Ecosystem management in 4 dimensions
نویسنده
چکیده
Management of marine resources is supported by extensive use of acoustic data. Ecosystem management requires simultaneous observations of marine organisms and their interactions. The use of quantitative sonar combined with vertical oriented echo sounders is essential: the multi-frequency echosounder data is used to remotely identify acoustic scattering categories and the spatial distribution of these below the ship, while the quantitative essentially single-frequency Simrad MS70 sonar is able to measure the water volume around the ship in time and space (4D). For practical reasons, the large volumes of data that are collected during 24 hours should be scrutinized within 2 hours in front of the computer. Methods used to visualise and process the acoustic data are discussed together with the basic philosophy to make the system work in practical use. Contact author: Korneliussen, R. J., Institute of Marine Research, P.O. Box 1870 Nordnes, NO-5817 Bergen, NORWAY, email: [email protected]
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