61d40f7c-1f4f-4e27-a6b0-2de52bff58cc English series series 2026-07-22T10:24:41 MEDIN 3.1.2 biota Bird counts SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Bird behaviour SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Research The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Research and Development Activity The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Species distribution GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision inapplicable 2006-10-01T00:00:00 2006-10-01T00:00:00 -9.33312855790775 2.68743327033997 49.0399981037863 60.7672028638749 TCE-254 Marine Data Exchange 2006, BTO, COWRIE Research, Use of Aerial Surveys to Detect Bird Displacement by Offshore Windfarms Use of Aerial Surveys to Detect Bird Displacement by Offshore Windfarms 2006-01-01T00:00:00 creation 2021-05-17T13:33:50 publication English This study makes use of previously collected aerial survey data, and uses a statistical technique called power analysis to assess whether current aerial survey methods allow changes in bird numbers to be detected, given that there are large background fluctuations in seabird numbers at any given site. Five species, two of which were combined due to the difficulty of separation were selected for analysis: red-throated diver (Gavia stellata), common scoter (Melanitta nigra), sandwich tern (Sterna sandvicensis) and lesser and greater black-backed gulls (Larus fuscus and L. marinus). Maclean, I.M.D., Skov, H., Rehfisch, M.M. and Piper, W. (2006) Use of aerial surveys to detect bird displacement by offshore windfarms. BTO Research Report No. 446 to COWRIE. BTO, Thetford. This publication (excluding the logos) may be re-used free of charge in any format or medium. It may only be re-used accurately and not in a misleading context. The material must be acknowledged as COWRIE Ltd copyright and use of it must give the title of the source publication. Where third party copyright material has been identified, further use of that material requires permission from the copyright holders concerned. Presentation type: digital representation of a primarily textual item (can contain illustrations also) Origin: BTO There will be no limitations when published on the Marine Data Exchange otherRestrictions Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use otherRestrictions The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian British Trust for Ornithology None ilya.maclean@bto.org originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor COWRIE cowrie@offshorewind.co.uk owner notPlanned Documents https://www.marinedataexchange.co.uk/details/TCE-254/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08T00:00:00 publication Conformity with the Commission Regulation (EU) No 1089/2010 was either not relevant to this dataset or not a requirement of the Marine Data Exchange for the creation and submission of this dataset; therefore, conformity has not been assessed and cannot be declared False series In this report we make use of existing aerial survey data and use power analyses to assess whether the current DTI aerial survey scheme can be used to assess whether changes in bird numbers occur, given that there are large background fluctuations in seabird numbers at any given site. Four taxa were selected for analysis: red-throated diver (Gavia stellata), common scoter (Melanitta nigra), sandwich tern (Sterna sandvicensis) and lesser and greater black-backed gulls (Larus fuscus and L. marinus). Aerial surveyors are not usually able to distinguish between these two large gull species. In addition, we tested the importance of using a higher resolution of collected distances in relation to the detection probability of target species during current DTI aerial survey British Trust for Ornithology None ilya.maclean@bto.org pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84