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New applications of hydroacoustic methods for monitoring shallow water aquatic ecosystems: the case of mussel culture grounds ArchiMer
Brehmer, Patrice; Gerlotto, François; Guillard, Joelle; Sanguinede, Fabien; Guennegan, Yvon; Buestel, Dominique.
The development of acoustics tools and methods for monitoring anthropized ecosystems represents a new field for the application of acoustics. Monitoring such an environment was not possible with single vertical echo sounders, due to the fact that the artificial structures and the natural targets were not distinguishable. Monitoring data were collected along the French Mediterranean coastline, during five short surveys of mussel culture longline areas. Both the Reson Seabat 6012 multibeam sonar (455 kHz) and the Simrad SR 240 omnidirectional sonar (23.75 kHz) were used for target detection. The former tools allow accurate allocation of the different types of echoes to artefacts, fish schools and scattered fish. The school characteristics collected included...
Tipo: Text Palavras-chave: Ecosystem; Artificial reef; Mussel longline; Fish school; Monitoring; Multibeam sonar.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-574.pdf
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