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Abstract

From the most often used traps caught crayfish can escaping during the day. This reduces trapping yield. Therefore, those tools are used to the one-night catching. New tool for long-term catching was tested. The ability to retain crayfish inside a trap and the catch efficiency of this trap named Vulkan were compared to the popular trap named Evo in artificial and wild conditions. The tested crayfish traps differed significantly in their ability to retain crayfish. After four days (96 h) of observation in artificial conditions, 65.2% crayfish inserted into traps had escaped from Evo traps compared with 2.4% in the case of Vulkan traps. Evo traps had statistically significant (P<0.05) higher the catch efficiency as catch per unit effort (CPUE) than Vulkan traps during one-night catching in the lakes. Research showed that Vulkan traps effectively p revent the escape of caught crayfish also during the daylight surpassing in this case Evo traps and are better for use in long-term catch.They can be the basis for new research methods collecting crayfish not only for one-night catch but for an extended p eriod of time. Also in a commercial fishery Vulkan traps may reduce the catch effort.

Spiny-Cheek Crayfish, Faxonius limosus (Rafinesque, 1817), as an Alternative Food Source

“…Rebuilding the populations of indigenous crayfish could be aided by harvesting invasive species that may be a source of edible and non-edible raw material [9][10][11][12]. The effectiveness (yield) of these catches would be affected by the type of water reservoir, season of the year, as well as method and gear used for the catches [8,13]. However, use of spinycheek crayfish in the food industry would only be possible once studies assessing the yield and properties of crayfish meat have been conducted.…”