Douro nase
Pseudochondrostoma duriense
Pseudochondrostoma duriense, the Northern straight-mouth nase, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related species. This species is endemic to the northern Iberian Peninsula in Spain and Portugal.
2
Countries
Photo: iNaturalist: (c) Cesar Pollo, some rights reserved (CC BY-NC), uploaded by Cesar Pollo
Taxonomy & Classification
Kingdom
Animalia
Phylum
Chordata
Order
Cypriniformes
Family
Cyprinidae
Genus
Pseudochondrostoma
Douro nase belongs to the family Cyprinidae, order Cypriniformes, within the unknown class.
Species Profile
Pseudochondrostoma duriense, the Northern straight-mouth nase, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related species. This species is endemic to the northern Iberian Peninsula in Spain and Portugal.
The Douro nase faces significant threats from habitat degradation and fragmentation due to dam construction, water extraction, and pollution in the Douro River basin. Climate change and altered flow regimes further compromise water quality and spawning habitats essential for this endemic cyprinid's survival.
Key Facts
Habitat & Distribution
Endemic to the Douro River basin in northwestern Spain and northern Portugal, inhabiting clear, well-oxygenated rivers and streams with rocky or gravel substrates. Prefers flowing waters with moderate to fast currents, typically in montane and submontane reaches of the river system.
Threats
Dam construction and river fragmentation
Water extraction and flow alteration
Climate change and drought
Habitat degradation and sedimentation
Water pollution from agricultural and urban runoff
National vs Global Threat Status
How this species is assessed at the national level compared to its IUCN global status (VU).
| Country | National Status | Global Status | Comparison |
|---|---|---|---|
| EU | VUVulnerable | VUVulnerable | Same |
| EU | VUVulnerable | VUVulnerable | Same |
National Red List data sourced from the National Red List Project (nationalredlist.org, ZSL) and country-specific Red List authorities.
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
National Red Lists: ZSL (2025). National Red List. Zoological Society of London. Available at: https://www.nationalredlist.org
This page: SpeciesRadar (2025). Douro nase (Pseudochondrostoma duriense). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/douro-nase