Diver Observations on Arctic Charr (Salvelinus alpinus) Spawning Grounds in Llyn Padarn Sites of Special Scientific Interest (SSSI) - December 2010
Sylwadau'r nofiwr tanddwr ar leoedd epilio'r Torgoch (salvelinus alpinus L.) yn SoDdGA Llyn Padarn

  • English
  • wel
  • All

Llyn Padarn is a large, natural lake located at the foot of Snowdon alongside the village of Llanberis, North Wales. The lake is designated as a Site of Special Scientific Interest (SSSI) for its rare, genetically distinct Arctic charr (Salvelinus alpinus) population, the presence of the nationally scarce Annex II aquatic macrophyte, Luronium natans L. (Floating Water-plantain) and the exposure of geologically important Cambrian rock sequences. The Arctic charr population is one of only three naturally occurring populations in Wales and one of the southernmost in the UK. There has been concern in relation to the declining Arctic charr population in Llyn Padarn and the potential impact of the water quality of the lake on the population. This study was undertaken to investigate potential spawning areas in the lake for Arctic charr by a SCUBA diving survey. Knowledge of the location of the spawning grounds of charr in Llyn Padarn is important to inform management of the site for conservation of the species. The purpose of this data capture was to collected information so that any additional spawning grounds (to the one location known) could be identified along with any potentially important spawning sites.

Identification

Dynodydd
Identifier
NRW_DS114451
Laith Metadata
Metadata Language
English
Lineage

The scuba dive survey of the shoreline was then undertaken on the 15th of December 2010 by four divers, operating in pairs. The zodiac inflatable boat was launched from SH57376086 and the lake surveyed anti-clockwise. Generally the shore areas were investigated at 6 sites around the lake to a maximum depth of 8m. The known spawning area in Afon y Bala was also investigated. Areas considered as potential redds and the general substrate were photographed. The project objects were as follows: 1. Undertake a scuba dive survey in Llyn Padarn in December 2010. 2. Collect any charr eggs found for subsequent identification. 3. Record any potential charr spawning areas. 4. Record the substrate material at survey locations. Repeat footage was taken in 2011
Additional Information

Thomas, Rh. & Holt, R 2011 Diver observations on Arctic charr (Salvelinus alpinus L.) spawning grounds in Llyn Padarn SSSI. CCW Staff Science Report No. 11/8/2. 28pp.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2011-08-31
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Countryside Council for Wales (CCW). Marine and Freshwater Ecosystems Group -
Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://www.ccw.gov.uk
 

Extent

Extent

Hyd
Geographic Extent
GWYNEDD - GWYNEDD
Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword
water column
 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Documents ( )

    Specification

    [A] The final report in Microsoft Word and Adobe PDF [B] A MapInfo GIS layer on which the maps and text in the report are based plus a series of video and still images. [C] An Excel spreadsheet contains summary data

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

The scuba dive survey of the shoreline was then undertaken on the 15th of December 2010 by four divers, operating in pairs. The zodiac inflatable boat was launched from SH57376086 and the lake surveyed anti-clockwise. Generally the shore areas were investigated at 6 sites around the lake to a maximum depth of 8m. The known spawning area in Afon y Bala was also investigated. Areas considered as potential redds and the general substrate were photographed. The project objects were as follows: 1. Undertake a scuba dive survey in Llyn Padarn in December 2010. 2. Collect any charr eggs found for subsequent identification. 3. Record any potential charr spawning areas. 4. Record the substrate material at survey locations. Repeat footage was taken in 2011
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • Arctic charr
  • salvelinus alpinus
  • aquatic ecology
  • Llyn Padarn
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2025-01-08
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Diver observations on arctic charr salvelinus alpinus L. spawning grounds in Llyn Padarn SSSI
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
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

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW 2011 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

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313134343531 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-03-03T15:26:59.121Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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