Data

Towed Video - Benthic survey of Lihou Reef (10-Oct-2004 - 12-Oct-2004 )

Australian Institute of Marine Science
Australian Institute of Marine Science (AIMS)
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://apps.aims.gov.au/metadata/view/b4de9bf3-2041-4cd9-bb67-4bc271c96d78&rft.title=Towed Video - Benthic survey of Lihou Reef (10-Oct-2004 - 12-Oct-2004 )&rft.identifier=https://apps.aims.gov.au/metadata/view/b4de9bf3-2041-4cd9-bb67-4bc271c96d78&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=This data consists of 1865 records derived from 6 tows covering 5.125 km at 2.75m resolution, over a depth range of 45.6 to 59.9 meters. Classification of the benthos and substrate was based on 17 benthic classes and 6 substrate classes. Summary of the primary benthic categories recorded Hard Coral 10.45% Macroalgae 80.85% NoBenthos 5.36% Other 3.32% Summary of substrates recorded Rubble 0.37% NoSub 10.13% SandCoarse 89.49% A custom interface has been developed by AIMS staff for reading Towed Video tapes.Maintenance and Update Frequency: asNeededStatement: Statement: Towed video (Towvid) surveys focused on depths below 30m and into the deeper waters of the lagoon (70m on the chart). A vane-mounted and winch-controlled towed colour video camera provided visual images of the benthos to a shipboard tape recorder that was also recording GPS data (true position (WGS84), ground speed, true heading, date and time) and depth from the ships sounder. A computer based application for recording substrate, benthos and individual organisms was linked to these instruments to facilitate real-time georeferencing of all data points. Spatial resolution was ~3m at a nominal tow speed of 3km/h. C-MapTM vector charts and MaxseaTM electronic navigation software were used to monitor and record the ship's track and the depth.Substrate and benthic categories employed for towed video to classify the habitats and individual organisms recognised:Substrate (abiotic substrate components):Coarse SandRubble (5-50mm)No substrateOverlying Epibenthos:Live Reef CoralsAlgae, DenseAlgae, MediumAlgae, SparseBurrowing Animals (Bioturbated Mud)No BenthosIndividual Organisms:NoneThe percentage cover of benthic communities was classified as follows:S - sparse (0 - 30% cover)M - medium (30 - 60%)D - dense (>60%)&rft.creator=Australian Institute of Marine Science (AIMS) &rft.date=2024&rft.coverage=151.88653,-17.37795 151.88642,-17.3778 151.88572,-17.37722 151.88431,-17.37642 151.88291,-17.37582 151.88244,-17.37572 151.88653,-17.37795 151.88244,-17.37572 151.88291,-17.37582 151.88431,-17.37642 151.88572,-17.37722 151.88642,-17.3778 151.88653,-17.37795&rft.coverage=westlimit=151.888595; southlimit=-17.368343; eastlimit=151.891008; northlimit=-17.367693&rft.coverage=westlimit=151.888595; southlimit=-17.368343; eastlimit=151.891008; northlimit=-17.367693&rft.coverage=151.88582,-17.377995 151.88514,-17.37762 151.88372,-17.3769 151.88277,-17.37609 151.88179,-17.37562 151.881662,-17.375557 151.88582,-17.377995 151.881662,-17.375557 151.88179,-17.37562 151.88277,-17.37609 151.88372,-17.3769 151.88514,-17.37762 151.88582,-17.377995&rft.coverage=151.894465,-17.368488 151.89386,-17.36812 151.89227,-17.36716 151.89087,-17.36636 151.88813,-17.36698 151.88882,-17.36748 151.88986,-17.36641 151.88996,-17.36505 151.889903,-17.364603 151.894465,-17.368488 151.889903,-17.364603 151.88996,-17.36505 151.88986,-17.36641 151.88882,-17.36748 151.88813,-17.36698 151.89087,-17.36636 151.89227,-17.36716 151.89386,-17.36812 151.894465,-17.368488&rft.coverage=151.88964,-17.368403 151.88937,-17.3683 151.88795,-17.36847 151.88774,-17.36865 151.88751,-17.36724 151.88595,-17.36567 151.885182,-17.365407 151.88964,-17.368403 151.885182,-17.365407 151.88595,-17.36567 151.88751,-17.36724 151.88774,-17.36865 151.88795,-17.36847 151.88937,-17.3683 151.88964,-17.368403&rft.coverage=151.552785,-17.559058 151.55297,-17.55893 151.55372,-17.55817 151.55464,-17.55601 151.55454,-17.55384 151.55312,-17.55256 151.55165,-17.5515 151.55077,-17.55085 151.550673,-17.550788 151.552785,-17.559058 151.550673,-17.550788 151.55077,-17.55085 151.55165,-17.5515 151.55312,-17.55256 151.55454,-17.55384 151.55464,-17.55601 151.55372,-17.55817 151.55297,-17.55893 151.552785,-17.559058&rft_rights=Creative Commons Attribution-NonCommercial 3.0 Australia License http://creativecommons.org/licenses/by-nc/3.0/au/&rft_rights=Use Limitation: All AIMS data, products and services are provided as is and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.&rft_rights=Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: Australian Institute of Marine Science (AIMS). Towed Video - Benthic survey of Lihou Reef (10-Oct-2004 - 12-Oct-2004 ). https://apps.aims.gov.au/metadata/view/b4de9bf3-2041-4cd9-bb67-4bc271c96d78, accessed[date-of-access].&rft_subject=oceans&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution-NonCommercial 3.0 Australia License
http://creativecommons.org/licenses/by-nc/3.0/au/

