Portugese nase
CR

Portugese nase

Iberochondrostoma lusitanicum

Unknown

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

Overview

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

The Portuguese nase faces severe threats from habitat degradation and fragmentation of its freshwater river systems. Dam construction, water extraction, and pollution have significantly reduced suitable habitat and isolated populations, while invasive species compete for resources and alter ecosystem dynamics.

Threat summary

Habitat

Endemic to freshwater river systems in Portugal, particularly the Tagus and Sado river basins. Inhabits clear, flowing waters with rocky or gravel substrates in both main river channels and tributaries.

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
VU

Helictochloa hackelii

Declining
CR

Madeiran Land Snail

Craspedaria moniziana

Declining
EN

Double Spleenwort

Asplenium anceps

Declining

Frequently asked questions

Why is Portugese nase classified as Critically Endangered?
Portugese nase is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. The Portuguese nase faces severe threats from habitat degradation and fragmentation of its freshwater river systems. Dam construction, water extraction, and pollution have significantly reduced suitable habitat and isolated populations, while invasive species compete for resources and alter ecosystem dynamics.
Where does Portugese nase live?
Portugese nase occurs in Portugal. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Portugese nase?
The main threats to Portugese 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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