Scottish Natural Heritage Commissioned Report No. 874 Assessing the effectiveness of early warning systems for the detection of marine invasive non-native species in Scottish waters COMMISSIONED REPORT Commissioned Report No. 874 Assessing the effectiveness of early warning systems for the detection of marine invasive non-native species in Scottish waters For further information on this report please contact: Eoina Rodgers Scottish Natural Heritage Great Glen House INVERNESS IV3 8NW Telephone: 01463 725000 E-mail:
[email protected] This report should be quoted as: Cook, E.J., Beveridge, C., Twigg, G. & Macleod, A. 2015. Assessing the effectiveness of early warning systems for the detection of marine invasive non-native species in Scottish waters. Scottish Natural Heritage Commissioned Report No. 874. This report, or any part of it, should not be reproduced without the permission of Scottish Natural Heritage. This permission will not be withheld unreasonably. The views expressed by the author(s) of this report should not be taken as the views and policies of Scottish Natural Heritage. © Scottish Natural Heritage Year 2015. COMMISSIONED REPORT Summary Assessing the effectiveness of early warning systems for the detection of marine invasive non-native species in Scottish waters Commissioned Report No. 874 Project No: 14961 Contractor: Scottish Association for Marine Science Year of publication: 2015 Keywords Marine non-native species; early warning system; survey techniques; detection; marinas; fish farms. Background Invasive non-native species (INNS) are considered to be one of the greatest threats to biodiversity, particularly through their interactions with other drivers of change. These species are initially transported through human intervention outside their natural range and across ecological barriers, before becoming established in a new location, where they can have negative impacts on the ecology, as well as serious economic and social impacts.