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Invasion frustration? Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA?

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: September 10, 2026 at 09:43 PM | Dataset Last Updated: September 15, 2021 at 12:00 AM
In this report, we evaluate this hypothesis for croaking gourami Trichopsis vittata, a non-native species that has established a reproducing population, but has not successfully spread beyond its very small (5 km2) range. We suspected the inability of T. vittata to colonize new habitats may be due to biotic resistance by the native eastern mosquitofish Gambusia holbrooki.

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