Effectiveness of fishways on the Pinka Stream and the Rába River, Central Europe: An evaluation with species from the order Cypriniformes

IF 1.7 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
Péter Sály, Márton Sallai, Zoltán Sallai
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Abstract

This study assessed the functional effectiveness in terms of passage proportion of three fishways, one nature‐like bypass, one partly nature‐like bypass and partly technical pool‐type and one completely technical, on the Pinka Stream and Rába River in Western Hungary. Radio frequency identification with passive integrated transponder tagging was used to collect data on the upstream passage. A total of 2976 tagged individuals were included in the study; 2863 individuals were either barbel (Barbus barbus), nase (Chondrostoma nasus) or chub (Squalius cephalus), which were chosen as model species, and 113 individuals belonged to four other species. There were 540 individuals of the model species and 18 individuals of the other species detected while successfully ascending one of the fishways. The time‐to‐event (survival) analysis of the data of the model species revealed significant species‐specific differences in passage probability between the fishways. The passage probabilities of the barbel were the highest, and those of the nase were the lowest at all three fishways. The findings demonstrate that single‐species evaluations can lead to incorrect conclusions on fishway effectiveness. Technical fishways can be as effective as nature‐like ones, and hybrid solutions (technical fishways combined with nature‐like bypasses) can function as well. The limitations of the study and recommendations for further evaluations are also discussed.
中欧平卡河和拉巴河鱼道的有效性:对鲤形目鱼类的评估
这项研究评估了匈牙利西部平卡溪和拉巴河上三条鱼道的功能效果,包括一条自然类旁通鱼道、一条部分自然类旁通鱼道和部分技术性水池鱼道以及一条完全技术性鱼道。采用射频识别与无源集成转发器标签收集上游通过量的数据。共有 2976 个被标记的个体被纳入研究;其中 2863 个个体是鲃(Barbus barbus)、鲶(Chondrostoma nasus)或鲢(Squalius cephalus),它们被选为示范物种,113 个个体属于其他四个物种。在成功登上其中一条鱼道时,共检测到 540 个模式物种个体和 18 个其他物种个体。对模型物种的数据进行的时间-事件(存活率)分析表明,不同鱼道之间物种的通过概率存在显著差异。在所有三条鱼道上,鲃的通过概率最高,濑鱼的通过概率最低。研究结果表明,单一物种评估可能会导致对鱼道有效性得出错误的结论。技术性鱼道与自然性鱼道同样有效,混合解决方案(技术性鱼道与自然性鱼道相结合)也能发挥同样的作用。研究的局限性和进一步评估的建议也在讨论之列。
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来源期刊
River Research and Applications
River Research and Applications 环境科学-环境科学
CiteScore
4.60
自引率
9.10%
发文量
158
审稿时长
6 months
期刊介绍: River Research and Applications , previously published as Regulated Rivers: Research and Management (1987-2001), is an international journal dedicated to the promotion of basic and applied scientific research on rivers. The journal publishes original scientific and technical papers on biological, ecological, geomorphological, hydrological, engineering and geographical aspects related to rivers in both the developed and developing world. Papers showing how basic studies and new science can be of use in applied problems associated with river management, regulation and restoration are encouraged as is interdisciplinary research concerned directly or indirectly with river management problems.
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