| Budget Amount *help |
¥25,480,000 (Direct Cost: ¥19,600,000、Indirect Cost: ¥5,880,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
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| Outline of Final Research Achievements |
A broadband echosounder with a broadband transducer using multilayer piezoelectric actuators (elements) and related analysis methods were developed. The features of this system are that a broadband sound with a frequency band of 20-200 kHz can be transmitted and received, and acoustic scattering spectra of marine organisms such as fish and zooplankton can be determined from their echoes. Since the acoustic scattering spectra include their biological information (e.g., species or taxon, size, and behavior), the biological information can be determined without net sampling. This technology allows surveys of the marine organisms by observation platforms in which net samplings are impossible (e.g., AUV and glider). This technology can be applied to fisheries and to observations for gas bubbles and seafloor.
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