caa a22 4500 397551622 CHVBK 20180308164752.0 cr unu---uuuuu 161202e199604 xx s 000 0 eng 10.1006/jmsc.1996.0020 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0020 Narrowband acoustic identification of monospecific fish shoals [Elektronische Daten] [Carla Scalabrin, Nöel Diner, Alain Weill, Alain Hillion, Marie-Catherine Mouchot] The extraction of highly discriminant features is crucial for successful species identification of fish shoals if backscattered narrowband signals do indeed contain discriminant information. Four different methods of feature extraction are described and applied to the same data, providing new descriptors expected to improve species identification. Echograms, amplitude probability density function (PDFs) and spectral features are used to describe acoustic images of single shoals. Image processing is used to improve signal shoal description, by taking into account the shoal structure and species-related spatial distribution. Three pelagic species are considered: sardine (Sardina pilchardus (Walbaum)), anchovy (Engraulis encrasicolus (L.)), and horse mackerel (Trachurus trachurus (L.)) detected during fisheries acoustics surveys conducted in the Bay of Biscay. A correct classification rate of 57% overall was found for data covering a mesoscale oceanographic environment and including seasonal variability. If space and time scales are reduced this value increased to 98%, emphasizing the value of non-acoustic and a priori information. © 1996 International Council for the Exploration of the Sea Regular Articles nationallicence acoustics nationallicence amplitude PDFs nationallicence fish schools nationallicence identification nationallicence pattern recognition nationallicence spectral features nationallicence Scalabrin Carla Département Image et Traitement de l'Information TELCOM-Bretagne, BP 832, 29285 Brest Cedex, France aut Diner Nöel IFREMER, Laboratoire Acoustique-Pêche, Département de Génie Océanique BP 70, 29280 Plouzané, France aut Weill Alain IFREMER, Laboratoire Acoustique-Pêche, Département de Génie Océanique BP 70, 29280 Plouzané, France aut Hillion Alain Département Image et Traitement de l'Information TELCOM-Bretagne, BP 832, 29285 Brest Cedex, France aut Mouchot Marie-Catherine Département Image et Traitement de l'Information TELCOM-Bretagne, BP 832, 29285 Brest Cedex, France aut ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 181-188 1054-3139 53:2<181 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0020 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0020 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Scalabrin Carla Département Image et Traitement de l'Information TELCOM-Bretagne, BP 832, 29285 Brest Cedex, France aut NATIONALLICENCE 700 1- Diner Nöel IFREMER, Laboratoire Acoustique-Pêche, Département de Génie Océanique BP 70, 29280 Plouzané, France aut NATIONALLICENCE 700 1- Weill Alain IFREMER, Laboratoire Acoustique-Pêche, Département de Génie Océanique BP 70, 29280 Plouzané, France aut NATIONALLICENCE 700 1- Hillion Alain Département Image et Traitement de l'Information TELCOM-Bretagne, BP 832, 29285 Brest Cedex, France aut NATIONALLICENCE 700 1- Mouchot Marie-Catherine Département Image et Traitement de l'Information TELCOM-Bretagne, BP 832, 29285 Brest Cedex, France aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 181-188 1054-3139 53:2<181 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