Utility of 18-kHz acoustic data for abundance estimation
of Atlantic herring (Clupea harengus)

Saunders, Ryan A.; O'Donnell, Ciaran; Korneliussen, Rolf J.; Fassler, Sascha M. M.; Clarke, Maurice W.; Egan, Afra; Reid, Dave

Utility of 18-kHz acoustic data for abundance estimation of Atlantic herring (Clupea harengus)

Saunders, Ryan A. ORCID: https://orcid.org/0000-0002-1157-7222; O'Donnell, Ciaran; Korneliussen, Rolf J.; Fassler, Sascha M. M.; Clarke, Maurice W.; Egan, Afra; Reid, Dave. 2012 Utility of 18-kHz acoustic data for abundance estimation of Atlantic herring (Clupea harengus). ICES Journal of Marine Sciences, 69 (6). 1086-1098. 10.1093/icesjms/fss059

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Official URL: http://icesjms.oxfordjournals.org/content/69/6/108...

Abstract/Summary

Current acoustic survey protocols for Atlantic herring (Clupea harengus) abundance estimation are principally dependent upon 38-kHz backscatter data. This can constitute a substantial problem for robust stock assessment when 38-kHz data are compromised. Research vessels now typically collect multifrequency data during acoustic surveys, which could be used to remediate such situations. Here, we investigate the utility of using 18- and 120-kHz data for herring abundance estimation when the standard 38-kHz approach is not possible. Estimates of herring abundance/biomass in the Celtic Sea (2007–2010) were calculated at 18, 38, and 120 kHz using the standard 38-kHz target-strength (TS) model and geometrically equivalent TS models at 18 and 120 kHz. These estimates were compared to assess the level of coherence between the three frequencies, and 18-kHz-derived estimates were subsequently input into standard 38-kHz-based population models to evaluate the impact on the assessment. Results showed that estimates of herring abundance/ biomass from 18 and 38 kHz acoustic integration varied by only 0.3–5.4%, and acoustically derived numbers-at-age estimates were not significantly (p . 0.05) different from 1:1. Estimates at 120 kHz were also robust. Furthermore, 18-kHz-derived estimates did not significantly change the assessment model output, indicating that 18-kHz data can be used for herring stock assessment purposes.

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1093/icesjms/fss059

Programmes:

BAS Programmes > Polar Science for Planet Earth (2009 - ) > Ecosystems

ISSN:

1054-3139

Additional Information:

ICES Journal of Marine Science (ICES JMS) flipped to fully open access on 1st January 2023. All content published prior to that date is free to view on the publisher website, and all rights are reserved.

Additional Keywords:

Celtic Sea, Stock assessment

NORA Subject Terms:

Marine Sciences

Date made live:

18 Jul 2012 15:31 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/18808