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.

Dynodydd: NRW_DS107795

Teitl Amgen

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

Laith Metadata: English

Datganiad: 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.

Gwybodaeth ychwanegol: 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

Dyddiad cyfeirnod y set ddata (Cyhoeddiad): 2016-08-17

Ystod amser

Dyddiad cychwyn: 2001-01-01

Dyddiad gorffen: 2007-09-09

Categori pwnc

Biota

Perchennog

Natural Resources Wales (NRW)

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

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

Cychwynnwr

Various contractors

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

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

Rhychwant

Hyd: Wales (WLS)

Map representing the geographic extent of the dataset

Dosbarthiad

Fformat - Math a Disgrifiad

Database Database ()

Math

Data is held in Recorder 6

Lleolwr Adnoddau

View and Download Data

World Wide Web page

Ansawdd Data

Cwmpas Ansawdd: Dataset

Cydymffurfiad: 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
Eglurhad
Gradd: false

Datganiad: 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.

Allweddair

GEMET - INSPIRE themes, version 1.0

Species distribution

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2008-06-01

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

Allweddair

NRW Thesaurus

bullhead
cottus gobio
Special Area of Conservation Monitoring
NBN Atlas
National Biodiversity Network [NBN]

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2023-12-31

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

Allweddair

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)

Math: Theme

Dyfyniad

Dyddiad (Adolygu): 2023-12-27

Cod: geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords

Cod: British National Grid (EPSG::27700)

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

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 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).

Defnyddiwch gyfyngiadau

Cyfyngiadau Defnyddio: Other restrictions

Cyfyngiadau eraill: © 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

Dynodydd Ffeil: 4f4c4942-4343-5764-6473-313037373935 XML

Laith Metadata: English

Dynodydd Rhiant: Natural Resources Wales (NRW) Species Data on the NBN Atlas
NRW_DS116805

Math o adnodd: Dataset

Dyddiad Metadata: 2024-05-31T09:38:31.794Z

Enw Safonol Metadata: NRW

Fersiwn Metadata: 1.0

Pwynt Cyswllt

Natural Resources Wales (NRW)

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

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

Corff Cyhoeddi

Mynediad i'r Porth

Mynediad llawn i'r porth a'r metadata.

Freshwater Bullhead Survey Data in Wales

Dull adnabod

Ystod amser

Rhychwant

Rhychwant

Dosbarthiad

Dosbarthiad

Ansawdd

Ansawdd Data

Allweddeiriau

Allweddair

Dyfyniad

Allweddair

Dyfyniad

Allweddair

Dyfyniad

System Cyfeirio Gofodol

Cynnwys

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

Cyfyngiadau

Cyfyngiadau

Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus

Cyfarwyddeb Cyfyngiadau Mynediad

Testun cyfyngiadau mynediad

Defnyddiwch gyfyngiadau

Metadata

Metadata

Corff Cyhoeddi