生物多样性:对欧洲鱼类的疾病威胁
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
概括
侵袭性亚洲鱼Pseudorasbora parva正在导致欧洲本土鱼类Leucaspius delineatus的高死亡率和抑制产卵. 侵入性鱼所携带的致命的非特异性寄生虫威胁到欧洲鱼类的生物多样性和水产养殖.
科学领域:
- 生态生态学 生态生态学
- 侵入性物种 生物学 生物学
- 寄生虫学的寄生虫学
背景情况:
- 引入的物种可能会破坏本地生态系统.
- 侵袭性亚洲类动物Pseudorasbora parva正在欧洲蔓延.
- 临灭绝的欧洲鱼Leucaspius delineatus面临着许多威胁.
研究的目的:
- 为了研究Pseudorasbora parva对Leucaspius delineatus的影响.
- 为了确定Pseudorasbora parva.的负面影响背后的机制.
- 评估更广泛的生态和经济影响.
主要方法:
- 对鱼群的实地观测.
- 鱼类健康和病原体的实验室分析.
- 感染病原体的鉴定.
主要成果:
- 引入Pseudorasbora parva导致Leucaspius delineatus的死亡率增加.
- 在Leucaspius delineatus的繁殖完全受到入侵物种的抑制.
- 一种致命的,非特异性的细胞内真核寄生虫,可能是由Pseudorasbora parva携带的,被确定为病因.
结论:
- 侵袭性的Pseudorasbora parva对临灭绝的Leucaspius delineatus构成严重威胁.
- 鉴定到的寄生虫可能会大大减少整个欧洲的鱼类生物多样性.
- 由于非特异性,致命的病原体对商业水产养殖的影响是相当大的.
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