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Abstract
Display activity and population size of 2 experimentally logged leks were compared with 7 untreated control leks in a coniferous area in southcentral Norway, during 1974–87. Leks were treated by thinnings and small‐scale seed‐tree‐ and clearcuttings. Number of displaying cocks increased on all leks, but the experimental lek populations increased more than the controls. Displaying cocks were either indifferent to or preferred the logged areas, and recruiting cocks established display sites at newly created group selection cuts and at the edge of seed‐tree and clearcuts. The findings indicate that moderate thinnings, leaving >500 stems/ha, and clearcuts <50 m in diameter, are acceptable cutting methods within T. urogallus leks, with the reservations that lek populations should not be smaller than 5 displaying cocks, and that surrounding habitats should contain >50% old forest.
