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生物多様性:欧州の魚類に対する病気の脅威
Rodolphe E Gozlan1, Sophie St-Hilaire, Stephen W Feist
1Centre for Ecology & Hydrology, Winfrith Technology Centre, Dorchester, Dorset DT2 8ZD, UK. reg@ceh.ac.uk
Nature
|June 24, 2005
まとめ
アジアの侵入性サイプリニッドであるPseudorasbora parvaは,ヨーロッパ産の魚であるLeucaspius delineatusの高い死亡率を引き起こし,産卵を阻害しています. 侵入魚によって運ばれる致命的で非特異的な寄生虫は,ヨーロッパの魚の生物多様性と水産物を脅かしています.
科学分野:
- エコロジー エコロジー エコロジー
- 侵入種 生物学 侵入種 生物学
- 寄生虫学とは,寄生虫学である.
背景:
- 導入された種は,ネイティブの生態系を混乱させる可能性があります.
- 侵襲的なアジア系サイプリニドであるPseudorasbora parvaがヨーロッパに蔓延しています.
- 絶滅危惧種であるヨーロッパサイプリニド (Leucaspius delineatus) は,多くの脅威に直面しています.
研究 の 目的:
- Pseudorasbora parvaがLeucaspius delineatusに与える影響を調査する.
- Pseudorasbora parva.のネガティブな効果の背後にあるメカニズムを特定する.
- より広範な生態学的および経済的影響を評価する.
主な方法:
- 魚群のフィールド観測.
- 魚の健康と病原体の実験室分析.
- 感染病原体の識別. 感染病原体の識別.
主要な成果:
- Pseudorasbora parvaの導入は,Leucaspius delineatusの死亡率の増加につながる.
- Leucaspius delineatusの産卵は侵入種によって完全に抑制されています.
- Pseudorasbora parvaによって運ばれる可能性が高い,致死性のある非特異的な細胞内ユーカリオット寄生虫が原因であると特定されています.
結論:
- 侵襲的な Pseudorasbora parvaは,絶滅危惧種の Leucaspius delineatus.に深刻な脅威をもたらしています.
- 特定された寄生虫は,ヨーロッパ全土で魚の生物多様性を大幅に減少させる可能性がある.
- 非特異的で致命的な病原体による商業水産物栽培への影響は大きい.
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