Determination of growth and reproduction properties of freshwater crayfish (Astacus leptodactylus, Eschscholtz, 1823) in Eğirdir Lake-Türkiye

This study was carried out between june 2013 and june 2014 in eğirdir lake. the length, weight, sex composition, length-weight relationship, catch efficiency, moulting season, reproductive period and fecundity of crayfish were determined in eğirdir lake. in this study, total 3008 crayfish were caught and 2456 of those crayfish were determined as 106.31 mm and 40.33 g, respectively. regression equation of length-weight relationship was found as log w=-3.2648+2.7918x log cl and regression coefficient was determined as r^2=0.9016. it was found to be negative allometric growth in both males and females. the female-male ratio of population was determined as 0.75/1.00. the mean egg number and egg diameter were determined as 309 and 2.53 mm respectively.