J. Mar. Sci. Eng. 2013, 1(1), 3-9; doi:10.3390/jmse1010003
Article

Measurement of Diurnal Body Tilt Angle Distributions of Threeline Grunt Parapristipoma trilineatum Using Micro-Acceleration Data Loggers

1 Department of Fishery Science and Technology, National Fisheries University, Shimonoseki 759-6595, Japan 2 Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba 164-8639, Japan 3 Faculty of Life Science and Biotechnology, Fukuyama University, Fukuyama 729-0292, Japan 4 National Institute of Polar Research, Tachikawa, Tokyo 190-8518, Japan 5 Ocean Policy Research Foundation, Tokyo 105-0001, Japan
* Author to whom correspondence should be addressed.
Received: 29 May 2013; in revised form: 28 June 2013 / Accepted: 4 July 2013 / Published: 15 July 2013
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Abstract: The body tilt angle of a fish has a large effect on the acoustic target strength. For an accurate estimation of fish abundance using acoustic methods, it is necessary to measure body tilt angles in free-ranging fish. We measured diurnal body tilt angle distributions of threeline grunt (Parapristipoma trilineatum) while swimming in schools in a fish cage. Micro-acceleration data loggers were used to record (for 3 days) swaying and surging accelerations (at 16 Hz intervals) of 10 individuals among 20 forming a school in a fish cage. Time series analysis of 1-h mean body tilt angles revealed significant differences in body tilt angles between day (−7.9 ± 3.28°) and night (0.8 ± 5.89°), which must be taken into account when conducting acoustic surveys. These results will be useful for calculating the average dorsal aspect target strength (TS) of threeline grunt for accurate estimations of fish abundance.
Keywords: body tilt angle; data loggers; bio-logging; fish behaviour; fisheries acoustics; fish abundance; target strength; threeline grunt; Parapristipoma trilineatum

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MDPI and ACS Style

Tanoue, H.; Komatsu, T.; Natheer, A.; Mitani, I.; Watanabe, S.; Watanabe, Y.; Hamano, A.; Miyazaki, N. Measurement of Diurnal Body Tilt Angle Distributions of Threeline Grunt Parapristipoma trilineatum Using Micro-Acceleration Data Loggers. J. Mar. Sci. Eng. 2013, 1, 3-9.

AMA Style

Tanoue H, Komatsu T, Natheer A, Mitani I, Watanabe S, Watanabe Y, Hamano A, Miyazaki N. Measurement of Diurnal Body Tilt Angle Distributions of Threeline Grunt Parapristipoma trilineatum Using Micro-Acceleration Data Loggers. Journal of Marine Science and Engineering. 2013; 1(1):3-9.

Chicago/Turabian Style

Tanoue, Hideaki; Komatsu, Teruhisa; Natheer, Alabsi; Mitani, Isamu; Watanabe, Shinichi; Watanabe, Yuuki; Hamano, Akira; Miyazaki, Nobuyuki. 2013. "Measurement of Diurnal Body Tilt Angle Distributions of Threeline Grunt Parapristipoma trilineatum Using Micro-Acceleration Data Loggers." J. Mar. Sci. Eng. 1, no. 1: 3-9.

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