Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 423893
Title Utility of 18-kHz acoustic data for abundance estimation of Atlantic herring (Clupea harengus)
Author(s) Saunders, R.A.; O'Donnell, C.; Korneliussen, R.J.; Fassler, S.M.M.; Clarke, M.W.; Egan, A.R.; Reid, D.
Source ICES Journal of Marine Science 69 (2012)6. - ISSN 1054-3139 - p. 1086 - 1098.
DOI http://dx.doi.org/10.1093/icesjms/fss059
Department(s) IMARES Visserij
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) target-strength - high-frequencies - fish - identification - oceanography - swimbladder - mackerel - krill
Abstract 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
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