Aspetti qualitativi e quantitativi dei popolamenti ittici delproposto Parco Regionale dell’Ofanto

The goals of this project are the determination of the freshwater fish species assemblages of the River Ofanto in the Regional Park of Ofanto and the determination of the total fish biomass in different seasons for the survival purpose of fish eater mammals as otters. The fish components, in origins, were very scarce due to biogeographyc reasons, but now the components were enriched by several introduced aliens species. The native fauna I still well represented in the hills zone, near Ponte Romano, while above, aliens as common carps and crucian carps dominated. The total biomass varied significantly in different seasons being high in April and July and low in December.