Shellfish Stocks, Oystercatcher and Knot (bird) Modelling Data for the Dee Estuary, Traeth Lafan and the Burry Inlet and Three Rivers, Phase 2 (2003-2004)
The Dee, Traeth Lafan and Burry Inlet are designated Special Protection Areas (SPAs) for nationally and internationally important populations of wintering wildfowl and waders. To set conservation objections and assess the sites for Favourable Conservation Status, information is required on numbers of birds using the sites and the food supplies they require to survive the winter and attain adequate body condition for Spring Migration This is phase 2 of a project that was started in 2002-03 and uses existing and new data to parameterise an individual behaviour-based model to answer key questions relating to target setting, condition monitoring and management of each of the three sites. The purpose of this data capture was to inform the setting of conservation objectives for the SPAs and assess the favourable conservation status of bird populations.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS109822
- Metadata Language
- English
- Lineage
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An individual behaviour-based model (IBM) is used to predict the food requirements of a bird population. The model requires information on bird foraging behaviour together with site-specific data on bird numbers, and the size and distribution of cockle and mussel stocks. The following datasets were collated for the model 1. Ash Free Dry Mass analysis data files (excel spreadsheets) 2. Cockle and mussel survey data (excel spreadsheets) 3. Average daily temperatures (text files) Information on cockle and mussel stocks was collected by CCW for the 3 sites for 2003 and 2004 under a separate project. This builds on a scoping study (phase 1) that was undertaken in 2002-2003 that examined existing data to determine what additional data were required for the model and to determine the best methods for stock assessment. Data from Phase 1 is archived as project no 158 (Media 103).
- Dataset Reference Date (Publication)
- 2007-11-01
Temporal Extent
- Begin date
- 2003-01-01
- End date
- 2004-12-31
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
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benthic boundary layer
Distribution
- Format Type and Description
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Documents
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)
- Specification
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Input files are all spreadsheets and text file. Modelled data is model parameter files *.PAR undefined format.
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Documents
(
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Quality
Data quality
- Quality Scope
- Dataset
- Conformity
- 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
- Explanation
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This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Degree
- false
- Lineage
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An individual behaviour-based model (IBM) is used to predict the food requirements of a bird population. The model requires information on bird foraging behaviour together with site-specific data on bird numbers, and the size and distribution of cockle and mussel stocks. The following datasets were collated for the model 1. Ash Free Dry Mass analysis data files (excel spreadsheets) 2. Cockle and mussel survey data (excel spreadsheets) 3. Average daily temperatures (text files) Information on cockle and mussel stocks was collected by CCW for the 3 sites for 2003 and 2004 under a separate project. This builds on a scoping study (phase 1) that was undertaken in 2002-2003 that examined existing data to determine what additional data were required for the model and to determine the best methods for stock assessment. Data from Phase 1 is archived as project no 158 (Media 103).
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
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NRW Thesaurus
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- cockles
- mytilus edulis
- calidris canutus
- common mussel
- Special Protection Areas (SPAs) (see also proposed Special Protection Area pSPA)
- Dee estuary
- mussels
- Lafan sands (Lavan sands)(Traeth Lafan)
- haematopus ostralegus
- mussel beds
- cockle beds
- Burry Inlet
- shellfish
- oystercatchers
- knots
- unionidae
- cerastoderma edule (previously known as cardium edule)
- environmental modelling
- Type
- Theme
Citation
- Date (Publication)
- 2026-08-27
Keywords
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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Modelling, shorebirds and their food on the Dee estuary, Traeth Lafan and Burry inlet SPAs to inform target setting and site management-phase 2
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW 2004 There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313039383232 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2026-09-28T11:10:05.508Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0