Acta Ichthyologica et Piscatoria 21(2): 65-74, doi: 10.3750/AIP1991.21.2.08
The effect of exploitation on the level of catches and effectiveness of pikeperch exploitation in lakes
expand article infoA. Bonar
Open Access
Pikeperch catches amounted on the average to 2.92 kg/ha in 1970-1985. The analyses embraced 52 lakes of total area 16 125 ha. It was found that the level of pikeperch catch depended on the intensity of exploitation (rxy = 0.588) and stock size (rxz = 0.582), the latter being assessed using a coefficient of the effectiveness of exploitation. This coefficient, calculated jointly for seines and gill nets, was 0.22 kg/UE, varying from 0.06 to 0.64 kg/UE. No statistically significant relation was found between exploitation intensity and the coefficient of effectiveness of pikeperch exploitation.