Title :
Combined underwater acoustic and radar instruments for assessing fish near seabed and mapping seabed
Author :
Manik, Henry ; Furusawa, Masahiko
Author_Institution :
Dept. of Marine Sci. & Technol., Tokyo Univ. of Fisheries, Japan
fDate :
6/24/1905 12:00:00 AM
Abstract :
An underwater acoustic and marine radar survey was conducted for the assessment of fish near the seabed and for seabed mapping. For the purpose, an underwater acoustic instrument (split beam echo sounder), and ground penetrating radar (GPR) were used around Seribu Island, Jakarta Bay. Research vessel Mina Jaya (30 GT) and various marine research instruments were employed during the survey. The results show that the fish density near seabed is 0.3 to 35.0 fish/1000 m3 with fish length up to 44.6 cm. Radar has a higher resolution for subbottom detection than high frequency acoustics.
Keywords :
aquaculture; bathymetry; geophysical techniques; oceanographic techniques; radar detection; radar resolution; remote sensing by radar; sonar detection; GPR; Jakarta Bay; Seribu Island; fish density; fish length; ground penetrating radar; marine radar survey; resolution; seabed; split beam echo sounder; subbottom detection; underwater acoustic survey; Acoustic beams; Acoustic pulses; Antennas and propagation; Aquaculture; Frequency; Ground penetrating radar; Instruments; Marine animals; Radar antennas; Underwater acoustics;
Conference_Titel :
Underwater Technology, 2002. Proceedings of the 2002 International Symposium on
Print_ISBN :
0-7803-7397-9
DOI :
10.1109/UT.2002.1002411
