Scottish Natural Heritage Commissioned Report No. 696 Aerial survey of northern gannet (Morus bassanus) colonies off NW Scotland 2013 COMMISSIONED REPORT Commissioned Report No. 696 Aerial survey of northern gannet (Morus bassanus) colonies off NW Scotland 2013 For further information on this report please contact: Andy Douse Scottish Natural Heritage Great Glen House INVERNESS IV3 8NW Telephone: 01463 725000 E-mail:
[email protected] This report should be quoted as: Wanless, S., Murray, S. & Harris, M.P. 2015. Aerial survey of northern gannet (Morus bassanus) colonies off NW Scotland 2013. Scottish Natural Heritage Commissioned Report No. 696. 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 2015. COMMISSIONED REPORT Summary Aerial survey of northern gannet (Morus bassanus) colonies off NW Scotland 2013 Commissioned Report No. 696 Project No: 14641 Contractor: Centre for Ecology and Hydrology Year of publication: 2015 Keywords Northern gannet; Sula Sgeir; St Kilda; Flannan Islands; Sule Stack: Sule Skerry; gugas; population trends. Background Scottish Natural Heritage (SNH) commissioned an aerial survey of selected colonies of northern gannets (Morus bassanus) off the NW coast of Scotland in 2013. The principal aim was to assess the status of the population in this region, which holds some important, but infrequently counted colonies (St Kilda, Sula Sgeir, Sule Stack, Flannan Islands and Sule Skerry). In addition, an up-to-date assessment was required to review the basis for the licensed taking of young gannets (gugas) from the island of Sula Main findings Aerial surveys of all five colonies were successfully carried out on 18 and 19 June 2013.