Caracterización acústica de las agregaciones de krill (Euphausia superba) detectadas automáticamente en el Estrecho de Bransfield e Isla Elefante
This study shows the characterization of krill (Euphausia superba) aggregations identified in the Bransfield Strait and around of Elephant Island. Data were collected using a multifrequency SIMRAD EK80 echosounder during three austral summers: 2018, 2019 and 2020. For detection of krill aggregations...
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Format: | Article in Journal/Newspaper |
Language: | Spanish |
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2022
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Online Access: | https://dialnet.unirioja.es/servlet/oaiart?codigo=8808992 |
id |
ftdialnet:oai:dialnet.unirioja.es:ART0001580511 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Dialnet - Portada de revistas (Universidad de La Rioja) |
op_collection_id |
ftdialnet |
language |
Spanish |
topic |
Hydroacoustic aggregations Antarctic multifrequency echosounder SIMRAD EK80 biostatistics Hidroacústica agregaciones Antártida ecosonda multifrecuencia SIMRAD EK80 bioestadística |
spellingShingle |
Hydroacoustic aggregations Antarctic multifrequency echosounder SIMRAD EK80 biostatistics Hidroacústica agregaciones Antártida ecosonda multifrecuencia SIMRAD EK80 bioestadística Valdez, Carlos Grados, Grados La Cruz, Luis Cuadros, Gustavo Cornejo, Rodolfo Castillo León, Ramiro Caracterización acústica de las agregaciones de krill (Euphausia superba) detectadas automáticamente en el Estrecho de Bransfield e Isla Elefante |
topic_facet |
Hydroacoustic aggregations Antarctic multifrequency echosounder SIMRAD EK80 biostatistics Hidroacústica agregaciones Antártida ecosonda multifrecuencia SIMRAD EK80 bioestadística |
description |
This study shows the characterization of krill (Euphausia superba) aggregations identified in the Bransfield Strait and around of Elephant Island. Data were collected using a multifrequency SIMRAD EK80 echosounder during three austral summers: 2018, 2019 and 2020. For detection of krill aggregations, two frequencies (38 and 120 kHz) and an automated Echoview version 9 algorithm with the EchoviewR package in R were used. A total of 22,221 aggregations were detected. Acoustic descriptors were analyzed with Pearson’s correlation. For the characterization of krill aggregations, principal component analysis (PCA) was applied, followed by hierarchical clustering. To determine temporal differences of clusters, an ANOVA was applied. In addition, krill aggregations were assigned to surface environmental variables to apply a generalized additive model (GAM). Three clusters were identified using the first three dimensions of the PCA (which explained 81% of the total variability). The first cluster was characterized by krill aggregations having lower height (2 m), backscattering acoustic energy (7 m2 mn-2), and being located at a greater depth (81 m). The second cluster had the shallowest swarms (34 m), shortest length (75 m) and compactness (202). Finally, the third cluster had the largest swarms in length (849 m), volume (207,412 m3) and height (11 m); in addition of having greater acoustic energy (637 m2 mn-2), obliquity (6), compactness (2,436) and coefficient of variation (213). Spatially, cluster I was located with a greater presence around Elephant Island during 2018 and 2019, while for the same period, clusters I and II were located scattered throughout the study area but focused on the Bransfield Strait. By 2020, thermal anomalies of approximately + 2 °C were presented and a dispersion of the three clusters was noted throughout the study area, where cluster I was located with a greater presence in the Bransfield Strait. Significant differences (p < 0.05) were found among the clusters per year. However, such ... |
format |
Article in Journal/Newspaper |
author |
Valdez, Carlos Grados, Grados La Cruz, Luis Cuadros, Gustavo Cornejo, Rodolfo Castillo León, Ramiro |
