Austrolebias viarius
Overview
Austrolebias viarius is a small, colorful annual killifish endemic to temporary wetlands in Uruguay and southern Brazil. Males display vibrant blue and yellow coloration during breeding season, while females are more subdued in appearance. These fish play a crucial role in temporary pond ecosystems as both predators of invertebrates and prey for birds and larger fish.
Austrolebias viarius faces severe threats from habitat destruction due to agricultural expansion, urban development, and wetland drainage in its limited range. The species' dependence on temporary pools makes it particularly vulnerable to hydrological changes and pollution from agricultural runoff.
Habitat
This killifish inhabits shallow, temporary pools and seasonal wetlands that fill during rainy periods and dry completely during drought seasons. These ephemeral water bodies are typically found in grassland depressions with muddy substrates that preserve the species' drought-resistant eggs.
Other threatened species in Rivulidae
Threatened in Uruguay
Frequently asked questions
Why is Austrolebias viarius classified as Endangered?
Where does Austrolebias viarius live?
What are the main threats to Austrolebias viarius?
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