Data

Towed Video - Benthic survey of Douglas Shoal (17-Apr-2010 - 18-Apr-2010 )

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/4114732b-8a5e-4536-944a-df162b71f29d&rft.title=Towed Video - Benthic survey of Douglas Shoal (17-Apr-2010 - 18-Apr-2010 )&rft.identifier=https://apps.aims.gov.au/metadata/view/4114732b-8a5e-4536-944a-df162b71f29d&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=This data consists of 5097 records derived from 8 tows covering 16.692 km at 3.27m resolution, over a depth range of 7.7 to 22.0 meters. Classification of the benthos and substrate was based on 17 benthic classes and 6 substrate classes. Summary of the primary benthic categories recorded Macroalgae and Filter feeders 32.29% Hard Coral 7.10% Macroalgae 50.95% NoBenthos 9.65% Summary of substrates recorded Rubble 1.39% Grounding 8.10% Sand 5.47% Limestone 85.03% A custom interface has been developed by AIMS staff for reading Towed Video tapes.Maintenance and Update Frequency: asNeededStatement: Statement: Sea surface conditions and strong currents due to spring tides, made it difficult to maintain a Towvid course in the prevailing sea conditions and resulted in a meandering track intersecting the known positions of the Shen Neng 1.The visual imagery of the benthic habitat was captured using a 1/3 inch single CCD colour video camera mounted on a tow frame and controlled by a winch with 320 m of electromechanical cable. The video signal was recorded on a shipboard miniDV tape recorder. In addition to the visual imagery, the miniDV tape recorder received GPS and sounder data (latitude and longitude, ground speed, true heading, date, depth and time), which was recorded on the audio track. The computer-based application developed by AIMS for the analysis of tapes is described in:Speare PJ, Johansson C, Depczynski M, Meekan MG (2008) Marine habitats of Southern Melville Bay using towed video and aerial photography. Final Report to Charles Darwin University/Alcan Gove Pty Ltd. Australian Institute of Marine Science. 25 p.Substrate and benthic categories employed for towed video to classify the habitats and individual organisms recognised:Substrate Class (abiotic substrate components):GroundingLimestoneRubble (5-50mm)SandBenthos Class (overlying benthic organisms):Hard Coral, MediumHard Coral, SparseMacroalgae and Heterotrophs, MediumMacroalgae and Heterotrophs, SparseMacroalgae, DenseMacroalgae, MediumMacroalgae, SparseNo BenthosIndividual Organisms:Solitary CoralSea PenWreckageNoneThe 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=2025&rft.coverage=151.64406,-23.087351 151.64531,-23.08814 151.64712,-23.08935 151.647192,-23.090528 151.64406,-23.087351 151.647192,-23.090528 151.64712,-23.08935 151.64531,-23.08814 151.64406,-23.087351&rft.coverage=151.646586,-23.102732 151.64771,-23.10153 151.65088,-23.09932 151.65425,-23.09785 151.65744,-23.09692 151.65676,-23.09972 151.65365,-23.10136 151.65071,-23.10284 151.64873,-23.10369 151.648308,-23.103798 151.646586,-23.102732 151.648308,-23.103798 151.64873,-23.10369 151.65071,-23.10284 151.65365,-23.10136 151.65676,-23.09972 151.65744,-23.09692 151.65425,-23.09785 151.65088,-23.09932 151.64771,-23.10153 151.646586,-23.102732&rft.coverage=151.646719,-23.092476 151.64702,-23.09292 151.64893,-23.09395 151.65105,-23.09578 151.65301,-23.09676 151.65382,-23.09804 151.65665,-23.09848 151.65945,-23.09976 151.66141,-23.1007 151.661652,-23.10124 151.646719,-23.092476 151.661652,-23.10124 151.66141,-23.1007 151.65945,-23.09976 151.65665,-23.09848 151.65382,-23.09804 151.65301,-23.09676 151.65105,-23.09578 151.64893,-23.09395 151.64702,-23.09292 151.646719,-23.092476&rft.coverage=151.649414,-23.092792 151.64918,-23.09318 151.64815,-23.09474 151.64705,-23.09681 151.64698,-23.09878 151.64877,-23.10082 151.64964,-23.10305 151.649324,-23.103782 151.649414,-23.092792 151.649324,-23.103782 151.64964,-23.10305 151.64877,-23.10082 151.64698,-23.09878 151.64705,-23.09681 151.64815,-23.09474 151.64918,-23.09318 151.649414,-23.092792&rft.coverage=151.660173,-23.09959 151.65862,-23.09879 151.65514,-23.09834 151.65179,-23.09738 151.65005,-23.0945 151.64766,-23.09535 151.6467,-23.09768 151.64755,-23.09906 151.64856,-23.09927 151.6494,-23.10115 151.6497,-23.10279 151.649705,-23.103232 151.660173,-23.09959 151.649705,-23.103232 151.6497,-23.10279 151.6494,-23.10115 151.64856,-23.09927 151.64755,-23.09906 151.6467,-23.09768 151.64766,-23.09535 151.65005,-23.0945 151.65179,-23.09738 151.65514,-23.09834 151.65862,-23.09879 151.660173,-23.09959&rft.coverage=151.655443,-23.096546 151.65532,-23.09664 151.65409,-23.09763 151.65115,-23.09937 151.6482,-23.1008 151.647138,-23.101352 151.655443,-23.096546 151.647138,-23.101352 151.6482,-23.1008 151.65115,-23.09937 151.65409,-23.09763 151.65532,-23.09664 151.655443,-23.096546&rft.coverage=151.649845,-23.096655 151.65022,-23.0966 151.65144,-23.09597 151.652267,-23.095534 151.649845,-23.096655 151.652267,-23.095534 151.65144,-23.09597 151.65022,-23.0966 151.649845,-23.096655&rft.coverage=151.646411,-23.10339 151.6467,-23.10325 151.64885,-23.10213 151.65129,-23.10108 151.651661,-23.100836 151.646411,-23.10339 151.651661,-23.100836 151.65129,-23.10108 151.64885,-23.10213 151.6467,-23.10325 151.646411,-23.10339&rft_rights=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=The data was collected under contract between AIMS and another party(s). Specific agreements for access and use of the data shall be negotiated separately. Contact the AIMS Data Centre (adc@aims.gov.au) for further information&rft.type=dataset&rft.language=English Access the data
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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.

