CR

Fibreno Trout

Salmo fibreni

UnknownVUEUVUEU

Overview

Salmo fibreni, or the Fibreno trout, is a freshwater salmonid fish, endemic to Lago di Posta Fibreno in central Italy.

Salmo fibreni faces severe threats from water abstraction and habitat modification within its extremely limited range in the Fibreno River system. The species is particularly vulnerable to pollution from agricultural runoff and urban development, which degrades water quality in its spring-fed habitat. Introduction of non-native trout species poses additional risks through competition and potential hybridization, while the species' restriction to a single watershed makes it exceptionally vulnerable to any localized environmental changes.

Threat summary

Habitat

Salmo fibreni is endemic to the cold, clear spring-fed waters of the Fibreno River system in central Italy, particularly favoring areas with stable temperatures and high dissolved oxygen levels. The species requires pristine limestone spring environments with specific water chemistry and temperature regimes that are characteristic of karstic aquifer systems.

Marine intertidal· majorWetlands (inland)· majorWetlands (inland) - Permanent rivers/streams· majorWetlands (inland) - Permanent freshwater lakes· majorRocky areas· majorCaves and subterranean habitats· major

Conservation measures underway

Site/area protectionSpecies management

Other threatened species in SALMONIDAE

VU

Coregonus subautumnalis

Declining
VU

Bourget Whitefish

Coregonus lavaretus

Unknown
VU

Fatio's Whitefish

Coregonus fatioi

Unknown
VU

Sempach Whitefish

Coregonus suidteri

Unknown

Threatened in Italy

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
VU

Arum apulum

Declining
EN

Pipizella nigriana

Unknown

Frequently asked questions

Why is Fibreno Trout classified as Critically Endangered?
Fibreno Trout 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. Salmo fibreni faces severe threats from water abstraction and habitat modification within its extremely limited range in the Fibreno River system. The species is particularly vulnerable to pollution from agricultural runoff and urban development, which degrades water quality in its spring-fed habitat. Introduction of non-native trout species poses additional risks through competition and potential hybridization, while the species' restriction to a single watershed makes it exceptionally vulnerable to any localized environmental changes.
Where does Fibreno Trout live?
Fibreno Trout occurs in Italy. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Fibreno Trout?
The main threats to Fibreno Trout are 2.1, 5.3, 7.2, and 8.1. The full IUCN-classified threat record for this species is detailed on the species page.

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