The study of the impact of climate change on the fish fauna and fisheries management is a relatively young field of scientific research which has yielded very few analytical studies in the Central and Eastern European countries. This paper is the first attempt to examine the impact of this change on lake fisheries management, made based on an extensive and representative survey addressed at managers and owners of the entities authorised to use these waters for fishing and angling purposes. The conducted analyses enabled the determination of their opinions on the issues of climate change impact on the fish, selected hydrological and biological lake parameters, the possibility of use of fishing gear and its efficiency, the length of angling season, the amount of individual fish species caught by anglers and fishermen, and positive phenomena relating to climate change. Of all the phenomena arising from this change and perceived by the respondents surveyed, the growing population of the great cormorant (