|START||NEW VOL 20||SEARCH||STATISTICS||PAS - GDANSK DIVISION|
pp. 29-40, vol. 5, 2002
Sea Fisheries Institute, Gdynia, Poland
Abstract: This paper describes results of enhanced version, of the macrosounding method to integrate acoustic data with environmental and biological parameters in a time and space scale, for use in marine ecosystem analyses. Fish distributions are shown by a vari-coloured topographical space, or time based, matrix of volume back-scattering strength (sv). The matrix is calculated for one or the series of surveys for each distance unit (ESDU) in standardized slices of insonified volume. Each sv visualization is accompanied by a parallel cross-section of the same space unit, which provides a distribution of the selected environmental parameter measured during the same survey. Charts of such parameters are produced with the same procedures as for sv. This presentation of multi-disciplinary data greatly improves recognition of time and space gradients. Analyses of data from multi-dimensional matrix calculated for individual transect improve interpretation and modeling of ecosystem characteristics. Application of the method was illustrated by examples, showing its practical use for data from 1994-2001 in the southern Baltic, collected during the autumn ICES acoustic surveys.
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© Polish Acoustical Society - Gdansk Department, Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported. (CC BY-NC-SA 3.0)