New evidence of alternative migration patterns for two Mediterranean potamodromous species

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,...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2024-10, Vol.14 (1), p.23910-16, Article 23910
Main Authors: Rato, Ana Sofia, Alexandre, Carlos M., Pedro, Sílvia, Mateus, Catarina S., Pereira, Esmeralda, Belo, Ana F., Quintella, Bernardo R., Quadrado, Maria F., Telhado, Ana, Batista, Carlos, Almeida, Pedro R.
Format: Article
Language:English
Subjects:
631/158/2039
631/158/856
Animal Migration - physiology
Animals
Annual cycles
Basins
Circadian rhythms
Connectivity
Cyprinidae - physiology
Efficiency
Fish migration
Habitats
Humanities and Social Sciences
Migratory species
Monitoring systems
multidisciplinary
Regression analysis
River basins
Rivers
Science
Science (multidisciplinary)
Seasons
Spawning
Spawning grounds
Temperature preferences
Upstream
Water shortages
Water supply
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 what is usually described for these species. Size structure analysis for individuals of both species showed significant intra-annual differences in the size of migrating fish. Boosted regression trees models applied to the 2013–2014 visual count data identified flow and temperature as the most influential environmental predictors, triggering both species’ movements in each direction in the study years. These results provide novel information on the timing of the migratory movements of these potamodromous fish, which can be used to adapt current management and conservation measures to the specificities of their migratory behaviour.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-74959-4