Academic Journal
Utility of 18-khz acoustic data for abundance estimation of atlantic herring (clupea harengus)
| العنوان: | Utility of 18-khz acoustic data for abundance estimation of atlantic herring (clupea harengus) |
|---|---|
| المؤلفون: | Saunders, R. A., O'Donnell, C., Korneliussen, R. J., Fassler, S. M. M., Clarke, M. W., Egan, A., Reid, D. |
| بيانات النشر: | Oxford University Press (OUP) |
| سنة النشر: | 2012 |
| المجموعة: | National University of Ireland (NUI), Galway: ARAN |
| مصطلحات موضوعية: | acoustic survey, atlantic herring, celtic sea, 18-khz backscatter, 120-khz backscatter, stock assessment, target-strength, high-frequencies, fish, identification, oceanography, swimbladder, mackerel, krill |
| الوصف: | 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. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| Relation: | ICES Journal of Marine Science; Saunders, R. A. O'Donnell, C.; Korneliussen, R. J.; Fassler, S. M. M.; Clarke, M. W.; Egan, A.; Reid, D. (2012). Utility of 18-khz acoustic data for abundance estimation of atlantic herring (clupea harengus). ICES Journal of Marine Science 69 (6), 1086-1098; 1054-3139,1095-9289; http://hdl.handle.net/10379/13799 |
| DOI: | 10.1093/icesjms/fss059 |
| الاتاحة: | http://hdl.handle.net/10379/13799 https://doi.org/10.1093/icesjms/fss059 |
| Rights: | Attribution-NonCommercial-NoDerivs 3.0 Ireland ; https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ |
| رقم الانضمام: | edsbas.C7956A36 |
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