Passage efficiency through fishways of species of the family Cyprinidae and their management implications for fragmented rivers.

Autor: Błońska D; Department of Ecology and Vertebrate Zoology, Faculty of Biology and Environmental Protection, University of Lodz, 90-237, Lodz, Poland. dagmara.blonska@biol.uni.lodz.pl.; Department of Life and Environmental Sciences, Bournemouth University, Dorset, Poole, BH12 5BB, UK. dagmara.blonska@biol.uni.lodz.pl., Tarkan AS; Department of Ecology and Vertebrate Zoology, Faculty of Biology and Environmental Protection, University of Lodz, 90-237, Lodz, Poland.; Department of Life and Environmental Sciences, Bournemouth University, Dorset, Poole, BH12 5BB, UK.; Department of Basic Sciences, Faculty of Fisheries, Muğla Sıtkı Koçman University, 48000, Muğla, Türkiye., Britton JR; Department of Life and Environmental Sciences, Bournemouth University, Dorset, Poole, BH12 5BB, UK.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Oct 03; Vol. 14 (1), pp. 23015. Date of Electronic Publication: 2024 Oct 03.
DOI: 10.1038/s41598-024-73965-w
Abstrakt: The contemporary management of fragmented river systems is in a trade-off between the societal benefits of instream barriers (e.g. hydropower, flood risk management) and the ecological harms of their adverse impacts on fish populations. The consequent fragmentation can be mitigated through fishway construction, with mitigation performance measured using species-specific passage rates and efficiencies. There is, however, a bias in passage efficiency studies towards diadromous fishes and, although fish of the Cyprinidae family play a significant role in the fish assemblages of rivers worldwide, their passage efficiencies are poorly understood. Here, systematic review and meta-analyses assessed the passage efficiencies of cyprinid fishes through fishways that have been measured using telemetry methods. Passive integrated transponder (PIT) telemetry was the most common evaluation method of passage efficiency due to their high read rates and relatively low costs versus alternative telemetry methods. These methods revealed cyprinid passage efficiencies were highest through vertical slot fishways and lowest through nature-like constructions, with overall passage rates comparing favourably to anadromous salmonid fishes. Fish were most active during spring and summer, with passage and associated movements often related to spawning. Passage rates of non-native fishes were also higher than for native fishes. Despite the growing acknowledgment of how fishways influence potamodromous fish dispersal and distribution in rivers, passage data remain scarce, preventing managers and policy-makers from making informed decisions on optimal passage solutions for multiple fish species in highly fragmented rivers.
(© 2024. The Author(s).)
Databáze: MEDLINE
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