyde: What’s here? What’s coming our way?

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  1. Marine invasives in the Clyde: What’s here? What’s coming our way? Fiona Manson Scottish Natural Heritage

  2. Scottish Natural Heritage Firth of Clyde: what is here? Japanese skeleton shrimp Carpet sea squirt Acorn barnacle Leathery sea squirt

  3. Firth of Clyde: what is here? Wireweed Common cord grass Green sea fingers

  4. Photo: Kames Farm Equipment How do they get here? Shipping commercial and recreational • Hull-fouling • Ballast water exchange Aquaculture • Target species • Associated species

  5. Why does it matter? Ecological impacts Economic impacts

  6. Case study: Wireweed

  7. Based on Harries et al. 2007 Wireweed: UK distribution ? 2004 1995 2000 - 2004 1973 1990 - 2000 1973 -1980

  8. Surveys and Public Sightings Wireweed: Current distribution in Scotland

  9. A new arrival: Carpet sea squirt Didemnum vexillum

  10. Why does it matter? Impacts on biodiversity

  11. Why does it matter? Issues for shellfish farming: • Fouling of equipment • Fouling of stock • Impact on growth

  12. Why does it matter? Issues for boaters: • Hull fouling • Increased drag • Extra cleaning

  13. Where is it?

  14. Scottish Natural Heritage What should I do if I see carpet sea squirt? Email: carpetseasquirt@snh.gov.uk (include a photograph if possible) Phone: 01738 458641 Or contact your local SNH office www.nonnativespecies.org

  15. Scottish Natural Heritage What can we do about it? • Options: • Do nothing • Control / manage / best practice • (learn to live with it) • Eradication

  16. Scottish Natural Heritage What can we do? Holyhead Harbour – eradication

  17. Scottish Natural Heritage Firth of Clyde: what’s coming? Slipper limpet Chinese mitten crab ??? Japanese red alga

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