author_facet |
Valdez, Carlos Grados, Grados La Cruz, Luis Cuadros, Gustavo Cornejo, Rodolfo Castillo León, Ramiro |
author_sort |
Valdez, Carlos |
title |
Caracterización acústica de las agregaciones de krill (Euphausia superba) detectadas automáticamente en el Estrecho de Bransfield e Isla Elefante |
title_short |
Caracterización acústica de las agregaciones de krill (Euphausia superba) detectadas automáticamente en el Estrecho de Bransfield e Isla Elefante |
title_full |
Caracterización acústica de las agregaciones de krill (Euphausia superba) detectadas automáticamente en el Estrecho de Bransfield e Isla Elefante |
title_fullStr |
Caracterización acústica de las agregaciones de krill (Euphausia superba) detectadas automáticamente en el Estrecho de Bransfield e Isla Elefante |
title_full_unstemmed |
Caracterización acústica de las agregaciones de krill (Euphausia superba) detectadas automáticamente en el Estrecho de Bransfield e Isla Elefante |
title_sort |
caracterización acústica de las agregaciones de krill (euphausia superba) detectadas automáticamente en el estrecho de bransfield e isla elefante |
publishDate |
2022 |
url |
https://dialnet.unirioja.es/servlet/oaiart?codigo=8808992 |
long_lat |
ENVELOPE(-55.184,-55.184,-61.085,-61.085) ENVELOPE(-57.955,-57.955,-61.923,-61.923) ENVELOPE(-60.783,-60.783,-62.467,-62.467) ENVELOPE(-55.167,-55.167,-61.167,-61.167) ENVELOPE(-60.438,-60.438,-62.720,-62.720) |
geographic |
Antarctic Austral Bransfield Strait Elephant Island Gam Estrecho Elefante isla Elefante |
geographic_facet |
Antarctic Austral Bransfield Strait Elephant Island Gam Estrecho Elefante isla Elefante |
genre |
Antarc* Antarctic Antártida Bransfield Strait Elephant Island Euphausia superba |
genre_facet |
Antarc* Antarctic Antártida Bransfield Strait Elephant Island Euphausia superba |
op_source |
Marine & Fishery Sciences (MAFIS), ISSN 2683-7595, Vol. 35, Nº. 3, 2022 (Ejemplar dedicado a: Marine and Fishery Sciences (MAFIS)), pags. 315-331 |
op_relation |
https://dialnet.unirioja.es/servlet/oaiart?codigo=8808992 (Revista) ISSN 2683-7951 (Revista) ISSN 2683-7595 |
op_rights |
LICENCIA DE USO: Los documentos a texto completo incluidos en Dialnet son de acceso libre y propiedad de sus autores y/o editores. Por tanto, cualquier acto de reproducción, distribución, comunicación pública y/o transformación total o parcial requiere el consentimiento expreso y escrito de aquéllos. Cualquier enlace al texto completo de estos documentos deberá hacerse a través de la URL oficial de éstos en Dialnet. Más información: https://dialnet.unirioja.es/info/derechosOAI | INTELLECTUAL PROPERTY RIGHTS STATEMENT: Full text documents hosted by Dialnet are protected by copyright and/or related rights. This digital object is accessible without charge, but its use is subject to the licensing conditions set by its authors or editors. Unless expressly stated otherwise in the licensing conditions, you are free to linking, browsing, printing and making a copy for your own personal purposes. All other acts of reproduction and communication to the public are subject to the licensing conditions expressed by editors and authors and require consent from them. Any link to this document should be made using its official URL in Dialnet. More info: https://dialnet.unirioja.es/info/derechosOAI |
_version_ |
1766267910729236480 |
spelling |
