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Fishway with two entrance branches: Understanding its performance for potamodromous Mediterranean barbels
Author(s) -
BravoCórdoba F. J.,
SanzRonda F. J.,
RuizLegazpi J.,
Fernandes Celestino L.,
Makrakis S.
Publication year - 2018
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1111/fme.12260
Subject(s) - barbel , fish migration , environmental science , fish <actinopterygii> , weir , fishery , hydrology (agriculture) , mediterranean climate , ecology , geography , biology , engineering , geotechnical engineering , cartography
Many fish passes have been built across the world in recent years. This study analyses the performance of a modified type of pool and weir fishway with two access branches, using passive integrated transponder telemetry. A circum‐Mediterranean barbel, Luciobarbus bocagei (Steindachner, 1864), was chosen as the target species. Both hydraulic values (flow and volumetric energy dissipation) and biological parameters (attraction, entrance and passage success) were measured in the fishway, these being related to the environmental variables affecting upstream fish movement. Flow discharge, water temperature and atmospheric pressure were important for fish entering the fishway. There was no preference between path routes, even though the main discharge was concentrated in the turbine channel. This type of fishway design could be an alternative for the conservation of fish populations where multiple fish approach options are possible.