Abstract
Management of the piscivorous fish stocks plays a major role in combining water quality management and sustainable fisheries management. From 1994 to 1996 and in 1998, young-of-the-year (YOY) pike Esox lucius were stocked in different numbers in the course of a biomanipulation project in Lake Feldberger Haussee. Since 1997, population development, growth and food composition of pike have been studied. The fish stocked in 1995 were dominant within the population. Pike showed rapid growth, indicating a high food consumption. The predation pressure was mainly directed towards roach Rutilus rutilus and small perch Perca fluviatilis, the main planktivores. Natural recruitment was, however, low and the pike catches have drastically declined since 1996. Low recruitment is a problem that may require new stocking measures. Removal of larger pike by fishing would improve the survival of newly stocked fish. The application of stocking, protection and fishing in lake management is discussed.
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