Journal Article

Acoustic observation and assessment of fish in high-relief habitats

K Cooke, R Kieser and R.D Stanley

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 60, issue 3, pages 658-661
Published in print January 2003 | ISSN: 1054-3139
Published online January 2003 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1016/S1054-3139(03)00052-3
Acoustic observation and assessment of fish in high-relief habitats

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  • Environmental Science
  • Marine and Estuarine Biology

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Acoustics present an alternative sampling strategy in areas characterized by steep slopes and rugged terrain where fishing is impractical. However, when the interference between echoes from fish targets and boundaries is severe, acoustic observations require careful interpretation of the echo returns. This article outlines a method of generating a representative 3D model of the bottom topography that can assist in near-boundary fish discrimination. Images provide greater insight to echo source and highlight some of the difficulties associated with classifying acoustic sign. The results emphasize the importance of good survey design aimed at minimizing side-lobe interference and reducing acoustic-shadow zones.

Keywords: acoustics; acoustic-shadow zones; assessment methods; mapping; 3D imaging

Journal Article.  1637 words.  Illustrated.

Subjects: Environmental Science ; Marine and Estuarine Biology

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