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Open AccessFeature PaperArticle

Passage Performance of Technical Pool-Type Fishways for Potamodromous Cyprinids: Novel Experiences in Semiarid Environments

1
Applied Ecohydraulics Group (GEA-ecohidraulica.org), E.T.S.II.AA, University of Valladolid, 34004 Palencia, Spain
2
Departmento of. Zoology and Physical Anthropology, Universityof Murcia, 30100 Murcia, Spain
3
Group on Technology in Ecohydraulics and Conservation of Fishery and Water Resources (GETECH), Western Paraná State University (Unioeste), 85903 Toledo, Brazil
*
Author to whom correspondence should be addressed.
Water 2019, 11(11), 2362; https://doi.org/10.3390/w11112362
Received: 22 October 2019 / Revised: 6 November 2019 / Accepted: 8 November 2019 / Published: 11 November 2019
(This article belongs to the Special Issue Ecohydraulics of Pool-Type Fishways)
Endemic freshwater fish from semiarid environments are among the most threated species in the world due to water overexploitation and habitat fragmentation problems. Stepped or pool-type fishways are used worldwide to reestablish longitudinal connectivity and mitigate fish migration problems. Many of them are being installed or planned in rivers of semiarid environments, however, very few studies about fish passage performance through pool-type fishways has been carried out to date on these regions. The present work focuses on the passage performance of two potamodromous cyprinids endemic of these regions, with different ecological and swimming behavior: southern Iberian barbel (Luciobarbus sclateri) and Iberian straight-mouth nase (Pseudochondrostoma polylepis). These are assessed in two of the most common types of stepped fishways: vertical slot and submerged notch with bottom orifice fishways. Experiments were carried out during the spawning season in the Segura River (southeastern Spain), using a passive integrated transponder (PIT) tag and antenna system. Ascent success was greater than 80%, with a median transit time lower than 17 minutes per meter of height in all trials, and for both species and fishway types. Results show that both types of fishways, if correctly designed and constructed, provide interesting alternatives for the restoration of fish migration pathways in these regions. View Full-Text
Keywords: Mediterranean region; river connectivity; fishway assessment; fish motivation; ascent ability Mediterranean region; river connectivity; fishway assessment; fish motivation; ascent ability
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Sanz-Ronda, F.J.; Bravo-Córdoba, F.J.; Sánchez-Pérez, A.; García-Vega, A.; Valbuena-Castro, J.; Fernandes-Celestino, L.; Torralva, M.; Oliva-Paterna, F.J. Passage Performance of Technical Pool-Type Fishways for Potamodromous Cyprinids: Novel Experiences in Semiarid Environments. Water 2019, 11, 2362.

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