Carmarthen Bay common scoter (Melanitta nigra) data from the winter 2016 - 2017
This is data of common scoter locations collected by contractors APEM from aerial survey in the winter of 2016 to 2017. Carmarthen Bay Special Protection Area (SPA) was the first fully marine SPA in the UK; it includes areas of sea, coast and estuary that support a wide range of different marine habitats and wildlife. The SPA was designated in June 2003 solely for wintering common scoter (Melanitta nigra) and is the most important individual wintering site in Britain and Ireland for this species. To properly manage and report on the condition of the SPA, accurate population estimates are needed.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS121783
- Teitl Amgen
-
- Carmarthen Bay data 2016 - 2017
- Data Bae Caerfyrddin 2016 - 2017
- Laith Metadata
- English
- Datganiad
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Two high resolution aerial digital surveys were conducted of Carmarthen Bay SPA, one in December 2016 and one in February 2017. The aerial survey design was based on an irregular grid with 2 cm Ground Sampling Distance (GSD) resolution, designed to deliver approximately 22% coverage of the SPA and a high statistical modelling precision. Up-to-date ‘procedural guidelines’ and site-specific ‘standard operating procedures’ were developed and adhered to during the aerial digital surveys. The target species was common scoter, but other species present in large numbers during both aerial digital surveys included large gulls, small gulls and waders. Several marine mammals (including porpoises and / or dolphin species and phocids) were also recorded. Aerial digital survey results from December 2016 produced a population estimate of 35,211 (with lower and upper 95% confidence limits of 19,283 and 66,875 respectively). The February 2017 aerial digital survey results produced a population estimate of 36,314 (with lower and upper 95% confidence limits of 19,360 and 74,701 respectively). The February 2017 population estimate likely represents the peak abundance estimate for common scoter utilising Carmarthen Bay SPA during 2016/17. Common scoters were assessed to be in ‘Favourable Condition’ as the latest five-year mean peak far exceeded the SPA’s designated total of 16,946 individuals. As these aerial digital surveys covered the whole of Carmarthen Bay SPA, they do not only provide an estimated population size which is repeatable and comparable to previous/further surveys, but also the opportunity to analyse spatio-temporal distribution and trends.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2017-12-31
Ystod amser
- Dyddiad cychwyn
- 2016-01-11
- Dyddiad gorffen
- 2017-01-03
- Categori pwnc
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- Environment
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Geographic Information System
Geographic Information System
()
- Math
-
ESRI Feature Class
-
Geographic Information System
Geographic Information System
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
-
Two high resolution aerial digital surveys were conducted of Carmarthen Bay SPA, one in December 2016 and one in February 2017. The aerial survey design was based on an irregular grid with 2 cm Ground Sampling Distance (GSD) resolution, designed to deliver approximately 22% coverage of the SPA and a high statistical modelling precision. Up-to-date ‘procedural guidelines’ and site-specific ‘standard operating procedures’ were developed and adhered to during the aerial digital surveys. The target species was common scoter, but other species present in large numbers during both aerial digital surveys included large gulls, small gulls and waders. Several marine mammals (including porpoises and / or dolphin species and phocids) were also recorded. Aerial digital survey results from December 2016 produced a population estimate of 35,211 (with lower and upper 95% confidence limits of 19,283 and 66,875 respectively). The February 2017 aerial digital survey results produced a population estimate of 36,314 (with lower and upper 95% confidence limits of 19,360 and 74,701 respectively). The February 2017 population estimate likely represents the peak abundance estimate for common scoter utilising Carmarthen Bay SPA during 2016/17. Common scoters were assessed to be in ‘Favourable Condition’ as the latest five-year mean peak far exceeded the SPA’s designated total of 16,946 individuals. As these aerial digital surveys covered the whole of Carmarthen Bay SPA, they do not only provide an estimated population size which is repeatable and comparable to previous/further surveys, but also the opportunity to analyse spatio-temporal distribution and trends.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
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- common scoter (black scoter)
- melanitta nigra
- aerial photography (air photography) (aerial photographs)
- aerial surveys
- Carmarthen Bay
- Carmarthen Bay and Estuaries SAC
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
-
Census of common scoter in Carmarthen Bay SPA: winter 2016 - 2017
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Attribution statement: Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313231373833 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:16:12.243Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
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1.0