Bangor University School of Ocean Science (SOS) Prince Madog Towed Video Survey in Liverpool Bay (2013)

  • English
  • wel
  • All

Surveys of seabed in Liverpool Bay, carried out by the School of Ocean Sciences (SOS), Bangor University, in August 2013, as part of European Fisheries Fund (EFF) funded research into fisheries and seabed habitats. This dataset is derived only from drop-down video (9 tows) collected by SOS from the RV Prince Madog, using a sledge with combined video cameras and stills camera. The survey area was between 8 and 27 km offshore, north of Bangor to Colwyn Bay. The tow lengths ranged from 216 m to 611 m and seabed consisted primarily of sands and gravels with some areas of pebbes. The videos were analysed by Coastal Assessment, Liaison and Monitoring (CALM) to describe the seabed habitats and communities and assign them to biotopes. The main aim of the survey work by the School of Ocean Sciences was to assess the characteristics and status of offshore benthic habitats, as part of a study on the effects of scallop dredging.

Identification

Dynodydd
Identifier
NRW_DS115574
Teitl Amgen
Alternative Title
  • 2013 DRAFT Bangor University SOS Prince Madog Towed Video Survey Liverpool Bay, August MRCCW31600000014
  • Arolwg Fideo Llusg SOS Prince Madog Prifysgol Bangor ym Mae Lerpwl, 2013
Laith Metadata
Metadata Language
English
Lineage

Drop-down video tows were carried out with various combinations of a standard resolution digital video camera, a GoPro video camera and a stills camera attached to a sledge towed behind RV Prince Madog. Standard video was recorded onto .VOB files. GoPro video footage was recorded onto MP4 files. No stills images were collected for this survey. The arrangement of the videos and cameras is described below: The middle width of the GoPro videos is about 96 cm for the ones that are at an angle (80 at the bottom and >112 at the top) while the ones which face straight down are 80 cm wide. The still camera is a Canon 400D, with field of view of ca. 0.13m2 (44cm by 30cm). The middle width of the videos on the CDs are 41cm. A manual log was kept of the position and time at the start and end of transect while the camera was on the bottom. Videos and images were analysed by a marine biological surveyor (Jen Jones) to record information on habitat character, conspicuous species and their abundance. Habitat descriptions and assignment of biotopes from the national biotope classification to each record were also recorded. Analysis included a QA process to validate and verify the recorded data. The surveys are part of a 3-year EFF funded project on habitat mapping and effects of fisheries, particularly scallop dredging. Part of this dataset is sensitive and restricted. The sensitive data is as follows: Pecten maximus and Aequipecten opercularis.
Additional Information

Related Title: Lambert, G.I., Murray L.G., Kaiser M.J., Salomonsen H., Cambie, G. (2013) Welsh waters scallop survey - Cardigan Bay to Liverpool Bay July - August 2013. Bangor University, Fisheries and Conservation Report No. 30. Bangor University.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2013-12-31
Perchennog
Owner
  University of Wales, Bangor. School of Ocean Sciences -
Bangor, Gwynedd, LL57 2DG
http://www.bangor.ac.uk
Cychwynnwr
Originator
  Coastal Assessment Liaison and Monitoring (CALM) -
Ti Cara, Point Lane, Cosheston, Pembrokeshire, SA72 4UN, Wales
<!--No website -->
 

Extent

Extent

Hyd
Geographic Extent
CONWY - CONWY
Hyd
Geographic Extent
SIR YNYS MON - ISLE OF ANGLESEY
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

benthic boundary layer
 
 

Distribution

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

    Specification

    [A] Digital videos in .VOB and .MP4 files (the latter from the GoPro camera); [B] Field logs of dates, start and end positions (Lat/Long) and times for tows etc in Excel spreadsheets; [C] Analysis data (by CALM) in Excel spreadsheets and Marine Recorder (NBN) datafile. Marine Recorder Survey key: MRCCW31600000014

 

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

Drop-down video tows were carried out with various combinations of a standard resolution digital video camera, a GoPro video camera and a stills camera attached to a sledge towed behind RV Prince Madog. Standard video was recorded onto .VOB files. GoPro video footage was recorded onto MP4 files. No stills images were collected for this survey. The arrangement of the videos and cameras is described below: The middle width of the GoPro videos is about 96 cm for the ones that are at an angle (80 at the bottom and >112 at the top) while the ones which face straight down are 80 cm wide. The still camera is a Canon 400D, with field of view of ca. 0.13m2 (44cm by 30cm). The middle width of the videos on the CDs are 41cm. A manual log was kept of the position and time at the start and end of transect while the camera was on the bottom. Videos and images were analysed by a marine biological surveyor (Jen Jones) to record information on habitat character, conspicuous species and their abundance. Habitat descriptions and assignment of biotopes from the national biotope classification to each record were also recorded. Analysis included a QA process to validate and verify the recorded data. The surveys are part of a 3-year EFF funded project on habitat mapping and effects of fisheries, particularly scallop dredging. Part of this dataset is sensitive and restricted. The sensitive data is as follows: Pecten maximus and Aequipecten opercularis.
 

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
  • benthic marine habitats
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
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Adolygu)
Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

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

Video Footage and Images: This dataset is wholly owned by School of Ocean Sciences, Bangor University. Enquirers are advised to obtain a copy from the owner/originator directly, rather than NRW. NRW may NOT publish or disseminate it in its entirety. Species Data: Species data is owned by Natural Resources Wales (NRW). There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

Video Footage and Images: © School of Ocean Sciences, Bangor University. NRW does NOT grant permission to third parties to re-use or disseminate this dataset. Species Data: © 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 copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313135353734 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder

NRW_DS114501
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-03-03T14:33:47.35Z
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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