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  1. 水産研究・教育機構出版物
  2. 水産研究・教育機構研究報告
  3. 第2号

魚のターゲットストレングスの高精度推定に関する研究

https://fra.repo.nii.ac.jp/records/2010770
https://fra.repo.nii.ac.jp/records/2010770
ae175393-a29e-4ee3-bed7-9fb1f5b1254c
名前 / ファイル ライセンス アクション
fra_k_2_47.pdf fra_k_2_47.pdf (1.5 MB)
license.icon
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2024-10-02
タイトル
タイトル 魚のターゲットストレングスの高精度推定に関する研究
言語 ja
タイトル
タイトル Studyon the Precise Estimation of theTarget Strength of Fish
言語 en
言語
言語 jpn
キーワード
言語 en
主題Scheme Other
主題 echo sounder; target strength; reverberationvolume; split-beam; echo trace analysis
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ departmental bulletin paper
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
著者 澤田, 浩一

× 澤田, 浩一

WEKO 517
e-Rad 30372080

en Sawada, Koichi

ja 澤田, 浩一


ja-Kana サワダ, コウイチ

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抄録
内容記述タイプ Abstract
内容記述 Fish target strength is very important as a scale factor to estimate fish abundance from echo integration results in an acoustic survey, as information to estimate fish length and species, and as a parameter to design echo sounders. In Chapter 2, several methods of target strength estimation are enumerated and the principal of fish length estimation method is presented. This chapter is the starting point of the following chapters. In Chapter 3, the precise fish target strength pattern measurement system is developed in a tank. Both the preciseness and accuracy of this system are confirmed by the comparison between the target strength pattern measurements of the artificial targets and their exact theoretical calculations. The dorsal target strengths of five species are measured in this system and the precise target strengths available for the abundance estimation are shown. In Chapter 4, the validity of the theoretical calculations based on the deformed cylinder model is confirmed. The model calculations based on the swimbladder shape obtained by a conventional soft X-ray system or a computed tomography imaging system agree well with the measurements. In Chapter 5, the indexes for the preciseness of the target strength measurement in situ are proposed and the validity of these indexes is confirmed by measurements and computer simulations. In Chapter 6, the estimation method of fish length and behavior is developed by combining the split-beam method with the echo trace analysis method. The validity of this method is confirmed by the computer simulation and the measurements in a tank and at sea. The effect of the motion of the transducer at sea is considered using a computer simulation. In the last chapter, Chapter 7, a software for the analysis of the target strength is developed. It can analyze the target strength in situ with the proposed indexes and can estimate individual fish length and behavior, seeing the echograms and selecting the arbitrary area. The actual data obtained at sea is used and the estimation results by this software agree well to the fishing results. This paper is a slightly modified version of the doctoral dissertation proposed to Tokyo University of Fisheries.
言語 en
書誌情報 ja : 水産総合研究センター研究報告
en : Bulletin of Fisheries Research Agency

巻 2, p. 47-122, ページ数 76, 発行日 2002-02
出版者
出版者 水産総合研究センター
言語 ja
ISSN
収録物識別子タイプ PISSN
収録物識別子 1346-9894
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA11589591
情報源
識別子タイプ Local
関連識別子 fra_k_2_47
関連サイト
識別子タイプ URI
関連識別子 https://agriknowledge.affrc.go.jp/RN/2010651111
関連名称 日本農学文献記事索引(AgriKnowledge)
著者版フラグ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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