Fish communities were investigated in five shallow Polesie lakes in summer and autumn 2000-2001. The percentage of the brown bullhead both in the total numbers (70.7-3.6%) and biomass (2.4-43%) of fish decreased with increase in lake trophic status (from meso- to hypertrophy). There was a clear reverse relationship between the density of brown bullhead in the lakes and its mean total length, individual weight and values of condition coefficient. Of the three methods of fishing, the most efficient, irrespective of the lake studied, was electro-shocking, the least efficient – the gill nets. The most selective tools were fykes, in which over 95% fish found were the brown bullhead. These tools can be recommended to control the brown bullhead numbers, especially in ecosystems located on areas protected by law.

131-140