Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer

Autores
Madirolas, Adrian Osvaldo; Membiela, Federico Agustin; Gonzalez, Juan Domingo; Cabreira, Ariel Gustavo; dell'Erba, Matias German; Prario, Igor Sebastian; Blanc, Silvia
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Engraulis anchoita is a physostomous fish with a dual chambered swimbladder (sb). In situ target strength (TS) measurements on this species are only possible at night, when anchovies disperse forming a scattering layer near the sea surface. A survey data series comprising more than 50000 single target detections, recorded from 1995 to 2008, was analyzed in order to study the species specific TS at 38 kHz. A TS vs. fish total length (L) equation was obtained from the in situ measurements (TS = 31.9 log L - 82.4 dB; r 2 = 0.78). When the slope of the regression line was forced to 20 into the TS equation, the resulting value for the constant term (b 20) was -'68.6 dB. In any case, these results indicate an average difference of +3 dB (higher TS values) when compared with the general model suggested for clupeoid fish. The TS measurements obtained inside the nighttime sound scattering layer exhibited a negative trend with depth. An empirical depth dependence term for the anchovy TS equation was obtained through a three parameter least square fitting of the data [TS = 31.3 log L - 79.6 dB - 4.74 log (1 + z/10); r 2 = 0.74]. Anatomical data obtained through high resolution X-Ray Computed Tomography was employed as input for a Prolate Spheroidal Model (PSM). Theoretical TS vs. tilt angle functions were obtained considering the compression of the sb at different depths and under the assumption of different contraction rates. The TS functions were then averaged over different fish tilt angle distributions and used to derive theoretical depth dependence curves of average fish TS. The implications of the adopted sb contraction rate and tilt angle distribution are discussed by comparing the modelled TS(z) curves against the empirical data.
Fil: Madirolas, Adrian Osvaldo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Membiela, Federico Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; Argentina
Fil: Gonzalez, Juan Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina
Fil: Cabreira, Ariel Gustavo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: dell'Erba, Matias German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; Argentina
Fil: Prario, Igor Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina
Fil: Blanc, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina
Materia
Depth Dependence
Engraulis Anchoita
Fish Target Strength
In Situ Measurements
Physostomous Fish
Ts Modelling
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/55653
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/55653
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layerMadirolas, Adrian OsvaldoMembiela, Federico AgustinGonzalez, Juan DomingoCabreira, Ariel Gustavodell'Erba, Matias GermanPrario, Igor SebastianBlanc, SilviaDepth DependenceEngraulis AnchoitaFish Target StrengthIn Situ MeasurementsPhysostomous FishTs Modellinghttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4Engraulis anchoita is a physostomous fish with a dual chambered swimbladder (sb). In situ target strength (TS) measurements on this species are only possible at night, when anchovies disperse forming a scattering layer near the sea surface. A survey data series comprising more than 50000 single target detections, recorded from 1995 to 2008, was analyzed in order to study the species specific TS at 38 kHz. A TS vs. fish total length (L) equation was obtained from the in situ measurements (TS = 31.9 log L - 82.4 dB; r 2 = 0.78). When the slope of the regression line was forced to 20 into the TS equation, the resulting value for the constant term (b 20) was -'68.6 dB. In any case, these results indicate an average difference of +3 dB (higher TS values) when compared with the general model suggested for clupeoid fish. The TS measurements obtained inside the nighttime sound scattering layer exhibited a negative trend with depth. An empirical depth dependence term for the anchovy TS equation was obtained through a three parameter least square fitting of the data [TS = 31.3 log L - 79.6 dB - 4.74 log (1 + z/10); r 2 = 0.74]. Anatomical data obtained through high resolution X-Ray Computed Tomography was employed as input for a Prolate Spheroidal Model (PSM). Theoretical TS vs. tilt angle functions were obtained considering the compression of the sb at different depths and under the assumption of different contraction rates. The TS functions were then averaged over different fish tilt angle distributions and used to derive theoretical depth dependence curves of average fish TS. The implications of the adopted sb contraction rate and tilt angle distribution are discussed by comparing the modelled TS(z) curves against the empirical data.Fil: Madirolas, Adrian Osvaldo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Membiela, Federico Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; ArgentinaFil: Gonzalez, Juan Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; ArgentinaFil: Cabreira, Ariel Gustavo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: dell'Erba, Matias German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; ArgentinaFil: Prario, Igor Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; ArgentinaFil: Blanc, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; ArgentinaOxford University Press2017-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/55653Madirolas, Adrian Osvaldo; Membiela, Federico Agustin; Gonzalez, Juan Domingo; Cabreira, Ariel Gustavo; dell'Erba, Matias German; et al.; Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer; Oxford University Press; ICES Journal of Marine Science; 74; 5; 5-2017; 1408-14201054-3139CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/icesjms/fsw185info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/icesjms/article/74/5/1408/2742059info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:46Zoai:ri.conicet.gov.ar:11336/55653instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:54:46.842CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer
title Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer
spellingShingle Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer
Madirolas, Adrian Osvaldo
Depth Dependence
Engraulis Anchoita
