Preliminary study of ichthyofauna in extensively exploited Głębokie Uścimowskie Lake with abnormal fish structure.
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The aim of research was to define the structure of ichthyofauna in a shallow, eutrophic lake where stocking and commercial catches were no conducted for over a dozen of years. In years 2008–2011 control fish catches were made with the use of gill nets. Based on this catches, 10 species of fish were found (in total) in this lake. During entire period of research 3 species of fish: Prussian carp, roach and brown bullhead were dominated in biomass and quality. During four years of research an upward trend in quantity and total biomass in Prussian carp population was observed. Caught fishes were got rather small and because of that they did not show any economic value. The ichthyofauna of Głębokie Uścimowskie Lake had untypical structure, with total absence of predator fish species. This abnormal in trophic structure probably had a significant impact on fish growth parameters such as small size and mass below 0.2 kg.
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Rekord utworzony: | 31 maja 2011 13:39 |
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Ostatnia aktualizacja: | 19 kwietnia 2022 08:33 |