Guadian nase
VU

Guadian nase

Pseudochondrostoma willkommii

UnknownVUEUVUEU

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Pseudochondrostoma_willkommii

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

The Guadiana nase faces severe pressure from water abstraction and dam construction throughout its native river systems in the Iberian Peninsula. Habitat degradation from agricultural runoff and urban pollution has significantly reduced water quality in critical spawning areas. Climate change-induced droughts are intensifying water scarcity, further fragmenting already isolated populations across the Guadiana and adjacent river basins.

Threat summary

Habitat

The Guadiana nase inhabits clear, fast-flowing rivers and streams with rocky or gravel substrates in the Iberian Peninsula. It prefers well-oxygenated waters with moderate to strong currents, typically found in the middle and upper reaches of river systems.

FRESHWATER· major

Other threatened species in Cyprinidae

Iberian-RoachVU

Iberian-Roach

Squalius alburnoides

Unknown
French naseVU

French nase

Parachondrostoma toxostoma

Unknown
VU

Menderes barbel

Luciobarbus kottelati

Unknown
Ohrid spirlinVU

Ohrid spirlin

Alburnoides ohridanus

Unknown

Threatened in Portugal

Calidris ferrugineaVU

Calidris ferruginea

Declining
CR

Phytosus schatzmayri

Declining
Anthophore estivaleCR

Anthophore estivale

Anthophora aestivalis

Unknown
Muscidideicus praetextatusCR

Muscidideicus praetextatus

Unknown

Frequently asked questions

Why is Guadian nase classified as Vulnerable?
Guadian nase is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. The Guadiana nase faces severe pressure from water abstraction and dam construction throughout its native river systems in the Iberian Peninsula. Habitat degradation from agricultural runoff and urban pollution has significantly reduced water quality in critical spawning areas. Climate change-induced droughts are intensifying water scarcity, further fragmenting already isolated populations across the Guadiana and adjacent river basins.
Where does Guadian nase live?
Guadian nase occurs in Portugal, and Spain. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Guadian nase?
The main threats to Guadian nase are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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