New evidence of alternative migration patterns for two Mediterranean potamodromous species.

ABSTRACT: Iberian barbel (Luciobarbus bocagei Steindachner, 1864) and Iberian nase (Pseudochondrostoma polylepis Steindachner, 1864) are two Mediterranean potamodromous fish species known to perform annual upstream migrations to reach spring spawning grounds. In the Mondego River basin, at the Coimbra dam, migratory movement patterns and individual size structure were assessed through a video recording monitoring system installed on an upstream section of a vertical-slot fish pass. Visual census for these target species during two consecutive annual cycles (2013-2014) revealed alternative migratory patterns, with the first peak of upstream movements in autumn, for both barbel (October-November) and nase (November-December). Circadian movements of both species showed a diurnal preference, contrary to

SUBMITTER: Rato AS 

PROVIDER: S-EPMC11471790 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature