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Acoustic identification of marine species using a feature library

Published on Dec 1, 2016in Methods in Oceanography
· DOI :10.1016/j.mio.2016.09.002
Rolf J. Korneliussen14
Estimated H-index: 14
,
Yngve Heggelund6
Estimated H-index: 6
+ 3 AuthorsInge K. Eliassen5
Estimated H-index: 5
Abstract
Abstract Sonars and echosounders are widely used for remote sensing of life in the marine environment. There is an ongoing need to make the acoustic identification of marine species more correct and objective and thereby reduce the uncertainty of acoustic abundance estimates. In our work, data from multi-frequency echosounders working simultaneously with nearly identical and overlapping acoustic beams are processed stepwise in a modular sequence to improve data, detect schools and categorize acoustic targets by means of the Large Scale Survey System software (LSSS). Categorization is based on the use of an acoustic feature library whose main components are the relative frequency responses. The results of the categorization are translated into acoustic abundance of species. The method is tested on acoustic data from the Barents Sea, the Norwegian Sea and the North Sea, where the target species were capelin ( Mallotus villosus L.), Atlantic mackerel ( Scomber scombrus L.) and sandeel ( Ammodytes marinus L.), respectively. Manual categorization showed a high conformity with automatic categorization for all surveys, especially for schools.
  • References (35)
  • Citations (19)
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References35
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Korneliussen, R. J. 2010. The acoustic identification of Atlantic mackerel. - ICES Journal of Marine Science, 67: 1749-1758.Calibrated, digitized data from multifrequency echosounders working simultaneously with nearly identical and overlapping acoustic beams were used to generate new, synthetic echograms which allow Atlantic mackerel (Scomber scombrus) to be identified acoustically. The raw echosounder data were processed stepwise in a modular sequence of analyses to improve categorization of t...
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Korneliussen, R. J., Heggelund, Y., Eliassen, I. K., Oye, O. K., Knutsen, T., and Dalen, J. 2009. Combining multibeam-sonar and multifrequency-echosounder data: examples of the analysis and imaging of large euphausiid schools. - ICES Journal of Marine Science, 66: 991-997.The first high-resolution, quantitative, multibeam sonar (Simrad MS70) ever developed was mounted in a keel of RV “G. O. Sars” with port-orientated beams. Each ping samples a volume of 60° horizontally × 45° vertically with 500...
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Pedersen, G., and Korneliussen, R. J. 2009. The relative frequency response derived from individually separated targets of northeast Arctic cod (Gadus morhua), saithe (Pollachius virens), and Norway pout (Trisopterus esmarkii). - ICES Journal of Marine Science, 66: 1149-1154.The concept of relative frequency response r(f) of fish is an important feature used to characterize acoustic targets. It is defined as the volume-backscattering coefficient at a specific frequency f relative to that of a re...
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