Fish parasitological investigationsin Switzerland

Abstract

Fish has always had a great importance for mankindas one of the main food sources in many countries. Nowadays even more since the demand for healthy and lean protein is strongly increasing and fish canprovide exactly that. As many fish populations in nature are slowly decreasing because ofthe overfishing, more and more fisheries are being built to keep up with the increasing demand for fresh fish. In addition to fish farmingalso pet fish are becoming more and more popular in garden ponds or in aquariums.