Habitat and Ecology
Lake Posta Fibreno is an elongated karstic lake with underwater springs and caves, 1.1 km long, 0.1-0.3 km wide, 0.29 km², 289 m above sea level, 15 m deep (average depth 2.5 m), about 10°C year-round and clear and well oxygenated water. Spawns close to underwater springs.
Lacustrine, sometimes entering lake tributaries. Spawns in December-January (local S. cettii population in February-March).
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Relevance to Humans and Ecosystems
The size of Lago di Posta Fibreno is only 0.29 km². It is a narrow lake 1.1 km long, 100–300 m wide, situated 289 m above sea level. The lake is in a karstic terrain and rich in underwater springs. The Fibreno trout breeds close to these springs in mid-winter. It is sympatric with the more widespread Salmo cettii (Mediterranean trout), and separated from it by the breeding time: S. cettii spawns in early spring.
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