Sensitive Marine Habitats Data Derived from Stereo Baited Remote Underwater Video System (2012)

  • English
  • wel
  • All

This dataset was collected using Baited Remote Underwater Video Systems (BRUV). This was the first known study of its kind in temperate waters and involved extensive method development. The BRUV surveys collected information on fish assemblages over three sensitive habitats (kelp, seagrass meadows and horse mussels). Surveys took places in the coastal waters off North Wales (Llyn Peninsula) and South Wales (Pembrokeshire), within Special Areas of Conservation as designated under the EU Habitats Directive. BRUVs were used as a non-destructive and non-invasive method to assess fish communities within Wales. This project was aimed as investigating the fish species assemblages present in each habitat type and determine the age structure of these.

Identification

Dynodydd
Identifier
NRW_DS115272
Teitl Amgen
Alternative Title
  • Investigating sensitive marine habitats around Wales using Stereo Baited Remote Underwater Video Systems (BRUVs).
  • Data cynefinoedd morol sensitif a gafwyd drwy ddefnyddio system fideo danddwr o bell ag atyniad stereo (2012).
Laith Metadata
Metadata Language
English
Lineage

52 hours of footage were captured and fish assemblages were assess in three sensitive habitats; kelp (Laminaria digitata) , seagrass beds (Zostera marina, a UK BAP Priority Habitat) and horse mussels beds (Modiolus modiolus). BRUV systems were deployed for 2 and 6 hours in order to determine the optimum amount of time the BRUV needed to be deployed temperate waters. Calibrated stereo video cameras were used in order to make accurate length measurements of commercially important fish species. It took an average of 7 minutes for fish to first settle in front of the camera system and a total of 18 families including 15 different species were recorded from the three sensitive habitats. Different fish species assemblages were recorded in each of the different habitats with only poor cod (Trisopterus minutus) and dogfish (Scyliorhinadae) detected in all three habitats. The following questions were addressed with regards to the methodological approach. 1. Can BRUVs be used to investigate key ecological parameters within fish communities in temperate waters? a. Any problems of using these systems in temperate waters compared to tropical waters? b. Do amendments need to be performed to the systems to allow for sampling around the Welsh coast? c. What is the adequate amount of time a BRUV should be deployed for? 2. Do the specialised software packages produce accurate and reliable results when identifying and measuring the length of taxa in variable visibility? a. Does the shape or bend of a fish affect the length measurement? b. Which length measurement of a taxa produces the most reliable result? 3. Can we assess fish communities in three different types of sensitive habitats? a. Are there species or abundance differences between these habitats?
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2013-03-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Welsh Government
Cathays Park, Cardiff, CF10 3NQ
wales.gov.uk
 

Extent

Extent

Hyd
Geographic Extent
Irish Sea
Hyd
Geographic Extent
Tremadog Bay
Hyd
Geographic Extent
Cardigan Bay
Hyd
Geographic Extent
St. Brides Bay
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

    Data supplied as part of ERD grant [A] NRW Report and Marine Pollution Bulletin Article in .pdf format [B] List of deliverable species in .xls format [C] Fish species records, held in Appendix 3 in .pdf format [D] Video retained by Swansea University

 

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
Degree
false
Lineage

52 hours of footage were captured and fish assemblages were assess in three sensitive habitats; kelp (Laminaria digitata) , seagrass beds (Zostera marina, a UK BAP Priority Habitat) and horse mussels beds (Modiolus modiolus). BRUV systems were deployed for 2 and 6 hours in order to determine the optimum amount of time the BRUV needed to be deployed temperate waters. Calibrated stereo video cameras were used in order to make accurate length measurements of commercially important fish species. It took an average of 7 minutes for fish to first settle in front of the camera system and a total of 18 families including 15 different species were recorded from the three sensitive habitats. Different fish species assemblages were recorded in each of the different habitats with only poor cod (Trisopterus minutus) and dogfish (Scyliorhinadae) detected in all three habitats. The following questions were addressed with regards to the methodological approach. 1. Can BRUVs be used to investigate key ecological parameters within fish communities in temperate waters? a. Any problems of using these systems in temperate waters compared to tropical waters? b. Do amendments need to be performed to the systems to allow for sampling around the Welsh coast? c. What is the adequate amount of time a BRUV should be deployed for? 2. Do the specialised software packages produce accurate and reliable results when identifying and measuring the length of taxa in variable visibility? a. Does the shape or bend of a fish affect the length measurement? b. Which length measurement of a taxa produces the most reliable result? 3. Can we assess fish communities in three different types of sensitive habitats? a. Are there species or abundance differences between these habitats?
 

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
  • Video survey
  • Special Areas of Conservation (SAC) - SAC monitoring
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Habitat characterisation
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Adolygu)
Date (Revision)
2021-01-06
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

 

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

This data is jointly owned by NRW and Welsh Biodiversity Partnership, Ecosystem Resilience and Diversity, and the Welsh Government. 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 and Welsh Biodiversity Partnership, Ecosystem Resilience and Diversity, and the Welsh Government, 2014 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 and Welsh Biodiversity Partnership, Ecosystem Resilience and Diversity, and the Welsh Government copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313135323732 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:22:47.148Z
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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