The data was collected under contract between AIMS and another party(s). Specific agreements for access and use of the data shall be negotiated separately. Contact the AIMS Data Centre (adc@aims.gov.au) for further information

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Brief description

This data consists of 5097 records derived from 8 tows covering 16.692 km at 3.27m resolution, over a depth range of 7.7 to 22.0 meters. Classification of the benthos and substrate was based on 17 benthic classes and 6 substrate classes. Summary of the primary benthic categories recorded Macroalgae and Filter feeders 32.29% Hard Coral 7.10% Macroalgae 50.95% NoBenthos 9.65% Summary of substrates recorded Rubble 1.39% Grounding 8.10% Sand 5.47% Limestone 85.03% A custom interface has been developed by AIMS staff for reading Towed Video tapes.

Lineage

Maintenance and Update Frequency: asNeeded
Statement: Statement: Sea surface conditions and strong currents due to spring tides, made it difficult to maintain a Towvid course in the prevailing sea conditions and resulted in a meandering track intersecting the known positions of the Shen Neng 1.The visual imagery of the benthic habitat was captured using a 1/3 inch single CCD colour video camera mounted on a tow frame and controlled by a winch with 320 m of electromechanical cable. The video signal was recorded on a shipboard miniDV tape recorder. In addition to the visual imagery, the miniDV tape recorder received GPS and sounder data (latitude and longitude, ground speed, true heading, date, depth and time), which was recorded on the audio track. The computer-based application developed by AIMS for the analysis of tapes is described in:Speare PJ, Johansson C, Depczynski M, Meekan MG (2008) Marine habitats of Southern Melville Bay using towed video and aerial photography. Final Report to Charles Darwin University/Alcan Gove Pty Ltd. Australian Institute of Marine Science. 25 p.Substrate and benthic categories employed for towed video to classify the habitats and individual organisms recognised:Substrate Class (abiotic substrate components):GroundingLimestoneRubble (5-50mm)SandBenthos Class (overlying benthic organisms):Hard Coral, MediumHard Coral, SparseMacroalgae and Heterotrophs, MediumMacroalgae and Heterotrophs, SparseMacroalgae, DenseMacroalgae, MediumMacroalgae, SparseNo BenthosIndividual Organisms:Solitary CoralSea PenWreckageNoneThe percentage cover of benthic communities was classified as follows:S - sparse (0 - 30% cover)M - medium (30 - 60%)D - dense (>60%)

Modified: 23 06 2025

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151.64831,-23.098287

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151.6534365,-23.098866

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151.6512905,-23.098949

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151.651056,-23.0960945

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151.649036,-23.102113

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