Abstract
Abstract – The effect of selective harvest of large pike on number of middle‐sized pike was tested in a small, eutrophic lake in SE Norway. The pike population was estimated using a mark–recapture method in two different periods: before (1980–1983) and during the manipulation of the pike population (2004–2006). After an extensive size selective harvest of large pike (≥65 cm) in 2004, the number of pike in length‐class 45–65 cm, mainly 3+ pike, increased significantly from 2004 to 2005. The number in this length‐class was even higher in 2006. Since 2+ pike was part of the diet of large pike, the increase in number of 3+ pike in 2005 and 2006 is probably due to reduced consumption of 2+ pike, following the substantial selective removal of large pike in 2004 and 2005. To maintain a high annual survival of young pike, a selective exploitation of large pike has to be carried out annually.
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