Bangor University School of Ocean Science (SOS) Prince Madog Towed Video Survey in Cardigan Bay (2013)
Surveys of seabed in Cardigan Bay, carried out by the School of Ocean Sciences (SOS), Bangor University, in July 2013, as part of European Fisheries Fund (EFF) funded research into fisheries and seabed habitats. This dataset is derived only from drop-down video (42 tows (24 in Work Package 1b and 18 in Work Package 2b) and associated still images collected by SOS from the RV Prince Madog, using a sledge with combined video cameras and stills camera. The survey area was between 2 and 22 km offshore of the coast between Cardigan and New Quay. The tow lengths ranged from 160m to 1800m and seabed consisted primarily of sands, gravels and pebbles with some areas of cobbles and boulders. 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. The aim of the subsequent data capture was to improve CCW's seabed habitat mapping for Cardigan Bay and assign biotopes.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS115572
- Alternative Title
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- 2013 DRAFT Bangor University SOS Prince Madog Towed Video Survey in Cardigan Bay, July (Part B) MRCCW31600000010
- 2013 DRAFT Bangor University SOS Prince Madog Towed Video Survey in Cardigan Bay, July (Part A) MRCCW31600000011
- Arolwg Fideo Llusg SOS Prince Madog Prifysgol Bangor ym Mae Ceredigion, 2013
- Metadata Language
- English
- Lineage
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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. Stills camera images are .JPG files. The arrangement of the videos and cameras is described below: - The middle width of the GoPro videos is about 96cm 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.
- Additional Information
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Dr Gwladys Lambert, School of Ocean Sciences, Bangor University. Related Titles: 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. Albrecht, J. K. (2013). Taxonomic and functional recovery of epifauna after the permanent closure of an area of the Cardigan Bay Special Area of Conservation (SAC), Wales, to a scallop dredge fishery. MSc thesis, Bangor University, Fisheries and Conservation report No. 28, Pp.81
- Dataset Reference Date (Publication)
- 2013-12-31
Extent
Extent
- Geographic Extent
- SIR CEREDIGION - CEREDIGION
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Vertical Extent
- Medin Extent Keyword
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benthic boundary layer
Distribution
- Format Type and Description
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Image
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- Specification
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[A] Digital videos in .VOB and .MP4 files (the latter from the GoPro camera). [B] Still images in .JPG files. [C] Field logs of dates, start and end positions (Lat/Long) and times for tows etc in Excel spreadsheets. [D] Analysis data (by CALM) in Excel spreadsheets [E] Marine Recorder (NBN) datafile. Marine Recorder Survey keys: MRCCW31600000010 and MRCCW31600000011
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Image
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Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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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. Stills camera images are .JPG files. The arrangement of the videos and cameras is described below: - The middle width of the GoPro videos is about 96cm 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.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- Video survey
- benthic marine habitats
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Habitat characterisation
- Zoobenthos taxonomic abundance
- Seabed photography
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
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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: This species data is wholly owned by Natural Resources Wales (NRW). There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
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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
- File Identifier
- 4f4c4942-4343-5764-6473-313135353732 XML
- Metadata Language
- English
- Parent Identifier
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Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:31:42.339Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0