Shape and target strength of vesicles of two Sargassum species common to the coastal waters of Japan
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- MINAMI Kenji
- Graduate School of Environmental Science, Hokkaido University
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- HAMANO Akira
- National Fisheries University
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- NAKAMURA Takeshi
- National Fisheries University
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- TAKAO Yoshimi
- National Research Institute of Fisheries Engineering
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- YASUMA Hiroki
- Hokkaido University
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- MIYASHITA Kazushi
- Hokkaido University
書誌事項
- タイトル別名
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- Shape and Target Strength of Vesicles of two <i>Sargassum</i> Species Common to the Coastal Waters of Japan
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抄録
The size of vesicles and amount of gas they contain is a major factor in the acoustic scattering of Sargassum plants. Here we investigate the morphological character of the vesicles and gas, and their theoretical and experimental target strength (TS) for two Sargassum species, Sargassum macrocarpum and S. siliquastrum. Both species are abundant in the coastal waters of Japan. A total of 593 vesicles were measured using a soft X-ray system, and their gas shapes were applied to two theoretical TS models (non-resonance and resonance). Experimental TS were obtained at 70 and 200 kHz using quantitative echo sounders in a freshwater tank. Gas fields were found in 418 vesicles, and the gas radius and external size of the vesicles were linearly related in both species. The theoretical TS of the non-resonance model was similar to the experimental TS of large vesicles (≥4.1 mm at 70 kHz, ≥2.8 mm at 200 kHz), whereas the theoretical TS of the resonance model was similar to the experimental TS of small vesicles (≤3.1 mm at 70 kHz, ≤1.9 mm at 200 kHz). Finally, we estimated TS-size equations according to the gas-size relationships and compared the results.
収録刊行物
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- 海洋音響学会誌
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海洋音響学会誌 37 (3), 147-155, 2010
特定非営利活動法人 海洋音響学会
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詳細情報 詳細情報について
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- CRID
- 1390001204366791808
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- NII論文ID
- 130005106038
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- NII書誌ID
- AN10299394
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- ISSN
- 18816819
- 09165835
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- NDL書誌ID
- 10769146
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可