Use Limitation: All AIMS data, products and services are provided "as is" and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.

Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: "Australian Institute of Marine Science (AIMS). Towed Video - Benthic survey of Lihou Reef (10-Oct-2004 - 12-Oct-2004 ). https://apps.aims.gov.au/metadata/view/b4de9bf3-2041-4cd9-bb67-4bc271c96d78, accessed[date-of-access]".

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Brief description

This data consists of 1865 records derived from 6 tows covering 5.125 km at 2.75m resolution, over a depth range of 45.6 to 59.9 meters. Classification of the benthos and substrate was based on 17 benthic classes and 6 substrate classes. Summary of the primary benthic categories recorded Hard Coral 10.45% Macroalgae 80.85% NoBenthos 5.36% Other 3.32% Summary of substrates recorded Rubble 0.37% NoSub 10.13% SandCoarse 89.49% A custom interface has been developed by AIMS staff for reading Towed Video tapes.

Lineage

Maintenance and Update Frequency: asNeeded
Statement: Statement: Towed video (Towvid) surveys focused on depths below 30m and into the deeper waters of the lagoon (70m on the chart). A vane-mounted and winch-controlled towed colour video camera provided visual images of the benthos to a shipboard tape recorder that was also recording GPS data (true position (WGS84), ground speed, true heading, date and time) and depth from the ships sounder. A computer based application for recording substrate, benthos and individual organisms was linked to these instruments to facilitate real-time georeferencing of all data points. Spatial resolution was ~3m at a nominal tow speed of 3km/h. C-MapTM vector charts and MaxseaTM electronic navigation software were used to monitor and record the ship's track and the depth.Substrate and benthic categories employed for towed video to classify the habitats and individual organisms recognised:Substrate (abiotic substrate components):Coarse SandRubble (5-50mm)No substrateOverlying Epibenthos:Live Reef CoralsAlgae, DenseAlgae, MediumAlgae, SparseBurrowing Animals (Bioturbated Mud)No BenthosIndividual Organisms:NoneThe percentage cover of benthic communities was classified as follows:S - sparse (0 - 30% cover)M - medium (30 - 60%)D - dense (>60%)

Modified: 17 10 2024

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151.88653,-17.37795 151.88642,-17.3778 151.88572,-17.37722 151.88431,-17.37642 151.88291,-17.37582 151.88244,-17.37572 151.88653,-17.37795

151.884485,-17.376835

151.89101,-17.36769 151.89101,-17.36834 151.8886,-17.36834 151.8886,-17.36769 151.89101,-17.36769

151.8898015,-17.368018

151.55279,-17.55906 151.55297,-17.55893 151.55372,-17.55817 151.55464,-17.55601 151.55454,-17.55384 151.55312,-17.55256 151.55165,-17.5515 151.55077,-17.55085 151.55067,-17.55079 151.55279,-17.55906

151.5526565,-17.554923

text: westlimit=151.888595; southlimit=-17.368343; eastlimit=151.891008; northlimit=-17.367693

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global : a8c43a0c-3e5d-4371-9c49-e26df717ebae

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