Status and Breeding of Cormorants Phalacrocorax carbo in Wales (1996-1997): The Effect of the Sea Empress Oil Spill

The Sea Empress Environmental Evaluation Committee (SEEEC) and the Countryside Council for Wales (CCW) commissioned various studies of the effects of the oil spill on the wildlife of Pembrokeshire. This dataset contains the results of work carried out to investigate the effects of the spill on Cormorants Phalacrocorax carbo. In 1996 the project aimed to carry out a survey of the numbers, distribution and breeding performance of cormorants breeding in Wales, including detailed case studies at colonies in the area contaminated by oil in south and west Pembrokeshire. Monitoring of numbers and breeding performance was continued in 1997 with detailed studies of breeding phenology and breeding success at two South Pembrokeshire colonies (St Margaret's Island and Green Scar). Data was used to assess the numbers and distribution of Cormorants breeding in Wales; and to investigate the breeding performance of Cormorants in Wales, including detailed case studies at colonies in the area contaminated by oil in south and west Pembrokeshire.

Identifier: NRW_DS110099

Alternative Title

Statws a nythu mulfrain Phalacrocorax carbo yng Nghymru: effaith gollyngiad olew'r Sea Empress

Metadata Language: English

Lineage: 1996: Case studies of breeding phenology and breeding success were carried out at four colonies in South Pembrokeshire. The count unit adopted was the apparently occupied nest (aon). A colony was defined as any aggregation of nests separated by at least 500 m from the next nearest aggregation. Breeding cormorants were counted by single counts timed to coincide with the main incubation or early chick-rearing stages (late May to early June)At colonies in which studies of breeding biology were being conducted repeat counts throughout the breeding period, also recording the position and status of all nests were taken. This technique allows early failures and late starters to be identified and is therefore the most accurate method. Brood size was monitored at 11 colonies in Wales: four in South Pembrokeshire close to the source of the oil spill , three in Cardigan Bay and four in North Wales. For comparison, data were also collected from three colonies in Devon and one in Caithness. All were visited on at least one occasion when the young were between four weeks old and fledging. 1997: Survey methodology follows that of Cormorant Breeding Colony Survey ( Sellers 1997). Brood size monitored at 8 colonies and three visits were made to St Margaret's Island and Green Scar to monitor breeding success.

Dataset Reference Date (Publication): 1997-11-30

Temporal Extent

Begin date: 1996-01-01

End date: 1997-06-14

Topic category

Biota

Owner

Natural Resources Wales (NRW)

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

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

Originator

Countryside Council for Wales (CCW)

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

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

Extent

Geographic Extent: Wales (WLS)

Geographic Extent: England (ENG)

Map representing the geographic extent of the dataset

Vertical Extent

Medin Extent Keyword: benthic boundary layer

Format Type and Description

Documents Documents ()

Specification

[A] Paper reports (MS Word, pdf-format)

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: 1996: Case studies of breeding phenology and breeding success were carried out at four colonies in South Pembrokeshire. The count unit adopted was the apparently occupied nest (aon). A colony was defined as any aggregation of nests separated by at least 500 m from the next nearest aggregation. Breeding cormorants were counted by single counts timed to coincide with the main incubation or early chick-rearing stages (late May to early June)At colonies in which studies of breeding biology were being conducted repeat counts throughout the breeding period, also recording the position and status of all nests were taken. This technique allows early failures and late starters to be identified and is therefore the most accurate method. Brood size was monitored at 11 colonies in Wales: four in South Pembrokeshire close to the source of the oil spill , three in Cardigan Bay and four in North Wales. For comparison, data were also collected from three colonies in Devon and one in Caithness. All were visited on at least one occasion when the young were between four weeks old and fledging. 1997: Survey methodology follows that of Cormorant Breeding Colony Survey ( Sellers 1997). Brood size monitored at 8 colonies and three visits were made to St Margaret's Island and Green Scar to monitor breeding success.

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

cormorants
phalacrocorax carbo
Sea Empress
distributions
breeding
breeding birds
case studies
Pembrokeshire (county pre 1974)( county since 4/96)
marine and freshwater inventory
breeding performance
colonies

Type: Theme

Citation

Date (Publication): 2023-12-31

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

Keywords

SeaDataNet Parameter Discovery Vocabulary

Bird taxonomy-related abundance per unit area of surface

Type: Theme

Citation

Date (Revision): 2021-01-06

Code: geonetwork.thesaurus.external.theme.rdf+xml

Keywords

Integrated Public Sector Vocabulary

oil spillage

Type: Theme

Citation

Date (Revision): 2013-04-03

Code: geonetwork.thesaurus.external.theme.subjects

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

NRW Related Title: Status and breeding success of cormorants phalacrocorax carbo in Wales in 1996 : the effect of the Sea Empress oil spill

NRW Related Title: Status and breeding success of Cormorants Phalacrocorax carbo in Wales 1997

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 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: 4f4c4942-4343-5764-6473-313130303939 XML

Metadata Language: English

Resource type: Dataset

Metadata Date: 2024-05-31T09:41:20.425Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales (NRW)

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

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

Publishing Body

Access the portal

Full access to the portal and metadata.

Status and Breeding of Cormorants Phalacrocorax carbo in Wales (1996-1997): The Effect of the Sea Empress Oil Spill

Identification

Temporal Extent

Extent

Extent

Vertical Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

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