Grey Seal Census for North Wales 2001
The grey seal, Halichoerus grypus, is relatively uncommon globally with estimates of 300,000 individuals across the north Atlantic in 2000. In the British Isles, the grey seal is more common that other species of seal breeding. This dataset contains the results of a full census of grey seal pup production in North Wales for the 2001 season. The aim of this project was to undertake an appropriate level of survey of grey seals in North Wales, from Aberystwyth to the Dee Estuary, in order to lead to a clearer understanding of the abundance and distribution of grey seals and pup production, and thereby to guide management. The objectives were to: - Locate and document all major sites where grey seal haul out for moulting and breeding, - Confirm the timing and extent of the breeding season - Locate and document all breeding sites in North Wales - Count the number of pups at each of these sites at regular intervals throughout that breeding season in 2001, in order to estimate pup production - Continue the daily pupping census of Bardsey Island - Take photographs of profiles to identify pelage markings of individuals for possible computer-aided matching in the future - Identify areas where seals are subject to disturbance by humans - Assess the quality of breeding haul-out environment - Advise on appropriate levels of monitoring / surveillance.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS115625
- Alternative Title
-
- The distribution of Grey Seals (Halichoerus grypus) and census of pup production in North Wales 2001
- Metadata Language
- English
- Lineage
-
INFORMATION WARNING: The dataset within this dataset are wrong. The dates are incorrectly coded as 2010 instead of 2001. The coasts surveyed lie between Aberystwyth in the south to the Dee estuary in the east and includes the coast of Anglesey. In addition to this the coasts of all island adjacent to these coasts are also included. The coastline was split into six sections, The Penrhyn Llyn, Ynys Enlli, Ynys Mon West, Ynys Mon East, Great Orme and Little Orme, The Dee Esturary. On foot surveys were conducted. Wave ski surveys were conducted to reach offshore environments in a more or less silent way, thereby minimising the prospect of causing disturbance to the seals. Sites which were even further offshore or in particularly exposed areas where tidal races occurred, were accessed via boat.
- Dataset Reference Date (Publication)
- 2002-12-31
Temporal Extent
- Begin date
- 2001-01-01
- End date
- 2002-12-31
- Topic category
-
- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
-
unknown
Distribution
- Format Type and Description
-
-
Documents
Documents
()
- Specification
-
Excel spreadsheets for all sites available.
-
Documents
Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
INFORMATION WARNING: The dataset within this dataset are wrong. The dates are incorrectly coded as 2010 instead of 2001. The coasts surveyed lie between Aberystwyth in the south to the Dee estuary in the east and includes the coast of Anglesey. In addition to this the coasts of all island adjacent to these coasts are also included. The coastline was split into six sections, The Penrhyn Llyn, Ynys Enlli, Ynys Mon West, Ynys Mon East, Great Orme and Little Orme, The Dee Esturary. On foot surveys were conducted. Wave ski surveys were conducted to reach offshore environments in a more or less silent way, thereby minimising the prospect of causing disturbance to the seals. Sites which were even further offshore or in particularly exposed areas where tidal races occurred, were accessed via boat.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
-
- census
- seal breeding census
- grey seals
- halichoerus grypus
- seals (see also specific species)
- pinnipedia (pinnipeds)
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
-
- Seal behaviour
- Seal abundance
- Seal reproduction
- Habitat extent
- Seal morphology and physiology
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Keywords
-
NRW SMNR Vocabulary
-
- Sustainable Management of Natural Resources (SMNR)
- Animals, Plants and Other Organisms (SMNR)
- Natural Resources (incl. Features and Processes) (SMNR)
- Marine (SMNR)
- Type
- Theme
Citation
- Date (Revision)
- 2023-12-27
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
The distribution of grey seals (halichoerus grypus) and census of pup population in North Wales 2001
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.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313135363235 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:38:32.875Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0