Freshwater Bullhead Survey Data in Wales
Bullhead is listed under Annex II of the Habitat and Species Directive as a species of community interest and is a feature on the River Wye Afon Gwy and River Usk Afon Wysg Special Areas of Conservation (SACs) in Wales. Bullhead numbers have been declining across Europe in recent decades as a result of human activities. The purpose of this data capture was to monitor bullhead populations to assess whether SAC management adequately protects that species.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS107795
- Alternative Title
-
- Bullhead Monitoring, Wye and Usk Catchments 2007 - CCW- Report no. 818 CCW000280000000B.
- Bullhead Monitoring, Dee Catchment 2001-2004- CCW - RoC Report no. 19 CCW0002800000006
- Data Arolwg ar Bennau Lletwad
- Metadata Language
- English
- Lineage
-
Relevant species abundance data was extracted from the overall spreadsheet supplied with the RoC Report. Where quantitative and semi-quantitative surveys were carried out on the same site at the same time then the semi-quantitative data has not been extracted (as this is a subset of the quantitative data). Historical data for 2001 - 2003: Data was collated from the North Wales Fisheries Monitoring Programme of 2001. A limited number of sites (approximately 12) are fished on an annual basis to obtain information and detect trends within the fish populations and catches. Bullhead populations were also recorded as part of the Dee Stock Assessment Programme on a selection of sites in 2004 and as part of work on the Eel Monitoring Programme at 3 sites in the Dee Catchment for 2004. All sites were surveyed using the electric fishing equipment in accordance with protocols described in the Environment Agency - Electric Fishing Theory and Practice Manual (1988). Two methodologies were employed either quantitative temporal data for sites surveyed annually or semi-quantitative spatial data for sites surveyed every 5 years. Three fishing runs were used for quantitative surveys and one for semi-quantitative surveys.
- Additional Information
-
This published packaged dataset is made up of two separate datasets. Please see the following metadata entries for further information: 107797 Bullhead Monitoring for the Dee Catchment, 2004 108557 Bullhead Monitoring for the Usk and Wye Catchments, 2007
- Dataset Reference Date (Publication)
- 2016-08-17
Temporal Extent
- Begin date
- 2001-01-01
- End date
- 2007-09-09
- Topic category
-
- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
Distribution
Distribution
- Format Type and Description
-
-
Database
Database
()
- Specification
-
Data is held in Recorder 6
-
Database
Database
()
- Resource Locator
-
View and Download Data
World Wide Web page
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Relevant species abundance data was extracted from the overall spreadsheet supplied with the RoC Report. Where quantitative and semi-quantitative surveys were carried out on the same site at the same time then the semi-quantitative data has not been extracted (as this is a subset of the quantitative data). Historical data for 2001 - 2003: Data was collated from the North Wales Fisheries Monitoring Programme of 2001. A limited number of sites (approximately 12) are fished on an annual basis to obtain information and detect trends within the fish populations and catches. Bullhead populations were also recorded as part of the Dee Stock Assessment Programme on a selection of sites in 2004 and as part of work on the Eel Monitoring Programme at 3 sites in the Dee Catchment for 2004. All sites were surveyed using the electric fishing equipment in accordance with protocols described in the Environment Agency - Electric Fishing Theory and Practice Manual (1988). Two methodologies were employed either quantitative temporal data for sites surveyed annually or semi-quantitative spatial data for sites surveyed every 5 years. Three fishing runs were used for quantitative surveys and one for semi-quantitative surveys.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
-
- bullhead
- cottus gobio
- Special Area of Conservation Monitoring
- NBN Atlas
- National Biodiversity Network [NBN]
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
-
NRW SMNR Vocabulary
-
- Freshwater and Wetlands (SMNR)
- Sustainable Management of Natural Resources (SMNR)
- Ecosystem (SMNR)
- Management Areas (SMNR)
- Water Quality (SMNR)
- Animals, Plants and Other Organisms (SMNR)
- Natural Resources (incl. Features and Processes) (SMNR)
- Type
- Theme
Citation
- Date (Revision)
- 2023-12-27
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
-
There are no access restrictions to this data. NRW may release, publish or disseminate it freely. This dataset does not contain sensitive species data. Names and addresses of landowners and others is restricted (Data Protection Act).
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© CNC/NRW and Environment Agency 2007 You may reproduce this dataset free of charge for non-commercial and internal business purposes in any format or medium, provided that you do so accurately, acknowledging both the source and NRW's and Environment Agency's copyright, and do not use it in a misleading context. To avoid using old information, we recommend that you obtain the latest version from the original source. NRW owns all intellectual property rights (including copyrights and database) to the collation and data originated by NRW. The Environment Agency (EA) holds the copyright to data originated by EA. NRW has permission to release this data on behalf of both parties.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313037373935 XML
- Metadata Language
- English
- Parent Identifier
-
Natural Resources Wales (NRW) Species Data on the NBN Atlas
NRW_DS116805
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:38:31.794Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0