River Orco in Noasca (Italy) fly fishing
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According to the tenant of the no kill area, the stocking of brown trout is done only with genetic material coming from this valley by squeezing adult female for eggs and male for seed. The hatchery is located a few kilometer downstream, trout fingerlings are are released into the water when they reach the size of 10-12 cm. (about 4-5 inches).