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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ftieo:oai:repositorio.ieo.es:10508/15684 2023-05-15T14:00:17+02:00 FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic Pérez, J.A.A. Sarralde-Vizuete, R. (Roberto) Ramil, F. Castillo, S. (Sara) 2022-08-05 http://hdl.handle.net/10508/15684 https://doi.org/10.1016/j.dsr.2022.103849 eng eng Centro Oceanográfico de Vigo https://www.sciencedirect.com/science/article/pii/S0967063722001613?via%3Dihub 0967-0637 http://hdl.handle.net/10508/15684 Deep Sea Research Part I: Oceanographic Research Papers, 188. 2022: 103849-103849 https://doi.org/10.1016/j.dsr.2022.103849 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access CC-BY-NC-ND Southeast atlantic Seamounts Deep sea fish Cephalopods research article AM 2022 ftieo https://doi.org/10.1016/j.dsr.2022.103849 2023-01-25T00:48:07Z 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 Instituto Español de Oceanografía: e-IEO Antarctic Deep Sea Research Part I: Oceanographic Research Papers 188 103849 |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
Southeast atlantic Seamounts Deep sea fish Cephalopods |
spellingShingle |
Southeast atlantic Seamounts Deep sea fish Cephalopods Pérez, J.A.A. Sarralde-Vizuete, R. (Roberto) Ramil, F. Castillo, S. (Sara) FISH, cephalopods and associated habitats of the Discovery rise seamounts, Southeast Atlantic |
topic_facet |
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, R. (Roberto) Ramil, F. Castillo, S. (Sara) |
author_facet |
Pérez, J.A.A. Sarralde-Vizuete, R. (Roberto) Ramil, F. Castillo, S. (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 |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
2022 |
url |
http://hdl.handle.net/10508/15684 https://doi.org/10.1016/j.dsr.2022.103849 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://www.sciencedirect.com/science/article/pii/S0967063722001613?via%3Dihub 0967-0637 http://hdl.handle.net/10508/15684 Deep Sea Research Part I: Oceanographic Research Papers, 188. 2022: 103849-103849 https://doi.org/10.1016/j.dsr.2022.103849 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access |
op_rightsnorm |
CC-BY-NC-ND |
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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1766269328845438976 |