The Challenge to Observe Antarctic Toothfish (<i>Dissostichus mawsoni</i>) Under Fast Ice
In situ observation of Antarctic toothfish (<i>Dissostichus mawsoni</i>) is challenging as they typically live at depths greater than 500 m, in dark and ice-covered Antarctic waters. Searching for adequate methodologies to survey Antarctic toothfish in their habitat, we tested a miniatur...
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doaj-1149debe2d18422080a0fba11b0a196f2021-04-02T21:37:51ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-02-01925525510.3390/jmse9030255The Challenge to Observe Antarctic Toothfish (<i>Dissostichus mawsoni</i>) Under Fast IceDavide Di Blasi0Simonepietro Canese1Erica Carlig2Steven J. Parker3Eva Pisano4Marino Vacchi5Laura Ghigliotti6Institute for the Study of Anthropic Impacts and Sustainability in Marine Environment—National Research Council, via De Marini 6, 16149 Genoa, ItalyStazione Zoologica Anthon Dohrn, 80100 Naples, ItalyInstitute for the Study of Anthropic Impacts and Sustainability in Marine Environment—National Research Council, via De Marini 6, 16149 Genoa, ItalyNational Institute of Water and Atmospheric Research Ltd, 7010 Nelson, New ZealandInstitute for the Study of Anthropic Impacts and Sustainability in Marine Environment—National Research Council, via De Marini 6, 16149 Genoa, ItalyInstitute for the Study of Anthropic Impacts and Sustainability in Marine Environment—National Research Council, via De Marini 6, 16149 Genoa, ItalyInstitute for the Study of Anthropic Impacts and Sustainability in Marine Environment—National Research Council, via De Marini 6, 16149 Genoa, ItalyIn situ observation of Antarctic toothfish (<i>Dissostichus mawsoni</i>) is challenging as they typically live at depths greater than 500 m, in dark and ice-covered Antarctic waters. Searching for adequate methodologies to survey Antarctic toothfish in their habitat, we tested a miniaturized Baited Remote Underwater Video camera (BRUV), deployed through holes drilled in the sea ice in the Ross Sea region, over three field seasons. In 2015 three BRUVs were deployed at McMurdo Sound, and paired with a vertical longline sampling. In 2017, three opportunistic deployments were performed at Terra Nova Bay. In 2018 seven deployments at Terra Nova Bay provided preliminary data on the habitat preferences of the species. The design and configuration of the mini-BRUV allowed to collect high-quality video imagery of 60 Antarctic toothfish in 13 deployments from the fast sea ice. The behaviour of fish at the bait, intra-species interactions, and potential biases in individual counting were investigated, setting baselines for future studies on the abundance and distribution of Antarctic toothfish in sea-ice covered areas. This work represents the first step towards the development of protocols for non-extractive monitoring of the Antarctic toothfish in the high-Antarctica coastal shelf areas, of great value in the Ross Sea region where the largest MPA of the world has recently been established.https://www.mdpi.com/2077-1312/9/3/255BRUVRoss Seavideo samplingAntarctica |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Davide Di Blasi Simonepietro Canese Erica Carlig Steven J. Parker Eva Pisano Marino Vacchi Laura Ghigliotti |
spellingShingle |
Davide Di Blasi Simonepietro Canese Erica Carlig Steven J. Parker Eva Pisano Marino Vacchi Laura Ghigliotti The Challenge to Observe Antarctic Toothfish (<i>Dissostichus mawsoni</i>) Under Fast Ice Journal of Marine Science and Engineering BRUV Ross Sea video sampling Antarctica |
author_facet |
Davide Di Blasi Simonepietro Canese Erica Carlig Steven J. Parker Eva Pisano Marino Vacchi Laura Ghigliotti |
author_sort |
Davide Di Blasi |
title |
The Challenge to Observe Antarctic Toothfish (<i>Dissostichus mawsoni</i>) Under Fast Ice |
title_short |
The Challenge to Observe Antarctic Toothfish (<i>Dissostichus mawsoni</i>) Under Fast Ice |
title_full |
The Challenge to Observe Antarctic Toothfish (<i>Dissostichus mawsoni</i>) Under Fast Ice |
title_fullStr |
The Challenge to Observe Antarctic Toothfish (<i>Dissostichus mawsoni</i>) Under Fast Ice |
title_full_unstemmed |
The Challenge to Observe Antarctic Toothfish (<i>Dissostichus mawsoni</i>) Under Fast Ice |
title_sort |
challenge to observe antarctic toothfish (<i>dissostichus mawsoni</i>) under fast ice |
publisher |
MDPI AG |
series |
Journal of Marine Science and Engineering |
issn |
2077-1312 |
publishDate |
2021-02-01 |
description |
In situ observation of Antarctic toothfish (<i>Dissostichus mawsoni</i>) is challenging as they typically live at depths greater than 500 m, in dark and ice-covered Antarctic waters. Searching for adequate methodologies to survey Antarctic toothfish in their habitat, we tested a miniaturized Baited Remote Underwater Video camera (BRUV), deployed through holes drilled in the sea ice in the Ross Sea region, over three field seasons. In 2015 three BRUVs were deployed at McMurdo Sound, and paired with a vertical longline sampling. In 2017, three opportunistic deployments were performed at Terra Nova Bay. In 2018 seven deployments at Terra Nova Bay provided preliminary data on the habitat preferences of the species. The design and configuration of the mini-BRUV allowed to collect high-quality video imagery of 60 Antarctic toothfish in 13 deployments from the fast sea ice. The behaviour of fish at the bait, intra-species interactions, and potential biases in individual counting were investigated, setting baselines for future studies on the abundance and distribution of Antarctic toothfish in sea-ice covered areas. This work represents the first step towards the development of protocols for non-extractive monitoring of the Antarctic toothfish in the high-Antarctica coastal shelf areas, of great value in the Ross Sea region where the largest MPA of the world has recently been established. |
topic |
BRUV Ross Sea video sampling Antarctica |
url |
https://www.mdpi.com/2077-1312/9/3/255 |
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