By the decision of Polish hunters, from the Polish Hunting Club of Canada, their observations from hunting and forest vistas they will be free, on paper, for those who love the natural environment and the world of animals, and above all for the offspring!
If the beavers were in the nature of their system, although a bit of a rat approach to life, then the human population would be much worse. It would be, through them, one more element, with which a man would constantly increase. What a man is, I do not have to justify it in this place, but when giving the beavers a little chance in the form of a small descent of people from the threshold of civilization shaped by them, then one would notice their significant advantage. This hypothetical approach has its justification, because it has been confirmed many times by life itself.
Under Canadian conditions, the phenomenon of "beaver's interference" in the human headquarters is negligible due to the huge spaces that can be used by beavers while living in full wildness. The Canadian population density is 3.6 people / km2, and in the province of Ontario, it varies in about 10 people / km2. In Poland, however, the "phenomenon of beaver’s interference" is felt by people living in rural areas, especially those where there are a lot of water reservoirs and watercourses in the form of small streams and streams. For obvious reasons, these are water and marsh areas. At the Polish population density, which is around 125 people / km2, and with the occurrence of over 22 thousand beavers in Poland, this "phenomenon" has turned into a problem of state weight, and this is due to enormous damage in the country, resulting from the continuous spread of the beaver population. Being directly interested and at the same time as an observer of this "phenomenon" in the Świętokrzyskie Voivodship, I noticed that before my eyes there was something unbelievable, caused by the expansion of wild animals to the natural environment. On the example of the said voivodship and on the basis of the existing circumstances related to the protection and re-introduction of beavers, there were unpredictable natural consequences and economic consequences which became unrealizable.
As a hunting ecologist after the specialization obtained at the Jagiellonian University and also as a lover of hunting topics, I decided to explore this issue from the practical point of view. As a result of such a decision, I have established cooperation with the Research Institute of the Jagiellonian University in Cracow headed by prof. Dr hab. Bogusław Bobek and prof. Dr hab. Virgil Żurowski - head of the Research Team on Non-Domestic Animals Breeding at the Institute of Genetics and Animal Breeding of the Polish Academy of Sciences. In this particular case, my personal commitment was that I had to find the right biotope for settling beavers. This took place in the early eighties, until the re-introduction in October 1985, that is, the admission of four pairs of beavers / on the Czarna River near Raków 40 km from Kielce / caught in the Suwalki region. Until 2002, the population of these animals exceeded all expectations by their numbers. There were over 600 of them at that time. Already in the mid-nineties, receivables due to compensations for damage caused to beavers, reached several dozen million zlotys in this province. And these damages / set according to art / were not possible to implement on such a large scale. And this was mainly due to beavers destroyed by beavers for fish farming.
In these reservoirs, beavers most often destroyed the water barrier system, i.e. dikes, as a result of which the owners of fish farms suffered huge losses. These losses resulted in the vast majority of unexpected fish ledges from these basins to the rivers, due to beavers made by beavers, connecting the breeding ponds with the current of the nearby river. Not infrequently, there were cases and cases where individual compensation exceeded well over a million zlotys. After refusing to pay for the estimated damages, there were also those who applied for them to the Court. As a result of this behavior, many fish farmers remained only a sentence in their hands, or a court bailiff with this sentence, who could only "fish" for these fish in a nearby river. On the other hand, these breeders, which negotiated the amount of compensation with the relevant Department of Environmental Protection of the University of Warsaw, that is with the Voivode, most often received it in the amount of about 10%. These 10% of the compensation awarded in a strange way and for incomprehensible reasons were quickly accepted. As a result of such circumstances, the repeatability of the damage caused by "beavers" was surprisingly regular and their value, as before -very high. Compensations for reported damages, despite authoritative cost estimates, were only negotiated, and payments for lost property did not exceed the indicated 10% of the actual amount due. In the summary of this thread, you can only say that in this case beavers definitely defeated man and not only on the plane of the natural environment, but also on this "second" battlefield, as you probably guess.