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Ex situ and in situ target strength measurements of European anchovy in the Bay of Biscay

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Ex situ and in situ target strength measurements of European anchovy in the Bay of Biscay

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dc.contributor.author Sobradillo, B. es_ES
dc.contributor.author Boyra, G. es_ES
dc.contributor.author Pérez Arjona, Isabel es_ES
dc.contributor.author Martínez, U. es_ES
dc.contributor.author Espinosa Roselló, Víctor es_ES
dc.date.accessioned 2021-11-05T14:09:21Z
dc.date.available 2021-11-05T14:09:21Z
dc.date.issued 2021-07 es_ES
dc.identifier.issn 1054-3139 es_ES
dc.identifier.uri http://hdl.handle.net/10251/176365
dc.description.abstract [EN] This study measures the dorsal aspect target strength (TS; dB re 1¿m2) and TS¿length (standard length, SL; cm) relationships for European anchovy, attained both ex situ and in situ in two different seasons across 7 years in the Bay of Biscay. The measurements were made at three frequently used acoustic frequencies (38, 120, and 200¿kHz). A backscattering model for physostome fish was utilized to help interpret the results. The obtained experimental mean TS for anchovies with an SL of 3.5¿19.5¿cm was ¿44.6 (±2.3), ¿46.9 (±3), and ¿48.4 (±2.7) dB at 38, 120, and 200¿kHz, respectively, yielding b20 values of ¿66.4, ¿68.7, and ¿70.4¿dB, respectively. The results were consistent across seasons and between in situ and ex situ conditions, presenting TS¿length relationships with statistically significant slopes (p-values <0.05) for all frequencies. This research represents part of a series of efforts planned to obtain a comprehensive TS vs. length and depth relationship to update the acoustic assessment methodology of European anchovy in the Bay of Biscay. es_ES
dc.description.sponsorship This study was funded by AZTI-Tecnalia and supported by the research projects JAULA for the ex situ measurements and JUVENA for the in situ ones. The project JAULA was funded by the Department of Agriculture, Fisheries and Food of the Basque Country Government; we thank Unai Cotano, the leader of the project, for giving us access to the cage and for providing biological sampling information. We would like to thank the crew from the Itsas Lagunak for providing us with the anchovy specimens, the Aquaculture School from Mutriku for keeping the specimens during the acclimatization period and the technician and diver Gaizka Bidegain from AZTI for the maintenance and underwater inspection of the specimens used throughout the ex situ measurements. Yolanda Lacalle is thanked for the illustration in Figure 2. The project JUVENA was co-funded by the Direccio¿ n de Innovacio¿ n y Desarrollo Tecnolo¿ gico, Viceconsejer¿¿a de Pol¿¿tica e Industria Alimentaria, Dpto. Agricultura, Pesca y Alimentacio¿ n of the Basque Government and the Secretar¿¿a General del Mar, Ministerio de Agricultura, Alimentacio¿ n y Medio Ambiente of the Spanish Government. Thanks also to Andre¿s Uriarte (Azti) for improving this work with his valuable comments and to Mathieu Doray and Laurent Berger (Ifremer) for their helpful suggestions regarding the analysis and the interpretation of the results. Finally, thanks to the anonymous contribution of the reviewers for helping improve the quality and readability of this work. es_ES
dc.language Inglés es_ES
dc.publisher Oxford University Press es_ES
dc.relation.ispartof ICES Journal of Marine Science es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Engraulis encrasicolus es_ES
dc.subject Ex situ es_ES
dc.subject In situ es_ES
dc.subject Method of fundamental solutions es_ES
dc.subject Target strength es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.title Ex situ and in situ target strength measurements of European anchovy in the Bay of Biscay es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1093/icesjms/fsaa242 es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.description.bibliographicCitation Sobradillo, B.; Boyra, G.; Pérez Arjona, I.; Martínez, U.; Espinosa Roselló, V. (2021). Ex situ and in situ target strength measurements of European anchovy in the Bay of Biscay. ICES Journal of Marine Science. 78(3):782-796. https://doi.org/10.1093/icesjms/fsaa242 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1093/icesjms/fsaa242 es_ES
dc.description.upvformatpinicio 782 es_ES
dc.description.upvformatpfin 796 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 78 es_ES
dc.description.issue 3 es_ES
dc.relation.pasarela S\423500 es_ES
dc.contributor.funder Gobierno Vasco/Eusko Jaurlaritza es_ES
dc.contributor.funder Ministerio de Agricultura, Alimentación y Medio Ambiente es_ES
dc.subject.ods 14.- Conservar y utilizar de forma sostenible los océanos, mares y recursos marinos para lograr el desarrollo sostenible es_ES


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