Danube Crayfish Astacus leptodactylus (Eschscholtz, 1823) from Ţaga Mare Lake – Size and Population Structure

Cocan Daniel, Iulius Rotar, Luisa Andronie, Octavian Negrea, Călin Laţiu, Radu Constantinescu, Camelia Răducu, Miresan Vioara
2015 Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies  
In this study the structure of the Danube crayfish (Astacus leptodactylus) population from Ţaga Mare Lake, Cluj County was analyzed. According to the study results, three age categories (2+, 3+ and 4+) were identified for the Danube crayfish specimens. Numerically, females are more numerous than males, the sex ratio between males and females being as follows: SR2 + = 0.33; SR3 + = 0.33; SR4 + = 0.86. In terms of body size, males are better developed, except for their abdominal segments, where
more » ... l segments, where females are better developed due to the female reproductive function.
doi:10.15835/buasvmcn-asb:11455 fatcat:alx3r5swn5aqxoeq6q623dezyq