We (Pavel Kozák a Buket Yazicioglu) attended the 2nd Symposium on Fish Introduction and Reservoir Management which was held in the Egirdir in Turkey. Presented were a plenary lecture “Crayfish Plague in the Lake Eğirdir” of authorsPavel KOZÁK, Antonín KOUBA, Seval BAHADIR KOCA, Ibrahim Diler, Jiří SVOBODA, Eva BALCAROVÁ KOZUBÍKOVÁ, Adam PETRUSEK and the oral presentation  „Using of Crayfish as Bioindicators of Water Quality.“ of authors Iryna Kuklina, Buket Yazicioglu, Pavel Kozák. We also attended the opening ceremony of a new 600m2 of crayfish production unit and the business meetings for planning of future co-operative projects.