Bullhead Monitoring for the Dee Catchment, 2004

Bullhead is listed under Annex II of the Habitat and Species Directive as a "species of community interest". Bullhead numbers have been declining across Europe in recent decades as a result of human activities. Bullhead is a designated feature on the River Dee and Bala Lake / Afon Dyfrdwy a Llyn Tegid Special Area of Conservation (SAC) in Wales. The purpose of this data capture was to assess bullhead abundances and population structure throughout the Special Area of Conservation (SAC) area. Population data for the fish bullhead (Cottus gobio) collected in the River Dee Catchment since 2001 and additional quantitative and semi-quantitative survey data to assess bullhead abundance from 2004.

Identifier: NRW_DS107797

Alternative Title

Bullhead Monitoring, Dee Catchment 2001-2004- CCW - RoC Report no. 19 CCW0002800000006
Monitro Llyfrothennod Dalgylch Afon Dyfrdwy, 2004
Bullhead Monitoring - CCW - RoC Report no.19

Metadata Language: English

Lineage: Relevant species abundance data was extracted from the overall spreadsheet supplied with the RoC Report. Where quantitive and semi-quantitive surveys were carried out on the same site at the same time then the semi-quantitive data has not been extracted (as this is a subset of the quantitive data). Historical data for 2001 - 2003: Data was collated from the North Wales Fisheries Monitoring Programme of 2001. A limited number of sites (approx 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 quantitive temporal data for sites surveyed annually or semi-quantitive spatial data for sites surveyed every 5 years. Three fishing runs were used for quantitive surveys and one for semi-quantitive surveys.

Additional Information: Rivers Ecologist, NRW Further information, including information on population structure is available in CCW Review of Consents Report no. 19. This dataset has been available to download on the NBN Gateway - See Metadata Unique Resource for full details: 107795

Dataset Reference Date (Publication): 2004-10-31

Temporal Extent

Begin date: 2001-01-01

End date: 2004-10-31

Topic category

Biota

Owner

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Originator

Various

Enquiries Unit, Maes y Fynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

http://naturalresourceswales.gov.uk/splash?orig=/

Originator

Environment Agency (EA)

Millbank Tower, 25th Floor, 21//24 Millbank, London, SW1P 4XL, England

http://www.environment-agency.gov.uk/

Originator

Countryside Council for Wales (CCW)

Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

http://naturalresourceswales.gov.uk/splash?orig=/

Originator

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Extent

Geographic Extent: POWYS - POWYS

Geographic Extent: GWYNEDD - GWYNEDD

Geographic Extent: SIR Y FFLINT - FLINTSHIRE

Geographic Extent: SIR DDINBYCH - DENBIGHSHIRE

Geographic Extent: CONWY - CONWY

Geographic Extent: WRECSAM - WREXHAM

Map representing the geographic extent of the dataset

Format Type and Description

Database Database ()

Specification

Data Archived under Project Number 295 Media Number 1198 [A] Published report held on Ffynnon DCT-10-027856 [B] Excel spreadsheets. [C] Map Info files of Bullhead Density [D] ArcGIS Files of Bullhead Density.

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
Degree: false

Lineage: Relevant species abundance data was extracted from the overall spreadsheet supplied with the RoC Report. Where quantitive and semi-quantitive surveys were carried out on the same site at the same time then the semi-quantitive data has not been extracted (as this is a subset of the quantitive data). Historical data for 2001 - 2003: Data was collated from the North Wales Fisheries Monitoring Programme of 2001. A limited number of sites (approx 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 quantitive temporal data for sites surveyed annually or semi-quantitive spatial data for sites surveyed every 5 years. Three fishing runs were used for quantitive surveys and one for semi-quantitive surveys.

Keywords

GEMET - INSPIRE themes, version 1.0

Species distribution

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

cottus gobio
bullhead
Special Areas of Conservation (SAC) - SAC monitoring
Dee estuary

Type: Theme

Citation

Date (Publication): 2023-12-31

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

NRW Related Title: River Dee candidate special area of conservation bullhead survey 2004

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.

Use Constraints

Use constraints type: Other restrictions

Other constraints: © 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

File Identifier: 4f4c4942-4343-5764-6473-313037373937 XML

Metadata Language: English

Parent Identifier: Freshwater Bullhead Survey Data in Wales
NRW_DS107795

Resource type: Dataset

Metadata Date: 2024-05-31T09:37:23.489Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Master Reference Data Team

Natural Resources Wales, Maes y Fynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

http://naturalresourceswales.gov.uk/splash?orig=/

Publishing Body

Access the portal

Full access to the portal and metadata.

Bullhead Monitoring for the Dee Catchment, 2004

Identification

Temporal Extent

Extent

Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body