Long-term investigation on fish migration patterns between pre-alpine lakes and their major tributaries with special focus on protected species within SAC areas.
Conference Paper 9th ISE 2012, Vienna. (PDF)
In the designated SAC (Special Area of Conservation) site“Mond-und Attersee” (comprising two large pre-alpine lakes in Upper Austria and the mouths of their major tributaries) the spawning migration of the protected species pearlfish (Rutilus meidingeri) and Danube bleak (Alburnus mento) was investigated in the years 2004 and 2010. For this purpose, a dynamic fishweir with an integrated trap for catching upstream migrating fish was installed near the mouths of the respective rivers. The main factor correlating with the spawning migration turned out to be the water temperature of the rivers. Furthermore, differences between sexes were found concerning body length and weight as well as the main immigration period into the streams.