EN

Steindachneridion melanodermatum

Declining

Overview

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

Steindachneridion melanodermatum faces severe population declines primarily due to dam construction across its native river systems in southern Brazil, which fragments populations and disrupts spawning migrations. Overfishing has further reduced numbers, as this large catfish is highly valued for consumption and sport fishing. Water pollution from agricultural runoff and urban development degrades the clear, fast-flowing waters this species requires for successful reproduction.

Threat summary

Habitat

This large catfish inhabits clear, fast-flowing rivers and streams in the upper Paraná River basin of southern Brazil, particularly favoring rocky substrates and deeper pools. The species requires well-oxygenated waters with minimal sedimentation for spawning and juvenile development.

FRESHWATER· major

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Frequently asked questions

Why is Steindachneridion melanodermatum classified as Endangered?
Steindachneridion melanodermatum is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Steindachneridion melanodermatum faces severe population declines primarily due to dam construction across its native river systems in southern Brazil, which fragments populations and disrupts spawning migrations. Overfishing has further reduced numbers, as this large catfish is highly valued for consumption and sport fishing. Water pollution from agricultural runoff and urban development degrades the clear, fast-flowing waters this species requires for successful reproduction.
Where does Steindachneridion melanodermatum live?
Steindachneridion melanodermatum occurs in Argentina, and Brazil. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Steindachneridion melanodermatum?
The main threats to Steindachneridion melanodermatum 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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