Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic

Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic

7 pages, 6 figures, 1 table

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Bibliographic Details
Main Authors: Peña, Marian, Villanueva, Roger, Escánez Pérez, Alejandro, Ariza, A.
Other Authors: Ministerio de Economía y Competitividad (España)
Format: artículo biblioteca
Published: Elsevier 2018-03
Subjects:Mesopelagic fish, Acoustics, Sthenoteuthis pteropus, Behaviour, Migration,
Online Access:http://hdl.handle.net/10261/163589
http://dx.doi.org/10.13039/501100003329
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spelling dig-icm-es-10261-1635892020-12-10T17:16:43Z Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic Peña, Marian Villanueva, Roger Escánez Pérez, Alejandro Ariza, A. Ministerio de Economía y Competitividad (España) Mesopelagic fish Acoustics Sthenoteuthis pteropus Behaviour Migration 7 pages, 6 figures, 1 table Squids are fast swimmers that are difficult to catch by nets and to record with echosounders in the open ocean. A rare detection of orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic Ocean off the coast of Senegal was accomplished during the MAFIA oceanographic survey carried out between Brazil and the Canary Islands in April 2015. Although net sampling did not yield any subadult or adult individuals, dozens were visually detected from the vessel jumping out of the water at night and displaying their characteristic dorsal photophore patch. A few squids were caught with fishing lines and identified at the species level. The acoustic echograms revealed distinctive previously unobserved acoustic echotraces that seemed to be caused by those squids, which were the only new species detected at that station (over a bottom depth ranging from 4010 to 5215 m, between 10° 45′ N 22° 41′ W and 10° 53′ N 22° 40′ W). The acoustic response and swimming behaviour shown by those echotraces reinforced this hypothesis. The (potentially) squid recordings dove rapidly (0.19 m/s to 0.48 m/s) from around 10 m below the mesopelagic fish layer, which had migrated to the subsurface at night (35 m depth), to depths of 70–95 m, and swam upward, apparently attacking fish from below. The morning squid migration to deeper waters (250–300 m) was also recorded acoustically. Downward movements of squid swimming at speeds of 0.22 m/s were calculated from the echogram, while the mesopelagic migrating fish swam at 0.27 m/s reaching 250 m depth. S − S averaged 2.7 ± 3.2 dB for the squid echotraces while the mesopelagic layer showed values of −8.8 ± 0.9 dB. These ranges agreed with values in the literature and from theoretical models. This study provides more insight into the migrating behaviour of oceanic squids, a species group that is poorly represented in the acoustic literature due to challenges in studying them This research was funded by Spanish Ministerio de Economía y Competitividad (MINECO) through project CTM2012-39587-C04-03. RV was financed by the MINECO project AGL2012-39077 Peer Reviewed 2018-04-13T06:51:55Z 2018-04-13T06:51:55Z 2018-03 2018-04-13T06:51:56Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.jmarsys.2017.11.003 issn: 0924-7963 e-issn: 1879-1573 Journal of Marine Systems 179: 31-37 (2018) http://hdl.handle.net/10261/163589 10.1016/j.jmarsys.2017.11.003 http://dx.doi.org/10.13039/501100003329 https://doi.org/10.1016/j.jmarsys.2017.11.003 Sí none Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
topic Mesopelagic fish
Acoustics
Sthenoteuthis pteropus
Behaviour
Migration
Mesopelagic fish
Acoustics
Sthenoteuthis pteropus
Behaviour
Migration
spellingShingle Mesopelagic fish
Acoustics
Sthenoteuthis pteropus
Behaviour
Migration
Mesopelagic fish
Acoustics
Sthenoteuthis pteropus
Behaviour
Migration
Peña, Marian
Villanueva, Roger
Escánez Pérez, Alejandro
Ariza, A.
Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic
description 7 pages, 6 figures, 1 table
author2 Ministerio de Economía y Competitividad (España)
author_facet Ministerio de Economía y Competitividad (España)
Peña, Marian
Villanueva, Roger
Escánez Pérez, Alejandro
Ariza, A.
format artículo
topic_facet Mesopelagic fish
Acoustics
Sthenoteuthis pteropus
Behaviour
Migration
author Peña, Marian
Villanueva, Roger
Escánez Pérez, Alejandro
Ariza, A.
author_sort Peña, Marian
title Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic
title_short Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic
title_full Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic
title_fullStr Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic
title_full_unstemmed Opportunistic acoustic recordings of (potential) orangeback flying squid Sthenoteuthis pteropus in the Central Eastern Atlantic
title_sort opportunistic acoustic recordings of (potential) orangeback flying squid sthenoteuthis pteropus in the central eastern atlantic
publisher Elsevier
publishDate 2018-03
url http://hdl.handle.net/10261/163589
http://dx.doi.org/10.13039/501100003329
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AT escanezperezalejandro opportunisticacousticrecordingsofpotentialorangebackflyingsquidsthenoteuthispteropusinthecentraleasternatlantic
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