TEMPORAL DISTRIBUTION OF PERCH (PERCA-FLUVIATILIS L) IN A LAKE-RESERVOIR (MOSELLE, FRANCE) - ANALYSIS OF CATCHES WITH VERTICAL GILL NETS

Four fishing periods within a yearly cycle between 1990 and 1991 were carried out in the lake-reservoir of Mirgenbach, lake of the nuclear p ower station in Cattenom (Moselle, France). The catches of perch (Perc a fluviatilis L.) were analyzed. In all, about 630 perch were caught i n 8 sampling stations. The analysis of seasonal catches of this carniv orous fish was made according to size and mesh; a simple correspondenc e factor analysis enabled us to establish that this species lived in d ifferent areas depending on the season.