Relaxed attitude towards spreading of alien crayfish species affects protection of native crayfish species: case studies and lessons learnt from a Fennoscandian viewpoint

IF 0.8 Q4 MARINE & FRESHWATER BIOLOGY
J. Jussila, L. Edsman
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引用次数: 4

Abstract

The spreading of the alien signal crayfish (Pacifastacus leniusculus) is posing an ongoing threat to native European crayfish species in Fennoscandia, like the native noble crayfish (Astacus astacus). The signal crayfish is commonly a chronic carrier of the crayfish plague (Aphanomyces astaci), thus, in addition to being more competitive than noble crayfish, it also has a competitive advantage in this disease over the noble crayfish. The challenges rising from the introduction of the alien signal crayfish to Sweden, Finland and finally also Norway, are similar in nature. The licensed and unlicensed spreading of this species also has a similar history in these countries. In this paper we describe some of the patters of the spread of alien signal crayfish and highlight the detrimental nature of an alien crayfish, accompanied by a highly virulent disease, to native Fennoscandian crayfish and also to native Fennoscandian ecosystems. A halt to the further spreading of alien signal crayfish in Fennoscandia is the only means to ensure successful conservation outcomes for the noble crayfish.
对外来小龙虾物种传播的放松态度影响了对本地小龙虾物种的保护:案例研究和从芬诺斯坎迪观点吸取的教训
外来信号小龙虾(Pacifastacus leniusculus)的传播正在对芬诺斯坎迪亚本土的欧洲小龙虾物种构成持续的威胁,比如本土的高贵小龙虾(Astacus Astacus)。信号小龙虾通常是小龙虾鼠疫(Aphanomyces astaci)的慢性携带者,因此,它除了比贵族小龙虾更具竞争力外,在这种疾病中也比贵族小龙虾具有竞争优势。从引进外来信号小龙虾到瑞典、芬兰,最后到挪威,所面临的挑战在本质上是相似的。在这些国家,该物种的许可和未经许可的传播也有类似的历史。在本文中,我们描述了外来信号小龙虾的一些传播模式,并强调了外来小龙虾的有害性质,伴随着一种高度致命的疾病,对当地的芬诺斯坎德小龙虾和当地的芬诺斯坎德生态系统。阻止外来信号小龙虾在芬诺斯坎迪亚的进一步扩散是确保这种尊贵小龙虾成功保护的唯一手段。
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来源期刊
Freshwater Crayfish
Freshwater Crayfish MARINE & FRESHWATER BIOLOGY-
CiteScore
2.70
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