Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project)
Dataset: McMurdo Sound acoustic backscatter site Acoustic echosounder data were collected as part of an ecosystem study in McMurdo Sound, which is located at the southern extent of the Ross Sea in the Southern Ocean. The major goal of this multi-disciplinary project was to assess the influence of to...
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Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu
2018
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/9645 2023-05-15T13:48:31+02:00 Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) Daly, Kendra L. Saenz, Benjamin Kim, Stacy McMurdo Sound, Antarctica westlimit: 165.061085; southlimit: -77.7031864; eastlimit: 166.334829; northlimit: -77.5508 20141123 - 20150107 (UTC) 2018-03-19 https://hdl.handle.net/1912/9645 en_US eng Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu https://lod.bco-dmo.org/id/dataset/715512 https://hdl.handle.net/1912/9645 doi:10.1575/1912/bco-dmo.731147 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY doi:10.1575/1912/bco-dmo.731147 Acoustic Backscatter Krill Silverfish Echosounder McMurdo Sound SCINI ROV Dataset 2018 ftwhoas https://doi.org/10.1575/1912/bco-dmo.731147 2022-11-05T23:57:09Z Dataset: McMurdo Sound acoustic backscatter site Acoustic echosounder data were collected as part of an ecosystem study in McMurdo Sound, which is located at the southern extent of the Ross Sea in the Southern Ocean. The major goal of this multi-disciplinary project was to assess the influence of top−down forcing (predation) on pelagic zooplankton and fish. Stations were located along the fast ice edge, and along three transects into the fast ice along the eastern side of McMurdo Sound (Ross Island), in the middle of the Sound, and on the western side of the Sound. Krill and fish were sampled between 17 November 2014 – 1 January 2015, both acoustically and visually beneath the fast ice using the tethered SCINI ROV, which was deployed and operated through a 25 cm diameter hole drilled through the sea ice. SCINI contained cameras and thrusters, and towed a sensor package consisting of a WET Labs fluorometer (ECO-AFL/FL) and a single-beam Biosonics 120 kHz DT-X echosounder. Raw acoustic data were analyzed using Echoview software (version 5.3). All acoustic aggregations greater than 4 pings in width were manually delineated, and acoustic energy of the aggregations was integrated into bins of six seconds wide by 1 m in depth. These aggregations were classified as potentially krill or silverfish, based upon ROV visual identification of the targets or, where no visual targets were encountered, by comparing the aggregation target strength, shape, density, and texture and depth to a set of aggregations with positive visual classification. Visual targets were identified to the lowest taxon possible; these observations were used primarily to verify classification of acoustic signals. The echosounder operated at a nominal ping rate of 1 ping s-1; however, this rate was occasionally adjusted if false bottom signals were observed. The general profile of a dive included a surface transect of ~300 m horizontal distance, where the acoustic transducer faced downward, and also a dive to ~120 m if conditions allowed. Echogram ... Dataset Antarc* Antarctica McMurdo Sound Ross Island Ross Sea Sea ice Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) McMurdo Sound Ross Island Ross Sea Southern Ocean |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Acoustic Backscatter Krill Silverfish Echosounder McMurdo Sound SCINI ROV |
spellingShingle |
Acoustic Backscatter Krill Silverfish Echosounder McMurdo Sound SCINI ROV Daly, Kendra L. Saenz, Benjamin Kim, Stacy Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) |
topic_facet |
Acoustic Backscatter Krill Silverfish Echosounder McMurdo Sound SCINI ROV |
description |
Dataset: McMurdo Sound acoustic backscatter site Acoustic echosounder data were collected as part of an ecosystem study in McMurdo Sound, which is located at the southern extent of the Ross Sea in the Southern Ocean. The major goal of this multi-disciplinary project was to assess the influence of top−down forcing (predation) on pelagic zooplankton and fish. Stations were located along the fast ice edge, and along three transects into the fast ice along the eastern side of McMurdo Sound (Ross Island), in the middle of the Sound, and on the western side of the Sound. Krill and fish were sampled between 17 November 2014 – 1 January 2015, both acoustically and visually beneath the fast ice using the tethered SCINI ROV, which was deployed and operated through a 25 cm diameter hole drilled through the sea ice. SCINI contained cameras and thrusters, and towed a sensor package consisting of a WET Labs fluorometer (ECO-AFL/FL) and a single-beam Biosonics 120 kHz DT-X echosounder. Raw acoustic data were analyzed using Echoview software (version 5.3). All acoustic aggregations greater than 4 pings in width were manually delineated, and acoustic energy of the aggregations was integrated into bins of six seconds wide by 1 m in depth. These aggregations were classified as potentially krill or silverfish, based upon ROV visual identification of the targets or, where no visual targets were encountered, by comparing the aggregation target strength, shape, density, and texture and depth to a set of aggregations with positive visual classification. Visual targets were identified to the lowest taxon possible; these observations were used primarily to verify classification of acoustic signals. The echosounder operated at a nominal ping rate of 1 ping s-1; however, this rate was occasionally adjusted if false bottom signals were observed. The general profile of a dive included a surface transect of ~300 m horizontal distance, where the acoustic transducer faced downward, and also a dive to ~120 m if conditions allowed. Echogram ... |
format |
Dataset |
author |
Daly, Kendra L. Saenz, Benjamin Kim, Stacy |
author_facet |
Daly, Kendra L. Saenz, Benjamin Kim, Stacy |
author_sort |
Daly, Kendra L. |
title |
Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) |
title_short |
Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) |
title_full |
Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) |
title_fullStr |
Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) |
title_full_unstemmed |
Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) |
title_sort |
acoustic backscatter from sites in mcmurdo sound from 2014-2015 (mcmurdo predator prey project) |
publisher |
Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/9645 |
op_coverage |
McMurdo Sound, Antarctica westlimit: 165.061085; southlimit: -77.7031864; eastlimit: 166.334829; northlimit: -77.5508 20141123 - 20150107 (UTC) |
geographic |
McMurdo Sound Ross Island Ross Sea Southern Ocean |
geographic_facet |
McMurdo Sound Ross Island Ross Sea Southern Ocean |
genre |
Antarc* Antarctica McMurdo Sound Ross Island Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctica McMurdo Sound Ross Island Ross Sea Sea ice Southern Ocean |
op_source |
doi:10.1575/1912/bco-dmo.731147 |
op_relation |
https://lod.bco-dmo.org/id/dataset/715512 https://hdl.handle.net/1912/9645 doi:10.1575/1912/bco-dmo.731147 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1575/1912/bco-dmo.731147 |
_version_ |
1766249386484957184 |