Llyn Tegid Hydroacoustic Surveys (2014)
The gwyniad (Coregonus lavaretus) population of Llyn Tegid has been considered for a number of years to be threatened by deteriorating environmental conditions, especially those associated with eutrophication. This dataset contains the results of a project undertaken in 2014 to carry out a hydroacoustic survey and measurement of environmental variables. The purpose of this data capture was to assess the status of gwyniad and its habitat in Llyn Tegid.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS115866
- Teitl Amgen
-
- Arolwg Hydroacwstig Llyn Tegid (2014)
- Laith Metadata
- English
- Datganiad
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Carried out hydroacoustic survey and the measurement of associated environmental variables (temperature and oxygen profiles, and secchi disk reading). Utilised standardised survey and monitoring protocol for the assessment of whitefish, with two minor deviations. Rather than using the target strength to fish length relationship of Foote (1987) the relationship given by Love (1971) was used to allow wider comparison. Secondly a vessel speed of 2.0 meters per section was adopted as general target mean speed rather than an absolute upper limit. The objectives of the present project were to collect and analyse hydroacoustic survey and associated environmental data during the summer of 2014, to interpret them with respect to similar data from earlier years, and to consider their implications for the current status of the gwyniad and its habitat in Llyn Tegid.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2015-01-31
Rhychwant
Rhychwant
- Hyd
- GWYNEDD - GWYNEDD
))
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Documents
()
- Math
-
Archive Project Number 227 Media 1519 [A] A report in .doc and .pdf format [B] Echoview Data Supplied as Comma Separated Value format files (*.csv). August 2014 [C] Oxygen profiles, temperature profiles in .xls format [D] Visual acquisition raw data (*.dt4 format) derived from the echo sounder Visual Acquisition Version 5.0.4 - proprietary software would be required to view or analyse this data. [E] Species abundance in .xls format. This will also be entered into Recorder 6
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Documents
()
Ansawdd
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
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This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Gradd
- false
- Datganiad
-
Carried out hydroacoustic survey and the measurement of associated environmental variables (temperature and oxygen profiles, and secchi disk reading). Utilised standardised survey and monitoring protocol for the assessment of whitefish, with two minor deviations. Rather than using the target strength to fish length relationship of Foote (1987) the relationship given by Love (1971) was used to allow wider comparison. Secondly a vessel speed of 2.0 meters per section was adopted as general target mean speed rather than an absolute upper limit. The objectives of the present project were to collect and analyse hydroacoustic survey and associated environmental data during the summer of 2014, to interpret them with respect to similar data from earlier years, and to consider their implications for the current status of the gwyniad and its habitat in Llyn Tegid.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
-
- Llyn Tegid
- gwyniad (freshwater whitefish)
- coregonus lavaretus
- hydroacoustic
- marine and freshwater inventory
- sechi disc
- oxygen profile
- temperature profile
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
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Llyn Tegid hydroacoustic survey 2014
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
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There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
© 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
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313135383636 XML
- Laith Metadata
- English
- Dynodydd Rhiant
-
Llyn Tegid Hydroacoustic Surveys and Gwyniad Translocations 2004-2009
NRW_DS101834
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2025-03-07T17:24:14.187Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0