Abstract
The life cycle, population dynamics, growth and secondary production of the land snail C. vindobonensis were studied in northern Greece. Demographic analysis of the populations of C. vindobonensis revealed that a) three cohorts were present in the field throughout the year, b) the reproductive period started in late April-May and the newly hatched snails appeared in the beginning of June, and c) increased growth rates were observed during spring and early summer, but also during autumn for the newly hatched snails. According to von Bertalanffy's method C. vindobonensis needs 7 years to attain its maximum size measured in the field. Mortality rate is very high during the first year of life, while life expectancy is higher during the second year of life and decreases afterwards. Net reproductive rate (R,,) was equal to 3.1 and the finite capacity for increase (antilogy,.) was equal to 1. Estimated annual secondary production with Hynes' frequency method revealed a mean standing crop (B) of 0.99 g/m2/year and a production (P) of 1.3 ± 0.11 g/m2/year. Annual turnover ratio (P/B) was equal to 1.31.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
