FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic
In February 2019, seamounts of the Discovery Rise, SE Atlantic (41–45°S, 3°W - 3°E), were explored in support of the application of the Ecosystem Approach to Fisheries Management in the Southeast Atlantic Fisheries Organization (SEAFO) Convention Area. Video records of the seafloor were produced by...
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ftcsic:oai:digital.csic.es:10261/324404 2024-02-11T09:57:03+01:00 FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic Pérez, J.A.A. Sarralde-Vizuete, Roberto Ramil, F. Castillo, Sara 2022-08-05 http://hdl.handle.net/10508/15684 http://hdl.handle.net/10261/324404 https://doi.org/10.1016/j.dsr.2022.103849 en eng Centro Oceanográfico de Vigo AM https://www.sciencedirect.com/science/article/pii/S0967063722001613?via%3Dihub Deep Sea Research Part I: Oceanographic Research Papers, 188. 2022: 103849-103849 0967-0637 http://hdl.handle.net/10508/15684 http://hdl.handle.net/10261/324404 https://doi.org/10.1016/j.dsr.2022.103849 50019 open Centro Oceanográfico de Vigo Pesquerías Southeast atlantic Seamounts Deep sea fish Cephalopods research article 2022 ftcsic https://doi.org/10.1016/j.dsr.2022.103849 2024-01-16T11:47:30Z In February 2019, seamounts of the Discovery Rise, SE Atlantic (41–45°S, 3°W - 3°E), were explored in support of the application of the Ecosystem Approach to Fisheries Management in the Southeast Atlantic Fisheries Organization (SEAFO) Convention Area. Video records of the seafloor were produced by the Video-Assisted Multisampler System (VAMS) along 15 valid transects conducted in plateau and flank areas of Shannon, Tablemount, Discovery and Heardman seamounts at depths ranging from 394 to 1839 m. Nine benthic seascapes were classified and described based on substrate hardness, texture, slope, physical and biological modifiers as observed in the video images. Predominant water masses were estimated from temperature, salinity and dissolved oxygen vertical profiles obtained by CTD casts in the vicinity of each transect. A total of 366 fishes were seen (total observation time = 25.0 h) and classified in 32 morphotypes, included in 9 orders and 12 families. Most fish morphotypes (14) were included in the Macrouridae family. Family Moridae, on the other hand, included 65.3% of all fish records (239), with two particularly abundant morphotypes: Laemonema sp. (116) and Guttigadus sp. (92). Thirteen cephalopods were observed and classified in five morphotypes; the oegopsid squid Moroteuthopsis ingens was the most abundant of them (6). Despite the taxonomic uncertainties associated with video identifications, the explored region was found to contain a mixture of tropical – subtropical and subantarctic faunas of the Atlantic. Similarities of fauna composition and non-directional beta diversity estimates revealed some degree of seamount identity, but 57.5–61.9% of morphotypes were shared among seamounts (Jaccard = 0.425, Sørensen = 0.381). Fishes and cephalopods were more frequently observed on the shallower plateau areas under the influence of warmer and more oxygenated Antarctic Intermediate Waters. Depth and related factors did not influence richness, but dissimilarities in fauna composition between video transects ... Article in Journal/Newspaper Antarc* Antarctic Digital.CSIC (Spanish National Research Council) Antarctic Deep Sea Research Part I: Oceanographic Research Papers 188 103849 |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Centro Oceanográfico de Vigo Pesquerías Southeast atlantic Seamounts Deep sea fish Cephalopods |
spellingShingle |
Centro Oceanográfico de Vigo Pesquerías Southeast atlantic Seamounts Deep sea fish Cephalopods Pérez, J.A.A. Sarralde-Vizuete, Roberto Ramil, F. Castillo, Sara FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic |
topic_facet |
Centro Oceanográfico de Vigo Pesquerías Southeast atlantic Seamounts Deep sea fish Cephalopods |
description |
In February 2019, seamounts of the Discovery Rise, SE Atlantic (41–45°S, 3°W - 3°E), were explored in support of the application of the Ecosystem Approach to Fisheries Management in the Southeast Atlantic Fisheries Organization (SEAFO) Convention Area. Video records of the seafloor were produced by the Video-Assisted Multisampler System (VAMS) along 15 valid transects conducted in plateau and flank areas of Shannon, Tablemount, Discovery and Heardman seamounts at depths ranging from 394 to 1839 m. Nine benthic seascapes were classified and described based on substrate hardness, texture, slope, physical and biological modifiers as observed in the video images. Predominant water masses were estimated from temperature, salinity and dissolved oxygen vertical profiles obtained by CTD casts in the vicinity of each transect. A total of 366 fishes were seen (total observation time = 25.0 h) and classified in 32 morphotypes, included in 9 orders and 12 families. Most fish morphotypes (14) were included in the Macrouridae family. Family Moridae, on the other hand, included 65.3% of all fish records (239), with two particularly abundant morphotypes: Laemonema sp. (116) and Guttigadus sp. (92). Thirteen cephalopods were observed and classified in five morphotypes; the oegopsid squid Moroteuthopsis ingens was the most abundant of them (6). Despite the taxonomic uncertainties associated with video identifications, the explored region was found to contain a mixture of tropical – subtropical and subantarctic faunas of the Atlantic. Similarities of fauna composition and non-directional beta diversity estimates revealed some degree of seamount identity, but 57.5–61.9% of morphotypes were shared among seamounts (Jaccard = 0.425, Sørensen = 0.381). Fishes and cephalopods were more frequently observed on the shallower plateau areas under the influence of warmer and more oxygenated Antarctic Intermediate Waters. Depth and related factors did not influence richness, but dissimilarities in fauna composition between video transects ... |
format |
Article in Journal/Newspaper |
author |
Pérez, J.A.A. Sarralde-Vizuete, Roberto Ramil, F. Castillo, Sara |
author_facet |
Pérez, J.A.A. Sarralde-Vizuete, Roberto Ramil, F. Castillo, Sara |
author_sort |
Pérez, J.A.A. |
title |
FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic |
title_short |
FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic |
title_full |
FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic |
title_fullStr |
FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic |
title_full_unstemmed |
FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic |
title_sort |
fish, cephalopods and associated habitats of the discovery rise seamounts, southeast atlantic |
publishDate |
2022 |
url |
http://hdl.handle.net/10508/15684 http://hdl.handle.net/10261/324404 https://doi.org/10.1016/j.dsr.2022.103849 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Centro Oceanográfico de Vigo AM https://www.sciencedirect.com/science/article/pii/S0967063722001613?via%3Dihub Deep Sea Research Part I: Oceanographic Research Papers, 188. 2022: 103849-103849 0967-0637 http://hdl.handle.net/10508/15684 http://hdl.handle.net/10261/324404 https://doi.org/10.1016/j.dsr.2022.103849 50019 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.dsr.2022.103849 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
188 |
container_start_page |
103849 |
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1790608124766322688 |