Presenza di Silurus glanis Linnaeus, 1758, nel bacino del fi ume Volturno (Campania)

The wels catfi sh, also called sheatfi sh (Silurus glanis L.) is expanding very rapidly throughout the italian peninsula, compared to the fi rst case in Italy in 1937; in the waters of the rivers represent a real threat to native fi sh populations. The main purpose is to report the presence of Silurus glanis in the waters of the basin of the river Volturno. Here we indicate a massive presence of young fi shes in the waters of the river Calore Irpino in the province of Avellino and Benevento, and in the river Sabato in the province of Benevento (May 2014).