Abstract
During the period 1990-93 the presence of the otter (Lutra lutra) in Abruzzo region (central Italy) has been regularly recorded on the Orta river; some signs were also found on the Vella river only in 1993. Eight rivers were investigated in order to cvaluate the habitat suitability for the otter; an index of suitability was calculated considering the following parameters: riparian vegetation cover, water quality and antropic pressure. About 1/3 of 355 km of river was considered suitable for the species. The reinforcing of the native otter population should be considered in combination with the restoration of otter habitats.
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