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Can fish lifts aid upstream dispersal of the invasive red swamp crayfish (Procambarus clarkii) past high-head hydropower plants?
River Research and Applications ( IF 2.2 ) Pub Date : 2021-09-01 , DOI: 10.1002/rra.3856 José Maria Santos 1 , Susana Dias Amaral 1 , João Pádua 2
River Research and Applications ( IF 2.2 ) Pub Date : 2021-09-01 , DOI: 10.1002/rra.3856 José Maria Santos 1 , Susana Dias Amaral 1 , João Pádua 2
Affiliation
Many types of fish passage facilities have been built worldwide to mitigate river fragmentation by instream barriers and partially restore upstream movements of fish. Among these, fish lifts are a design that enables fish to pass through high-head obstacles (>15 m height) and can be considered the most cost-effective fishway. However, fishways may also be used by non-native invasive species to disperse and impact new areas and organisms upstream. As far as the authors are aware, this short communication is the first record of the red swamp crayfish (Procambarus clarkii) passing through a fish lift. The lift, built at the Touvedo hydropower plant on the Lima River (northwestern Portugal), was mainly designed for the upstream passage of diadromous fish. Fish-lift use and upstream passage of two crayfish occurred over 3 years (November 2017–October 2020) during periods of turbine shutdown and high water temperatures (18°C). In the present case, the crayfish passage should not pose a serious threat due to the limiting characteristics of the upstream lotic environment. Nevertheless, despite the small sample size, this study shows the importance of considering the passage of invasive crayfish species while planning future fishways and the need to continuously monitor such facilities to detect the passage of this and other non-native invasive species.
中文翻译:
升降机能否帮助入侵的红沼泽小龙虾(Procambarus clarkii)向上游扩散经过高水头水电站?
世界各地已经建造了许多类型的鱼道设施,以减轻河道屏障造成的河流破碎,并部分恢复鱼类的上游运动。其中,鱼梯是一种可以让鱼通过高头障碍物(>15m高度)的设计,可以认为是性价比最高的鱼道。然而,鱼道也可能被非本地入侵物种用来分散和影响上游的新区域和生物。据作者所知,这段简短的交流是红沼泽小龙虾(Procambarus clarkii) 通过鱼梯。该升降机建于利马河(葡萄牙西北部)的图韦多水电站,主要设计用于沿河鱼类的上游通道。在涡轮机停机和高水温 (18°C) 期间,在 3 年多(2017 年 11 月至 2020 年 10 月)期间,使用提鱼和上游通道发生了两只小龙虾。在本案中,由于上游流动环境的限制特性,小龙虾通道不应构成严重威胁。尽管如此,尽管样本量很小,但这项研究表明了在规划未来鱼道时考虑入侵小龙虾物种通过的重要性,以及需要持续监测此类设施以检测这种和其他非本地入侵物种的通过。
更新日期:2021-09-01
中文翻译:
升降机能否帮助入侵的红沼泽小龙虾(Procambarus clarkii)向上游扩散经过高水头水电站?
世界各地已经建造了许多类型的鱼道设施,以减轻河道屏障造成的河流破碎,并部分恢复鱼类的上游运动。其中,鱼梯是一种可以让鱼通过高头障碍物(>15m高度)的设计,可以认为是性价比最高的鱼道。然而,鱼道也可能被非本地入侵物种用来分散和影响上游的新区域和生物。据作者所知,这段简短的交流是红沼泽小龙虾(Procambarus clarkii) 通过鱼梯。该升降机建于利马河(葡萄牙西北部)的图韦多水电站,主要设计用于沿河鱼类的上游通道。在涡轮机停机和高水温 (18°C) 期间,在 3 年多(2017 年 11 月至 2020 年 10 月)期间,使用提鱼和上游通道发生了两只小龙虾。在本案中,由于上游流动环境的限制特性,小龙虾通道不应构成严重威胁。尽管如此,尽管样本量很小,但这项研究表明了在规划未来鱼道时考虑入侵小龙虾物种通过的重要性,以及需要持续监测此类设施以检测这种和其他非本地入侵物种的通过。