Fish Target Strength
In Situ Measurements
Physostomous Fish
Ts Modelling
title_short Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer
title_full Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer
title_fullStr Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer
title_full_unstemmed Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer
title_sort Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer
dc.creator.none.fl_str_mv Madirolas, Adrian Osvaldo
Membiela, Federico Agustin
Gonzalez, Juan Domingo
Cabreira, Ariel Gustavo
dell'Erba, Matias German
Prario, Igor Sebastian
Blanc, Silvia
author Madirolas, Adrian Osvaldo
author_facet Madirolas, Adrian Osvaldo
Membiela, Federico Agustin
Gonzalez, Juan Domingo
Cabreira, Ariel Gustavo
dell'Erba, Matias German
Prario, Igor Sebastian
Blanc, Silvia
author_role author
author2 Membiela, Federico Agustin
Gonzalez, Juan Domingo
Cabreira, Ariel Gustavo
dell'Erba, Matias German
Prario, Igor Sebastian
Blanc, Silvia
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Depth Dependence
Engraulis Anchoita
Fish Target Strength
In Situ Measurements
Physostomous Fish
Ts Modelling
topic Depth Dependence
Engraulis Anchoita
Fish Target Strength
In Situ Measurements
Physostomous Fish
Ts Modelling
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Engraulis anchoita is a physostomous fish with a dual chambered swimbladder (sb). In situ target strength (TS) measurements on this species are only possible at night, when anchovies disperse forming a scattering layer near the sea surface. A survey data series comprising more than 50000 single target detections, recorded from 1995 to 2008, was analyzed in order to study the species specific TS at 38 kHz. A TS vs. fish total length (L) equation was obtained from the in situ measurements (TS = 31.9 log L - 82.4 dB; r 2 = 0.78). When the slope of the regression line was forced to 20 into the TS equation, the resulting value for the constant term (b 20) was -'68.6 dB. In any case, these results indicate an average difference of +3 dB (higher TS values) when compared with the general model suggested for clupeoid fish. The TS measurements obtained inside the nighttime sound scattering layer exhibited a negative trend with depth. An empirical depth dependence term for the anchovy TS equation was obtained through a three parameter least square fitting of the data [TS = 31.3 log L - 79.6 dB - 4.74 log (1 + z/10); r 2 = 0.74]. Anatomical data obtained through high resolution X-Ray Computed Tomography was employed as input for a Prolate Spheroidal Model (PSM). Theoretical TS vs. tilt angle functions were obtained considering the compression of the sb at different depths and under the assumption of different contraction rates. The TS functions were then averaged over different fish tilt angle distributions and used to derive theoretical depth dependence curves of average fish TS. The implications of the adopted sb contraction rate and tilt angle distribution are discussed by comparing the modelled TS(z) curves against the empirical data.
Fil: Madirolas, Adrian Osvaldo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Membiela, Federico Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; Argentina
Fil: Gonzalez, Juan Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina
Fil: Cabreira, Ariel Gustavo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: dell'Erba, Matias German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Físicas de Mar del Plata; Argentina
Fil: Prario, Igor Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina
Fil: Blanc, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina
description Engraulis anchoita is a physostomous fish with a dual chambered swimbladder (sb). In situ target strength (TS) measurements on this species are only possible at night, when anchovies disperse forming a scattering layer near the sea surface. A survey data series comprising more than 50000 single target detections, recorded from 1995 to 2008, was analyzed in order to study the species specific TS at 38 kHz. A TS vs. fish total length (L) equation was obtained from the in situ measurements (TS = 31.9 log L - 82.4 dB; r 2 = 0.78). When the slope of the regression line was forced to 20 into the TS equation, the resulting value for the constant term (b 20) was -'68.6 dB. In any case, these results indicate an average difference of +3 dB (higher TS values) when compared with the general model suggested for clupeoid fish. The TS measurements obtained inside the nighttime sound scattering layer exhibited a negative trend with depth. An empirical depth dependence term for the anchovy TS equation was obtained through a three parameter least square fitting of the data [TS = 31.3 log L - 79.6 dB - 4.74 log (1 + z/10); r 2 = 0.74]. Anatomical data obtained through high resolution X-Ray Computed Tomography was employed as input for a Prolate Spheroidal Model (PSM). Theoretical TS vs. tilt angle functions were obtained considering the compression of the sb at different depths and under the assumption of different contraction rates. The TS functions were then averaged over different fish tilt angle distributions and used to derive theoretical depth dependence curves of average fish TS. The implications of the adopted sb contraction rate and tilt angle distribution are discussed by comparing the modelled TS(z) curves against the empirical data.
publishDate 2017
dc.date.none.fl_str_mv 2017-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/55653
Madirolas, Adrian Osvaldo; Membiela, Federico Agustin; Gonzalez, Juan Domingo; Cabreira, Ariel Gustavo; dell'Erba, Matias German; et al.; Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer; Oxford University Press; ICES Journal of Marine Science; 74; 5; 5-2017; 1408-1420
1054-3139
CONICET Digital
CONICET
url http://hdl.handle.net/11336/55653
identifier_str_mv Madirolas, Adrian Osvaldo; Membiela, Federico Agustin; Gonzalez, Juan Domingo; Cabreira, Ariel Gustavo; dell'Erba, Matias German; et al.; Acoustic target strength (TS) of argentine anchovy (Engraulis anchoita): The nighttime scattering layer; Oxford University Press; ICES Journal of Marine Science; 74; 5; 5-2017; 1408-1420
1054-3139
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/icesjms/fsw185
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/icesjms/article/74/5/1408/2742059
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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