Effectiveness of fishing in shallow lakes using different methods

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The fish, as the basic element of the water ecosystem of inland reservoirs, are often the subject of research. Several papers analyze their significance in the water ecosystem and try to determine their influence on the overall performance of that system [Jeppesen et al. 1990, Scheffer et al. 1993, Starmach 1994, Bninska 2000]. The best way to evaluate how many fish there are in the reservoir is to make commercial fish catches. However, it is not always possible as the reservoir is properly used or proper fishing methods cannot be applied. That is why one of the ways to estimate lakes’ fish composition is to conduct a controlled fishing [Lagler 1978]. Specifying lakes’ ichthyofauna by the method of fish sampling is usually conducted by using one or, more rarely, a couple of fish catching methods. The basic and most often used methods while conducting a biological research of a lake are “gill net” fishing as well as fishing using electrical fish catching tools [Hickley 1990, Zalewski an

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