caa a22 4500 397551312 CHVBK 20180308164751.0 cr unu---uuuuu 161202e199604 xx s 000 0 eng 10.1006/jmsc.1996.0021 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0021 Species identification using wideband backscatter with neural network and discriminant analysis [Elektronische Daten] [John E. Simmonds, F. Armstrong, Philip J. Copland] The paper reports the results of species-recognition-rate measurements on caged aggregations of mackerel, horse mackerel, saithe, haddock, and two sizes of cod. Data on the acoustic backscattering coefficients were collected in eight contiguous bandwidth intervals covering the frequency band between 27 and 54 kHz. The measurements were made during two to six periods of 24 h for each aggregation of fish. Replicate experiments were carried out for mackerel, horse mackerel, and two sizes of cod. The data were processed to give average frequency spectra. The number of independent observations used to establish the mean was varied to examine the species-recognition dependence on the number of independent observations. The mean spectra were analysed using two recognition methods: neural network and discriminant analysis. A neural network was trained on subsets of the data and recognition rates established for the different numbers of samples used to calculate the mean spectra. Classical discriminant analysis was applied using the same data sets. The results of the two identification methods are presented and show that recognition rates of about 95% are possible using average spectra. The differing recognition rates by species and fish sizes are discussed and the two identification methods compared. Implications for the future development of these methods are considered. © 1996 International Council for the Exploration of the Sea Regular Articles nationallicence acoustics nationallicence discriminant analysis nationallicence neural network nationallicence species classification nationallicence species recognition nationallicence Simmonds John E. SOAFD Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB9 8DB, Scotland aut Armstrong F. SOAFD Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB9 8DB, Scotland aut Copland Philip J. SOAFD Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB9 8DB, Scotland aut ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 189-195 1054-3139 53:2<189 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0021 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0021 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Simmonds John E. SOAFD Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB9 8DB, Scotland aut NATIONALLICENCE 700 1- Armstrong F. SOAFD Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB9 8DB, Scotland aut NATIONALLICENCE 700 1- Copland Philip J. SOAFD Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB9 8DB, Scotland aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 189-195 1054-3139 53:2<189 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford