The Study of Bacteria on Artificially Incubated Noble Crayfish Eggs

Data on the abundance of heterotrophic bacteria on the surface of artificially incubated noble crayfish (Astacus astacus L.) eggs are presented. The highest abundance of heterotrophic bacteria was observed on crayfish juveniles (stage 1). The abundance of bacteria in the water of the incubator's system was found to be considerably lower than that on crayfish eggs, and bacteria counts on dead eggs were a 100 times lower than on healthy eggs. The abundance of pigmented bacteria on dead eggs was considerably higher than on healthy eggs. Aeromonas and Pseudomonas bacteria, constituting up to 70% of all bacteria identified, were found to be dominant on noble crayfish eggs.