INVESTIGATION OF VALVE OPENING-CLOSING RESPONSES OF BRACKISH WATER CLAM CORBICULA JAPONICA EXPOSED TO ENVIRONMENTAL STRESS
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- TSUCHIYAMA Miki
- 茨城大学大学院 理工学研究科博士前期課程都市システム工学専攻
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- WU Qingxu
- 茨城大学大学院 理工学研究科博士後期課程社会インフラシステム科学専攻
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- SUZUKI Jumpei
- 電力中央研究所 環境科学研究所水域環境領域
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- FUJITA Masafumi
- 茨城大学 理工学研究科都市システム工学領域
Bibliographic Information
- Other Title
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- 環境ストレスに曝された汽水性二枚貝ヤマトシジミの開閉運動の評価
- カンキョウ ストレス ニ サラサレタ キスイセイ ニマイガイ ヤマトシジミ ノ カイヘイ ウンドウ ノ ヒョウカ
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Abstract
<p> The present study developed the method of measurement and estimation of valve opening-closing responses in brackish clam Corbicula japonica using a hall element sensor in order to comprehensively understand biochemical- and individual-level responses against environmental stress. Using a relationship between hall element sensor–magnet distance and voltage for each individual, valve distance can be estimated. The clam exposed to municipal wastewater with 5× dilution showed that valve-movement frequency was increased (p<0.05) and valve-opening duaration was decreased (p<0.05), while valve-opening amplitude and valve-opening degree were not changed (p>0.05). We conclude that valve opening-closing responses can be a good individual-level indicator to assess the clam behavior exposed to environmental stress.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 76 (2), I_1051-I_1055, 2020
Japan Society of Civil Engineers