ftdialnet:oai:dialnet.unirioja.es:ART0001580511 2023-05-15T13:59:22+02:00 Caracterización acústica de las agregaciones de krill (Euphausia superba) detectadas automáticamente en el Estrecho de Bransfield e Isla Elefante Valdez, Carlos Grados, Grados La Cruz, Luis Cuadros, Gustavo Cornejo, Rodolfo Castillo León, Ramiro 2022 application/pdf https://dialnet.unirioja.es/servlet/oaiart?codigo=8808992 spa spa https://dialnet.unirioja.es/servlet/oaiart?codigo=8808992 (Revista) ISSN 2683-7951 (Revista) ISSN 2683-7595 LICENCIA DE USO: Los documentos a texto completo incluidos en Dialnet son de acceso libre y propiedad de sus autores y/o editores. Por tanto, cualquier acto de reproducción, distribución, comunicación pública y/o transformación total o parcial requiere el consentimiento expreso y escrito de aquéllos. Cualquier enlace al texto completo de estos documentos deberá hacerse a través de la URL oficial de éstos en Dialnet. Más información: https://dialnet.unirioja.es/info/derechosOAI | INTELLECTUAL PROPERTY RIGHTS STATEMENT: Full text documents hosted by Dialnet are protected by copyright and/or related rights. This digital object is accessible without charge, but its use is subject to the licensing conditions set by its authors or editors. Unless expressly stated otherwise in the licensing conditions, you are free to linking, browsing, printing and making a copy for your own personal purposes. All other acts of reproduction and communication to the public are subject to the licensing conditions expressed by editors and authors and require consent from them. Any link to this document should be made using its official URL in Dialnet. More info: https://dialnet.unirioja.es/info/derechosOAI Marine & Fishery Sciences (MAFIS), ISSN 2683-7595, Vol. 35, Nº. 3, 2022 (Ejemplar dedicado a: Marine and Fishery Sciences (MAFIS)), pags. 315-331 Hydroacoustic aggregations Antarctic multifrequency echosounder SIMRAD EK80 biostatistics Hidroacústica agregaciones Antártida ecosonda multifrecuencia SIMRAD EK80 bioestadística text (article) 2022 ftdialnet 2023-03-29T09:46:13Z This study shows the characterization of krill (Euphausia superba) aggregations identified in the Bransfield Strait and around of Elephant Island. Data were collected using a multifrequency SIMRAD EK80 echosounder during three austral summers: 2018, 2019 and 2020. For detection of krill aggregations, two frequencies (38 and 120 kHz) and an automated Echoview version 9 algorithm with the EchoviewR package in R were used. A total of 22,221 aggregations were detected. Acoustic descriptors were analyzed with Pearson’s correlation. For the characterization of krill aggregations, principal component analysis (PCA) was applied, followed by hierarchical clustering. To determine temporal differences of clusters, an ANOVA was applied. In addition, krill aggregations were assigned to surface environmental variables to apply a generalized additive model (GAM). Three clusters were identified using the first three dimensions of the PCA (which explained 81% of the total variability). The first cluster was characterized by krill aggregations having lower height (2 m), backscattering acoustic energy (7 m2 mn-2), and being located at a greater depth (81 m). The second cluster had the shallowest swarms (34 m), shortest length (75 m) and compactness (202). Finally, the third cluster had the largest swarms in length (849 m), volume (207,412 m3) and height (11 m); in addition of having greater acoustic energy (637 m2 mn-2), obliquity (6), compactness (2,436) and coefficient of variation (213). Spatially, cluster I was located with a greater presence around Elephant Island during 2018 and 2019, while for the same period, clusters I and II were located scattered throughout the study area but focused on the Bransfield Strait. By 2020, thermal anomalies of approximately + 2 °C were presented and a dispersion of the three clusters was noted throughout the study area, where cluster I was located with a greater presence in the Bransfield Strait. Significant differences (p < 0.05) were found among the clusters per year. However, such ... Article in Journal/Newspaper Antarc* Antarctic Antártida Bransfield Strait Elephant Island Euphausia superba Dialnet - Portada de revistas (Universidad de La Rioja) Antarctic Austral Bransfield Strait Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Estrecho ENVELOPE(-60.783,-60.783,-62.467,-62.467) Elefante ENVELOPE(-55.167,-55.167,-61.167,-61.167) isla Elefante ENVELOPE(-60.438,-60.438,-62.720,-62.720) |