Multi-frequency and light-avoiding characteristics of deep acoustic layers in the North Atlantic
This study aimed to add light-avoidance as a categorizing technique for the study of mesopelagic acoustic layers. Data recorded along the 20° W parallel from 20° N to Iceland showed three types of mesopelagic layers: the non-avoiding non-migrant deep scattering layer (NMDSL), which dropped its inten...
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Online Access: | https://doi.org/10.1016/j.marenvres.2019.104842 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/59995 2023-05-15T16:49:46+02:00 Multi-frequency and light-avoiding characteristics of deep acoustic layers in the North Atlantic Peña, Marian Cabrera-Gámez, Jorge Domínguez-Brito, Antonio C. 7101969144 6602769289 6507584188 3925794 35009091 20411132 WOS:Pena, M WOS:Cabrera-Gamez, J WOS:Dominguez-Brito, AC BU-INF 2020 https://doi.org/10.1016/j.marenvres.2019.104842 eng eng Marine Environmental Research 154 0141-1136 Scopus doi:10.1016/j.marenvres.2019.104842 85076240114 000515214100008 1879-0291 104842 Sí Marine Environmental Research [ISSN 0141-1136], n. 154, 104842, (Febrero 2020) 251011 Acústica submarina 120325 Diseño de sistemas sensores Artificial light Avoidance Frequency response Mesopelagic Migration Deep scattering layers info:eu-repo/semantics/article Article 2020 ftunivlaspalmas https://doi.org/10.1016/j.marenvres.2019.104842 2021-05-11T23:10:42Z This study aimed to add light-avoidance as a categorizing technique for the study of mesopelagic acoustic layers. Data recorded along the 20° W parallel from 20° N to Iceland showed three types of mesopelagic layers: the non-avoiding non-migrant deep scattering layer (NMDSL), which dropped its intensity toward the north, the avoiding migrating fish layers (MDSL), which were more intense at upwelling areas and toward the north, and a secondary deeper NMDSL at the southern part. Light avoidance was only discernible at 18 kHz within the main NMDSL when this layer was intense, suggesting that migrants are barely seen at 38 kHz when other resonant scatterers occupy these depths. These results highlight the importance of employing the 18 kHz frequency from a vessel borne echosounder or lowered echosounders attached to a probe to study gas-bearing migrants. 9 Article in Journal/Newspaper Iceland North Atlantic Universidad de Las Palmas de Gran Canaria: Acceda Marine Environmental Research 154 104842 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251011 Acústica submarina 120325 Diseño de sistemas sensores Artificial light Avoidance Frequency response Mesopelagic Migration Deep scattering layers |
spellingShingle |
251011 Acústica submarina 120325 Diseño de sistemas sensores Artificial light Avoidance Frequency response Mesopelagic Migration Deep scattering layers Peña, Marian Cabrera-Gámez, Jorge Domínguez-Brito, Antonio C. Multi-frequency and light-avoiding characteristics of deep acoustic layers in the North Atlantic |
topic_facet |
251011 Acústica submarina 120325 Diseño de sistemas sensores Artificial light Avoidance Frequency response Mesopelagic Migration Deep scattering layers |
description |
This study aimed to add light-avoidance as a categorizing technique for the study of mesopelagic acoustic layers. Data recorded along the 20° W parallel from 20° N to Iceland showed three types of mesopelagic layers: the non-avoiding non-migrant deep scattering layer (NMDSL), which dropped its intensity toward the north, the avoiding migrating fish layers (MDSL), which were more intense at upwelling areas and toward the north, and a secondary deeper NMDSL at the southern part. Light avoidance was only discernible at 18 kHz within the main NMDSL when this layer was intense, suggesting that migrants are barely seen at 38 kHz when other resonant scatterers occupy these depths. These results highlight the importance of employing the 18 kHz frequency from a vessel borne echosounder or lowered echosounders attached to a probe to study gas-bearing migrants. 9 |
author2 |
7101969144 6602769289 6507584188 3925794 35009091 20411132 WOS:Pena, M WOS:Cabrera-Gamez, J WOS:Dominguez-Brito, AC BU-INF |
format |
Article in Journal/Newspaper |
author |
Peña, Marian Cabrera-Gámez, Jorge Domínguez-Brito, Antonio C. |
author_facet |
Peña, Marian Cabrera-Gámez, Jorge Domínguez-Brito, Antonio C. |
author_sort |
Peña, Marian |
title |
Multi-frequency and light-avoiding characteristics of deep acoustic layers in the North Atlantic |
title_short |
Multi-frequency and light-avoiding characteristics of deep acoustic layers in the North Atlantic |
title_full |
Multi-frequency and light-avoiding characteristics of deep acoustic layers in the North Atlantic |
title_fullStr |
Multi-frequency and light-avoiding characteristics of deep acoustic layers in the North Atlantic |
title_full_unstemmed |
Multi-frequency and light-avoiding characteristics of deep acoustic layers in the North Atlantic |
title_sort |
multi-frequency and light-avoiding characteristics of deep acoustic layers in the north atlantic |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.marenvres.2019.104842 |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
Marine Environmental Research [ISSN 0141-1136], n. 154, 104842, (Febrero 2020) |
op_relation |
Marine Environmental Research 154 0141-1136 Scopus doi:10.1016/j.marenvres.2019.104842 85076240114 000515214100008 1879-0291 104842 Sí |
op_doi |
https://doi.org/10.1016/j.marenvres.2019.104842 |
container_title |
Marine Environmental Research |
container_volume |
154 |
container_start_page |
104842 |
_version_ |
1766039966309154816 |