bermejuela
VU

bermejuela

Achondrostoma arcasii

UnknownVUEUVUEU

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

Overview

Achondrostoma arcasii, termed the bermejuela, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which includes the daces. Eurasian minnows and related fishes. This species is endemic to the northern Iberian Peninsula.

The bermejuela faces significant threats from habitat degradation and water pollution in its native river systems across the Iberian Peninsula. Dam construction and water extraction have fragmented populations and altered natural flow regimes, while agricultural runoff and urban pollution continue to degrade water quality in critical spawning and feeding areas.

Threat summary

Habitat

Endemic to clear, well-oxygenated rivers and streams in the Duero and Tagus river basins of the Iberian Peninsula. Prefers rocky substrates and moderate to fast-flowing waters with abundant vegetation cover.

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 bermejuela classified as Vulnerable?
bermejuela 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 bermejuela faces significant threats from habitat degradation and water pollution in its native river systems across the Iberian Peninsula. Dam construction and water extraction have fragmented populations and altered natural flow regimes, while agricultural runoff and urban pollution continue to degrade water quality in critical spawning and feeding areas.
Where does bermejuela live?
bermejuela 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 bermejuela?
The main threats to bermejuela 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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