魚群分布に関するSV値の時系列解析について

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  • Studies on improvement of accuracy for hydro Acoustic Fish Assessment System. II Analysis for Volume Scattering Strength which is related to the abundance of fish stocks by Time Series Analysis.
  • 音響による魚群量計測の精度改善に関する研究　ＩＩ　　魚群分布に関するＳＶ値の時系列解析について
  • ギョグン ブンプ ニ カンスル SVチ ノ ジケイレツ カイセキ ニ ツイテ

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In the former paper, the author described the results of simulation and fundamental experiments by using Frequency Diversity Method which is a new data processing technique for Acoustic Fish Assessment System.<br> In this paper, we describe the Statistical Characteristics of Volume Scattering Strength at the Frequency Domain by using the above equipment.<br> The main results obtained are summarized as follows-<br> The Power Spectrum of SV value is concentrated upon low Frequency Band.<br> The distribution of the abundance of fish stocks is divided into two parts by 33°02.0'N line in the square-sea area from 33°01.7'N, 33°02.6'N, 131°55.7'E, 131°47.8'E.<br> SV value which is measured by the sea bottom tracking layer is more conductive to SV value which is measured by the whole layer than the one which is measured by the upper layer.<br> Time Series Analysis is effective against the analysis of the abundance of fish stocks.

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