The acoustic properties of Salpa thompsoni

Handle URI:
http://hdl.handle.net/10754/561545
Title:
The acoustic properties of Salpa thompsoni
Authors:
Wiebe, Peter H.; Chu, Dezhang; Kaartvedt, Stein ( 0000-0002-8793-2948 ) ; Hundt, Anna; Melle, Webjørn; Ona, Egil; Batta-Lona, Paola G.
Abstract:
Aggregations of the salp Salpa thompsoni were encountered during the Antarctic krill and ecosystem-studies cruise on the RV "G.O. Sars" from 19 February to 27 March 2008. The salp's in situ target strength (TS), size, number of individuals in aggregate chains, and chain angle of orientation were determined. Shipboard measurements were made of Salpa thompsoni's material properties. Individual aggregates were mostly 45.5-60.6 mm in mean length; relatively rare solitaries were ∼100 mm. Chains ranged from 3 to at least 121 individuals, and in surface waters (<20 m), they showed no preferred angle of orientation. Sound-speed contrast (h) ranged from 1.0060 to 1.0201 and density contrast (g) estimates between 1.0000 and 1.0039. The in situ TS distributions peaked between-75 and - 76 dB at 38 kHz, with a secondary peak at approximately - 65 dB. TS ranged between-85 and - 65 dB at 120 and 200 kHz and peaked around-74 dB. The measured in situ TS of salps reasonably matched the theoretical scattering-model predictions based on multi-individual chains. The backscattering from aggregate salps gives rise to TS values that can be similar to krill and other zooplankton with higher density and sound-speed contrasts. © 2009 International Council for the Exploration of the Sea.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Oxford University Press (OUP)
Journal:
ICES Journal of Marine Science
Issue Date:
1-Dec-2009
DOI:
10.1093/icesjms/fsp263
Type:
Article
ISSN:
10543139
Appears in Collections:
Articles; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorWiebe, Peter H.en
dc.contributor.authorChu, Dezhangen
dc.contributor.authorKaartvedt, Steinen
dc.contributor.authorHundt, Annaen
dc.contributor.authorMelle, Webjørnen
dc.contributor.authorOna, Egilen
dc.contributor.authorBatta-Lona, Paola G.en
dc.date.accessioned2015-08-02T09:13:53Zen
dc.date.available2015-08-02T09:13:53Zen
dc.date.issued2009-12-01en
dc.identifier.issn10543139en
dc.identifier.doi10.1093/icesjms/fsp263en
dc.identifier.urihttp://hdl.handle.net/10754/561545en
dc.description.abstractAggregations of the salp Salpa thompsoni were encountered during the Antarctic krill and ecosystem-studies cruise on the RV "G.O. Sars" from 19 February to 27 March 2008. The salp's in situ target strength (TS), size, number of individuals in aggregate chains, and chain angle of orientation were determined. Shipboard measurements were made of Salpa thompsoni's material properties. Individual aggregates were mostly 45.5-60.6 mm in mean length; relatively rare solitaries were ∼100 mm. Chains ranged from 3 to at least 121 individuals, and in surface waters (<20 m), they showed no preferred angle of orientation. Sound-speed contrast (h) ranged from 1.0060 to 1.0201 and density contrast (g) estimates between 1.0000 and 1.0039. The in situ TS distributions peaked between-75 and - 76 dB at 38 kHz, with a secondary peak at approximately - 65 dB. TS ranged between-85 and - 65 dB at 120 and 200 kHz and peaked around-74 dB. The measured in situ TS of salps reasonably matched the theoretical scattering-model predictions based on multi-individual chains. The backscattering from aggregate salps gives rise to TS values that can be similar to krill and other zooplankton with higher density and sound-speed contrasts. © 2009 International Council for the Exploration of the Sea.en
dc.publisherOxford University Press (OUP)en
dc.subjectAcoustic detectionen
dc.subjectDWBA salp backscattering modelen
dc.subjectSalp in situ imagesen
dc.subjectSalp material propertiesen
dc.subjectSalp target strengthen
dc.subjectSalpa thompsonien
dc.subjectZooplanktonen
dc.titleThe acoustic properties of Salpa thompsonien
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalICES Journal of Marine Scienceen
dc.contributor.institutionBiology Department, Woods Hole Oceanographic Institution, Mail Stop 33, Woods Hole, MA 02543, United Statesen
dc.contributor.institutionNOAA, NMFS/NWFSC, FRAM, 2725 Montlake Boulevar East, Seattle, WA 98112, United Statesen
dc.contributor.institutionDepartment of Biology, University of Oslo, PO Box 1066, Blindern, N-0316 Oslo, Norwayen
dc.contributor.institutionDepartment of Biology, University of Bergen, PO Box 7800, 5020 Bergen, Norwayen
dc.contributor.institutionInstitute of Marine Research, PO Box 1870, Nordnes, 5817 Bergen, Norwayen
dc.contributor.institutionUniversity of Connecticut-Avery Point, 1080 Shennecossett Road, Groton, CT 06340, United Statesen
kaust.authorKaartvedt, Steinen
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