CR

Chiemsee-Renke

Coregonus hoferi

UnknownCREUCREU

Overview

The Chiemsee-Renke (Coregonus hoferi) is an endemic whitefish species found exclusively in Lake Chiemsee in Bavaria, Germany. This silvery, streamlined fish typically reaches 20-30 cm in length and has adapted to the lake's specific depth zones and thermal conditions. As a planktivorous species, it plays a crucial role in the lake's food web by controlling zooplankton populations and serving as prey for larger predatory fish.

The Chiemsee-Renke is critically endangered due to habitat degradation and eutrophication of Lake Chiem in Bavaria, Germany. The species faces severe pressure from water quality deterioration, invasive species competition, and potential hybridization with introduced whitefish species.

Threat summary

Habitat

This species inhabits the deep, cold waters of Lake Chiemsee, particularly favoring the hypolimnion (deep water layer) during summer months where temperatures remain cool and oxygen levels are suitable. It migrates to shallower littoral zones during spawning season in late autumn and winter.

FRESHWATER· major

Frequently asked questions

Why is Chiemsee-Renke classified as Critically Endangered?
Chiemsee-Renke 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 Chiemsee-Renke is critically endangered due to habitat degradation and eutrophication of Lake Chiem in Bavaria, Germany. The species faces severe pressure from water quality deterioration, invasive species competition, and potential hybridization with introduced whitefish species.
Where does Chiemsee-Renke live?
Chiemsee-Renke occurs in Germany. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Chiemsee-Renke?
The main threats to Chiemsee-Renke 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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