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Metadata: Cockle and Mussel Stock (bird food) Surveys in the Dee, Traeth Lafan and Burry Inlet 2004
Abstract:
Special Protection Areas (SPAs) are strictly protected sites classified in accordance with Article 4 of the EC Birds Directive. They are classified for rare and vulnerable birds (as listed on Annex I of the Directive), and for regularly occurring migratory species. The Dee Estuary, Traeth Lafan and Burry Inlet SPA support nationally and internationally important populations of wildfowl and waders as well as important cockle fisheries. The removal of cockles and the associated disturbance caused by fishing them needs to be balanced with bird food requirements. The aim of the project is to assess the food requirements of wading birds, such as oystercatcher and knot that over-winter in these areas in order to set monitoring targets and to assess the implications of cockle and mussel fishing scenarios to the bird populations. The purpose of this data capture was to provide data on stock abundance and distribution across the whole of the survey areas. The data collected and its results will primarily be used for site monitoring and also for casework. Longer term work on the Burry Inlet may combine this data with data gathered on bird foraging behaviour, together with site specific data on bird numbers and used in an individual behaviour based model to predict the food requirements of a bird population.
Data holder:
Natural Resources Wales (NRW)
Click on the red button for resource contact details:
- Click on the red button for resource contact details
| Other details | ||
| Internal code | Internally assigned metadata identifier | 8598 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Cockle and Mussel Stock (bird food) Surveys in the Dee, Traeth Lafan and Burry Inlet 2004 |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | NRW_DS109749 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313039373439 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2004-08-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2004-09-30 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Special Protection Areas (SPAs) are strictly protected sites classified in accordance with Article 4 of the EC Birds Directive. They are classified for rare and vulnerable birds (as listed on Annex I of the Directive), and for regularly occurring migratory species. The Dee Estuary, Traeth Lafan and Burry Inlet SPA support nationally and internationally important populations of wildfowl and waders as well as important cockle fisheries. The removal of cockles and the associated disturbance caused by fishing them needs to be balanced with bird food requirements. The aim of the project is to assess the food requirements of wading birds, such as oystercatcher and knot that over-winter in these areas in order to set monitoring targets and to assess the implications of cockle and mussel fishing scenarios to the bird populations. The purpose of this data capture was to provide data on stock abundance and distribution across the whole of the survey areas. The data collected and its results will primarily be used for site monitoring and also for casework. Longer term work on the Burry Inlet may combine this data with data gathered on bird foraging behaviour, together with site specific data on bird numbers and used in an individual behaviour based model to predict the food requirements of a bird population. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The 2004 cockle and mussel survey was contracted to Aquatic Survey and Monitoring Ltd., who sub-contracted individuals to make up the survey teams in North Wales and South Wales. Three areas were surveyed - the Dee Estuary, Traeth Lafan and the Burry Inlet. Over 400 cockle survey stations (on a grid system) were surveyed in each area, using GPS, 0.1m2 quadrats and a sieve of 2 mm mesh. Cockles retained in the sieve were measured and counted; enabling the production of cockle density maps and estimates of the total cockle populations of each area. Mussel beds in each survey area were also surveyed in a similar way, and all mussels over 10 mm length in each 0.1m2 quadrat were measured and counted. This enabled the estimation of the total mussel populations of each bed. The full analysis of the data will be the subject of a later report in CCWs Marine Monitoring Report Series (West et al. 2004). All data was collected by staff with a background in Biological Sciences using rigid rules laid out in the report methodology. All data entry was subject to auto-validation and conditional formatting. A copy of the data was checked regularly by the project manager for errors. The data was put through a rigorous series of verification procedures to ensure that there were no inconsistencies between the field records, the shellfish measurements and the sub-sample records. The field notebooks and recording sheets were also supplied to the project manager and numerous records were checked for accuracy of the data entry. |
| Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | All data is published in the CCW Marine Monitoring Report no. 16. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitats and biotopes |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | unionidae | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | waders (see also specific species) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Lafan sands (Lavan sands)(Traeth Lafan) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Dee estuary | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Special Protection Areas (SPAs) (see also proposed Special Protection Area pSPA) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | mussels | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | cockles | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | cerastoderma edule (previously known as cardium edule) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | food stock | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Burry Inlet | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Shellfish abundance and biomass in water bodies | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.513067 |
| East | The eastern-most limit of the data resource in decimal degrees | -2.608865 |
| South | The southern-most limit of the data resource in decimal degrees | 51.240829 |
| West | The western-most limit of the data resource in decimal degrees | -5.777741 |
| Regional sea | benthic boundary layer | |
| Wales (WLS) | ||
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Coastal Assessment Liaison and Monitoring (CALM) | |
| Delivery point | Ti Cara, Point Lane, Cosheston, Pembrokeshire, SA72 4UN, Wales | |
| jon@ticara.co.uk | ||
| URL | <!--No website --> | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Various contractors | |
| Delivery point | See Natural Resources Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresourceswales.gov.uk/splash?orig=/ | |
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | This states any limitations on access to the data. Multiple occurences are allowed here. One entry shall be from the INSPIRE Metadata registry and the other free text should be part of the resource `Have specific limitations`. | There are no access restrictions to this data. NRW may release, publish or disseminate it freely. |
| no limitations | ||
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | © 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. |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Documents |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2004-11-30 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-03 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |
| Metadata parent | NRW_DS108873 | |