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シオミズツボワムシへの毒性を指標とした Karenia mikimotoi 赤潮の貝類へい死リスクの評価
https://fra.repo.nii.ac.jp/records/2010428
https://fra.repo.nii.ac.jp/records/2010428958e7677-e01a-4ca7-9cf0-f329ea02dce6
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
北辻ら 塩水ツボワムシへの毒性を指標としたKarenia mikimotoi赤潮.pdf (1.8 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2024-07-25 | |||||
| タイトル | ||||||
| タイトル | シオミズツボワムシへの毒性を指標とした Karenia mikimotoi 赤潮の貝類へい死リスクの評価 | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Brachionus plicatilis; Dinophyceae; harmful algal bloom species; Karenia mikimotoi; lethal effect on rotifers | |||||
| 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 | journal article | |||||
| 著者 |
北辻, さほ
× 北辻, さほ× 湯浅, 光貴× 紫加田, 知幸× 山﨑, 康裕 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The dinoflagellate Karenia mikimotoi, recognised as a harmful algal bloom (HAB) species, induces mass mortality among aquacultured fish and molluscan shellfish in coastal areas worldwide. Despite numerous studies examining the mechanism behind the lethal effects of K. mikimotoi on marine organisms, the exact toxicity mechanism remains unclear. Therefore, developing a method for readily assessing the toxicity of dinoflagellates collected from the field is crucial. While previous investigations have used the rotifer Brachionus plicatilis to evaluate the toxicity of HAB species, a comprehensive verification of K. mikimotoi, especially in its natural cell state, has not been conducted. Therefore, we aimed to demonstrate the efficacy of the rotifer toxicity test for K. mikimotoi. Initially, we investigated the toxic effects of three culture strains of K. mikimotoi (IMR4, KU9, and Km69-9ax) on juvenile abalones (Haliotis discus discus and H. gigantea) and the rotifer B. plicatilis. Exposure tests with juveniles of abalone (exposure density: 5.0–5.3×104 cells mL-1) and rotifers (exposure density: 103 cells mL-1) revealed that IMR4 significantly reduced the survival rate of juvenile H. discus discus (p<0.05) and H. gigantea (p<0.01), whereas KU9 and Km69-9ax exhibited no toxicity. The rotifer survival rate was lowest in the group exposed to the IMR4 strain (p<0.001), followed by those exposed to KU9 (p<0.001) and Km69-9ax strains (p<0.01). Rotifer survival decreased in an exposure density-dependent manner during IMR4 toxicity tests, and rotifers were killed even at a cell density of 10 cells mL-1. Consequently, we classified the IMR4 strain as virulent and the KU9 and Km69-9ax strains as attenuated. Subsequently, no toxicity to rotifers was observed in groups exposed to the culture supernatant, ruptured cell suspension, heat-treated cell suspension, or non-contact conditions. However, the rotifer survival rate significantly decreased in the group exposed to the intact cell suspension of the IMR4 strain (p<0.001). Finally, we investigated the effects of natural seawater collected on 5th and 6th August, 2022 from the Yatsushiro Sea, which contained K. mikimotoi cells on H. discus discus and rotifers. Both juvenile H. discus discus and rotifers died rapidly after exposure to red-tide seawater of K. mikimotoi. Our findings indicate that the rotifer toxicity test can assess the toxicity of K. mikimotoi on mollusc shellfish with high sensitivity. | |||||
| 言語 | en | |||||
| 書誌情報 |
ja : 日本プランクトン学会報 巻 71, 号 1, p. 1-9, ページ数 9, 発行日 2024-02-25 |
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| 出版者 | ||||||
| 出版者 | 日本プランクトン学会 | |||||
| 言語 | ja | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0387-8961 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | EISSN | |||||
| 収録物識別子 | 2434-0839 | |||||
| DOI | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.24763/bpsj.71.1_1 | |||||
| 情報源 | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | Local | |||||
| 関連識別子 | 23343098 | |||||
| 言語 | ja | |||||
| 関連名称 | 水産技術研究所 環境・応用部門 環境保全部 | |||||
| 関連サイト | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.jstage.jst.go.jp/article/bpsj/71/1/71_1/_article/-char/ja | |||||
| 言語 | ja | |||||
| 関連名称 | J-STAGE | |||||
| 著者版フラグ | ||||||
| 出版タイプ | SMUR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_71e4c1898caa6e32 | |||||
